fixed z fighting for GUI elements

gui.vert

@@ -12,6 +12,6 @@ void main(){
 	float x, y;
 	x = (aVert.x + pos.x - screen.x * .5) / (screen.x * .5);
 	y = (screen.y * .5 - (aVert.y + pos.y)) / (screen.y * .5);
-	gl_Position = vec4(x, y, pos.z + aVert.z, 1);
+	gl_Position = vec4(x, y, -(pos.z + aVert.z), 1);
 	texCoords = aTexCoords;
 }

material.h

@@ -160,9 +160,12 @@ namespace vb01{
 			inline void addVec4Uniform(std::string name, Vector4 value){uniforms.push_back(new Vector4Uniform(name, value));}
 			inline void addTexUniform(std::string name, Texture *value, bool animatable){uniforms.push_back(new TextureUniform(name, value, animatable));}
 			inline Shader* getShader(){return shader;}
+			inline bool isTransparent(){return transparent;}
+			inline void setTransparent(bool t){this->transparent = t;}
 		private:
 			std::vector<Uniform*> uniforms;
 			Shader *shader = nullptr;
+			bool transparent = false;
 	};
 }
 

node.h

@@ -49,6 +49,7 @@ namespace vb01{
 			inline Skeleton* getSkeleton(int i){return skeletons[i];}
 			inline int getNumSkeletons(){return skeletons.size();}
 			inline Text* getText(int i){return texts[i];}
+			inline std::vector<Text*>& getTexts(){return texts;}
 			inline std::vector<Mesh*>& getMeshes(){return meshes;}
 			inline std::vector<Skeleton*>& getSkeletons(){return skeletons;}
 			inline Mesh* getMesh(int i){return meshes[i];}

root.cpp

@@ -153,7 +153,7 @@ namespace vb01{
 
 		AnimationController::getSingleton()->update();
 
-		updateNodeTree(rootNode);
+		updateNodeTree(rootNode, false);
 
 		LineRenderer::getSingleton()->drawLines();
 
@@ -167,31 +167,26 @@ namespace vb01{
 		updateGuiPlane();
 
 		glEnable(GL_DEPTH_TEST);
-		updateNodeTree(guiNode);
+		updateNodeTree(guiNode, true);
 
 		glfwSwapBuffers(window);
 		glfwPollEvents();
 	}
 
 	//TODO replace sorting algorithm
-	void Root::updateNodeTree(Node *node){
+	//TODO specify differentiation of nodes with translucent meshes AND texts
+	void Root::updateNodeTree(Node *node, bool gui){
 			vector<Node*> descendants, opaqueNodes, transparentNodes;
 			node->getDescendants(descendants);
 
 			for(Node *desc : descendants){
 				if(!desc->getMeshes().empty())
 					for(Mesh *mesh : desc->getMeshes()){
-								Material *mat = mesh->getMaterial();
+						(mesh->getMaterial()->isTransparent() ? transparentNodes : opaqueNodes).push_back(desc);
-								vector<Material::Uniform*> uniforms = mat->getUniformsByType(Material::Uniform::TEXTURE);
+						break;
-
-								if(!uniforms.empty())
-									for(Material::Uniform *uni : uniforms){
-											bool transparent = ((Material::TextureUniform*)uni)->value->isTransparent();
-											(transparent ? transparentNodes : opaqueNodes).push_back(desc);
-									}
-								else
-										opaqueNodes.push_back(desc);
 					}
+				else if(!desc->getTexts().empty())
+					transparentNodes.push_back(desc);
 				else
 					opaqueNodes.push_back(desc);
 			}
@@ -202,16 +197,24 @@ namespace vb01{
 			int numNodes = transparentNodes.size();
 
 			for(int i = 0; i < numNodes; i++){
+				float d1 = transparentNodes[i]->getPosition().z;
+
+				if(!gui){
 					Vector3 v1 = transparentNodes[i]->getPosition() - camera->getPosition();
 					float a1 = v1.norm().getAngleBetween(camera->getDirection());
-					float d1 = v1.getLength() * cos(a1);
+					d1 = v1.getLength() * cos(a1);
+				}
 
 				for(int j = i; j < numNodes; j++){
+					float d2 = transparentNodes[j]->getPosition().z;
+
+					if(!gui){
 						Vector3 v2 = transparentNodes[j]->getPosition() - camera->getPosition();
 						float a2 = v2.norm().getAngleBetween(camera->getDirection());
-							float d2 = v2.getLength() * cos(a2);
+						d2 = v2.getLength() * cos(a2);
+					}
 
-							if(d1 < d2)
+					if(d1 > d2)
 						swap(transparentNodes[i], transparentNodes[j]);
 				}
 			}

root.h

@@ -70,7 +70,7 @@ namespace vb01{
 			void initGuiPlane(Texture*, Texture*);
 			void updateBloomFramebuffer();
 			void updateGuiPlane();
-			void updateNodeTree(vb01::Node*);
+			void updateNodeTree(vb01::Node*, bool);
 	};
 }
 

text.vert

@@ -11,6 +11,6 @@ void main(){
 	float x, y;
 	x = (aVert.x - screen.x * .5) / (screen.x * .5);
 	y = (screen.y * .5 - (aVert.y)) / (screen.y * .5);
-	gl_Position = vec4(x, y, pos.z, 1);
+	gl_Position = vec4(x, y, -pos.z, 1);
 	texCoords = aVert.zw;
 }