From info-volumizer-owner@els.sgi.com Thu Oct 2 13:02:35 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h92K1s1H5623946; Thu, 2 Oct 2003 13:01:54 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h91Ke1gJ5582156 for ; Wed, 1 Oct 2003 13:40:02 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h91Kapm0111448 for ; Wed, 1 Oct 2003 23:36:51 +0300 Date: Wed, 1 Oct 2003 23:37:14 +0300 (IDT) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] Problem with structured grid Message-ID: MIME-Version: 1.0 Content-Type: MULTIPART/Mixed; BOUNDARY="118079656-2031330196-1065040459=:884" Content-ID: Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --118079656-2031330196-1065040459=:884 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII Content-ID: Hi all, I'm trying to use volumizer2 with structured hexahedral mesh. As trial I modified the /usr/share/Volumizer2/src/app/simplee/pguide/glut.cxx (the modified file is attached) and I can't get nothing to be drawn:-( I try to use structured hexahedral mesh of one cube 1.0x1.0x1.0, simple luts (rgba or intensity). I think that lut is initialized ok, vertex coords are the only suspect here. Any ideas? Thanks in advance, Jack. --118079656-2031330196-1065040459=:884 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII; NAME="myexample.c++" Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Content-Disposition: ATTACHMENT; FILENAME="myexample.c++" Ly8gQyAvIEMrKw0KI2luY2x1ZGUgPHN0ZGlvLmg+DQojaW5jbHVkZSA8c3Rk bGliLmg+DQojaW5jbHVkZSA8aW9zdHJlYW0uaD4NCg0KLy8gT3BlbkdMIC8g R0xVVA0KI2luY2x1ZGUgPEdML2dsLmg+DQojaW5jbHVkZSA8R0wvZ2x1dC5o Pg0KDQovLyBJRkwNCiNpbmNsdWRlIDxsb2FkZXJzL0lGTExvYWRlci5oPg0K DQovLyBWb2x1bWl6ZXIyDQojaW5jbHVkZSA8Vm9sdW1pemVyMi9WZXJzaW9u Lmg+DQojaW5jbHVkZSA8Vm9sdW1pemVyMi9TaGFwZS5oPg0KI2luY2x1ZGUg PFZvbHVtaXplcjIvR2VvbWV0cnkuaD4NCiNpbmNsdWRlIDxWb2x1bWl6ZXIy L1ZlcnRleEFycmF5Lmg+DQojaW5jbHVkZSA8Vm9sdW1pemVyMi9TdHJ1Y3R1 cmVkSGV4YU1lc2guaD4NCiNpbmNsdWRlIDxWb2x1bWl6ZXIyL0FwcGVhcmFu Y2UuaD4NCiNpbmNsdWRlIDxWb2x1bWl6ZXIyL1BhcmFtZXRlclZlcnRleERh dGEuaD4NCiNpbmNsdWRlIDxWb2x1bWl6ZXIyL1BhcmFtZXRlckxvb2t1cFRh YmxlLmg+DQovLyBQcm9qZWN0ZWQgdGV0cmFoZWRyYSBSZW5kZXIgQWN0aW9u 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h93AWZgJ5326202 for ; Fri, 3 Oct 2003 03:32:36 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id OAA54365 for ; Fri, 3 Oct 2003 14:47:22 +0530 (IST) Message-ID: <009a01c3899a$1e5483d0$4a5a0e86@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] Problem with structured grid Date: Fri, 3 Oct 2003 16:05:42 +0530 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_0093_01C389C8.3220F0F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com This is a multi-part message in MIME format. ------=_NextPart_000_0093_01C389C8.3220F0F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi Yakov, Try this minor variation which is attached with this mail. It should work better. Volumizer does not do a deep copy of pointers passed to it, i.e. it assumes that the pointers are valid pointers and simply stores the addresses internally. This is done to facilitate management of large data sets by preventing unnecessary copies of the data set in memory as well as saving cycles spent on moiving data around. Passing pointers to local arrays to Volumizer is not a very good idea in general! In this case, I simply made the arrays static to get the app to work but in general, you should use vzMemory::malloc() and vzMemory::free to allocate and free pointers passed to Volumizer (see man vzMemory). Cheers, Praveen ----- Original Message ----- From: "Yakov Mindelis" To: Sent: Thursday, October 02, 2003 2:07 AM Subject: [info-volumizer] Problem with structured grid > Hi all, > > > I'm trying to use volumizer2 with structured hexahedral mesh. As trial I > modified the /usr/share/Volumizer2/src/app/simplee/pguide/glut.cxx > (the modified file is attached) and I can't get nothing to be drawn:-( > > I try to use structured hexahedral mesh of one cube 1.0x1.0x1.0, simple > luts (rgba or intensity). > > I think that lut is initialized ok, vertex coords are the only suspect > here. > > Any ideas? > Thanks in advance, > Jack. > ------=_NextPart_000_0093_01C389C8.3220F0F0 Content-Type: application/octet-stream; name="myexample.c" Content-Transfer-Encoding: quoted-printable Content-Disposition: attachment; filename="myexample.c" // C / C++ #include #include #include // OpenGL / GLUT #include #include // IFL #include // Volumizer2 #include #include #include #include #include #include #include #include // Projected tetrahedra Render Action... #include #include // Global variables vzShape *shape =3D NULL; vzPTRenderAction *renderAction =3D NULL; GLint viewport[4]; int lastPosition[2] =3D {0, 0}; float angles[2] =3D {0, 0}, lastAngles[2] =3D {0, 0}; //////////////////////// Volumizer ////////////////////////////// // Load the volume data and initialize the shape node. void loadVolumeData(char *fileName) { // Print the volumizer version string cerr<loadVolume();=20 // if (volume =3D=3D NULL) { // cerr<<"Error:couldn't read volume data"<computeBoundingBox (bbox); printf("bbox:\n%f %f %f, %f %f %f\n",=20 bbox[0], bbox[1], bbox[2], bbox[3], bbox[4], bbox[5]); vzParameterVertexData *volume =3D=20 new vzParameterVertexData ( 8, 1, &data[0]); float datarange[2]; volume->getDataRange(0,datarange); printf("datarange:\n%f, %f\n", datarange[0], datarange[1]); // vzParameterLookupTable *lut =3D new vzParameterLookupTable(4, = &lutdatargba[0], VZ_FLOAT , VZ_RGBA); vzParameterLookupTable *lut =3D new vzParameterLookupTable(2, = &lutdataintensity[0], VZ_FLOAT , VZ_LUMINANCE); // Initialize appearance vzPTLUTShader *shader =3D new vzPTLUTShader(); vzAppearance *appearance =3D new vzAppearance(shader); shader->unref(); appearance->setParameter("vertex_data", volume); appearance->setParameter("lookup_table", lut); volume->unref(); lut->unref(); // Initialize shape node shape =3D new vzShape(geometry, appearance); geometry->unref(); appearance->unref(); // Initialize the render action renderAction =3D new vzPTRenderAction(); renderAction->manage(shape); } // Draw the volume data void renderVolumeData() { glColor3f( 1.0, 1.0, 0.0 ); =20 // Do the Volumizer rendering here... renderAction->beginDraw(0); renderAction->draw(shape); renderAction->endDraw(); =20 // // Do the Volumizer rendering here... // glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); // // Begin drawing // renderAction->beginDraw(0); // renderAction->drawCells(shape, false); // renderAction->drawBoundary(shape, false); // renderAction->endDraw(); // glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); } // Clean up the shape node and the render action void cleanup() { // Delete the render action and unref() the shape node renderAction->unmanage(shape); delete renderAction; shape->unref(); } /////////////////////// GLUT callback functions/////////////////// // glutDisplayFunc() callback function void display() { glClear(GL_COLOR_BUFFER_BIT); glDisable(GL_DEPTH_TEST); // Viewport glViewport(viewport[0], viewport[1], viewport[2], viewport[3]); // Projection matrix glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-1, 1, -1, 1, -1, 1); // Modelview matrix glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glRotated( 90 + angles[1], 1, 0, 0); glRotated(180 + angles[0], 0, 0, 1); // glScalef(1.5, 1.5, 1.5); glTranslatef(- 0.5, - 0.5, - 0.5); // Enable back-to-front alpha blending glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Render the volume data renderVolumeData(); glutSwapBuffers(); } // glutKeyboardFunc() callback function void keyboard(unsigned char key, int x, int y) { switch (key) { case 27: cleanup(); exit(0); } } // glutReshapeFunc() callback function void reshape(int width, int height) { // Update viewport viewport[0] =3D 0; viewport[1] =3D 0; viewport[2] =3D width; viewport[3] =3D height; glutPostRedisplay(); } // glutMouseFunc() callback function void mouse(int button, int state, int x, int y) { if (state =3D=3D GLUT_DOWN) { lastPosition[0] =3D x; lastPosition[1] =3D y; lastAngles[0] =3D angles[0]; lastAngles[1] =3D angles[1]; } } // glutMotionFunc() callback function void motion(int x, int y) { angles[0] =3D lastAngles[0] + (lastPosition[0] - x) / 4.0; angles[1] =3D lastAngles[1] + (y - lastPosition[1]) / 4.0; glutPostRedisplay(); } // main int main(int argc, char *argv[]) { if(argc >1) { cerr<<"Usage: "<; Sat, 4 Oct 2003 14:28:22 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h94LQ2m0116340 for ; Sat, 4 Oct 2003 23:26:02 +0200 Date: Sat, 4 Oct 2003 23:24:25 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] Problem with structured grid In-Reply-To: <009a01c3899a$1e5483d0$4a5a0e86@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com On Fri, 3 Oct 2003, Praveen Bhaniramka wrote: > Try this minor variation which is attached with this mail. It should work > better. Thanks, it helped... > Volumizer does not do a deep copy of pointers passed to it, i.e. it assumes > that the pointers are valid pointers and simply stores the addresses > internally. This is done to facilitate management of large data sets by > preventing unnecessary copies of the data set in memory as well as saving > cycles spent on moiving data around. Passing pointers to local arrays to > Volumizer is not a very good idea in general! Oook, when arrays used inside classes as members, it'll should work as is... 10X, Jack. From info-volumizer-owner@els.sgi.com Sun Oct 5 12:47:07 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h95JjfUH5637589; Sun, 5 Oct 2003 12:45:41 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9593pgJ5659683 for ; Sun, 5 Oct 2003 02:03:52 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h9591Vm0067492 for ; Sun, 5 Oct 2003 11:01:31 +0200 Date: Sun, 5 Oct 2003 10:59:32 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi, Is it possible to use vzTMShader with vzStructuredHexaMesh? If yes how does the LUT finction in this case. BTW: the purpose of this is to create array of hexahedral shapes sith their own vertex data defined by apropriate array of vzParameterVolumeTexture-s Thanks in advance, Jack. From info-volumizer-owner@els.sgi.com Sun Oct 5 12:47:34 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h95JjfwW5692639; Sun, 5 Oct 2003 12:45:41 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h94LYIgJ5645658 for ; Sat, 4 Oct 2003 14:34:19 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h94LW0m0080010 for ; Sat, 4 Oct 2003 23:32:00 +0200 Date: Sat, 4 Oct 2003 23:30:23 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] volumizer2 and rgba problems (fwd) Message-ID: MIME-Version: 1.0 Content-Type: MULTIPART/Mixed; BOUNDARY="118079656-729462469-1065297112=:26468" Content-ID: Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --118079656-729462469-1065297112=:26468 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII Content-ID: I tried t create LUT so I could pass the rgb and alpha values separately and got the following results: 1 LUT creation ("value" and "detailed value" are number of entry in LUT), rgba values are floats (0.0->1.0) : 512 entries -> 101 spectrums > alpha intervals of 0.01 spectrum 1 (0-4) RGB A value detailed_value 001 0 0 0(alpha=0)+rgb(normalized to range[0-4]) 011 0 1 010 0 2 110 0 3 100 0 4 spectrum 2 (5-9) RGB A value detailed_value 001 0.01 5 5(alpha=0.01)+rgb 011 0.01 6 010 0.01 7 110 0.01 8 100 0.01 9 spectrum 100(495-499) RGB A value detailed_value 001 0.99 495 495(alpha=0.99)+rgb 011 0.99 496 010 0.99 497 110 0.99 498 100 0.99 499 not used: rgba value 0000 500 | v 0000 506 spectrum 101 - last one (507-511) RGB A value detailed_value 001 1 507 507(alpha=100)+rgb 011 1 508 010 1 509 110 1 510 100 1 511 where spectrum is(float 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W5EP/L3dpsHY7tiIg7qajpaPheK00UHDSGWTg2Buu873HG8nnO9d6IgIiICI iAiIgIiICIiAiIgIiICIiAiIgIiICIiAiIgIiICIiAiIg//Z --118079656-729462469-1065297112=:26468-- From info-volumizer-owner@els.sgi.com Sun Oct 5 23:34:41 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h966XItf5686759; Sun, 5 Oct 2003 23:33:18 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h966QZgJ5668495 for ; Sun, 5 Oct 2003 23:26:39 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id KAA97904 for ; Mon, 6 Oct 2003 10:41:24 +0530 (IST) Message-ID: <008601c38bd3$3dd6e640$4a5a0e86@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? Date: Mon, 6 Oct 2003 11:59:47 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Yakov, The shader is part of the shape's visual attributes (appearance) while the geometry provides the spatial attributes. Hence by definition they are independent of each other. Simply put, any of the shaders should be usable with any of the geometry types. In your case however, it is probably more important to decide which render-action makes sense for your problem. The TMShader is used with TMRenderAction and hence the rendering will be implemented by slicing the geometry using viewport aligned slices and rendering this 'proxy geometry'. The geometry simply provides the region of interest in this case since the values in the ParameterVolumeTexture are mapped to the geometryROI (a cuboidal region) using texgen. Hence there is no direct correspondence between the vertex coordinates in the StructuredHexaMesh and the values in the ParameterVolumeTexture. When using the PTRenderAction though, the vertex coordinates of the geometry correspond to the vertex values in the ParameterVertexData. Hence there is a direct correspondence between the geometry and the appearance of the shape. In either of the above cases, the LUT is simply applied as a post-interpolation lookup used to map the value at the rendered vertex to an RGBA value. Cheers, Praveen ----- Original Message ----- From: "Yakov Mindelis" To: Sent: Sunday, October 05, 2003 2:29 PM Subject: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? > Hi, > > Is it possible to use vzTMShader with vzStructuredHexaMesh? If yes how > does the LUT finction in this case. > > BTW: the purpose of this is to create array of hexahedral shapes sith > their own vertex data defined by apropriate array of > vzParameterVolumeTexture-s > > > > Thanks in advance, > Jack. > From info-volumizer-owner@els.sgi.com Mon Oct 6 00:11:03 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h967AgC45651230; Mon, 6 Oct 2003 00:10:42 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9675CgJ5681530 for ; Mon, 6 Oct 2003 00:05:15 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id LAA98991 for ; Mon, 6 Oct 2003 11:20:02 +0530 (IST) Message-ID: <00b001c38bd8$a2abc9f0$4a5a0e86@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] volumizer2 and rgba problems (fwd) Date: Mon, 6 Oct 2003 12:38:25 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Yakov, This is very correct. Volumizer uses 'post-interpolation' lookup tables (LUTs) to specify the per-vertex RGBA values for the rendered geometry. Essentially, the per-vertex values are interpolated and then mapped to corresponding RGBA values in the LUT. A side effect of this technique is that the maximum number of output RGBA values is limited by the resolution of your LUT. 'Pre-interpolation' lookup tables, where the RGBA values are looked-up and then interpolated, on the other hand can cause color-bleeding. Color-bleeding can generate very undesirable results for certain volume visualization applications. For example in medical, specific RGBA values in the LUT might be used to identify different regions/meterials in the data set like soft tissue and bone. Pre-interpolation lookup will cause the boundaries between the materials to have a different color (interpolated between the two colors for bone and tissue) while post-interpolation will generate 'sharper' boundaries. Hope this helps make things clearer. Cheers, Praveen ----- Original Message ----- From: "Yakov Mindelis" To: Sent: Sunday, October 05, 2003 3:00 AM Subject: [info-volumizer] volumizer2 and rgba problems (fwd) > I tried t create LUT so I could pass the rgb and alpha values separately > and got the following results: > > 1 LUT creation ("value" and "detailed value" are number of entry in LUT), > rgba values are floats (0.0->1.0) : > 512 entries -> 101 spectrums > alpha intervals of 0.01 > > spectrum 1 (0-4) > > RGB A value detailed_value > 001 0 0 0(alpha=0)+rgb(normalized to range[0-4]) > 011 0 1 > 010 0 2 > 110 0 3 > 100 0 4 > > spectrum 2 (5-9) > RGB A value detailed_value > 001 0.01 5 5(alpha=0.01)+rgb > 011 0.01 6 > 010 0.01 7 > 110 0.01 8 > 100 0.01 9 > > spectrum 100(495-499) > RGB A value detailed_value > 001 0.99 495 495(alpha=0.99)+rgb > 011 0.99 496 > 010 0.99 497 > 110 0.99 498 > 100 0.99 499 > > not used: > rgba value > 0000 500 > | > v > 0000 506 > > spectrum 101 - last one (507-511) > RGB A value detailed_value > 001 1 507 507(alpha=100)+rgb > 011 1 508 > 010 1 509 > 110 1 510 > 100 1 511 > > where spectrum is(float rgb values): > > r g b > 0 0 1//region1 blue->cyan > 0 1 1//region2 cyan->green > 0 1 0//region3 gren->yellow > 1 1 0//region4 yellow->red > 1 0 0 > > > Then I created cube with coords: > float xyz[24] = {0.0, 0.0, 0.0, > 1.0, 0.0, 0.0, > 0.0, 1.0, 0.0, > 1.0, 1.0, 0.0, > 0.0, 0.0, 1.0, > 1.0, 0.0, 1.0, > 0.0, 1.0, 1.0, > 1.0, 1.0, 1.0}; > > and vertex data: > float data[8]; > data[0] = rgba2lutvalue(0.0, 0);//0 - blue > data[1] = rgba2lutvalue(1.0, 0);//red > data[2] = rgba2lutvalue(1.0, alpha);//red > data[3] = rgba2lutvalue(0.0, 0);//blue > data[4] = rgba2lutvalue(1.0, 0); > data[5] = rgba2lutvalue(1.0, 0); > data[6] = rgba2lutvalue(1.0, 0); > data[7] = rgba2lutvalue(1.0, 1.0);//511 > > where alpha=0, 0.01, 0.02 > > where rgba2lutvalue(rgb, alpha) takes float rgba values and returns the > correspinding entry in LUT. rgb=0 - blue, > rgb=1.0 - red, 0 last(red). Volumizer interpolate these values inside of the LUT and gets > the coressponding interpolated values of rgba. > > As you can see MIN(data)=0, MAX(data)=511. data[0:3] describe the upper > face of cube. In attached image, on the left there is upper face with > correct passage of colors through the spectrum. In the middle image one of > the corners of upper face has alpha=0.01, so the passage contains one > additional spectrum, and the image on the right contains two additional > spectrums. > > Conclusion: > volumizer interpolates the LUT values passed to the > vertices instead of their corresponding rgba values taken from lut! > > that means if I have several cubes to draw I can not change alpha inside > cube more than the resoluton of alpha used in LUT (0.01 in this example) > > Any ideas? > Jack. > From info-volumizer-owner@els.sgi.com Mon Oct 6 23:07:49 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h97676Zh5710423; Mon, 6 Oct 2003 23:07:06 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2] (may be forged)) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h96L1igJ5646485 for ; Mon, 6 Oct 2003 14:02:00 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h96Kx8m0071802 for ; Mon, 6 Oct 2003 22:59:08 +0200 Date: Mon, 6 Oct 2003 22:55:59 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? In-Reply-To: <008601c38bd3$3dd6e640$4a5a0e86@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com > In your case however, it is probably more important to decide which > render-action makes sense for your problem. The TMShader is used with > TMRenderAction and hence the rendering will be implemented by slicing the > geometry using viewport aligned slices and rendering this 'proxy geometry'. > The geometry simply provides the region of interest in this case since the > values in the ParameterVolumeTexture are mapped to the geometryROI (a > cuboidal region) using texgen. Hence there is no direct correspondence > between the vertex coordinates in the StructuredHexaMesh and the values in > the ParameterVolumeTexture. > > When using the PTRenderAction though, the vertex coordinates of the geometry > correspond to the vertex values in the ParameterVertexData. Hence there is a > direct correspondence between the geometry and the appearance of the shape. > > In either of the above cases, the LUT is simply applied as a > post-interpolation lookup used to map the value at the rendered vertex > to an RGBA value. Ok, I see, let me ask it as follows: The situation when I define lut wich allows me to control rgb and a values independently introduce the problem of lut-value based interpolation instead of 4 (r, g, b, a) interpolation. In this case the alpha value was defined in non-continuous way. Defifning rgb value in non-continuous way will led to correct colors but with alpha jumps when passing form on color value defined by the resolution to another. The "workaround" (I don't know yet if it is viable, that's why the quotes are there) is to make vzShapeSet instead of vzShape. The easiest way is to implement is to create hexaMesh of one hexahedra per shape instead of vzBolck alligned with the mesh hexahedra (the mesh isn't cartesion, so it is not box with all angles of 90 degrees). How much will it impact performance/memory usage comparing to vzStructuredHexaMesh? Thanks in advance, Jack. From info-volumizer-owner@els.sgi.com Tue Oct 7 03:50:45 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h97Amrwf5690213; Tue, 7 Oct 2003 03:48:53 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h97AjAgJ5670086 for ; Tue, 7 Oct 2003 03:45:13 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id OAA23166 for ; Tue, 7 Oct 2003 14:59:56 +0530 (IST) Message-ID: <014c01c38cc0$87378cc0$4a5a0e86@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? Date: Tue, 7 Oct 2003 16:18:21 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Yakov, > Ok, I see, let me ask it as follows: > > The situation when I define lut wich allows me to control rgb and a values > independently introduce the problem of lut-value based interpolation > instead of 4 (r, g, b, a) interpolation. In this case the alpha value was > defined in non-continuous way. Defifning rgb value in non-continuous way > will led to correct colors but with alpha jumps when passing form on > color value defined by the resolution to another. Currently, it is only possible to use one of the vertex attributes to lookup the LUT when using the PTLUTShader. If you want to specify the per-vertex RGB colors and use them for the rendering directly, we will need to provide you with a new shader for that since the current render action infrastructure hides this functionality from the application developer. > The "workaround" (I > don't know yet if it is viable, that's why the quotes are there) is to > make vzShapeSet instead of vzShape. The easiest way is to implement is to > create hexaMesh of one hexahedra per shape instead of vzBolck alligned > with the mesh hexahedra (the mesh isn't cartesion, so it is not box with > all angles of 90 degrees). How much will it impact performance/memory > usage comparing to vzStructuredHexaMesh? The other bigger issue with this approach is that of correctness. The hexahedral shapes will need to be sorted in a back-to-front visibility sorted order before rendering to ensure correct alpha compositing. This will be much harder to do with hexahedral elements. Currently, Volumizer will tessellate your grid into a tetrahedral mesh, sort the tetrahedra using the current viewing information and then render each tetrahedron in the computed order. Sorting the hexahedral elements directly will be a nightmare and more likely to give inaccurate results. - Praveen From info-volumizer-owner@els.sgi.com Tue Oct 7 08:53:46 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h97FrG045716404; Tue, 7 Oct 2003 08:53:16 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h97DXpgJ5667616 for ; Tue, 7 Oct 2003 06:33:52 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h97DVPm0036110 for ; Tue, 7 Oct 2003 15:31:25 +0200 Date: Tue, 7 Oct 2003 15:30:53 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? In-Reply-To: <014c01c38cc0$87378cc0$4a5a0e86@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Praveen, > > Ok, I see, let me ask it as follows: > > > > The situation when I define lut wich allows me to control rgb and a values > > independently introduce the problem of lut-value based interpolation > > instead of 4 (r, g, b, a) interpolation. In this case the alpha value was > > defined in non-continuous way. Defifning rgb value in non-continuous way > > will led to correct colors but with alpha jumps when passing form on > > color value defined by the resolution to another. > > Currently, it is only possible to use one of the vertex attributes to lookup > the LUT when using the PTLUTShader. If you want to specify the per-vertex > RGB colors and use them for the rendering directly, we will need to provide > you with a new shader for that since the current render action > infrastructure hides this functionality from the application developer. Any hints how to do that? The reference is rather sparse (11 lines). There is also note about ISL-based shaders. Any help/simple-example-of-custom-shader will be appreciated > order. Sorting the hexahedral elements directly will be a nightmare and more > likely to give inaccurate results. I was afraid that the sorting issue would pop up here (and it did:( ) TIA, Jack From info-volumizer-owner@els.sgi.com Wed Oct 8 22:51:03 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h995oJ4E5713442; Wed, 8 Oct 2003 22:50:19 -0700 (PDT) Received: from tolkor.sgi.com (tolkor.sgi.com [198.149.18.6]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h98La9gJ5720067 for ; Wed, 8 Oct 2003 14:36:09 -0700 (PDT) Received: from ledzep.americas.sgi.com (ledzep.americas.sgi.com [192.48.203.134]) by tolkor.sgi.com (8.12.9/8.12.9/linux-outbound_gateway-1.1) with ESMTP id h98Lp3Hc030621 for ; Wed, 8 Oct 2003 16:51:03 -0500 Received: from spindle.corp.sgi.com (spindle.corp.sgi.com [198.29.75.13]) by ledzep.americas.sgi.com (8.12.9/8.12.9/generic_config-1.2) with ESMTP id h98LXElm23815433 for ; Wed, 8 Oct 2003 16:33:14 -0500 (CDT) Received: from mtv-atc-009e--n.corp.sgi.com (mtv-atc-009e--n.corp.sgi.com [192.26.60.130]) by spindle.corp.sgi.com (8.12.9/8.12.9/generic_config-1.2) with ESMTP id h98LXDXb115708080; Wed, 8 Oct 2003 14:33:13 -0700 (PDT) Received: by mtv-atc-009e--n.corp.sgi.com with Internet Mail Service (5.5.2655.55) id <4PFZRN8P>; Wed, 8 Oct 2003 14:33:13 -0700 Message-ID: <401AB3C78169D711B9F50004ACE84267013845B8@mtv-atc-009e--n.corp.sgi.com> From: Thomas Tannert To: "'info-volumizer@sgi.com'" , "'info-performer@sgi.com'" Subject: [info-volumizer] IEEE Vis 2003 Volumizer + Scalability Birds-of-a-Feather Meeting Information Date: Wed, 8 Oct 2003 14:33:11 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: text/plain; charset="ISO-8859-1" Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com ======================================================================== OpenGL Volumizer and Scalability Techniques for Scientific Visualization "Birds-of-a-Feather" Meeting Tuesday, October 21 6:30pm-8:00pm Doubletree Seattle Airport Room: Cascade 1 ======================================================================== Volumizers and all IEEE Visualization 2003 attendees, Please join us for the OpenGL Volumizer and Scalability Techniques for Scientific Visualization "Birds-of-a-Feather" meeting in two weeks in Seattle, WA at IEEE Visualization 2003. http://vis.computer.org/vis2003/ We will be discussing the latest news about OpenGL Volumizer. The latest version of this API, OpenGL Volumizer 2.6, enables the creation of more sophisticated applications that combine advanced volumetric and surface rendering techniques with scalable system capabilities to significantly reduce time to discovery. Scalability enhancements have also been made in non-volumetric hardware, scene graphs and GPU based rendering that enable applications that focus on geometric rendering or integrate geometry with volume data to work with every increasing data set sizes and deliver greater performance and image fidelity. These techniques will be reviewed and their implications for scientific visualization discussed. Finally, a sneak preview of OpenGL Volumizer 2.6 will be shown and we will be showcasing SGI's new scalable graphics engine the SGI Onyx4 UltimateVision at the meeting. Agenda: 6:30pm Social Reception; Drinks & Hors D'ouvres 6:45pm Welcome & Volumizer Update Scalability techniques and SGI Core Rendering News & Update Volumizer 2.6 and other DEMOS Q&A 8:00pm Adjourn We look forward to seeing you there! Thank You- Thomas. -------------------------------------------- Thomas Tannert VSG Marketing - SGI 1600 Amphitheatre Pkwy., M/S 405 Mt View, CA 94043 E-mail: ttannert@sgi.com Phone: (650) 933 5237 From info-volumizer-owner@els.sgi.com Thu Oct 9 01:47:42 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h998k52g5728918; Thu, 9 Oct 2003 01:46:05 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h998dkgJ5365825 for ; Thu, 9 Oct 2003 01:39:49 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id MAA69575 for ; Thu, 9 Oct 2003 12:54:28 +0530 (IST) Message-ID: <00e601c38e41$55749cf0$4a5a0e86@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? Date: Thu, 9 Oct 2003 14:12:50 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com > > Currently, it is only possible to use one of the vertex attributes to lookup > > the LUT when using the PTLUTShader. If you want to specify the per-vertex > > RGB colors and use them for the rendering directly, we will need to provide > > you with a new shader for that since the current render action > > infrastructure hides this functionality from the application developer. > > Any hints how to do that? The reference is rather sparse (11 lines). There > is also note about ISL-based shaders. Any help/simple-example-of-custom-shader > will be appreciated Unfortunately, there is no infrastructure for implementing custom shaders right now in the PTRenderAction. The ISL-based and other custom shaders can be used only with the TMRenderAction. We will want to provide something similar for the PTRenderAction in the near-future. For now, I will put it on the Volumizer TODO list :-) Thanks. Praveen From info-volumizer-owner@els.sgi.com Thu Oct 9 10:01:46 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h99GxCAr5489152; Thu, 9 Oct 2003 09:59:12 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h99GMZgJ5684934 for ; Thu, 9 Oct 2003 09:22:36 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h99GK4m0108122 for ; Thu, 9 Oct 2003 18:20:04 +0200 Date: Thu, 9 Oct 2003 18:18:55 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? In-Reply-To: <00e601c38e41$55749cf0$4a5a0e86@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Praveen, > Unfortunately, there is no infrastructure for implementing custom shaders > right now in the PTRenderAction. The ISL-based and other custom shaders can > be used only with the TMRenderAction. We will want to provide something > similar for the PTRenderAction in the near-future. For now, I will put it on > the Volumizer TODO list :-) Can you drop some bones to the poor people here, like: chances for separate rgba implementations with meshes in next version? TIA, Jack. From info-volumizer-owner@els.sgi.com Thu Oct 9 10:40:45 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h99Hdwnr5690014; Thu, 9 Oct 2003 10:39:58 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h99HNXgJ5787830 for ; Thu, 9 Oct 2003 10:23:35 -0700 (PDT) Received: from praveenlaptop (mtv-vpn-sw-corp-0-56.corp.sgi.com [134.15.0.56]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id VAA81527 for ; Thu, 9 Oct 2003 21:38:09 +0530 (IST) Message-ID: <00b101c38e8a$801d49e0$130a10ac@praveenlaptop> From: "Praveen Bhaniramka" To: "info-volumizer" Subject: [info-volumizer] Win an Onyx4 UltimateVision - The SGI and ATI Demo Challenge Date: Thu, 9 Oct 2003 22:56:29 +0530 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00AA_01C38EB8.934DC520" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com This is a multi-part message in MIME format. ------=_NextPart_000_00AA_01C38EB8.934DC520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Volumizers, Have a look and spread the word: The SGI and ATI Demo Challenge http://www.sgi.com/visualization/onyx4/challenge/ Quoting the site: SGI and ATI Technologies are out to find the hottest graphics programmers and reward them with the best visualization technology in the world. What's at stake? Over $80,000 worth in prizes and bragging rights to the most compelling OpenGL API demos as judged by a panel of visualization luminaries. 2 Grand Prize winners each receive an Onyx4 UltimateVision system -- the most powerful visualization system on the planet - a $40,000 value per system 5 First Prize winners will get an ATI FireGL X1-128 graphics accelerator card, with capabilities the average PC only dreams of having ... Visit http://www.sgi.com/visualization/onyx4/challenge/ to get all the details, FAQ, official rules, and to register. Cheers, Praveen -- Praveen Bhaniramka Advanced Graphics Division Silicon Graphics +91-98991-15641 ------=_NextPart_000_00AA_01C38EB8.934DC520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Volumizers,

Have a look and spread the word:  The = SGI and=20 ATI Demo Challenge

   http://www.sgi= .com/visualization/onyx4/challenge/

Quoting=20 the site:
SGI and ATI Technologies are out to find the hottest=20 graphics
programmers and reward them with the best visualization = technology=20 in
the world.

What's at stake?
Over $80,000 worth in prizes = and=20 bragging rights to the most compelling
OpenGL=AE API demos as judged = by a panel=20 of visualization luminaries.

2 Grand Prize winners each receive = an Onyx4=99=20 UltimateVision=99 system --
the most powerful visualization system on = the=20 planet - a $40,000 value
per system

5 First Prize winners will = get an=20 ATI=AE FireGL=99 X1-128 graphics
accelerator card, with capabilities = the average=20 PC only dreams of having

...

Visit http://www.sgi= .com/visualization/onyx4/challenge/=20 to get all the
details, FAQ, official rules, and to = register.
Cheers,
Praveen
 
--
Praveen Bhaniramka
Advanced Graphics Division
Silicon=20 Graphics
+91-98991-15641
------=_NextPart_000_00AA_01C38EB8.934DC520-- From info-volumizer-owner@els.sgi.com Thu Oct 9 10:40:41 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h99HdwSX5774200; Thu, 9 Oct 2003 10:39:58 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h99HSdgJ5697760 for ; Thu, 9 Oct 2003 10:28:42 -0700 (PDT) Received: from praveenlaptop (mtv-vpn-sw-corp-0-56.corp.sgi.com [134.15.0.56]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id VAA80988 for ; Thu, 9 Oct 2003 21:43:11 +0530 (IST) Message-ID: <00c301c38e8b$36968ba0$130a10ac@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? Date: Thu, 9 Oct 2003 23:01:30 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com > > Unfortunately, there is no infrastructure for implementing custom shaders > > right now in the PTRenderAction. The ISL-based and other custom shaders can > > be used only with the TMRenderAction. We will want to provide something > > similar for the PTRenderAction in the near-future. For now, I will put it on > > the Volumizer TODO list :-) > > Can you drop some bones to the poor people here, like: chances > for separate rgba implementations with meshes in next version? Volumizer 2.6 is scheduled to be released in December of this year. We have quite a few exciting new features coming with this release which we will be discussing at the Volumizer BOF during the upcoming IEEE Visualization conference in a couple of weeks. We will give an update on this list about this after the conference. Let me have a closer look at this particular feature and estimate the time involved in this work. I will follow-up with you offline to see what exactly you need :-) - Praveen From info-volumizer-owner@els.sgi.com Thu Oct 9 21:28:06 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9A4R4UF5790101; Thu, 9 Oct 2003 21:27:04 -0700 (PDT) Received: from boole.cs.uh.edu (Boole.cs.uh.edu [129.7.240.11]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h99KRRgJ5755745 for ; Thu, 9 Oct 2003 13:27:28 -0700 (PDT) Received: from themis.cs.uh.edu (themis [129.7.240.5]) by boole.cs.uh.edu (Postfix) with ESMTP id 1DC74F97B for ; Thu, 9 Oct 2003 15:24:30 -0500 (CDT) Received: from localhost (chingyao@localhost) by themis.cs.uh.edu (8.11.7+Sun/8.11.4) with ESMTP id h99KOTM28878 for ; Thu, 9 Oct 2003 15:24:29 -0500 (CDT) X-Authentication-Warning: themis.cs.uh.edu: chingyao owned process doing -bs Date: Thu, 9 Oct 2003 15:24:29 -0500 (CDT) From: Ching-Yao Lin To: Subject: [info-volumizer] Adjust the alpha value In-Reply-To: <00c301c38e8b$36968ba0$130a10ac@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi, We have a data which can be display using Volumizer2. The texture format is VZ_LUMINANCE, data type is unsigned char. We have also setup the lookup table for color, so we can specify the opacity of different color. Now we want to specify which area we would like to display. So we added another channel(alpha) manually into the data and set the texture format to VZ_LUMINANCE_ALPHA. However, there is no effect when we change the alpha value. Is it because the color lookup table? The Volumizer guide has mentioned that we are able to use vzTMTag Shader to do it. But I had an old program(which was using Volumizer 1.2) and I just modify the alpha value of every voxel and set dirty flag then I can get the desired result. Is the same technique can apply to Volumizer 2.4? I just did a test that even all the alpha value were initialized to 0 and I can still see the full data set. Thank you very much for your help. Ching-Yao Lin From info-volumizer-owner@els.sgi.com Thu Oct 9 22:56:09 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9A5smn85243194; Thu, 9 Oct 2003 22:54:48 -0700 (PDT) Received: from sgindia.newdelhi.sgi.com (newdelhi.sgi.com [134.14.90.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9A5rggJ5674605 for ; Thu, 9 Oct 2003 22:53:44 -0700 (PDT) Received: from praveenlaptop ([134.14.90.74]) by sgindia.newdelhi.sgi.com (980427.SGI.8.8.8/980728.SGI.AUTOCF) via SMTP id KAA96762 for ; Fri, 10 Oct 2003 10:08:22 +0530 (IST) Message-ID: <00ef01c38ef3$4c66f9c0$130a10ac@praveenlaptop> From: "Praveen Bhaniramka" To: References: Subject: Re: [info-volumizer] Adjust the alpha value Date: Fri, 10 Oct 2003 11:26:50 +0530 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Ching-Yao, I assume that you are using the TMLUTShader for rendering your volume. When using LUMINANCE_ALPHA as the format for the texture data, the LUMINANCE value in the texture would be used to lookup the RGB values in the LUT while the ALPHA value in the texture will be used to lookup the A value in the LUT. >From man glColorTableSGI - .... " Then the result of color table lookup is as follows: Resulting Texture Components Table Internal Format R G B A _____________________________________________________ GL_ALPHA R G B A[a] GL_LUMINANCE L[r] L[g] L[b] At GL_LUMINANCE_ALPHA L[r] L[g] L[b] A[a] GL_INTENSITY I[r] I[g] I[b] I[a] GL_RGB R[r] G[g] B[b] A GL_RGBA R[r] G[g] B[b] A[a] " If the LUT has internal format of RGBA, the RGB will be looked up using the rgb values of the texture data. If your case, r = g = b = LUMINANCE value of texture data. Hence the original luminance values do not control the alpha anymore. When using LUMINANCE only data however, the r = g = b = a = LUMINANCE value of texture data and so the LUMINANCE value still controls the output A value. Depending on what you want to do, there would be multiple options to accomplish the same result - 1. If you simply want to use a volume data set and 'remove' portions of the volume manually, you can go the 1.2 way and set the appropriate voxel values (LUMINANCE) to 0 and then call vzParameterVolumeTexture::setDataPtr() as you modify the data. This will essentially mark the data dirty and the data will be reloaded in the next frame. 2. If you want to keep around the original copy of the volume data and simply modify the voxel-mask, then you can use the TMTagShader, where you provide the volume data as the 'volume' texture and the voxel-mask as the 'tag' texture. Everytime you modify the tag texture, you call setDataPtr and the 'tag' texture is only reloaded. The original volume is still preserved. 3. Use your current method of having a LUMINANCE_ALPHA volume texture and control the region-of-interest using the ALPHA channel. You will still need to call setDataPtr when you modify the data. The LUMINANCE value will control the RGB of the output pixels and ALPHA will control the A as described above. When you are setting all the values to 0, I assume that you are only setting the LUMINANCE values to 0 which will force all the output pixels to have the same RGB color given by the 0'th entry in the LUT. In methods 1 and 2, the LUT can still be used to control the RGB and A values of the 'volume' texture, but not with method 3. See the examples in src/apps/simple/tmRenderAction to see the various differences, or simply use the XML loaders in volview to play with different techniques :-) hth, Praveen ----- Original Message ----- From: "Ching-Yao Lin" To: Sent: Friday, October 10, 2003 1:54 AM Subject: [info-volumizer] Adjust the alpha value > Hi, > > We have a data which can be display using Volumizer2. The texture format > is VZ_LUMINANCE, data type is unsigned char. We have also setup the lookup > table for color, so we can specify the opacity of different color. > > Now we want to specify which area we would like to display. So we added > another channel(alpha) manually into the data and set the texture format > to VZ_LUMINANCE_ALPHA. However, there is no effect when we change the > alpha value. Is it because the color lookup table? > > The Volumizer guide has mentioned that we are able to use vzTMTag Shader > to do it. But I had an old program(which was using Volumizer 1.2) and I > just modify the alpha value of every voxel and set dirty flag then I can > get the desired result. Is the same technique can apply to Volumizer 2.4? > > I just did a test that even all the alpha value were initialized to 0 and > I can still see the full data set. > > > Thank you very much for your help. > > Ching-Yao Lin > > From info-volumizer-owner@els.sgi.com Sun Oct 12 03:41:23 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9CAeYKx5795455; Sun, 12 Oct 2003 03:40:34 -0700 (PDT) Received: from mtaw6.prodigy.net (mtaw6.prodigy.net [64.164.98.56]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9AFGZgJ5791182 for ; Fri, 10 Oct 2003 08:16:36 -0700 (PDT) Received: from cs.uh.edu (adsl-65-70-208-173.dsl.austtx.swbell.net [65.70.208.173]) by mtaw6.prodigy.net (8.12.9/8.12.3) with ESMTP id h9AFDG7Q010058 for ; Fri, 10 Oct 2003 08:13:17 -0700 (PDT) Message-ID: <3F86A0C1.C3FE4A74@cs.uh.edu> Date: Fri, 10 Oct 2003 07:06:25 -0500 From: Ching-Yao Lin X-Mailer: Mozilla 4.8C-SGI [en] (X11; U; IRIX64 6.5 IP35) X-Accept-Language: en MIME-Version: 1.0 To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] Adjust the alpha value References: <00ef01c38ef3$4c66f9c0$130a10ac@praveenlaptop> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi, Praveen, Thank you very much for your input. I guess I will try option 2. We have both 2D slices(using traditional 2D texture) and 3D volume(using Volumizer) on the screen. We only want to adjust the visible part of 3D volume. Maybe option 2 is a better solution. Thanks again. Ching-Yao Praveen Bhaniramka wrote: > > Hi Ching-Yao, > > I assume that you are using the TMLUTShader for rendering your volume. When > using LUMINANCE_ALPHA as the format for the texture data, the LUMINANCE > value in the texture would be used to lookup the RGB values in the LUT while > the ALPHA value in the texture will be used to lookup the A value in the > LUT. > > >From man glColorTableSGI - > .... > " > Then the result of color table lookup is as follows: > > Resulting Texture Components > Table Internal Format R G B A > _____________________________________________________ > GL_ALPHA R G B A[a] > GL_LUMINANCE L[r] L[g] L[b] At > GL_LUMINANCE_ALPHA L[r] L[g] L[b] A[a] > GL_INTENSITY I[r] I[g] I[b] I[a] > GL_RGB R[r] G[g] B[b] A > GL_RGBA R[r] G[g] B[b] A[a] > " > > If the LUT has internal format of RGBA, the RGB will be looked up using the > rgb values of the texture data. If your case, r = g = b = LUMINANCE value of > texture data. Hence the original luminance values do not control the alpha > anymore. When using LUMINANCE only data however, the r = g = b = a = > LUMINANCE value of texture data and so the LUMINANCE value still controls > the output A value. > > Depending on what you want to do, there would be multiple options to > accomplish the same result - > > 1. If you simply want to use a volume data set and 'remove' portions of the > volume manually, you can go the 1.2 way and set the appropriate voxel values > (LUMINANCE) to 0 and then call vzParameterVolumeTexture::setDataPtr() as you > modify the data. This will essentially mark the data dirty and the data will > be reloaded in the next frame. > 2. If you want to keep around the original copy of the volume data and > simply modify the voxel-mask, then you can use the TMTagShader, where you > provide the volume data as the 'volume' texture and the voxel-mask as the > 'tag' texture. Everytime you modify the tag texture, you call setDataPtr and > the 'tag' texture is only reloaded. The original volume is still preserved. > 3. Use your current method of having a LUMINANCE_ALPHA volume texture and > control the region-of-interest using the ALPHA channel. You will still need > to call setDataPtr when you modify the data. The LUMINANCE value will > control the RGB of the output pixels and ALPHA will control the A as > described above. When you are setting all the values to 0, I assume that you > are only setting the LUMINANCE values to 0 which will force all the output > pixels to have the same RGB color given by the 0'th entry in the LUT. > > In methods 1 and 2, the LUT can still be used to control the RGB and A > values of the 'volume' texture, but not with method 3. See the examples in > src/apps/simple/tmRenderAction to see the various differences, or simply use > the XML loaders in volview to play with different techniques :-) > > hth, > Praveen > > ----- Original Message ----- > From: "Ching-Yao Lin" > To: > Sent: Friday, October 10, 2003 1:54 AM > Subject: [info-volumizer] Adjust the alpha value > > > Hi, > > > > We have a data which can be display using Volumizer2. The texture format > > is VZ_LUMINANCE, data type is unsigned char. We have also setup the lookup > > table for color, so we can specify the opacity of different color. > > > > Now we want to specify which area we would like to display. So we added > > another channel(alpha) manually into the data and set the texture format > > to VZ_LUMINANCE_ALPHA. However, there is no effect when we change the > > alpha value. Is it because the color lookup table? > > > > The Volumizer guide has mentioned that we are able to use vzTMTag Shader > > to do it. But I had an old program(which was using Volumizer 1.2) and I > > just modify the alpha value of every voxel and set dirty flag then I can > > get the desired result. Is the same technique can apply to Volumizer 2.4? > > > > I just did a test that even all the alpha value were initialized to 0 and > > I can still see the full data set. > > > > > > Thank you very much for your help. > > > > Ching-Yao Lin > > > > From info-volumizer-owner@els.sgi.com Mon Oct 13 10:54:12 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9DHr8xO5784456; Mon, 13 Oct 2003 10:53:08 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9CIdRgJ5730783 for ; Sun, 12 Oct 2003 11:39:29 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h9CIamm0104138 for ; Sun, 12 Oct 2003 20:36:49 +0200 Date: Sun, 12 Oct 2003 20:33:16 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: Re: [info-volumizer] vzParameterVolumeTexture with vzStructuredHexaMesh? In-Reply-To: <00c301c38e8b$36968ba0$130a10ac@praveenlaptop> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi Praveen, > Volumizer 2.6 is scheduled to be released in December of this year. We have > quite a few exciting new features coming with this release which we will be > discussing at the Volumizer BOF during the upcoming IEEE Visualization > conference in a couple of weeks. We will give an update on this list about > this after the conference. > > Let me have a closer look at this particular feature and estimate the time > involved in this work. I will follow-up with you offline to see what exactly > you need :-) It seems that I came upon something: TFManager offers bultin spectral LUT. The TFEditor preview shows the result in rgba case as two separate channes, I hope that the class source will reveal smarter trick than one I tried to generate the desired result. Jack. From info-volumizer-owner@els.sgi.com Wed Oct 15 20:44:35 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9G3hmvi5883945; Wed, 15 Oct 2003 20:43:48 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9FLHCCx5850328 for ; Wed, 15 Oct 2003 14:17:13 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h9FLEPm0107228 for ; Wed, 15 Oct 2003 23:14:25 +0200 Date: Wed, 15 Oct 2003 23:13:38 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] Re: vzShapeSet + vzClipRenderAction problems In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi all, Still can't understand how do I draw vzShapeSet with vzClipRenderAction. How the generic draw procedure should look? Should I manage shapes before the drawing? jack->beginRage(); Oh, blast! there are only TM shaders supported, and I tried to draw the PT shader. I'm starting to get really pissed off, why is PT stuff lacks all the functionality? I'm really dissaponted from the way things are done in vz2. I can't do things I could do in vz1.2!!! jack->endRage(); Sorry for the noise again, Jack From info-volumizer-owner@els.sgi.com Wed Oct 15 20:44:35 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9G3hmt35866025; Wed, 15 Oct 2003 20:43:48 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9FL2KCx5485021 for ; Wed, 15 Oct 2003 14:02:21 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h9FKxWm0090694 for ; Wed, 15 Oct 2003 22:59:32 +0200 Date: Wed, 15 Oct 2003 22:58:45 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] Re: vzShapeSet + vzClipRenderAction problems In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com > The code appears at the end and the problem occurs on the line: > > shapeSet->add(shape1); Ooops, sorry forgot the: shapeSet = new vzShapeSet(); Silly me... Plz ignore the previous msg, Jack. From info-volumizer-owner@els.sgi.com Wed Oct 15 20:44:35 2003 Received: (from majordom@localhost) by els.sgi.com (8.12.10/8.12.2/els-2.2) id h9G3hm155878654; Wed, 15 Oct 2003 20:43:48 -0700 (PDT) Received: from aerodyne.technion.ac.il (aerodyne.technion.ac.il [132.68.147.2]) by els.sgi.com (8.12.10/8.12.2/els-2.2) with ESMTP id h9FI2oCx5867485 for ; Wed, 15 Oct 2003 11:02:51 -0700 (PDT) Received: from [132.68.147.9] ([132.68.147.9]) by aerodyne.technion.ac.il (8.12.9/8.12.8) with ESMTP id h9FI03m0088854 for ; Wed, 15 Oct 2003 20:00:03 +0200 Date: Wed, 15 Oct 2003 19:59:21 +0200 (IST) From: Yakov Mindelis X-X-Sender: jack@aeone.technion.ac.il To: info-volumizer@els.sgi.com Subject: [info-volumizer] vzShapeSet + vzClipRenderAction problems In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-info-volumizer@els.sgi.com Precedence: bulk Reply-To: info-volumizer@els.sgi.com Hi all, I'm trying to use vzShapeSet + vzClipRenderAction and I must be doing something nasty although I can't see what. Even trying to follow the things with cvd doesn't help and the debuggers shouts "bugger off" as follows :-( : Lost contact with the Process Control Server. Please check in /usr/tmp... The code appears at the end and the problem occurs on the line: shapeSet->add(shape1); Thanks in advance. Jack. // C / C++ #include #include #include #include // OpenGL / GLUT #include #include // IFL #include // Volumizer2 #include #include #include #include #include #include #include #include #include // Projected tetrahedra Render Action... #include #include #include // Global variables vzParameterLookupTable *createLUT(float* data, float r, float g, float b, float a); bool drawcells = false; vzShape *shape1 = NULL; vzShape *shape2 = NULL; vzShapeSet *shapeSet = NULL; vzPTRenderAction *renderAction1 = NULL; vzPTRenderAction *renderAction2 = NULL; vzClipRenderAction *renderAction = NULL; GLint viewport[4]; int lastPosition[2] = {0, 0}; float angles[2] = {0, 0}, lastAngles[2] = {0, 0}; //////////////////////// Volumizer ////////////////////////////// // Load the volume data and initialize the shape node. void loadVolumeData(char *fileName) { // Print the volumizer version string cerr<computeBoundingBox (bbox1); vertexArray2->computeBoundingBox (bbox2); printf("bbox:\n%f %f %f, %f %f %f\n", bbox1[0], bbox1[1], bbox1[2], bbox1[3], bbox1[4], bbox1[5]); printf("bbox:\n%f %f %f, %f %f %f\n", bbox2[0], bbox2[1], bbox2[2], bbox2[3], bbox2[4], bbox2[5]); vzParameterVertexData *volume1 = new vzParameterVertexData ( 8, 1, &data1[0]); vzParameterVertexData *volume2 = new vzParameterVertexData ( 8, 1, &data2[0]); vzParameterLookupTable *lut1 = createLUT(&lutdatargba1[0], 1, 0, 0, 0.5); vzParameterLookupTable *lut2 = createLUT(&lutdatargba2[0], 0, 1, 0, 0.5); // Initialize appearance vzPTLUTShader *shader1 = new vzPTLUTShader(); vzAppearance *appearance1 = new vzAppearance(shader1); vzPTLUTShader *shader2 = new vzPTLUTShader(); vzAppearance *appearance2 = new vzAppearance(shader2); shader1->unref(); shader2->unref(); appearance1->setParameter("vertex_data", volume1); appearance1->setParameter("lookup_table", lut1); appearance2->setParameter("vertex_data", volume2); appearance2->setParameter("lookup_table", lut2); volume1->unref(); volume2->unref(); lut1->unref(); lut2->unref(); // Initialize shape node shape1 = new vzShape(geometry1, appearance1); shape2 = new vzShape(geometry2, appearance2); geometry1->unref(); appearance1->unref(); geometry2->unref(); appearance2->unref(); // Initialize the render action printf("adding shapes\n"); shapeSet->add(shape1); printf("added 1-st shape\n"); shapeSet->add(shape2); printf("added 2-nd shape\n"); shape1->unref(); shape2->unref(); renderAction = new vzClipRenderAction(); renderAction->setLODThreshold(1.0); } // Draw the volume data void clipRenderVolumeData() { renderAction->beginDraw(0); renderAction->draw(shapeSet); renderAction->endDraw(); } // Clean up the shape node and the render action void cleanup() { delete renderAction; } /////////////////////// GLUT callback functions/////////////////// // glutDisplayFunc() callback function void display() { glClear(GL_COLOR_BUFFER_BIT); glDisable(GL_DEPTH_TEST); // Viewport glViewport(viewport[0], viewport[1], viewport[2], viewport[3]); // Projection matrix glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-1, 1, -1, 1, -1, 1); // Modelview matrix glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glRotated( 90 + angles[1], 1, 0, 0); glRotated(180 + angles[0], 0, 0, 1); glScalef(1.5, 1.5, 1.5); glTranslatef(- 0.5, - 0.5, - 0.5); // Enable back-to-front alpha blending glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Render the volume data clipRenderVolumeData(); glutSwapBuffers(); } // glutKeyboardFunc() callback function void keyboard(unsigned char key, int x, int y) { switch (key) { case 27: cleanup(); exit(0); } } // glutReshapeFunc() callback function void reshape(int width, int height) { // Update viewport viewport[0] = 0; viewport[1] = 0; viewport[2] = width; viewport[3] = height; glutPostRedisplay(); } // glutMouseFunc() callback function void mouse(int button, int state, int x, int y) { if (state == GLUT_DOWN) { lastPosition[0] = x; lastPosition[1] = y; lastAngles[0] = angles[0]; lastAngles[1] = angles[1]; } } // glutMotionFunc() callback function void motion(int x, int y) { angles[0] = lastAngles[0] + (lastPosition[0] - x) / 4.0; angles[1] = lastAngles[1] + (y - lastPosition[1]) / 4.0; glutPostRedisplay(); } // main void main(int argc, char *argv[]) { if(argc >2) { cerr<<"Usage: "< draw cells, flag=0[default] -> draw boundary"<