int main() {
// 1.1 Initialize the GLFW
glfwInit();
// 1.2 Set GLFW options
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// 1.3 Create a GLFW window
GLFWwindow* window = glfwCreateWindow(Width, Height, "LearnOpengl", nullptr, nullptr);
if (window == nullptr) {
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate();
return -1;
}
// 1.4 Link GLFW window
glfwMakeContextCurrent(window);
// 2.1 Set callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
// 2.2 Capture the mouse
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// 3.1 Set GLEW
glewExperimental = GL_TRUE;
if (glewInit() != GLEW_OK) {
std::cout << "Failed to initialize GLEW" << std::endl;
glfwTerminate();
return -1;
}
// 4. Set viewport
glViewport(0, 0, Width, Height);
// 5. Link shaders
Shader objectShader("object.vert", "object.frag");
Shader lampShader("lamp.vert", "lamp.frag");
// 6. Create vertices
GLfloat vertices[] = {
// position // normal
-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, -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
};
// 7. Create and set object VAO and VBO
GLuint objectVAO;
glGenVertexArrays(1, &objectVAO);
glBindVertexArray(objectVAO);
GLuint VBO;
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6* sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glBindVertexArray(0);
// 8. Create and set light VAO
GLuint lampVAO;
glGenVertexArrays(1, &lampVAO);
glBindVertexArray(lampVAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
// 9. Enable depth test
glEnable(GL_DEPTH_TEST);
// 10. Game Loop
GLfloat lastFrame = 0.0f;
while (glfwWindowShouldClose(window) == GL_FALSE) {
glfwPollEvents();
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
keyboard_movement();
// Make lamp spinning
lampPosition.x = 2 * std::sin(1.2f * currentFrame);
lampPosition.z = 0.2f + 2 * std::cos(1.2f * currentFrame);
// object shader
objectShader.use();
// vertex shader's variables
GLint modelLocation = glGetUniformLocation(objectShader.getProgram(), "model");
GLint viewLocation = glGetUniformLocation(objectShader.getProgram(), "view");
GLint projectionLocation = glGetUniformLocation(objectShader.getProgram(), "projection");
GLint lampPositionLocation = glGetUniformLocation(objectShader.getProgram(), "lampPosition");
glm::mat4 model;
model = glm::translate(model, glm::vec3(0.0f, -1.0f, 0.0f));
glm::mat4 view = glm::lookAt(cameraPosition, cameraPosition + cameraFront, cameraUp);
glm::mat4 projection = glm::perspective(glm::radians(45.0f), (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(model));
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(projection));
glUniform3f(lampPositionLocation, lampPosition.x, lampPosition.y, lampPosition.z);
// fragment shader's variables
GLint lampAmbientLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.ambient");
GLint lampDiffuseLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.diffuse");
GLint lampSpecularLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.specular");
GLint materialAmbientLocation = glGetUniformLocation(objectShader.getProgram(), "material.ambient");
GLint materialDiffuseLocation = glGetUniformLocation(objectShader.getProgram(), "material.diffuse");
GLint materialSpecularLocation = glGetUniformLocation(objectShader.getProgram(), "material.specular");
GLint materialShininessLocation = glGetUniformLocation(objectShader.getProgram(), "material.shininess");
glUniform3f(lampAmbientLocation, 1.0f, 1.0f, 1.0f);
glUniform3f(lampDiffuseLocation, 1.0f, 1.0f, 1.0f);
glUniform3f(lampSpecularLocation, 1.0f, 1.0f, 1.0f);
glUniform3f(materialAmbientLocation, 0.0215f, 0.1745f, 0.0215f);
glUniform3f(materialDiffuseLocation, 0.07568f, 0.61424f, 0.07568f);
glUniform3f(materialSpecularLocation, 0.633f, 0.727811f, 0.633f);
glUniform1f(materialShininessLocation, 76.8f);
// drawing
glBindVertexArray(objectVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
// lamp shader
lampShader.use();
// vertex shader's variables
modelLocation = glGetUniformLocation(lampShader.getProgram(), "model");
viewLocation = glGetUniformLocation(lampShader.getProgram(), "view");
projectionLocation = glGetUniformLocation(lampShader.getProgram(), "projection");
glm::mat4 lampModel;
lampModel = glm::translate(lampModel, lampPosition);
lampModel = glm::scale(lampModel, glm::vec3(0.2f));
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(lampModel));
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(projection));
// drawing
glBindVertexArray(lampVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
glfwSwapBuffers(window);
}
glDeleteVertexArrays(1, &objectVAO);
glDeleteVertexArrays(1, &lampVAO);
glDeleteBuffers(1, &VBO);
glfwTerminate();
return 0;
}
int main() {
// 1.1 Initialize the GLFW
glfwInit();
// 1.2 Set GLFW options
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
// 1.3 Create a GLFW window
GLFWwindow* window = glfwCreateWindow(Width, Height, "LearnOpengl", nullptr, nullptr);
if (window == nullptr) {
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate();
return -1;
}
// 1.4 Link GLFW window
glfwMakeContextCurrent(window);
// 2.1 Set callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
// 2.2 Capture the mouse
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// 3.1 Set GLEW
glewExperimental = GL_TRUE;
if (glewInit() != GLEW_OK) {
std::cout << "Failed to initialize GLEW" << std::endl;
glfwTerminate();
return -1;
}
// 4. Set viewport
glViewport(0, 0, Width, Height);
// 5. Link shaders
Shader objectShader("object.vert", "object.frag");
Shader lampShader("lamp.vert", "lamp.frag");
// 6. Create vertices
GLfloat vertices[] = {
// Positions // Normals // Texture Coordinates
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f
};
glm::vec3 cubePositions[] = {
glm::vec3( 0.0f, 0.0f, 0.0f),
glm::vec3( 2.0f, 5.0f, -15.0f),
glm::vec3(-1.5f, -2.2f, -2.5f),
glm::vec3(-3.8f, -2.0f, -12.3f),
glm::vec3( 2.4f, -0.4f, -3.5f),
glm::vec3(-1.7f, 3.0f, -7.5f),
glm::vec3( 1.3f, -2.0f, -2.5f),
glm::vec3( 1.5f, 2.0f, -2.5f),
glm::vec3( 1.5f, 0.2f, -1.5f),
glm::vec3(-1.3f, 1.0f, -1.5f)
};
// 7. Create and set object VAO and VBO
GLuint objectVAO;
glGenVertexArrays(1, &objectVAO);
glBindVertexArray(objectVAO);
GLuint VBO;
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)(6 * sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glBindVertexArray(0);
// 8. Create and set light VAO
GLuint lampVAO;
glGenVertexArrays(1, &lampVAO);
glBindVertexArray(lampVAO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
// 9. Create diffuse map and specular map
GLuint diffuseMap;
glGenTextures(1, &diffuseMap);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
int imageWidth, imageHeight;
unsigned char* image = SOIL_load_image("img/box.png", &imageWidth, &imageHeight, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, imageWidth, imageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0);
GLuint specularMap;
glGenTextures(1, &specularMap);
glBindTexture(GL_TEXTURE_2D, specularMap);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
image = SOIL_load_image("img/boundary.png", &imageWidth, &imageHeight, 0, SOIL_LOAD_RGB);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, imageWidth, imageHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
SOIL_free_image_data(image);
glBindTexture(GL_TEXTURE_2D, 0);
// 10. Enable depth test
glEnable(GL_DEPTH_TEST);
// 11. Game Loop
GLfloat lastFrame = 0.0f;
while (glfwWindowShouldClose(window) == GL_FALSE) {
glfwPollEvents();
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
keyboard_movement();
// object shader
objectShader.use();
// vertex shader's variables
GLint modelLocation = glGetUniformLocation(objectShader.getProgram(), "model");
GLint viewLocation = glGetUniformLocation(objectShader.getProgram(), "view");
GLint projectionLocation = glGetUniformLocation(objectShader.getProgram(), "projection");
// glm::mat4 model;
// model = glm::translate(model, glm::vec3(0.0f, -1.0f, 0.0f));
glm::mat4 view = glm::lookAt(cameraPosition, cameraPosition + cameraFront, cameraUp);
glm::mat4 projection = glm::perspective(glm::radians(45.0f), (GLfloat)Width / (GLfloat)Height, 0.1f, 100.0f);
// glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(model));
glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(projection));
// fragment shader's variables
GLint lampDirectionLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.direction");
GLint lampAmbientLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.ambient");
GLint lampDiffuseLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.diffuse");
GLint lampSpecularLocation = glGetUniformLocation(objectShader.getProgram(), "lamp.specular");
GLint materialDiffuseLocation = glGetUniformLocation(objectShader.getProgram(), "material.diffuse");
GLint materialSpecularLocation = glGetUniformLocation(objectShader.getProgram(), "material.specular");
GLint materialShininessLocation = glGetUniformLocation(objectShader.getProgram(), "material.shininess");
// w must be 0.0f: it's just a direction, we don't want translation works
glm::vec4 lampDirectionInViewSpace = view * glm::vec4(lampDirection.x, lampDirection.y, lampDirection.z, 0.0f);
glUniform3f(lampDirectionLocation, lampDirectionInViewSpace.x, lampDirectionInViewSpace.y, lampDirectionInViewSpace.z);
glUniform3f(lampAmbientLocation, 0.2f, 0.2f, 0.2f);
glUniform3f(lampDiffuseLocation, 0.5f, 0.5f, 0.5f);
glUniform3f(lampSpecularLocation, 1.0f, 1.0f, 1.0f);
glUniform1i(materialDiffuseLocation, 0);
glUniform1i(materialSpecularLocation, 1);
glUniform1f(materialShininessLocation, 64.0f);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, diffuseMap);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, specularMap);
// drawing
glBindVertexArray(objectVAO);
for(GLuint i = 0; i < 10; i++) {
glm::mat4 model;
model = glm::translate(model, cubePositions[i]);
GLfloat angle = 20.0f * i;
model = glm::rotate(model, angle, glm::vec3(1.0f, 0.3f, 0.5f));
glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
}
glBindVertexArray(0);
// // lamp shader
// lampShader.use();
//
// // vertex shader's variables
// modelLocation = glGetUniformLocation(lampShader.getProgram(), "model");
// viewLocation = glGetUniformLocation(lampShader.getProgram(), "view");
// projectionLocation = glGetUniformLocation(lampShader.getProgram(), "projection");
//
// glm::mat4 lampModel;
// lampModel = glm::translate(lampModel, lampPosition);
// lampModel = glm::scale(lampModel, glm::vec3(0.2f));
// glUniformMatrix4fv(modelLocation, 1, GL_FALSE, glm::value_ptr(lampModel));
// glUniformMatrix4fv(viewLocation, 1, GL_FALSE, glm::value_ptr(view));
// glUniformMatrix4fv(projectionLocation, 1, GL_FALSE, glm::value_ptr(projection));
//
// // drawing
// glBindVertexArray(lampVAO);
// glDrawArrays(GL_TRIANGLES, 0, 36);
// glBindVertexArray(0);
glfwSwapBuffers(window);
}
glDeleteVertexArrays(1, &objectVAO);
glDeleteVertexArrays(1, &lampVAO);
glDeleteBuffers(1, &VBO);
glfwTerminate();
return 0;
}
// The MAIN function, from here we start the application and run the game loop
void basicLight()
{
// Init GLFW
glfwInit();
// Set all the required options for GLFW
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
// Create a GLFWwindow object that we can use for GLFW's functions
GLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, "LearnOpenGL", nullptr, nullptr);
glfwMakeContextCurrent(window);
// Set the required callback functions
glfwSetKeyCallback(window, key_callback);
glfwSetCursorPosCallback(window, mouse_callback);
glfwSetScrollCallback(window, scroll_callback);
// GLFW Options
glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
// Set this to true so GLEW knows to use a modern approach to retrieving function pointers and extensions
glewExperimental = GL_TRUE;
// Initialize GLEW to setup the OpenGL Function pointers
glewInit();
// Define the viewport dimensions
glViewport(0, 0, WIDTH, HEIGHT);
// OpenGL options
glEnable(GL_DEPTH_TEST);
// Build and compile our shader program
Shader lampShader(lightVertexObjectSS, lightFragmentSS);
Shader objectShader(objectVertexObjectSS, objectFragmentSS);
//Shader objectShader(gouraudObjectVertexObjectSS, gouraudObjectFragmentSS);
// Set up vertex data (and buffer(s)) and attribute pointers
GLfloat 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, -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
};
// First, set the container's VAO (and VBO)
GLuint VBO, containerVAO;
glGenVertexArrays(1, &containerVAO);
glGenBuffers(1, &VBO);
glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glBindVertexArray(containerVAO);
// Position attribute
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
// Normal attribute
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
glEnableVertexAttribArray(1);
glBindVertexArray(0);
// Then, we set the light's VAO (VBO stays the same. After all, the vertices are the same for the light object (also a 3D cube))
GLuint lightVAO;
glGenVertexArrays(1, &lightVAO);
glBindVertexArray(lightVAO);
// We only need to bind to the VBO (to link it with glVertexAttribPointer), no need to fill it; the VBO's data already contains all we need.
glBindBuffer(GL_ARRAY_BUFFER, VBO);
// Set the vertex attributes (only position data for the lamp))
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(0);
glBindVertexArray(0);
// Game loop
while (!glfwWindowShouldClose(window))
{
// Calculate deltatime of current frame
GLfloat currentFrame = glfwGetTime();
deltaTime = currentFrame - lastFrame;
lastFrame = currentFrame;
// Check if any events have been activiated (key pressed, mouse moved etc.) and call corresponding response functions
glfwPollEvents();
do_movement();
// Clear the colorbuffer
glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//////////////////////////////////////////////////////////////////////
// Use cooresponding shader when setting uniforms/drawing objects
objectShader.Use();
GLint objectColorLoc = glGetUniformLocation(objectShader.Program, "objectColor");
GLint lightColorLoc = glGetUniformLocation(objectShader.Program, "lightColor");
GLint lightPosLoc = glGetUniformLocation(objectShader.Program, "lightPos");
GLint viewPosLoc = glGetUniformLocation(objectShader.Program, "viewPos");
glUniform3f(objectColorLoc, 1.0f, 0.5f, 0.31f);
glUniform3f(lightColorLoc, 1.0f, 1.0f, 1.0f);
lightPos.x = sin(glfwGetTime()) * 1.5f;
lightPos.y = cos(glfwGetTime()/2) * 1.0f;
glUniform3f(lightPosLoc, lightPos.x, lightPos.y, lightPos.z);
glUniform3f(viewPosLoc, camera.Position.x, camera.Position.y, camera.Position.z);
// Create camera transformations
glm::mat4 view;
view = camera.GetViewMatrix();
glm::mat4 projection = glm::perspective(camera.Zoom, (GLfloat)WIDTH / (GLfloat)HEIGHT, 0.1f, 100.0f);
// Get the uniform locations
GLint modelLoc = glGetUniformLocation(objectShader.Program, "model");
GLint viewLoc = glGetUniformLocation(objectShader.Program, "view");
GLint projLoc = glGetUniformLocation(objectShader.Program, "projection");
// Pass the matrices to the shader
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
// Draw the container (using container's vertex attributes)
glBindVertexArray(containerVAO);
glm::mat4 model;
GLfloat angle = glm::radians(glfwGetTime() * 45.0f);
model = glm::rotate(model, angle, glm::vec3(1.0f, 0.5f, 0.0f));
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
///////////////////////////////////////////////////////////////
// Also draw the lamp object, again binding the appropriate shader
lampShader.Use();
// Get location objects for the matrices on the lamp shader (these could be different on a different shader)
modelLoc = glGetUniformLocation(lampShader.Program, "model");
viewLoc = glGetUniformLocation(lampShader.Program, "view");
projLoc = glGetUniformLocation(lampShader.Program, "projection");
// Set matrices
glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(projection));
model = glm::mat4();
model = glm::translate(model, lightPos);
model = glm::scale(model, glm::vec3(0.2f)); // Make it a smaller cube
glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
// Draw the light object (using light's vertex attributes)
glBindVertexArray(lightVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
// Swap the screen buffers
glfwSwapBuffers(window);
}
// Terminate GLFW, clearing any resources allocated by GLFW.
glfwTerminate();
}
