Method createGarbageQuadMesh

tutorials/common/scenegraph/geometry_creation.cpp:484–521

  }

  Ref<SceneGraph::Node> SceneGraph::createGarbageQuadMesh (int hash, size_t numQuads, bool mblur, Ref<MaterialNode> material)
  {
    RandomSampler sampler;
    RandomSampler_init(sampler,hash);
    Ref<SceneGraph::QuadMeshNode> mesh = new SceneGraph::QuadMeshNode(material,BBox1f(0,1),mblur?2:1);

    mesh->quads.resize(numQuads);
    for (size_t i=0; i<numQuads; i++) {
      const unsigned v0 = (RandomSampler_getInt(sampler) % 32 == 0) ? RandomSampler_getUInt(sampler) : unsigned(4*i+0);
      const unsigned v1 = (RandomSampler_getInt(sampler) % 32 == 0) ? RandomSampler_getUInt(sampler) : unsigned(4*i+1);
      const unsigned v2 = (RandomSampler_getInt(sampler) % 32 == 0) ? RandomSampler_getUInt(sampler) : unsigned(4*i+2);
      const unsigned v3 = (RandomSampler_getInt(sampler) % 32 == 0) ? RandomSampler_getUInt(sampler) : unsigned(4*i+3);
      mesh->quads[i] = QuadMeshNode::Quad(v0,v1,v2,v3);
    }

    mesh->positions[0].resize(4*numQuads);
    for (size_t i=0; i<4*numQuads; i++) {
      const float x = cast_i2f(RandomSampler_getUInt(sampler));
      const float y = cast_i2f(RandomSampler_getUInt(sampler));
      const float z = cast_i2f(RandomSampler_getUInt(sampler));
      const float w = cast_i2f(RandomSampler_getUInt(sampler));
      mesh->positions[0][i] = Vec3fa(Vec3ff(x,y,z,w));
    }

    if (mblur) 
    {
      mesh->positions[1].resize(4*numQuads);
      for (size_t i=0; i<4*numQuads; i++) {
        const float x = cast_i2f(RandomSampler_getUInt(sampler));
        const float y = cast_i2f(RandomSampler_getUInt(sampler));
        const float z = cast_i2f(RandomSampler_getUInt(sampler));
        const float w = cast_i2f(RandomSampler_getUInt(sampler));
        mesh->positions[1][i] = Vec3fa(Vec3ff(x,y,z,w));
      }
    }

    return mesh.dynamicCast<SceneGraph::Node>();
  }

  Ref<SceneGraph::Node> SceneGraph::createGarbageGridMesh (int hash, size_t numGrids, bool mblur, Ref<MaterialNode> material)
  {