Now parsing additional alpha modes in KRMaterial

--HG--
extra : convert_revision : svn%3A7752d6cf-9f14-4ad2-affc-04f1e67b81a5/trunk%4070

KREngine/KREngine/Classes/KRMaterial.cpp

@@ -66,7 +66,7 @@ KRMaterial::KRMaterial(const char *szName) : KRResource(szName) {
     m_reflectionMapOffset = KRVector2(0.0f, 0.0f);
     m_reflectionMapScale = KRVector2(1.0f, 1.0f);
     m_reflectionFactor = 0.0f;
-    m_bAlphaTest = false;
+    m_alpha_mode = KRMATERIAL_ALPHA_MODE_OPAQUE;
 }
 
 KRMaterial::~KRMaterial() {
@@ -105,8 +105,19 @@ bool KRMaterial::save(const std::string& path) {
         if(m_reflectionMap.size()) {
             fprintf(f, "map_Reflection %s.pvr -s %f %f -o %f %f\n", m_reflectionMap.c_str(), m_reflectionMapScale.x, m_reflectionMapScale.y, m_reflectionMapOffset.x, m_reflectionMapOffset.y);
         }
-        if(m_bAlphaTest) {
+        switch(m_alpha_mode) {
+            case KRMATERIAL_ALPHA_MODE_OPAQUE:
+                fprintf(f, "alpha_mode opaque");
+                break;
+            case KRMATERIAL_ALPHA_MODE_TEST:
                 fprintf(f, "alpha_mode test");
+                break;
+            case KRMATERIAL_ALPHA_MODE_BLENDONESIDE:
+                fprintf(f, "alpha_mode blendoneside");
+                break;
+            case KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE:
+                fprintf(f, "alpha_mode blendtwoside");
+                break;
         }
         fclose(f);
         return true;
@@ -143,8 +154,8 @@ void KRMaterial::setReflectionMap(std::string texture_name, KRVector2 texture_sc
     m_reflectionMapOffset = texture_offset;
 }
 
-void KRMaterial::setAlphaTest(bool bAlphaTest) {
+void KRMaterial::setAlphaMode(KRMaterial::alpha_mode_type alpha_mode) {
-    m_bAlphaTest = bAlphaTest;
+    m_alpha_mode = alpha_mode;
 }
 
 void KRMaterial::setAmbient(const KRVector3 &c) {
@@ -207,7 +218,7 @@ void KRMaterial::bind(KRMaterial **prevBoundMaterial, char *szPrevShaderKey, KRC
         bool bNormalMap = m_pNormalMap != NULL && pCamera->bEnableNormalMap;
         bool bSpecMap = m_pSpecularMap != NULL && pCamera->bEnableSpecMap;
         bool bReflectionMap = m_pReflectionMap != NULL && pCamera->bEnableReflectionMap;
-        bool bAlphaTest = m_bAlphaTest && bDiffuseMap;
+        bool bAlphaTest = (m_alpha_mode == KRMATERIAL_ALPHA_MODE_TEST) && bDiffuseMap;
         
         KRShader *pShader = pContext->getShaderManager()->getShader("ObjectShader", pCamera, bDiffuseMap, bNormalMap, bSpecMap, cShadowBuffers, bLightMap, m_diffuseMapScale != default_scale && bDiffuseMap, m_specularMapScale != default_scale && bSpecMap, m_normalMapScale != default_scale && bNormalMap, m_diffuseMapOffset != default_offset && bDiffuseMap, m_specularMapOffset != default_offset && bSpecMap, m_normalMapOffset != default_offset && bNormalMap, bAlphaTest, renderPass);
 

KREngine/KREngine/Classes/KRMaterial.h

@@ -55,6 +55,13 @@ class KRContext;
 
 class KRMaterial : public KRResource {
 public:
+    typedef enum {
+        KRMATERIAL_ALPHA_MODE_OPAQUE, // Non-transparent materials
+        KRMATERIAL_ALPHA_MODE_TEST, // Alpha in diffuse texture is interpreted as punch-through when < 0.5
+        KRMATERIAL_ALPHA_MODE_BLENDONESIDE, // Blended alpha with backface culling
+        KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE // Blended alpha rendered in two passes.  First pass renders backfaces; second pass renders frontfaces.
+    } alpha_mode_type;
+    
     KRMaterial(const char *szName);
     ~KRMaterial();
     
@@ -74,7 +81,7 @@ public:
     void setTransparency(GLfloat a);
     void setShininess(GLfloat s);
     void setReflectionFactor(GLfloat r);
-    void setAlphaTest(bool bAlphaTest);
+    void setAlphaMode(alpha_mode_type blend_mode);
     
 
     bool isTransparent();
@@ -85,6 +92,8 @@ public:
     
 #endif
     
+
+    
 private:
     char m_szName[64];
     
@@ -124,7 +133,7 @@ private:
     GLfloat m_ns; // Shininess
     GLfloat m_reflectionFactor; // Level of reflectivity
     
-    bool m_bAlphaTest; // When true, alpha in diffuse texture is interpreted as punch-through when < 0.5
+    alpha_mode_type m_alpha_mode;
 };
 
 #endif

KREngine/KREngine/Classes/KRMaterialManager.cpp

@@ -118,7 +118,15 @@ bool KRMaterialManager::loadFile(const char *szPath) {
                             if(pMaterial != NULL) {
                                 if(strcmp(szSymbol[0], "alpha_mode") == 0) {
                                     if(cSymbols == 2) {
-                                        pMaterial->setAlphaTest(strcmp(szSymbol[1], "test") == 0);
+                                        if(strcmp(szSymbol[1], "test") == 0) {
+                                            pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_TEST);
+                                        } else if(strcmp(szSymbol[1], "blendoneside") == 0) {
+                                            pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDONESIDE);
+                                        } else if(strcmp(szSymbol[1], "blendtwoside") == 0) {
+                                            pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDONESIDE);
+                                        } else {
+                                            pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_OPAQUE);
+                                        }
                                     }
                                 } else if(strcmp(szSymbol[0], "Ka") == 0) {
                                     char *pScan2 = szSymbol[1];