Nigel
de96aa4136
Both a directional and four points lights are used in this scene. Fixed a memory leak caused by the vertex Array buffer of the lights never being deleted
399 lines
12 KiB
C++
399 lines
12 KiB
C++
#include <stdio.h>
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#include <cmath>
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include "stb_image.h"
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#include "shader.h"
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#include "camera.h"
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float deltaTime = 0.0f; // Time between current frame and last frame
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float lastFrame = 0.0f; // Time of last frame
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Camera camera(glm::vec3(0.0f, 0.0f, 8.0f));
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float lastX = 400, lastY = 300;
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bool firstMouse = true;
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glm::vec3 lightpos(-0.2f, -1.0f, -0.3f);
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void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
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glViewport(0,0, width, height);
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}
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void processInput( GLFWwindow* window){
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if(glfwGetKey(window,GLFW_KEY_ESCAPE) == GLFW_PRESS)
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glfwSetWindowShouldClose(window, true);
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const float CameraSpeed = 2.5f * deltaTime;
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if(glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
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camera.ProcessKeyboard(FORWARD, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
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camera.ProcessKeyboard(BACKWARD, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
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camera.ProcessKeyboard(LEFT, deltaTime);
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if(glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
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camera.ProcessKeyboard(RIGHT,deltaTime);
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}
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void mouse_callback(GLFWwindow* window, double xpos, double ypos){
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if (firstMouse) // initially set to true
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{
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lastX = xpos;
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lastY = ypos;
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firstMouse = false;
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}
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float xoffset = xpos - lastX;
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float yoffset = lastY - ypos; // reversed since y-coordinates range from bottom to top
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lastX = xpos;
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lastY = ypos;
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camera.ProcessMouseMovement(xoffset,yoffset);
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}
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void scroll_callback(GLFWwindow* window, double xoffset, double yoffset)
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{
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camera.ProcessMouseScroll(yoffset);
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}
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int main() {
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printf("Hello OpenGL!\n");
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glfwInit();
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
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if( window == NULL){
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printf("Failed to create GLFW window!\n");
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glfwTerminate();
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return -1;
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}
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glfwMakeContextCurrent(window);
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if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)){
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printf("Failed to initialize GLAD!\n");
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return -1;
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}
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glViewport(0,0, 800, 600);
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glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
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Shader lightshader("lightsource.vs", "lightsource.fs");
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Shader shader ("shader.vs", "shader.fs");
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float vertices[] = {
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// positions // normals // texture coords
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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-0.5f, -0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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0.5f, -0.5f, -0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
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0.5f, -0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
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0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
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0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
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-0.5f, -0.5f, 0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
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-0.5f, -0.5f, -0.5f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
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0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
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0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
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-0.5f, 0.5f, 0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
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-0.5f, 0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f
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};
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glm::vec3 cubePositions[] = {
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glm::vec3( 0.0f, 0.0f, 0.0f),
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glm::vec3( 2.0f, 5.0f, -15.0f),
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glm::vec3(-1.5f, -2.2f, -2.5f),
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glm::vec3(-3.8f, -2.0f, -12.3f),
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glm::vec3( 2.4f, -0.4f, -3.5f),
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glm::vec3(-1.7f, 3.0f, -7.5f),
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glm::vec3( 1.3f, -2.0f, -2.5f),
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glm::vec3( 1.5f, 2.0f, -2.5f),
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glm::vec3( 1.5f, 0.2f, -1.5f),
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glm::vec3(-1.3f, 1.0f, -1.5f)
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};
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glm::vec3 lightPositions[] = {
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glm::vec3( 0.7f, 0.2f, 2.0f),
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glm::vec3( 2.3f, -3.3f, -4.0f),
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glm::vec3(-4.0f, 2.0f, -12.0f),
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glm::vec3( 0.0f, 0.0f, -3.0f)
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};
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unsigned int VBO, VAO;
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glGenVertexArrays(1, &VAO);
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glGenBuffers(1, &VBO);
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glBindVertexArray(VAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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// position attribute
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*)0);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void*) (3*sizeof(float)));
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(2,2,GL_FLOAT,GL_FALSE, 8 * sizeof(float), (void*) (6*sizeof(float)));
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glEnableVertexAttribArray(2);
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unsigned int lightVAO;
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glGenVertexArrays(1, &lightVAO);
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glBindVertexArray(lightVAO);
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glBindBuffer(GL_ARRAY_BUFFER, VBO);
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glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE, 8* sizeof(float), (void*) 0);
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glEnableVertexAttribArray(0);
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// Load diffuse texture
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int width, height, nrChannels;
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unsigned int diffuseMap;
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glGenTextures(1, &diffuseMap);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, diffuseMap);
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glTextureParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTextureParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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unsigned char* data = stbi_load("Textures/container2.png", &width, &height, &nrChannels, 0);
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if(data){
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
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glGenerateMipmap(GL_TEXTURE_2D);
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} else{
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std::cout << "Error loading texture...." << std::endl;
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}
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stbi_image_free(data);
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// Load Specular texture
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unsigned int specularMap;
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glGenTextures(1, &specularMap);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, specularMap);
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unsigned char* specular_data = stbi_load("Textures/container2_specular.png", &width, &height, &nrChannels, 0);
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if( specular_data ){
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, specular_data);
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glGenerateMipmap(GL_TEXTURE_2D);
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}else{
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std::cout << "Error loading texture...." << std::endl;
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}
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stbi_image_free(specular_data);
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glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
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glfwSetCursorPosCallback(window, mouse_callback);
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glfwSetScrollCallback(window, scroll_callback);
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glEnable(GL_DEPTH_TEST);
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while(!glfwWindowShouldClose(window))
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{
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float currentFrame = glfwGetTime();
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deltaTime = currentFrame - lastFrame;
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lastFrame = currentFrame;
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processInput(window);
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glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glm::mat4 model = glm::mat4(1.0f);
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glm::mat4 view = glm::mat4(1.0f);
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glm::mat4 projection = glm::mat4(1.0f);
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view = camera.GetViewMatrix();
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projection = glm::perspective(glm::radians(camera.Zoom), (float)800 / (float)600, 0.1f, 100.0f);
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float orbital_speed = .4 ;
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// draw cubes
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shader.use();
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shader.setInt("material.diffuse", 0);
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shader.setInt("material.specular", 1);
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shader.setVec3("material.specular", glm::vec3(0.5, 0.5f, 0.5f));
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shader.setFloat("material.shininess", 32.0f);
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/*
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Directional light
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vec3 direction;
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vec3 ambient;
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vec3 diffuse;
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vec3 specular;
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*/
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shader.setVec3("dirlight.direction", glm::vec3(1.0f,0.0f, 2.0f));
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shader.setVec3("dirlight.ambient", glm::vec3(0.2f, 0.2f, 0.2f));
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shader.setVec3("dirlight.diffuse", glm::vec3(0.5f, 0.5f, 0.5f));
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shader.setVec3("dirlight.specular", glm::vec3(1.0f, 1.0f, 1.0f));
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/*
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Point Lights;
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*/
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shader.setVec3("PointLights[0].position", glm::vec3( 0.7f, 0.2f, 2.0f));
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shader.setVec3("PointLights[1].position", glm::vec3( 2.3f, -3.3f, -4.0f));
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shader.setVec3("PointLights[2].position", glm::vec3(-4.0f, 2.0f, -12.0f));
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shader.setVec3("PointLights[3].position", glm::vec3( 0.0f, 0.0f, -3.0f));
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shader.setVec3("PointLights[0].ambient", glm::vec3(0.2f, 0.2f, 0.2f));
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shader.setVec3("PointLights[0].diffuse", glm::vec3(0.5f, 0.5f, 0.5f));
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shader.setVec3("PointLights[0].specular", glm::vec3(1.0f, 1.0f, 1.0f));
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shader.setVec3("PointLights[1].ambient", glm::vec3(0.2f, 0.2f, 0.2f));
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shader.setVec3("PointLights[1].diffuse", glm::vec3(0.5f, 0.5f, 0.5f));
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shader.setVec3("PointLights[1].specular", glm::vec3(1.0f, 1.0f, 1.0f));
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shader.setVec3("PointLights[2].ambient", glm::vec3(0.2f, 0.2f, 0.2f));
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shader.setVec3("PointLights[2].diffuse", glm::vec3(0.5f, 0.5f, 0.5f));
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shader.setVec3("PointLights[2].specular", glm::vec3(1.0f, 1.0f, 1.0f));
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shader.setVec3("PointLights[3].ambient", glm::vec3(0.2f, 0.2f, 0.2f));
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shader.setVec3("PointLights[3].diffuse", glm::vec3(0.5f, 0.5f, 0.5f));
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shader.setVec3("PointLights[3].specular", glm::vec3(1.0f, 1.0f, 1.0f));
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shader.setFloat("PointLights[0].constant", 1.0f);
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shader.setFloat("PointLights[1].constant", 1.0f);
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shader.setFloat("PointLights[2].constant", 1.0f);
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shader.setFloat("PointLights[3].constant", 1.0f);
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shader.setFloat("PointLights[0].linear", 0.09f);
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shader.setFloat("PointLights[1].linear", 0.09f);
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shader.setFloat("PointLights[2].linear", 0.09f);
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shader.setFloat("PointLights[3].linear", 0.09f);
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shader.setFloat("PointLights[0].quadratic", 0.032f);
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shader.setFloat("PointLights[1].quadratic", 0.032f);
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shader.setFloat("PointLights[2].quadratic", 0.032f);
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shader.setFloat("PointLights[3].quadratic", 0.032f);
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shader.setVec3("viewPos", camera.Position);
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shader.setMat4("view", view);
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shader.setMat4("projection", projection);
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model = glm::mat4(1.0);
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shader.setMat4("model", model);
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glActiveTexture(GL_TEXTURE0);
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glBindTexture(GL_TEXTURE_2D, diffuseMap);
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glActiveTexture(GL_TEXTURE1);
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glBindTexture(GL_TEXTURE_2D, specularMap);
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for( unsigned int i = 0; i < 10; i++ ){
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glm::mat4 model = glm::mat4(1.0f);
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model = glm::translate(model , cubePositions[i]);
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float angle = 20.0f * i;
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model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
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shader.setMat4("model", model);
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glBindVertexArray(VAO);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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}
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// draw lights
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lightshader.use();
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lightshader.setMat4("view", view);
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lightshader.setMat4("projection", projection);
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model = glm::mat4(1.0f);
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model = glm::translate(model, lightpos);
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model = glm::scale(model, glm::vec3(0.2f));
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for ( int i = 0; i < 4 ; i ++){
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model = glm::translate(model, lightPositions[i]);
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lightshader.setMat4("model", model);
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glBindVertexArray(lightVAO);
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glDrawArrays(GL_TRIANGLES, 0, 36);
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}
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glfwSwapBuffers(window);
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glfwPollEvents();
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}
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glDeleteVertexArrays(1, &VAO);
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glDeleteVertexArrays(1, &lightVAO);
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glDeleteBuffers(1, &VBO);
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glfwTerminate();
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return 0;
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} |