Graphics/Material: Add shadow support

The real fun will be in the shader


Former-commit-id: e29e98cbf3c35e4cf14c68852e03dc9da1df0ff1

include/Nazara/Graphics/Material.inl

@@ -38,6 +38,7 @@ inline void NzMaterial::EnableAlphaTest(bool alphaTest)
 
 inline void NzMaterial::EnableDepthSorting(bool depthSorting)
 {
+	// Has no influence on shaders
 	m_depthSortingEnabled = depthSorting;
 }
 
@@ -48,6 +49,19 @@ inline void NzMaterial::EnableLighting(bool lighting)
 	InvalidateShaders();
 }
 
+inline void NzMaterial::EnableShadowCasting(bool castShadows)
+{
+	// Has no influence on shaders
+	m_shadowCastingEnabled = castShadows;
+}
+
+inline void NzMaterial::EnableShadowReceive(bool receiveShadows)
+{
+	m_shadowReceiveEnabled = receiveShadows;
+
+	InvalidateShaders();
+}
+
 inline void NzMaterial::EnableTransform(bool transform)
 {
 	m_transformEnabled = transform;
@@ -226,6 +240,16 @@ inline bool NzMaterial::IsLightingEnabled() const
 	return m_lightingEnabled;
 }
 
+inline bool NzMaterial::IsShadowCastingEnabled() const
+{
+	return m_shadowCastingEnabled;
+}
+
+inline bool NzMaterial::IsShadowReceiveEnabled() const
+{
+	return m_shadowReceiveEnabled;
+}
+
 inline bool NzMaterial::IsTransformEnabled() const
 {
 	return m_transformEnabled;