public void DrawPrimitives(PrimitiveType primitiveType, int vertexStart, int primitiveCount)
{
int elementCountArray = GraphicsDevice.GetElementCountArray(primitiveType, primitiveCount);
this.ApplyState(true);
this._vertexBuffer.VertexDeclaration.Apply(this._vertexShader, IntPtr.Zero);
GL.DrawArrays(GraphicsDevice.PrimitiveTypeGL(primitiveType), vertexStart, elementCountArray);
}
public void DrawIndexedPrimitives(PrimitiveType primitiveType, int baseVertex, int minVertexIndex, int numVertices, int startIndex, int primitiveCount)
{
this.ApplyState(true);
bool flag = this._indexBuffer.IndexElementSize == IndexElementSize.SixteenBits;
DrawElementsType type = flag ? DrawElementsType.UnsignedShort : DrawElementsType.UnsignedInt;
int num = flag ? 2 : 4;
IntPtr indices = (IntPtr)(startIndex * num);
int elementCountArray = GraphicsDevice.GetElementCountArray(primitiveType, primitiveCount);
BeginMode mode = GraphicsDevice.PrimitiveTypeGL(primitiveType);
this._vertexBuffer.VertexDeclaration.Apply(this._vertexShader, (IntPtr)(this._vertexBuffer.VertexDeclaration.VertexStride * baseVertex));
GL.DrawElements(mode, elementCountArray, type, indices);
}
public void DrawUserPrimitives <T>(PrimitiveType primitiveType, T[] vertexData, int vertexOffset, int primitiveCount, VertexDeclaration vertexDeclaration) where T : struct, IVertexType
{
int elementCountArray = GraphicsDevice.GetElementCountArray(primitiveType, primitiveCount);
this.ApplyState(true);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
this._vertexBufferDirty = this._indexBufferDirty = true;
GCHandle gcHandle = GCHandle.Alloc((object)vertexData, GCHandleType.Pinned);
vertexDeclaration.GraphicsDevice = this;
vertexDeclaration.Apply(this._vertexShader, gcHandle.AddrOfPinnedObject());
GL.DrawArrays(GraphicsDevice.PrimitiveTypeGL(primitiveType), vertexOffset, elementCountArray);
gcHandle.Free();
}
public void DrawUserIndexedPrimitives <T>(PrimitiveType primitiveType, T[] vertexData, int vertexOffset, int numVertices, int[] indexData, int indexOffset, int primitiveCount, VertexDeclaration vertexDeclaration) where T : struct, IVertexType
{
this.ApplyState(true);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
this._vertexBufferDirty = this._indexBufferDirty = true;
GCHandle gcHandle1 = GCHandle.Alloc((object)vertexData, GCHandleType.Pinned);
GCHandle gcHandle2 = GCHandle.Alloc((object)indexData, GCHandleType.Pinned);
vertexDeclaration.GraphicsDevice = this;
vertexDeclaration.Apply(this._vertexShader, gcHandle1.AddrOfPinnedObject());
GL.DrawElements(GraphicsDevice.PrimitiveTypeGL(primitiveType), GraphicsDevice.GetElementCountArray(primitiveType, primitiveCount), DrawElementsType.UnsignedInt, (IntPtr)(gcHandle2.AddrOfPinnedObject().ToInt64() + (long)(indexOffset * 4)));
gcHandle2.Free();
gcHandle1.Free();
}
