private void BufferData(Vector3[] coordinates, ushort[] indices)
{
this.glBuffers = new[] { GL.GenVertexArray(), GL.GenBuffer(), GL.GenBuffer() };
GL.BindVertexArray(glBuffers[0]);
GL.BindBuffer(BufferTarget.ArrayBuffer, glBuffers[1]);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, glBuffers[2]);
// assign colours
var colourPallet = new[]
{
selectedAxis.HasFlag(SelectedAxis.U) ? Colours.Selection : Colours.Red,
selectedAxis.HasFlag(SelectedAxis.V) ? Colours.Selection : Colours.Green,
selectedAxis.HasFlag(SelectedAxis.W) ? Colours.Selection : Colours.Blue
};
var colours = colourPallet.SelectMany(x => x.ToFloatRgb()).Concat(colourPallet.SelectMany(x => x.ToFloatRgb()));
var colourCount = coordinates.Length - 6;
var palletDivisor = colourCount / 3;
for (int i = 0; i < colourCount; ++i)
{
var index = (i / palletDivisor) % palletDivisor;
colours = colours.Concat(colourPallet[index].ToFloatRgb());
}
var colourArray = colours.ToArray();
GL.BufferData<ushort>(
BufferTarget.ElementArrayBuffer,
(IntPtr)(sizeof(ushort) * indices.Length),
indices,
BufferUsageHint.StreamDraw);
GL.BufferData(
BufferTarget.ArrayBuffer,
(IntPtr)(Vector3.SizeInBytes * coordinates.Length + sizeof(float) * colourArray.Length),
IntPtr.Zero,
BufferUsageHint.StreamDraw);
BufferPositionData(coordinates);
BufferColourData(Vector3.SizeInBytes * coordinates.Length, colourArray);
GL.VertexAttribPointer(0, 3, VertexAttribPointerType.Float, false, 0, 0);
GL.VertexAttribPointer(1, 3, VertexAttribPointerType.Float, false, 0, (IntPtr)(Vector3.SizeInBytes * coordinates.Length));
GL.EnableVertexAttribArray(0);
GL.EnableVertexAttribArray(1);
GL.BindVertexArray(0);
}
