gistfile1.txt

private int GenerateImageVertices()
{
	// Generate vertex positions
	uint halfWidth = Image.GetResolution().X / 2;
	uint halfHeight = Image.GetResolution().Y / 2;

	/*
	Vector2 upLeft = new Vector2(-halfWidth, halfHeight);
	Vector2 upRight = new Vector2(halfWidth, halfHeight);
	Vector2 downLeft = new Vector2(-halfWidth, -halfHeight);
	Vector2 downRight = new Vector2(halfWidth, -halfHeight);
	*/

	Vector2 upLeft = new Vector2(-1, 1);
	Vector2 upRight = new Vector2(1, 1);
	Vector2 downLeft = new Vector2(-1, -1);
	Vector2 downRight = new Vector2(1, -1);

	this.vertexPositions.Clear();
	this.vertexPositions.Add(upLeft);
	this.vertexPositions.Add(upRight);
	this.vertexPositions.Add(downLeft);
	this.vertexPositions.Add(downRight);

	// Buffer the generated vertices in the GPU
	int bufferID;
	GL.GenBuffers(1, out bufferID);

	float[] vertices = GetVerticesAsArray();
	GL.BindBuffer(BufferTarget.ArrayBuffer, bufferID);
	GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(vertices.Length * sizeof(float)), vertices, BufferUsageHint.StaticDraw);


	// Generate vertex indices
	List<ushort> vertexIndices = new List<ushort> {1, 0, 2, 2, 3, 1};
	GL.GenBuffers(1, out this.VertexIndexBufferID);
	GL.BindBuffer(BufferTarget.ElementArrayBuffer, this.VertexIndexBufferID);
	GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(vertexIndices.Count * sizeof(ushort)), vertexIndices.ToArray(), BufferUsageHint.StaticDraw);

	return bufferID;
}