/// <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)
{
TransformStateBase transformState = (TransformStateBase)sceneCtx.GraphicsStateStack.Current[TransformStateBase.StateSetIndex];
LightsState.LightSpot light = new LightsState.LightSpot();
SetLightParameters(sceneCtx, light);
IModelMatrix worldModel = transformState.LocalModelView;
IMatrix3x3 normalMatrix = worldModel.GetComplementMatrix(3, 3).GetInverseMatrix().Transpose();
light.Direction = ((Vertex3f)normalMatrix.Multiply((Vertex3f)Direction)).Normalized;
light.Position = (Vertex3f)worldModel.Multiply(Vertex3f.Zero);
light.AttenuationFactors = AttenuationFactors;
light.FallOff = new Vertex2f((float)Math.Cos(Angle.ToRadians(FalloffAngle)), FalloffExponent);
// Shadow mapping
if (_ShadowMap != null && _ShadowViewMatrix != null)
{
// Determined later: light.ShadowMapIndex
light.ShadowMapMvp.Set(_ShadowViewMatrix);
light.ShadowMap2D = _ShadowMap;
}
else
{
light.ShadowMapIndex = -1;
light.ShadowMap2D = null;
}
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(GraphicsContext ctx, SceneGraphContext sceneCtx)
{
LightsState.LightDirectional light = new LightsState.LightDirectional();
SetLightParameters(sceneCtx, light);
TransformStateBase transformState = (TransformStateBase)sceneCtx.GraphicsStateStack.Current[TransformStateBase.StateSetIndex];
IMatrix3x3 normalMatrix = transformState.NormalMatrix;
light.Direction = ((Vertex3f)normalMatrix.Multiply((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);
}
