func (buffer *vertexBuffer) loadVolatile() bool {
buffer.vbo = gl.CreateBuffer()
buffer.bind()
defer buffer.unbind()
gl.BufferData(gl.ARRAY_BUFFER, len(buffer.data)*4, gl.Ptr(buffer.data), uint32(buffer.usage))
return true
}
func (buffer *vertexBuffer) bufferStream() {
// "orphan" current buffer to avoid implicit synchronisation on the GPU:
// http://www.seas.upenn.edu/~pcozzi/OpenGLInsights/OpenGLInsights-AsynchronousBufferTransfers.pdf
gl.BufferData(gl.ARRAY_BUFFER, len(buffer.data)*4, gl.Ptr(nil), uint32(buffer.usage))
gl.BufferData(gl.ARRAY_BUFFER, len(buffer.data)*4, gl.Ptr(buffer.data), uint32(buffer.usage))
}