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Updated basic example and associated documentation.

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This commit is contained in:
David Williams
2010-08-21 11:55:15 +00:00
parent fdf21f7846
commit 6d58348297
3 changed files with 20 additions and 53 deletions
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18
examples/Basic/OpenGLWidget.cpp
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@ -14,30 +14,24 @@ OpenGLWidget::OpenGLWidget(QWidget *parent)
void OpenGLWidget::setSurfaceMeshToRender(const PolyVox::SurfaceMesh& surfaceMesh)
{
//Sanity check that we have something to render.
if(surfaceMesh.getVertices().empty() || surfaceMesh.getIndices().empty())
{
return;
}
//Convienient access to the vertices and indices
vector<uint32_t>& vecIndices = const_cast<vector<uint32_t>&>(surfaceMesh.getIndices());
vector<SurfaceVertex>& vecVertices = const_cast<vector<SurfaceVertex>&>(surfaceMesh.getVertices());
const vector<uint32_t>& vecIndices = surfaceMesh.getIndices();
const vector<SurfaceVertex>& vecVertices = surfaceMesh.getVertices();
//Build an OpenGL index buffer
glGenBuffers(1, &indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuffer);
GLvoid* pIndices = static_cast<GLvoid*>(&(vecIndices[0]));
const GLvoid* pIndices = static_cast<const GLvoid*>(&(vecIndices[0]));
glBufferData(GL_ELEMENT_ARRAY_BUFFER, vecIndices.size() * sizeof(uint32_t), pIndices, GL_STATIC_DRAW);
//Build an OpenGL vertex buffer
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
GLvoid* pVertices = static_cast<GLvoid*>(&(vecVertices[0]));
const GLvoid* pVertices = static_cast<const GLvoid*>(&(vecVertices[0]));
glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(SurfaceVertex), pVertices, GL_STATIC_DRAW);
m_uBeginIndex = surfaceMesh.m_vecLodRecords[0].beginIndex;
m_uEndIndex = surfaceMesh.m_vecLodRecords[0].endIndex;
m_uBeginIndex = 0;
m_uEndIndex = vecIndices.size();
}
void OpenGLWidget::initializeGL()

25
examples/Basic/main.cpp
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@ -33,7 +33,7 @@ freely, subject to the following restrictions:
//Use the PolyVox namespace
using namespace PolyVox;
void createSphereInVolume(Volume<MaterialDensityPair44>& volData, float fRadius, uint8_t uValue)
void createSphereInVolume(Volume<MaterialDensityPair44>& volData, float fRadius)
{
//This vector hold the position of the center of the volume
Vector3DFloat v3dVolCenter(volData.getWidth() / 2, volData.getHeight() / 2, volData.getDepth() / 2);
@ -50,20 +50,21 @@ void createSphereInVolume(Volume<MaterialDensityPair44>& volData, float fRadius,
//And compute how far the current position is from the center of the volume
float fDistToCenter = (v3dCurrentPos - v3dVolCenter).length();
//Default to values representing empty space.
uint8_t uMaterial = 0;
uint8_t uDensity = MaterialDensityPair44::getMinDensity();
//If the current voxel is less than 'radius' units from the center then we make it solid.
if(fDistToCenter <= fRadius)
{
uMaterial = 1;
uDensity = MaterialDensityPair44::getMaxDensity();
}
//Our new density value
uint8_t uDensity = MaterialDensityPair44::getMaxDensity();
//Wrte the voxel value into the volume
MaterialDensityPair44 voxel(uMaterial, uDensity);
volData.setVoxelAt(x, y, z, voxel);
//Get the old voxel
MaterialDensityPair44 voxel = volData.getVoxelAt(x,y,z);
//Modify the density
voxel.setDensity(uDensity);
//Wrte the voxel value into the volume
volData.setVoxelAt(x, y, z, voxel);
}
}
}
}
@ -78,7 +79,7 @@ int main(int argc, char *argv[])
//Create an empty volume and then place a sphere in it
Volume<MaterialDensityPair44> volData(64, 64, 64);
createSphereInVolume(volData, 30, 1);
createSphereInVolume(volData, 30);
//Extract the surface
SurfaceExtractor<MaterialDensityPair44> surfaceExtractor(volData);