/// <summary>
/// Create the corresponding <see cref="LightsState.Light"/> for this object.
/// </summary>
/// <returns>
/// It returns the <see cref="LightsState.Light"/> equivalent to this SceneObjectLight.
/// </returns>
public override LightsState.Light ToLight(GraphicsContext ctx, SceneGraphContext sceneCtx)
{
LightsState.LightDirectional light = new LightsState.LightDirectional();
SetLightParameters(sceneCtx, light);
TransformState transformState = (TransformState)sceneCtx.GraphicsStateStack.Current[TransformState.StateSetIndex];
Matrix3x3f normalMatrix = transformState.NormalMatrix;
light.Direction = (normalMatrix * (Vertex3f)Direction).Normalized;
light.HalfVector = (Vertex3f.UnitZ + light.Direction).Normalized;
return(light);
}
/// <summary>
/// Create the corresponding <see cref="LightsState.Light"/> for this object.
/// </summary>
/// <returns>
/// It returns the <see cref="LightsState.Light"/> equivalent to this SceneObjectLight.
/// </returns>
public override LightsState.Light ToLight(SceneGraphContext sceneCtx)
{
LightsState.LightDirectional light = new LightsState.LightDirectional();
SetLightParameters(sceneCtx, light);
// Note: avoiding to invert the view matrix twice
IMatrix3x3 normalMatrix = sceneCtx.CurrentView.LocalModel.GetComplementMatrix(3, 3).Transpose();
light.Direction = ((Vertex3f)normalMatrix.Multiply((Vertex3f)Direction)).Normalized;
light.HalfVector = (Vertex3f.UnitZ + light.Direction).Normalized;
return(light);
}
