/// <summary>
/// copies points into the VBOs. returns number of points that were copied
/// </summary>
/// <param name="nbrPts"></param>
/// <param name="vertices"></param>
/// <param name="normals"></param>
/// <param name="colors"></param>
/// <param name="serverBufferIds"></param>
/// <returns></returns>
unsafe public static void CopyPointsToVBOs(float[] interleavedData, VBOStorageInformation serverBufferIds)
{
//create and initialize vertexbuffer
Gl.glBindBuffer(Gl.GL_ARRAY_BUFFER, serverBufferIds.InterleavedVBO);
VBOUtils.CheckGlError("Tried first binding of interleaved VBO during glBegin() and glEnd()");
long bytesCopied = 0;
int size = 0;
fixed(float *vptr = interleavedData)
{
size = (sizeof(float) * interleavedData.Length);
bytesCopied += size;
Gl.glBufferData(Gl.GL_ARRAY_BUFFER, (IntPtr)size, (IntPtr)vptr, Gl.GL_STATIC_DRAW);
}
VBOUtils.CheckGlError("Error copying interleaved data to VBO");
LasMetrics.GetInstance().bytesTransferedToGPU += bytesCopied;
LasMetrics.GetInstance().numberOfPointsLoadedIntoExistingVBOs += serverBufferIds.NumberOfPoints;
}
unsafe public static VBOStorageInformation GenerateVBOs(int numberOfPoints)
{
//generate free buffer names for 3 different buffers
int bufferId = 0;
Gl.glGenBuffers(1, out bufferId);
VBOUtils.CheckGlError("Tried first binding of VBO during glBegin() and glEnd()");
if (bufferId == 0)
{
throw new ApplicationException("ID of VBO should be set but was not!!!");
}
VBOStorageInformation vboSI = new VBOStorageInformation();
vboSI.InterleavedVBO = bufferId;
vboSI.NumberOfPoints = numberOfPoints;
LasMetrics.GetInstance().numberOfExistingVBOs++;
return(vboSI);
}
