main.cpp

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <iostream>
   4 #include <array>
   5 #include <vector>
   6 #ifdef __APPLE__
   7 #include <GL/glew.h>
   8 #else
   9 #include <OpenGL/glew.h>
  10 #endif
  11 #include <GLUT/glut.h>
  12 #include "shapes.hpp"
  13 #include <glm/glm.hpp>
  14 #include <glm/ext.hpp>
  15 #include <glm/gtc/type_ptr.hpp>
  16 #include "model.hpp"
  17 #include "program.hpp"
  18 #include "skybox.hpp"
  19 #include "image.hpp"
  20
  21 #pragma clang diagnostic ignored "-Wdeprecated-declarations"
  22
  23 using namespace std;
  24
  25 GLuint lightVao;
  26
  27 Program *textureProg, *plainProg, *reflectProg, *pbrProg;
  28 Skybox *skybox;
  29 Model *chest, *mirrorCube, *pbr;
  30 GLuint albedoMap, metallicMap, roughnessMap, normalMap, aoMap;
  31
  32 glm::vec3 camPos   = glm::vec3(0.0f, 0.0f,  -5.f);
  33 glm::vec3 camFront = glm::vec3(0.0f, 0.0f, 1.0f);
  34 glm::vec3 camUp    = glm::vec3(0.0f, 1.0f,  0.0f);
  35 float yaw = 1.57, pitch = 0;
  36 bool doScale, doRotate, doTranslate;
  37
  38 struct Light {
  39         glm::vec3 pos;
  40         glm::vec3 color;
  41 };
  42
  43 std::vector<Light> lights = {
  44         { glm::vec3(0, 0, 3), glm::vec3(1) },
  45         { glm::vec3(0, 3, 0), glm::vec3(1) },
  46         { glm::vec3(3, 0, 0), glm::vec3(1) },
  47         { glm::vec3(3, 0, 0), glm::vec3(1) }
  48 };
  49
  50 int activeLight = 0;
  51
  52 const int WIDTH = 800, HEIGHT = 600;
  53 const float ASPECT = (float)WIDTH / (float)HEIGHT;
  54
  55 glm::mat4 projMat() {
  56         return glm::perspective(glm::radians(45.f), ASPECT, 0.01f, 10000.f);
  57 }
  58
  59 glm::mat4 viewMat() {
  60         return glm::lookAt(camPos, camPos + camFront, camUp);
  61 }
  62
  63 void setProjectionAndViewUniforms(GLuint progId) {
  64         GLuint projLoc = glGetUniformLocation(progId, "projection");
  65         glm::mat4 proj = projMat();
  66         glUniformMatrix4fv(projLoc, 1, GL_FALSE, glm::value_ptr(proj));
  67
  68         GLuint viewLoc = glGetUniformLocation(progId, "view");
  69         glm::mat4 view = viewMat();
  70         glUniformMatrix4fv(viewLoc, 1, GL_FALSE, glm::value_ptr(view));
  71
  72         GLuint camPosLoc = glGetUniformLocation(progId, "camPos");
  73         glUniform3fv(camPosLoc, 1, glm::value_ptr(camPos));
  74 }
  75
  76 void setLightColorAndPos(GLuint progId, glm::vec3 lightPos, glm::vec4 lightColor) {
  77         GLuint lightColorLoc = glGetUniformLocation(progId, "lightColor");
  78         glUniform4fv(lightColorLoc, 1, glm::value_ptr(lightColor));
  79
  80         GLuint lightPosLoc = glGetUniformLocation(progId, "vLightPos");
  81         glUniform3fv(lightPosLoc, 1, glm::value_ptr(lightPos));
  82
  83         GLuint viewPosLoc = glGetUniformLocation(progId, "vViewPos");
  84         glUniform3fv(viewPosLoc, 1, glm::value_ptr(camPos));
  85 }
  86
  87 void drawLight(Light &light) {
  88         glUseProgram(plainProg->progId);
  89         glBindVertexArray(lightVao);
  90         setProjectionAndViewUniforms(plainProg->progId);
  91         glm::mat4 model = glm::translate(glm::mat4(1.f), light.pos);
  92         model = glm::scale(model, glm::vec3(0.2));
  93         GLuint modelLoc = glGetUniformLocation(plainProg->progId, "model");
  94         glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));
  95
  96         GLuint colorLoc = glGetUniformLocation(plainProg->progId, "color");
  97         glUniform4fv(colorLoc, 1, glm::value_ptr(light.color));
  98
  99         glDrawArrays(GL_TRIANGLES, 0, 36);
 100 }
 101
 102
 103 void display() {
 104         glClearColor(0.5, 0.5, 0.5, 1);
 105         glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
 106         float d = (float)glutGet(GLUT_ELAPSED_TIME) * 0.001f;
 107
 108         /* glm::vec4 lightColor(1, 1, 1, 1); */
 109
 110         /* drawLight(d, lightPos, lightColor); */
 111
 112         /* glUseProgram(textureProg->progId); */
 113         /* setProjectionAndViewUniforms(textureProg->progId); */
 114         /* setLightColorAndPos(textureProg->progId, lightPos, lightColor); */
 115
 116         /* Model::Node *top = chest->find("top"); */
 117         /* top->model = glm::translate(glm::mat4(1), glm::vec3(0, 1, -1)); */
 118         /* top->model = glm::rotate(top->model, sin(d / 2.5f) * 0.5f, glm::vec3(1, 0, 0)); */
 119         /* top->model = glm::translate(top->model, glm::vec3(0, -1, 1)); */
 120
 121         /* Model::Node *jewels = chest->find("jewels"); */
 122         /* jewels->model = glm::scale(glm::mat4(1), glm::vec3((sin(d) + 1.2f) / 2.f)); */
 123
 124         /* Model::Node *lock = chest->find("lock"); */
 125         /* lock->model = glm::translate(glm::mat4(1), glm::vec3(0.22610, 3.36478, -0.75649)); */
 126         /* lock->model = glm::rotate(lock->model, (d / 2.5f), glm::vec3(0, 1, 0.4)); */
 127         /* lock->model = glm::translate(lock->model, -glm::vec3(0.22610, 3.36478, -0.75649)); */
 128
 129         /* Model::Node *key = chest->find("key"); */
 130         /* key->model = glm::translate(glm::mat4(1), glm::vec3(0, 0, sin(d))); */
 131
 132         /* chest->draw(); */
 133
 134         /* mirrorCube->draw(); */
 135
 136         glUseProgram(pbrProg->progId);
 137         setProjectionAndViewUniforms(pbrProg->progId);
 138
 139         glm::vec3 lightPositions[4], lightColors[4];
 140         for (int i = 0; i < 4; i++) {
 141                 lightPositions[i] = lights[i].pos;
 142                 lightColors[i] = lights[i].color;
 143         }
 144
 145         glUniform3fv(glGetUniformLocation(pbrProg->progId, "lightPositions"), 4, glm::value_ptr(lightPositions[0]));
 146         glUniform3fv(glGetUniformLocation(pbrProg->progId, "lightColors"), 4, glm::value_ptr(lightColors[0]));
 147
 148         glUniform1i(glGetUniformLocation(pbrProg->progId, "albedoMap"), 0);
 149         glActiveTexture(GL_TEXTURE0);
 150         glBindTexture(GL_TEXTURE_2D, albedoMap);
 151
 152         glUniform1i(glGetUniformLocation(pbrProg->progId, "normalMap"), 1);
 153         glActiveTexture(GL_TEXTURE1);
 154         glBindTexture(GL_TEXTURE_2D, normalMap);
 155
 156         glUniform1i(glGetUniformLocation(pbrProg->progId, "metallicMap"), 2);
 157         glActiveTexture(GL_TEXTURE2);
 158         glBindTexture(GL_TEXTURE_2D, metallicMap);
 159
 160         glUniform1i(glGetUniformLocation(pbrProg->progId, "roughnessMap"), 3);
 161         glActiveTexture(GL_TEXTURE3);
 162         glBindTexture(GL_TEXTURE_2D, roughnessMap);
 163
 164         glUniform1i(glGetUniformLocation(pbrProg->progId, "aoMap"), 3);
 165         glActiveTexture(GL_TEXTURE4);
 166         glBindTexture(GL_TEXTURE_2D, aoMap);
 167
 168         pbr->draw();
 169
 170         for (Light &light: lights) drawLight(light);
 171
 172         skybox->draw(projMat(), viewMat());
 173
 174         glutSwapBuffers();
 175 }
 176
 177 void setupLightBuffers(GLuint progId) {
 178         auto vertices = cube();
 179         GLuint verticesSize = 36 * 3 * sizeof(GLfloat);
 180
 181         glGenVertexArrays(1, &lightVao);
 182         GLuint vbo;
 183         glBindVertexArray(lightVao);
 184         glGenBuffers(1, &vbo);
 185         glBindBuffer(GL_ARRAY_BUFFER, vbo);
 186         glBufferData(GL_ARRAY_BUFFER, verticesSize, NULL, GL_STATIC_DRAW);
 187         glBufferSubData(GL_ARRAY_BUFFER, 0, verticesSize, glm::value_ptr(vertices[0]));
 188         GLuint posLoc = glGetAttribLocation(progId, "vPosition");
 189         glEnableVertexAttribArray(posLoc);
 190         glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
 191 }
 192
 193 GLuint loadTexture(const std::string &path) {
 194         Image img(path);
 195         GLuint texId;
 196         glGenTextures(1, &texId);
 197         glBindTexture(GL_TEXTURE_2D, texId);
 198         glTexImage2D(GL_TEXTURE_2D, 0, img.format(), img.width(), img.height(), 0, img.format(), GL_UNSIGNED_BYTE, img.data());
 199         glGenerateMipmap(GL_TEXTURE_2D);
 200         return texId;
 201 }
 202
 203 void init() {
 204         plainProg = new Program("plainvertex.glsl", "plainfrag.glsl");
 205         glUseProgram(plainProg->progId);
 206         setupLightBuffers(plainProg->progId);
 207         plainProg->validate();
 208
 209         skybox = new Skybox(Image("models/loftSkybox/Newport_Loft_Ref.hdr"));
 210
 211         /* textureProg = new Program("texturevertex.glsl", "texturefrag.glsl"); */
 212         /* chest = new Model("models/chest.dae", *textureProg, *skybox); */
 213         /* mirrorCube = new Model("models/mirrorCube.dae", *textureProg, *skybox); */
 214
 215         pbrProg = new Program("pbrvert.glsl", "pbrfrag.glsl");
 216         glUseProgram(pbrProg->progId);
 217         pbr = new Model("models/sphere.dae", *pbrProg, *skybox);
 218
 219         albedoMap = loadTexture("models/darktiles/darktiles1_basecolor.png");
 220         metallicMap = loadTexture("models/darktiles/darktiles1_metallic.png");
 221         normalMap = loadTexture("models/darktiles/darktiles1_normal.png");
 222         roughnessMap = loadTexture("models/darktiles/darktiles1_roughness.png");
 223         aoMap = loadTexture("models/darktiles/darktiles1_AO.png");
 224
 225         glEnable(GL_DEPTH_TEST);
 226         glEnable(GL_CULL_FACE);
 227 }
 228
 229 bool* keyStates = new bool[256];
 230
 231 void keyboard(unsigned char key, int x, int y) {
 232         keyStates[key] = true;
 233         if (key == 'z')
 234                 doScale = !doScale;
 235         if (key == 'x')
 236                 doRotate = !doRotate;
 237         if (key == 'c')
 238                 doTranslate = !doTranslate;
 239 }
 240
 241 void keyboardUp(unsigned char key, int x, int y) {
 242         keyStates[key] = false;
 243 }
 244
 245 void timer(int _) {
 246         float xSpeed = 0.f, ySpeed = 0.f, zSpeed = 0.f;
 247         if (keyStates['w'])
 248                 zSpeed = 0.1f;
 249         if (keyStates['s'])
 250                 zSpeed = -0.1f;
 251         if (keyStates['a'])
 252                 xSpeed = 0.1f;
 253         if (keyStates['d'])
 254                 xSpeed = -0.1f;
 255         if (keyStates['q'])
 256                 ySpeed = 0.1f;
 257         if (keyStates['e'])
 258                 ySpeed = -0.1f;
 259
 260         if (keyStates['j']) lights[activeLight].pos.z += 0.1f;
 261         if (keyStates['k']) lights[activeLight].pos.z -= 0.1f;
 262         if (keyStates['h']) lights[activeLight].pos.x -= 0.1f;
 263         if (keyStates['l']) lights[activeLight].pos.x += 0.1f;
 264         if (keyStates['m']) lights[activeLight].pos.y -= 0.1f;
 265         if (keyStates['n']) lights[activeLight].pos.y += 0.1f;
 266
 267         camPos.x += xSpeed * sin(yaw) + zSpeed * cos(yaw);
 268         camPos.y += ySpeed;
 269         camPos.z += zSpeed * sin(yaw) - xSpeed * cos(yaw);
 270         glutPostRedisplay();
 271         glutTimerFunc(16, timer, 0);
 272 }
 273
 274 int prevMouseX, prevMouseY;
 275 bool firstMouse = true;
 276
 277 void motion(int x, int y) {
 278         if (firstMouse) {
 279                 prevMouseX = x;
 280                 prevMouseY = y;
 281                 firstMouse = false;
 282         }
 283         int dx = x - prevMouseX, dy = y - prevMouseY;
 284
 285         prevMouseX = x;
 286         prevMouseY = y;
 287
 288         const float sensitivity = 0.005f;
 289         yaw += dx * sensitivity;
 290         pitch -= dy * sensitivity;
 291
 292         glm::vec3 front;
 293         front.x = cos(pitch) * cos(yaw);
 294         front.y = sin(pitch);
 295         front.z = cos(pitch) * sin(yaw);
 296         camFront = glm::normalize(front);
 297
 298         if (pitch < -1.57079632679 || pitch >= 1.57079632679) {
 299                 camUp = glm::vec3(0, -1, 0);
 300         } else {
 301                 camUp = glm::vec3(0, 1, 0);
 302         }
 303 }
 304
 305 void mouse(int button, int state, int x, int y) {
 306         if (button == GLUT_LEFT_BUTTON && state == GLUT_UP)
 307                 firstMouse = true;
 308 }
 309
 310 int main(int argc, char** argv) {
 311         glutInit(&argc, argv);
 312         glutInitDisplayMode(GLUT_DEPTH|GLUT_DOUBLE|GLUT_RGB|GLUT_3_2_CORE_PROFILE);
 313         glutInitWindowSize(WIDTH, HEIGHT);
 314         int win = glutCreateWindow("Hello Triangle");
 315         glutDisplayFunc(display);
 316
 317         glewInit();
 318
 319         init();
 320
 321         glutKeyboardFunc(keyboard);
 322         glutKeyboardUpFunc(keyboardUp);
 323         glutTimerFunc(16, timer, 0);
 324         glutMotionFunc(motion);
 325         glutMouseFunc(mouse);
 326
 327         glutMainLoop();
 328
 329         return 0;
 330 }
 331