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Work on new OpenGL example - Splitting into several files.

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This commit is contained in:
David Williams
2009-03-18 21:10:51 +00:00
parent a50bb8413e
commit bd5acdb4cd
8 changed files with 229 additions and 190 deletions
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98
examples/OpenGL/OpenGLVertexBufferObjectSupport.cpp Normal file
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#include "OpenGLVertexBufferObjectSupport.h"
#include "PolyVoxCore/IndexedSurfacePatch.h"
using namespace PolyVox;
using namespace std;
OpenGLSurfacePatch BuildOpenGLSurfacePatch(IndexedSurfacePatch& isp)
{
OpenGLSurfacePatch result;
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)
{
GLvoid* blah = (GLvoid*)(&(vecIndices[0]));
glBufferData(GL_ELEMENT_ARRAY_BUFFER, s, blah, GL_STATIC_DRAW);
}
result.noOfIndices = vecIndices.size();
glGenBuffers(1, &result.vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, result.vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vecVertices.size() * sizeof(GLfloat) * 9, 0, GL_STATIC_DRAW);
GLfloat* ptr = (GLfloat*)glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE);
for(vector<SurfaceVertex>::const_iterator iterVertex = vecVertices.begin(); iterVertex != vecVertices.end(); ++iterVertex)
{
const SurfaceVertex& vertex = *iterVertex;
const Vector3DFloat& v3dVertexPos = vertex.getPosition();
//const Vector3DFloat v3dRegionOffset(uRegionX * g_uRegionSideLength, uRegionY * g_uRegionSideLength, uRegionZ * g_uRegionSideLength);
const Vector3DFloat v3dFinalVertexPos = v3dVertexPos + static_cast<Vector3DFloat>(isp.m_v3dRegionPosition);
*ptr = v3dFinalVertexPos.getX();
ptr++;
*ptr = v3dFinalVertexPos.getY();
ptr++;
*ptr = v3dFinalVertexPos.getZ();
ptr++;
*ptr = vertex.getNormal().getX();
ptr++;
*ptr = vertex.getNormal().getY();
ptr++;
*ptr = vertex.getNormal().getZ();
ptr++;
GLfloat red = 0.0f;
GLfloat green = 0.0f;
GLfloat blue = 0.0f;
uint8 material = vertex.getMaterial() + 0.5;
switch(material)
{
case 1:
red = 1.0;
green = 0.0;
blue = 0.0;
break;
case 2:
red = 0.0;
green = 1.0;
blue = 0.0;
break;
case 3:
red = 0.0;
green = 0.0;
blue = 1.0;
break;
case 4:
red = 1.0;
green = 1.0;
blue = 0.0;
break;
case 5:
red = 1.0;
green = 0.0;
blue = 1.0;
break;
}
*ptr = red;
ptr++;
*ptr = green;
ptr++;
*ptr = blue;
ptr++;
}
glUnmapBuffer(GL_ARRAY_BUFFER);
return result;
}