Code re-work and content update: lighting.

src/1.getting_started/5.1.transformations/transformations.cpp

@@ -169,11 +169,11 @@ int main()
         transform = glm::rotate(transform, (float)glfwGetTime(), glm::vec3(0.0f, 0.0f, 1.0f));
 
         // get matrix's uniform location and set matrix
+        ourShader.use();
         unsigned int transformLoc = glGetUniformLocation(ourShader.ID, "transform");
         glUniformMatrix4fv(transformLoc, 1, GL_FALSE, glm::value_ptr(transform));
 
         // render container
-        ourShader.use();
         glBindVertexArray(VAO);
         glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
 

src/1.getting_started/7.4.camera_class/camera_class.cpp

@@ -23,8 +23,8 @@ const unsigned int SCR_HEIGHT = 600;
 
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
 // timing
@@ -281,7 +281,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/1.colors/1.colors.fs

@@ -1,10 +1,10 @@
 #version 330 core
-out vec4 fragColor;
+out vec4 FragColor;
   
 uniform vec3 objectColor;
 uniform vec3 lightColor;
 
 void main()
 {
-    fragColor = vec4(lightColor * objectColor, 1.0f);
+    FragColor = vec4(lightColor * objectColor, 1.0);
 }

src/2.lighting/1.colors/1.colors.vs

@@ -7,5 +7,5 @@ uniform mat4 projection;
 
 void main()
 {
-	gl_Position = projection * view * model * vec4(aPos, 1.0f);
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
 }

src/2.lighting/1.colors/1.lamp.fs

@@ -1,7 +1,7 @@
 #version 330 core
-out vec4 fragColor;
+out vec4 FragColor;
 
 void main()
 {
-    fragColor = vec4(1.0f); // set alle 4 vector values to 1.0f
+    FragColor = vec4(1.0); // set alle 4 vector values to 1.0
 }

src/2.lighting/1.colors/1.lamp.vs

@@ -7,5 +7,5 @@ uniform mat4 projection;
 
 void main()
 {
-	gl_Position = projection * view * model * vec4(aPos, 1.0f);
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
 }

src/2.lighting/1.colors/colors.cpp

@@ -16,13 +16,18 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos);
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -40,14 +45,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -159,7 +164,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
         
         // be sure to activate shader when setting uniforms/drawing objects
@@ -168,7 +173,7 @@ int main()
         lightingShader.setVec3("lightColor",  1.0f, 1.0f, 1.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -220,7 +225,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/2.1.basic_lighting_diffuse/2.1.basic_lighting.fs

@@ -1,5 +1,5 @@
 #version 330 core
-out vec4 fragColor;
+out vec4 FragColor;
 
 in vec3 Normal;  
 in vec3 FragPos;  
@@ -11,15 +11,15 @@ uniform vec3 objectColor;
 void main()
 {
     // ambient
-    float ambientStrength = 0.1f;
+    float ambientStrength = 0.1;
     vec3 ambient = ambientStrength * lightColor;
   	
     // diffuse 
     vec3 norm = normalize(Normal);
     vec3 lightDir = normalize(lightPos - FragPos);
-    float diff = max(dot(norm, lightDir), 0.0f);
+    float diff = max(dot(norm, lightDir), 0.0);
     vec3 diffuse = diff * lightColor;
             
     vec3 result = (ambient + diffuse) * objectColor;
-    fragColor = vec4(result, 1.0f);
+    FragColor = vec4(result, 1.0);
 } 

src/2.lighting/2.1.basic_lighting_diffuse/2.1.basic_lighting.vs

@@ -11,8 +11,8 @@ uniform mat4 projection;
 
 void main()
 {
-    FragPos = vec3(model * vec4(aPos, 1.0f));
+    FragPos = vec3(model * vec4(aPos, 1.0));
     Normal = aNormal;  
     
-    gl_Position = projection * view * vec4(FragPos, 1.0f);
+    gl_Position = projection * view * vec4(FragPos, 1.0);
 }

src/2.lighting/2.1.basic_lighting_diffuse/2.1.lamp.fs

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0); // set alle 4 vector values to 1.0
+}

src/2.lighting/2.1.basic_lighting_diffuse/2.1.lamp.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
+}

src/2.lighting/2.1.basic_lighting_diffuse/basic_lighting_diffuse.cpp

@@ -16,13 +16,18 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos);
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;	
 float lastFrame = 0.0f;
 
 // lighting
@@ -40,14 +45,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -70,7 +75,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("2.1.basic_lighting.vs", "2.1.basic_lighting.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("2.1.lamp.vs", "2.1.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -162,7 +167,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -172,7 +177,7 @@ int main()
         lightingShader.setVec3("lightPos", lightPos);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -224,7 +229,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/2.2.basic_lighting_specular/2.2.basic_lighting.fs

@@ -1,5 +1,5 @@
 #version 330 core
-out vec4 fragColor;
+out vec4 FragColor;
 
 in vec3 Normal;  
 in vec3 FragPos;  
@@ -12,22 +12,22 @@ uniform vec3 objectColor;
 void main()
 {
     // ambient
-    float ambientStrength = 0.1f;
+    float ambientStrength = 0.1;
     vec3 ambient = ambientStrength * lightColor;
   	
     // diffuse 
     vec3 norm = normalize(Normal);
     vec3 lightDir = normalize(lightPos - FragPos);
-    float diff = max(dot(norm, lightDir), 0.0f);
+    float diff = max(dot(norm, lightDir), 0.0);
     vec3 diffuse = diff * lightColor;
     
     // specular
-    float specularStrength = 0.5f;
+    float specularStrength = 0.5;
     vec3 viewDir = normalize(viewPos - FragPos);
     vec3 reflectDir = reflect(-lightDir, norm);  
     float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
     vec3 specular = specularStrength * spec * lightColor;  
         
     vec3 result = (ambient + diffuse + specular) * objectColor;
-    fragColor = vec4(result, 1.0f);
+    FragColor = vec4(result, 1.0);
 } 

src/2.lighting/2.2.basic_lighting_specular/2.2.basic_lighting.vs

@@ -11,8 +11,8 @@ uniform mat4 projection;
 
 void main()
 {
-    FragPos = vec3(model * vec4(aPos, 1.0f));
+    FragPos = vec3(model * vec4(aPos, 1.0));
     Normal = mat3(transpose(inverse(model))) * aNormal;  
     
-    gl_Position = projection * view * vec4(FragPos, 1.0f);
+    gl_Position = projection * view * vec4(FragPos, 1.0);
 }

src/2.lighting/2.2.basic_lighting_specular/2.2.lamp.fs

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0); // set alle 4 vector values to 1.0
+}

src/2.lighting/2.2.basic_lighting_specular/2.2.lamp.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
+}

src/2.lighting/2.2.basic_lighting_specular/basic_lighting_specular.cpp

@@ -16,13 +16,18 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos);
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;	
 float lastFrame = 0.0f;
 
 // lighting
@@ -40,14 +45,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -70,7 +75,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("2.2.basic_lighting.vs", "2.2.basic_lighting.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("2.2.lamp.vs", "2.2.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -162,7 +167,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -173,7 +178,7 @@ int main()
         lightingShader.setVec3("viewPos", camera.Position);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -225,7 +230,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/3.1.materials/3.1.lamp.fs

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0); // set alle 4 vector values to 1.0
+}

src/2.lighting/3.1.materials/3.1.lamp.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
+}

src/2.lighting/3.1.materials/3.1.materials.fs

@@ -1,5 +1,5 @@
 #version 330 core
-out vec4 fragColor;
+out vec4 FragColor;
 
 struct Material {
     vec3 ambient;
@@ -41,5 +41,5 @@ void main()
     vec3 specular = light.specular * (spec * material.specular);  
         
     vec3 result = ambient + diffuse + specular;
-    fragColor = vec4(result, 1.0f);
+    FragColor = vec4(result, 1.0);
 } 

src/2.lighting/3.1.materials/3.1.materials.vs

@@ -11,8 +11,8 @@ uniform mat4 projection;
 
 void main()
 {
-    FragPos = vec3(model * vec4(aPos, 1.0f));
+    FragPos = vec3(model * vec4(aPos, 1.0));
     Normal = mat3(transpose(inverse(model))) * aNormal;  
     
-    gl_Position = projection * view * vec4(FragPos, 1.0f);
+    gl_Position = projection * view * vec4(FragPos, 1.0);
 }

src/2.lighting/3.1.materials/materials.cpp

@@ -16,13 +16,18 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos);
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f; 
 float lastFrame = 0.0f;
 
 // lighting
@@ -40,14 +45,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -70,7 +75,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("3.1.materials.vs", "3.1.materials.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("3.1.lamp.vs", "3.1.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -162,7 +167,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -188,7 +193,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -240,7 +245,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/3.2.materials_exercise1/3.2.lamp.fs

@@ -0,0 +1,7 @@
+#version 330 core
+out vec4 FragColor;
+
+void main()
+{
+    FragColor = vec4(1.0); // set alle 4 vector values to 1.0
+}

src/2.lighting/3.2.materials_exercise1/3.2.lamp.vs

@@ -0,0 +1,11 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * view * model * vec4(aPos, 1.0);
+}

src/2.lighting/3.2.materials_exercise1/3.2.materials.fs

@@ -0,0 +1,45 @@
+#version 330 core
+out vec4 FragColor;
+
+struct Material {
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;    
+    float shininess;
+}; 
+
+struct Light {
+    vec3 position;
+
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+
+in vec3 FragPos;  
+in vec3 Normal;  
+  
+uniform vec3 viewPos;
+uniform Material material;
+uniform Light light;
+
+void main()
+{
+    // ambient
+    vec3 ambient = light.ambient * material.ambient;
+  	
+    // diffuse 
+    vec3 norm = normalize(Normal);
+    vec3 lightDir = normalize(light.position - FragPos);
+    float diff = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = light.diffuse * (diff * material.diffuse);
+    
+    // specular
+    vec3 viewDir = normalize(viewPos - FragPos);
+    vec3 reflectDir = reflect(-lightDir, norm);  
+    float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
+    vec3 specular = light.specular * (spec * material.specular);  
+        
+    vec3 result = ambient + diffuse + specular;
+    FragColor = vec4(result, 1.0);
+} 

src/2.lighting/3.2.materials_exercise1/3.2.materials.vs

@@ -0,0 +1,18 @@
+#version 330 core
+layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec3 aNormal;
+
+out vec3 FragPos;
+out vec3 Normal;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+
+void main()
+{
+    FragPos = vec3(model * vec4(aPos, 1.0));
+    Normal = mat3(transpose(inverse(model))) * aNormal;  
+    
+    gl_Position = projection * view * vec4(FragPos, 1.0);
+}

src/2.lighting/3.2.materials_exercise1/materials_exercise1.cpp

@@ -16,13 +16,18 @@ void mouse_callback(GLFWwindow* window, double xpos, double ypos);
 void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -40,14 +45,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -70,22 +75,22 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("3.1.materials.vs", "3.1.materials.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("3.1.lamp.vs", "3.1.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
     float vertices[] = {
         -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
-        0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+         0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
-        0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+         0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
-        0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
+         0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
         -0.5f,  0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
         -0.5f, -0.5f, -0.5f,  0.0f,  0.0f, -1.0f,
 
         -0.5f, -0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
-        0.5f, -0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
+         0.5f, -0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
-        0.5f,  0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
+         0.5f,  0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
-        0.5f,  0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
+         0.5f,  0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
         -0.5f,  0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
         -0.5f, -0.5f,  0.5f,  0.0f,  0.0f,  1.0f,
 
@@ -96,24 +101,24 @@ int main()
         -0.5f, -0.5f,  0.5f, -1.0f,  0.0f,  0.0f,
         -0.5f,  0.5f,  0.5f, -1.0f,  0.0f,  0.0f,
 
-        0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
-        0.5f,  0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f,  0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
-        0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
-        0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f, -0.5f, -0.5f,  1.0f,  0.0f,  0.0f,
-        0.5f, -0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f, -0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
-        0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
+         0.5f,  0.5f,  0.5f,  1.0f,  0.0f,  0.0f,
 
         -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
-        0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
+         0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
-        0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
+         0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
-        0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
+         0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
         -0.5f, -0.5f,  0.5f,  0.0f, -1.0f,  0.0f,
         -0.5f, -0.5f, -0.5f,  0.0f, -1.0f,  0.0f,
 
         -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,
-        0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,
+         0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f,
-        0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
+         0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
-        0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
+         0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
         -0.5f,  0.5f,  0.5f,  0.0f,  1.0f,  0.0f,
         -0.5f,  0.5f, -0.5f,  0.0f,  1.0f,  0.0f
     };
@@ -162,7 +167,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -182,7 +187,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -234,7 +239,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/4.1.lighting_maps_diffuse_map/lighting_maps_diffuse.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -42,14 +47,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -72,7 +77,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("4.1.lighting_maps.vs", "4.1.lighting_maps.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("4.1.lamp.vs", "4.1.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -172,7 +177,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -190,7 +195,7 @@ int main()
         lightingShader.setFloat("material.shininess", 64.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -246,7 +251,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/4.2.lighting_maps_specular_map/lighting_maps_specular.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -42,14 +47,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -72,7 +77,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("4.2.lighting_maps.vs", "4.2.lighting_maps.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("4.2.lamp.vs", "4.2.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -174,7 +179,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -191,7 +196,7 @@ int main()
         lightingShader.setFloat("material.shininess", 64.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -250,7 +255,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
@@ -270,7 +274,6 @@ void framebuffer_size_callback(GLFWwindow* window, int width, int height)
     glViewport(0, 0, width, height);
 }
 
-
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow* window, double xpos, double ypos)

src/2.lighting/4.3.lighting_maps_exercise4/lighting_maps_exercise4.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -42,14 +47,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -72,7 +77,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("4.3.lighting_maps.vs", "4.3.lighting_maps.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("4.3.lamp.vs", "4.3.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -176,7 +181,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -193,7 +198,7 @@ int main()
         lightingShader.setFloat("material.shininess", 64.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -255,7 +260,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/5.1.light_casters_directional/light_casters_directional.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 int main()
@@ -38,14 +43,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -68,7 +73,7 @@ int main()
     // build and compile shaders
     // -------------------------
     Shader lightingShader("5.1.light_casters.vs", "5.1.light_casters.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("5.1.lamp.vs", "5.1.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -183,7 +188,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -200,7 +205,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -273,7 +278,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)

src/2.lighting/5.2.light_casters_point/light_casters_point.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -41,14 +46,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -71,7 +76,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("5.2.light_casters.vs", "5.2.light_casters.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("5.2.lamp.vs", "5.2.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -186,7 +191,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -206,7 +211,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -275,7 +280,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
@@ -295,7 +299,6 @@ void framebuffer_size_callback(GLFWwindow* window, int width, int height)
     glViewport(0, 0, width, height);
 }
 
-
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow* window, double xpos, double ypos)

src/2.lighting/5.3.light_casters_spot/light_casters_spot.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 int main()
@@ -38,14 +43,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -68,7 +73,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("5.3.light_casters.vs", "5.3.light_casters.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("5.3.lamp.vs", "5.3.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -183,7 +188,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -207,7 +212,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -276,7 +281,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
@@ -296,7 +300,6 @@ void framebuffer_size_callback(GLFWwindow* window, int width, int height)
     glViewport(0, 0, width, height);
 }
 
-
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow* window, double xpos, double ypos)

src/2.lighting/5.4.light_casters_spot_soft/light_casters_spot_soft.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 int main()
@@ -38,14 +43,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -68,7 +73,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("5.4.light_casters.vs", "5.4.light_casters.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("5.4.lamp.vs", "5.4.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -183,7 +188,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -208,7 +213,7 @@ int main()
         lightingShader.setFloat("material.shininess", 32.0f);
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -238,7 +243,6 @@ int main()
             glDrawArrays(GL_TRIANGLES, 0, 36);
         }
 
-
         // again, a lamp object is weird when we only have a spot light, don't render the light object
         // lampShader.use();
         // lampShader.setMat4("projection", projection);
@@ -277,7 +281,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
@@ -297,7 +300,6 @@ void framebuffer_size_callback(GLFWwindow* window, int width, int height)
     glViewport(0, 0, width, height);
 }
 
-
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow* window, double xpos, double ypos)

src/2.lighting/6.multiple_lights/6.multiple_lights.cpp

@@ -18,13 +18,18 @@ void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
 void processInput(GLFWwindow *window);
 unsigned int loadTexture(const char *path);
 
+// settings
+const unsigned int SCR_WIDTH = 800;
+const unsigned int SCR_HEIGHT = 600;
+
 // camera
 Camera camera(glm::vec3(0.0f, 0.0f, 3.0f));
-float lastX = 800.0f / 2.0;
+float lastX = SCR_WIDTH / 2.0f;
-float lastY = 600.0 / 2.0;
+float lastY = SCR_HEIGHT / 2.0f;
 bool firstMouse = true;
 
-float deltaTime = 0.0f;	// time between current frame and last frame
+// timing
+float deltaTime = 0.0f;
 float lastFrame = 0.0f;
 
 // lighting
@@ -41,14 +46,14 @@ int main()
 
     // glfw window creation
     // --------------------
-    GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
+    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-    glfwMakeContextCurrent(window);
     if (window == NULL)
     {
         std::cout << "Failed to create GLFW window" << std::endl;
         glfwTerminate();
         return -1;
     }
+    glfwMakeContextCurrent(window);
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
     glfwSetCursorPosCallback(window, mouse_callback);
     glfwSetScrollCallback(window, scroll_callback);
@@ -71,7 +76,7 @@ int main()
     // build and compile our shader zprogram
     // ------------------------------------
     Shader lightingShader("6.multiple_lights.vs", "6.multiple_lights.fs");
-    Shader lampShader("1.lamp.vs", "1.lamp.fs");
+    Shader lampShader("6.lamp.vs", "6.lamp.fs");
 
     // set up vertex data (and buffer(s)) and configure vertex attributes
     // ------------------------------------------------------------------
@@ -193,7 +198,7 @@ int main()
 
         // render
         // ------
-        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
+        glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         // be sure to activate shader when setting uniforms/drawing objects
@@ -257,7 +262,7 @@ int main()
         lightingShader.setFloat("spotLight.outerCutOff", glm::cos(glm::radians(15.0f)));     
 
         // view/projection transformations
-        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), 800.0f / 600.0f, 0.1f, 100.0f);
+        glm::mat4 projection = glm::perspective(glm::radians(camera.Zoom), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f);
         glm::mat4 view = camera.GetViewMatrix();
         lightingShader.setMat4("projection", projection);
         lightingShader.setMat4("view", view);
@@ -287,7 +292,6 @@ int main()
             glDrawArrays(GL_TRIANGLES, 0, 36);
         }
 
-
          // also draw the lamp object(s)
          lampShader.use();
          lampShader.setMat4("projection", projection);
@@ -330,7 +334,6 @@ void processInput(GLFWwindow *window)
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
         glfwSetWindowShouldClose(window, true);
 
-    float cameraSpeed = 2.5 * deltaTime;
     if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
         camera.ProcessKeyboard(FORWARD, deltaTime);
     if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
@@ -350,7 +353,6 @@ void framebuffer_size_callback(GLFWwindow* window, int width, int height)
     glViewport(0, 0, width, height);
 }
 
-
 // glfw: whenever the mouse moves, this callback is called
 // -------------------------------------------------------
 void mouse_callback(GLFWwindow* window, double xpos, double ypos)