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Small fixes and some comments.

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This commit is contained in:
David Williams
2009-03-18 23:13:34 +00:00
parent 74292f7a62
commit 1dcec5bd3b
3 changed files with 34 additions and 23 deletions
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21
examples/OpenGL/OpenGLVertexBufferObjectSupport.cpp
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@ -6,20 +6,27 @@
using namespace PolyVox;
using namespace std;
OpenGLSurfacePatch BuildOpenGLSurfacePatch(IndexedSurfacePatch& isp)
OpenGLSurfacePatch BuildOpenGLSurfacePatch(const IndexedSurfacePatch& isp)
{
//Represents our filled in OpenGL vertex and index buffer objects.
OpenGLSurfacePatch result;
//Convienient access to the vertices and indices
const vector<SurfaceVertex>& vecVertices = isp.getVertices();
const vector<uint32>& vecIndices = isp.getIndices();
glGenBuffers(1, &result.indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, result.indexBuffer);
int s = vecIndices.size() * sizeof(GLint);
if(s != 0)
//If we have any indices...
if(!vecIndices.empty())
{
GLvoid* blah = (GLvoid*)(&(vecIndices[0]));
glBufferData(GL_ELEMENT_ARRAY_BUFFER, s, blah, GL_STATIC_DRAW);
//Create an OpenGL index buffer
glGenBuffers(1, &result.indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, result.indexBuffer);
//Get a pointer to the first index
GLvoid* pIndices = (GLvoid*)(&(vecIndices[0]));
//Fill the OpenGL index buffer with our data.
glBufferData(GL_ELEMENT_ARRAY_BUFFER, vecIndices.size() * sizeof(uint32), pIndices, GL_STATIC_DRAW);
}
result.noOfIndices = vecIndices.size();