Adding transparency support

src/Engine/Material/Material.h

@@ -10,7 +10,7 @@ DECLARE_NAME_REF(Gfx, Sampler)
 class Material {
   public:
     Material();
-    Material(Gfx::PGraphics graphics, uint32 numTextures, uint32 numSamplers, uint32 numFloats,
+    Material(Gfx::PGraphics graphics, uint32 numTextures, uint32 numSamplers, uint32 numFloats, bool twoSided, float opacity,
              std::string materialName, Array<OShaderExpression> expressions, Array<std::string> parameter, MaterialNode brdf);
     ~Material();
     static void init(Gfx::PGraphics graphics);
@@ -23,8 +23,14 @@ class Material {
     static uint32 addTextures(uint32 numTextures);
     static uint32 addSamplers(uint32 numSamplers);
     static uint32 addFloats(uint32 numFloats);
+
     OMaterialInstance instantiate();
     const std::string& getName() const { return materialName; }
+
+    bool isTwoSided() const;
+    bool hasTransparency() const;
+    float getOpacity() const;
+
     constexpr uint64 getId() const { return materialId; }
     static constexpr const PMaterial findMaterialById(uint64 id) { return materials[id]; }
 
@@ -41,6 +47,8 @@ class Material {
     uint64 instanceId;
     uint64 materialId;
     std::string materialName;
+    bool twoSided;
+    float opacity;
     Array<OShaderExpression> codeExpressions;
     Array<std::string> parameters;
     MaterialNode brdf;