reflection

shader.fs

@@ -1,13 +1,19 @@
 #version 460 core
 out vec4 FragColor;
 
+in vec3 Normal;
+in vec3 Position;
 
-
+uniform vec3 cameraPos;
+uniform samplerCube skybox;
 
 in vec2 TexCoords;
 uniform sampler2D texture_diffuse1;
 
 void main()
 {
-    FragColor = texture( texture_diffuse1, TexCoords) ;
+    vec3 I = normalize(Position - cameraPos);
+    vec3 R = reflect(I, normalize(Normal));
+
+    FragColor =  vec4(texture(skybox,R).rgb, 1.0); // texture( texture_diffuse1, TexCoords) ;
 }

shader.vs

@@ -8,10 +8,15 @@ uniform mat4 view;
 uniform mat4 projection;
 
 out vec2 TexCoords;
+out vec3 Normal;
+out vec3 Position;
 
 
-void main(){
+void main()
+{
+    Normal = mat3(transpose(inverse(model))) * aNormal;
+    Position = vec3(model* vec4(aPos, 1.0));
 
-    gl_Position = projection * view * model * vec4(aPos , 1.0);
     TexCoords = aTexCoords;
+    gl_Position = projection * view * model * vec4(aPos , 1.0);
 }

src/main.cpp

@@ -186,7 +186,7 @@ void Skybox_pass (GLuint& SkyboxVAO, Shader& skyboxShader, Cubemap& skycubemap)
    glDepthMask(GL_TRUE);
 }
 
-void drawScene_pass(Shader& shader,  Model& Object)
+void drawScene_pass(Shader& shader,  Model& Object, Cubemap& skybox)
 {
    //glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
    //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -194,6 +194,9 @@ void drawScene_pass(Shader& shader,  Model& Object)
 
 
    shader.use();
+
+   shader.setVec3("cameraPos", camera.Position);
+   skybox.Bind();
    shader.setMat4("model", model);
    shader.setMat4("view", view);
    shader.setMat4("projection", projection);
@@ -374,7 +377,7 @@ while(!glfwWindowShouldClose(window))
 
    Skybox_pass(SkyboxVAO, skyboxShader, skybox);
 
-   drawScene_pass(shader,  backpack);
+   drawScene_pass(shader,  backpack, skybox);
 
    outline_pass(outlineShader, backpack);