public override void RenderPrep()
{
LocMatrix = Matrix4x4f.Translated((int)X, (int)Y, 0);
LocMatrix.Scale(Texture.Width * Size / Texture.TileSizeX, Texture.Height * Size / Texture.TileSizeY, 1);
if (flipX)
{
LocMatrix.Scale(-1, 1, 1);
}
if (flipY)
{
LocMatrix.Scale(1, -1, 1);
}
}
// Just the render call and any set-up StringDrawable requires but a regular Drawable doesn't.
public override void UnsafeDraw()
{
if (updateBuffer || updated != Texture.Updated)
{
UpdateBuffer();
}
Gl.DrawArraysInstanced(PrimitiveType.Quads, 0, 4, instances);
if (MultiplePositions)
{
PointF lastOffset = new PointF(0, 0);
foreach (PointF offset in Offsets)
{
LocMatrix.Translate((offset.X - lastOffset.X) * (flipX ? -1 : 1), (offset.Y - lastOffset.Y) * (flipY ? -1 : 1), 0);
Gl.UniformMatrix4f(Texture.Program.ModelLocation, 1, false, LocMatrix);
Gl.DrawArraysInstanced(PrimitiveType.Quads, 0, 4, instances);
lastOffset = offset;
}
}
}
