public void flush()
{
flushNum += 1;
vao.registerAttribute(0, vertBuffer, Vector3.SizeInBytes, 3);
vao.registerAttribute(1, texBuffer, Vector2.SizeInBytes, 2);
vao.bind();
Shader.start();
Matrix4 translationToOrigin = Matrix4.CreateTranslation(-1 * vertBuffer[0].X,
-1 * vertBuffer[0].Y, 0);
Matrix4 scale = Matrix4.CreateScale(2 * Camera.Zoom / (float)Window.Width,
2 * Camera.Zoom / (float)Window.Height, 1);
Matrix4 translationToFinalSpot = Matrix4.CreateTranslation(2 * Camera.Zoom * (vertBuffer[0].X - Camera.Position.X - Window.Width / 2) / Window.Width,
2 * Camera.Zoom * (vertBuffer[0].Y - Camera.Position.Y - Window.Height / 2) / Window.Height, 0);
Matrix4 world = Matrix4.Mult(translationToOrigin, scale);
world = Matrix4.Mult(world, translationToFinalSpot);
Shader.loadWorldRef(world);
GL.BindTexture(TextureTarget.Texture2D, tex);
GL.DrawArrays(PrimitiveType.Quads, 0, idx);
Shader.stop();
vao.unbind();
idx = 0;
}
public override void end()
{
vao.unbind();
Shader.stop();
}