public void Draw(Texture2D texture, ref Matrix transform, FloatRect? sourceRectangle = null, Color? color=null, Vector3? normal = null)
{
Vertex3CTN vtx;
vtx.Color = color ?? Color.White;
vtx.Normal = normal ?? Vector3.Forward;
FloatRect texRect = sourceRectangle ?? new FloatRect(texture.Bounds);
Vector2 texCoordLT = texture.GetUV(texRect.Left, texRect.Top);
Vector2 texCoordBR = texture.GetUV(texRect.Right, texRect.Bottom);
vtx.Position = Vector3.Zero;
vtx.TextureCoords = texCoordLT;
_quadVertices[0] = vtx;
vtx.Position = new Vector3(0, texRect.Height, 0);
vtx.TextureCoords = new Vector2(texCoordLT.X, texCoordBR.Y);
_quadVertices[1] = vtx;
vtx.Position = new Vector3(texRect.Width, 0, 0);
vtx.TextureCoords = new Vector2(texCoordBR.X, texCoordLT.Y);
_quadVertices[2] = vtx;
vtx.Position = new Vector3(texRect.Width, texRect.Height, 0);
vtx.TextureCoords = texCoordBR;
_quadVertices[3] = vtx;
DrawVertices(texture, _quadVertices, _quadIndices, ref transform);
}
