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Has anyone who is not in Manta-auth tried to build this stuff? We should add a new private/scenes directory...

On Jul 19, 2007, at 11:40 AM, cgribble@sci.utah.edu wrote:

Author: cgribble
Date: Thu Jul 19 11:40:32 2007
New Revision: 1510

Added:
   trunk/scenes/pcgt.cc
Modified:
   trunk/scenes/CMakeLists.txt
Log:
Added scene for using Particle CGT algorithm with particle NRRDs; more general than particleCGTTest.cc, will eventually support the same features as pnrrd.cc (using PCGT rather than GridSpheres)

Modified: trunk/scenes/CMakeLists.txt
====================================================================== ========
--- trunk/scenes/CMakeLists.txt (original)
+++ trunk/scenes/CMakeLists.txt Thu Jul 19 11:40:32 2007
@@ -54,6 +54,12 @@
    TARGET_LINK_LIBRARIES(scene_ParticleBVHTest ${MANTA_SCENE_LINK})
 ENDIF(SCENE_PARTICLEBVHTEST)

+SET(SCENE_PARTICLECGTTEST 0 CACHE BOOL "Particle Coherent Grid Traversal Test")
+IF(SCENE_PARTICLECGTTEST)
+   ADD_LIBRARY(scene_particleCGTTest particleCGTTest.cc)
+   TARGET_LINK_LIBRARIES(scene_particleCGTTest ${MANTA_SCENE_LINK})
+ENDIF(SCENE_PARTICLECGTTEST)
+
 # Boeing 777 Test Scene.
 SET(SCENE_BOEING777 0 CACHE BOOL "Boeing 777 Test Scene")
 IF(SCENE_BOEING777)
@@ -114,19 +120,17 @@
    TARGET_LINK_LIBRARIES(scene_pnrrd ${MANTA_SCENE_LINK})
 ENDIF(BUILD_NRRDPARTICLES)

+# Viewer for NRRD particle datasets using PCGT algorithm
+IF(BUILD_NRRDPARTICLES)
+   ADD_LIBRARY(scene_pcgt pcgt.cc)
+   TARGET_LINK_LIBRARIES(scene_pcgt ${MANTA_SCENE_LINK})
+ENDIF(BUILD_NRRDPARTICLES)
+
 # Lazily evaluated LTs for NRRD particle datasets
 IF(BUILD_DYNLT)
    ADD_LIBRARY(scene_dynlt dynlt.cc)
    TARGET_LINK_LIBRARIES(scene_dynlt Manta_DynLT ${MANTA_SCENE_LINK})
 ENDIF(BUILD_DYNLT)
-
-# Test different primitives.
-SET(SCENE_PARTICLE_CGT 0 CACHE BOOL "Test scene for particle Coherent Grid Traversal")
-IF(SCENE_PARTICLE_CGT)
-   ADD_LIBRARY(scene_particleCGTTest particleCGTTest.cc)
-   TARGET_LINK_LIBRARIES(scene_particleCGTTest ${MANTA_SCENE_LINK})
-ENDIF(SCENE_PARTICLE_CGT)
-

 # Recurse into galileo directory
 SUBDIRS(galileo)

Added: trunk/scenes/pcgt.cc
====================================================================== ========
--- (empty file)
+++ trunk/scenes/pcgt.cc        Thu Jul 19 11:40:32 2007
@@ -0,0 +1,126 @@
+
+#include <Core/Color/RegularColorMap.h>
+#include <Core/Exceptions/IllegalArgument.h>
+#include <Core/Geometry/Vector.h>
+#include <Core/Util/Args.h>
+#include <Interface/Context.h>
+#include <Interface/LightSet.h>
+#include <Interface/MantaInterface.h>
+#include <Interface/Scene.h>
+#include <Model/AmbientLights/ConstantAmbient.h>
+#include <Model/Backgrounds/ConstantBackground.h>
+#include <Model/Backgrounds/EnvMapBackground.h>
+#include <Model/Groups/TimeSteppedParticles.h>
+#include <Model/Lights/PointLight.h>
+#include <Model/Materials/Lambertian.h>
+#include <Model/Primitives/GridSpheres.h>
+#include <Model/Primitives/Sphere.h>
+#include <Model/Readers/ParticleNRRD.h>
+#include <Model/Groups/private/ParticleCGT.h>
+
+#include <sgi_stl_warnings_off.h>
+#include <iostream>
+#include <sgi_stl_warnings_on.h>
+
+using namespace Manta;
+using namespace std;
+
+extern "C"
+Scene* make_scene(ReadContext const& context, vector<string> const& args)
+{
+  int argc = static_cast<int>(args.size());
+  int cidx = 0;
+  string env_fname = "";
+  string fname = "";
+  double radius = 1.;
+  int ridx = -1;
+  double lx = 10.;
+  double ly = 10.;
+  double lz = 10.;
+
+  for(int i = 0; i < argc; ++i) {
+    string arg = args[i];
+    if (arg == "-cidx") {
+      if (!getIntArg(i, args, cidx))
+        throw IllegalArgument("scene pcgt -cidx", i, args);
+    } else if (arg == "-envmap") {
+      if (!getStringArg(i, args, env_fname))
+        throw IllegalArgument("scene pcgt -envmap", i, args);
+    } else if (arg == "-i") {
+      if (!getStringArg(i, args, fname))
+        throw IllegalArgument("scene pcgt -i", i, args);
+    } else if (arg == "-light") {
+      if (!getDoubleArg(i, args, lx))
+        throw IllegalArgument("scene pcgt -light", i, args);
+      if (!getDoubleArg(i, args, ly))
+        throw IllegalArgument("scene pcgt -light", i, args);
+      if (!getDoubleArg(i, args, lz))
+        throw IllegalArgument("scene pcgt -light", i, args);
+    } else if (arg == "-radius") {
+      if (!getDoubleArg(i, args, radius))
+        throw IllegalArgument("scene pcgt -radius", i, args);
+    } else if (arg == "-ridx") {
+      if (!getIntArg(i, args, ridx))
+        throw IllegalArgument("scene pcgt -ridx", i, args);
+    } else {
+      cerr<<"Valid options for scene pcgt:\n";
+ cerr<<" -cidx <int> data value index for color mapping\n";
+      cerr<<"  -envmap <string>   environment map filename\n";
+      cerr<<"  -ncells <int>      grid resolution\n";
+      cerr<<"  -i <string>        filename\n";
+      cerr<<"  -radius <float>    particle radius\n";
+      cerr<<"  -ridx <int>        radius index\n";
+      throw IllegalArgument("scene pcgt", i, args);
+    }
+  }
+
+  // Create scene
+  Scene* scene = new Scene();
+
+  // Create color map
+  unsigned int type = RegularColorMap::parseType("InvRainbowIso");
+  RegularColorMap* cmap = new RegularColorMap(type);
+
+  // XXX(cpg) - There are some problems here:
+ // 1. Get bus error without the random, manually added sphere at (0, 0, 0)
+ // 2. I don't understand the scene <- world <- particles <- data mapping.
+ // Why so many layers of groups? It seems to me that ParticleGrid should
+ // be the scene's primary object, unless we're loading multiple time steps
+  //       (see pnrrd.cc).
+  //   3.  Doesn't support variable radii
+  //   3.  Doesn't support run time color mapping
+
+  // ***** begin copy (more or less) from ParticleCGTTest.cc *****
+  Group* world = new Group;
+  Group* particles = new Group;
+
+  Material* material = new Lambertian(Color(RGB(1, 0, 0)));
+  ParticleNRRD pnrrd(fname);
+  unsigned int nvars = pnrrd.getNVars();
+  for (unsigned int i = 0; i < pnrrd.getNParticles(); i++) {
+    float* data = pnrrd.getParticleData() + i*nvars;
+    Vector position(data[0], data[1], data[2]);
+    particles->add(new Sphere(material, position, radius));
+  }
+
+  ParticleGrid* grid = new ParticleGrid;
+  grid->rebuild(particles);
+  world->add(grid);
+  world->add(new Sphere(material, Vector(0,0,0), radius));
+  scene->setObject(world);
+  // ***** end copy *****
+
+  // Set background
+  if (env_fname != "")
+    scene->setBackground(new EnvMapBackground(env_fname));
+  else
+ scene->setBackground(new ConstantBackground(Color(RGB(0, 0, 0))));
+
+  // Add lights
+  LightSet* lights=new LightSet();
+ lights->add(new PointLight(Vector(lx, ly, lz), Color(RGB(1, 1, 1))));
+ lights->setAmbientLight(new ConstantAmbient(Color(RGB(0.4, 0.4, 0.4))));
+  scene->setLights(lights);
+
+  return scene;
+}

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• [MANTA] r1510 - trunk/scenes, cgribble, 07/19/2007
  • Re: [MANTA] r1510 - trunk/scenes, Solomon Boulos, 07/19/2007
    • Re: [MANTA] r1510 - trunk/scenes, Thiago Ize, 07/19/2007
      • Re: [MANTA] r1510 - trunk/scenes, Christiaan Paul Gribble, 07/19/2007
        • Re: [MANTA] r1510 - trunk/scenes, Thiago Ize, 07/19/2007
          • Re: [MANTA] r1510 - trunk/scenes, James Bigler, 07/19/2007
      • Re: [MANTA] r1510 - trunk/scenes, Abe Stephens, 07/19/2007
        • Re: [MANTA] r1510 - trunk/scenes, Thiago Ize, 07/19/2007

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