Add phong shading

ParticleGenerator/res/shaders/scene/Billboard.vert

@@ -11,7 +11,6 @@ uniform mat4 uView;
 uniform mat4 uProj;
 
 out vec2 zTex;
-flat out uint zInstanceId;
 
 void main() { 
     vec3 cameraRight = vec3(uView[0][0], uView[1][0], uView[2][0]);
@@ -23,5 +22,4 @@ void main() {
 
     gl_Position = uProj * uView * models[gl_InstanceID] * vec4(vertexPosition, 1.0);
     zTex = aTex;
-    zInstanceId = gl_InstanceID;
 }
\ No newline at end of file

ParticleGenerator/res/shaders/scene/Phong.frag

+#version 330 core
+out vec4 FragColor;
+
+in vec3 zFramPosition;
+in vec3 zNormal;
+in vec2 zTexture;
+
+uniform vec3 uLightPosition; 
+uniform vec3 uViewPosition; 
+uniform vec3 uColor;
+
+uniform sampler2D uSlot;
+
+void main() {
+    float ambientStrength = 0.1;
+    vec3 ambient = ambientStrength * uColor;
+  	 
+    vec3 norm = normalize(zNormal);
+    vec3 lightDir = normalize(uLightPosition - zFramPosition);
+    vec3 diffuse = max(dot(norm, lightDir), 0.0) * uColor;
+    
+    float specularStrength = 0.5;
+    vec3 viewDir = normalize(uViewPosition - zFramPosition);
+    vec3 reflectDir = reflect(-lightDir, norm);  
+    float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
+    vec3 specular = specularStrength * spec * uColor;  
+        
+    vec3 result = (ambient + diffuse + specular);
+    FragColor = vec4(result, 1.0) * texture(uSlot, zTexture);
+} 
\ No newline at end of file

ParticleGenerator/res/shaders/scene/Phong.vert

+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTexture;
+
+out vec3 zFramPosition;
+out vec3 zNormal;
+out vec2 zTexture;
+
+layout(std140) uniform uModels_t {
+    mat4 models[1024];
+};
+
+uniform mat4 uView;
+uniform mat4 uProj;
+
+void main() {
+    zFramPosition = vec3(models[gl_InstanceID] * vec4(aPos, 1.0));
+    zNormal = mat3(transpose(inverse(models[gl_InstanceID]))) * aNormal;  
+    zTexture = aTexture;
+
+    gl_Position = uProj* uView * vec4(zFramPosition, 1.0);
+}
\ No newline at end of file

ParticleGenerator/src/Scene/Scenes/Mesh.cpp

@@ -32,8 +32,8 @@ namespace pg::scene
 		}
 
 		if(!this->_textureShader.usable()) {
-			Source vertexShaderSource(WORKSPACE_PATH + "res/shaders/scene/Texture-Fat.vert", Source::Categorie::VERTEX);
-			Source fragmentShaderSource(WORKSPACE_PATH + "res/shaders/scene/Texture.frag", Source::Categorie::FRAGMENT);
+			Source vertexShaderSource(WORKSPACE_PATH + "res/shaders/scene/Phong.vert", Source::Categorie::VERTEX);
+			Source fragmentShaderSource(WORKSPACE_PATH + "res/shaders/scene/Phong.frag", Source::Categorie::FRAGMENT);
 
 			this->_textureShader << vertexShaderSource;
 			this->_textureShader << fragmentShaderSource;
@@ -158,10 +158,16 @@ namespace pg::scene
 		
 		program->setUniform("uView", camera.getViewMatrix());
 		program->setUniform("uProj", camera.getViewFrustum().getProjectionMatrix());
-		program->setUniform("uColor", this->_color);
+		
 
 		if(this->_useTexture) {
 			program->setUniform("uSlot", 0);
+			program->setUniform("uLightPosition", glm::vec3(0.f , 10.f, 0.f));
+			program->setUniform("uViewPosition", camera.getPosition());
+			program->setUniform("uColor", glm::vec3(this->_color));
+		}
+		else {
+			program->setUniform("uColor", this->_color);
 		}
 
 		if(this->_wireframe) {