symmetry

annotate src/main.cc @ 0:a90a71a74f0b

find changesets by author, revision, files, or words in the commit message
initial commit
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 25 Feb 2014 19:53:34 +0200
parents
children 46fe847bba08
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <assert.h>
nuclear@0 4 #include <vector>
nuclear@0 5 #include "opengl.h"
nuclear@0 6 #include "camera.h"
nuclear@0 7
nuclear@0 8 static bool init();
nuclear@0 9 static void cleanup();
nuclear@0 10 static void handle_input(float dt);
nuclear@0 11 static void disp();
nuclear@0 12 static void idle();
nuclear@0 13 static void reshape(int x, int y);
nuclear@0 14 static void keypress(unsigned char key, int x, int y);
nuclear@0 15 static void keyrelease(unsigned char key, int x, int y);
nuclear@0 16 static void mouse(int bn, int st, int x, int y);
nuclear@0 17 static void motion(int x, int y);
nuclear@0 18
nuclear@0 19 static goatgfx::VRFpsCamera cam;
nuclear@0 20 static std::vector<bool> keystate(256);
nuclear@0 21
nuclear@0 22 int main(int argc, char **argv)
nuclear@0 23 {
nuclear@0 24 glutInitWindowSize(800, 600);
nuclear@0 25 glutInit(&argc, argv);
nuclear@0 26 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
nuclear@0 27 glutCreateWindow("symmetry");
nuclear@0 28
nuclear@0 29 glutDisplayFunc(disp);
nuclear@0 30 glutIdleFunc(idle);
nuclear@0 31 glutReshapeFunc(reshape);
nuclear@0 32 glutKeyboardFunc(keypress);
nuclear@0 33 glutKeyboardUpFunc(keyrelease);
nuclear@0 34 glutMouseFunc(mouse);
nuclear@0 35 glutMotionFunc(motion);
nuclear@0 36
nuclear@0 37 if(!init()) {
nuclear@0 38 return 1;
nuclear@0 39 }
nuclear@0 40 atexit(cleanup);
nuclear@0 41
nuclear@0 42 glutMainLoop();
nuclear@0 43 return 0;
nuclear@0 44 }
nuclear@0 45
nuclear@0 46
nuclear@0 47 static bool init()
nuclear@0 48 {
nuclear@0 49 glewInit();
nuclear@0 50
nuclear@0 51 glEnable(GL_DEPTH_TEST);
nuclear@0 52 glEnable(GL_CULL_FACE);
nuclear@0 53
nuclear@0 54 glEnable(GL_LIGHTING);
nuclear@0 55 glEnable(GL_LIGHT0);
nuclear@0 56
nuclear@0 57 cam.input_move(0, 1.65, 0);
nuclear@0 58
nuclear@0 59 return true;
nuclear@0 60 }
nuclear@0 61
nuclear@0 62 static void cleanup()
nuclear@0 63 {
nuclear@0 64 }
nuclear@0 65
nuclear@0 66 static void disp()
nuclear@0 67 {
nuclear@0 68 unsigned int msec = glutGet(GLUT_ELAPSED_TIME);
nuclear@0 69 static unsigned int prev_msec;
nuclear@0 70 float dt = (float)(msec - prev_msec) / 1000.0f;
nuclear@0 71
nuclear@0 72 handle_input(dt);
nuclear@0 73
nuclear@0 74 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@0 75
nuclear@0 76 glMatrixMode(GL_MODELVIEW);
nuclear@0 77 glLoadIdentity();
nuclear@0 78 cam.use_inverse();
nuclear@0 79
nuclear@0 80 glBegin(GL_QUADS);
nuclear@0 81 glNormal3f(0, 1, 0);
nuclear@0 82 glVertex3f(-5, 0, 5);
nuclear@0 83 glVertex3f(5, 0, 5);
nuclear@0 84 glVertex3f(5, 0, -5);
nuclear@0 85 glVertex3f(-5, 0, -5);
nuclear@0 86 glEnd();
nuclear@0 87
nuclear@0 88 glFrontFace(GL_CW);
nuclear@0 89 glutSolidTeapot(1.0);
nuclear@0 90 glFrontFace(GL_CCW);
nuclear@0 91
nuclear@0 92 glutSwapBuffers();
nuclear@0 93 assert(glGetError() == GL_NO_ERROR);
nuclear@0 94 }
nuclear@0 95
nuclear@0 96
nuclear@0 97 static void handle_input(float dt)
nuclear@0 98 {
nuclear@0 99 Vector3 inpv;
nuclear@0 100 float offs = dt * 2.0;
nuclear@0 101
nuclear@0 102 if(keystate['w'] || keystate['W']) {
nuclear@0 103 inpv.z -= offs;
nuclear@0 104 }
nuclear@0 105 if(keystate['s'] || keystate['S']) {
nuclear@0 106 inpv.z += offs;
nuclear@0 107 }
nuclear@0 108 if(keystate['d'] || keystate['D']) {
nuclear@0 109 inpv.x += offs;
nuclear@0 110 }
nuclear@0 111 if(keystate['a'] || keystate['A']) {
nuclear@0 112 inpv.x -= offs;
nuclear@0 113 }
nuclear@0 114
nuclear@0 115 cam.input_move(inpv.x, inpv.y, inpv.z);
nuclear@0 116 }
nuclear@0 117
nuclear@0 118 static void idle()
nuclear@0 119 {
nuclear@0 120 glutPostRedisplay();
nuclear@0 121 }
nuclear@0 122
nuclear@0 123 static void reshape(int x, int y)
nuclear@0 124 {
nuclear@0 125 glViewport(0, 0, x, y);
nuclear@0 126
nuclear@0 127 glMatrixMode(GL_PROJECTION);
nuclear@0 128 glLoadIdentity();
nuclear@0 129 gluPerspective(45.0, (float)x / (float)y, 0.5, 500.0);
nuclear@0 130 }
nuclear@0 131
nuclear@0 132 static void keypress(unsigned char key, int x, int y)
nuclear@0 133 {
nuclear@0 134 keystate[key] = true;
nuclear@0 135
nuclear@0 136 switch(key) {
nuclear@0 137 case 27:
nuclear@0 138 exit(0);
nuclear@0 139 }
nuclear@0 140 }
nuclear@0 141
nuclear@0 142 static void keyrelease(unsigned char key, int x, int y)
nuclear@0 143 {
nuclear@0 144 keystate[key] = false;
nuclear@0 145 }
nuclear@0 146
nuclear@0 147 static int prev_x, prev_y;
nuclear@0 148 static bool bnstate[32];
nuclear@0 149
nuclear@0 150 static void mouse(int bn, int st, int x, int y)
nuclear@0 151 {
nuclear@0 152 prev_x = x;
nuclear@0 153 prev_y = y;
nuclear@0 154 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN;
nuclear@0 155 }
nuclear@0 156
nuclear@0 157 static void motion(int x, int y)
nuclear@0 158 {
nuclear@0 159 int dx = x - prev_x;
nuclear@0 160 int dy = y - prev_y;
nuclear@0 161 prev_x = x;
nuclear@0 162 prev_y = y;
nuclear@0 163
nuclear@0 164 if(!dx && !dy) {
nuclear@0 165 return;
nuclear@0 166 }
nuclear@0 167
nuclear@0 168 if(bnstate[0]) {
nuclear@0 169 float dtheta_deg = dy * 0.5;
nuclear@0 170 float dphi_deg = dx * 0.5;
nuclear@0 171
nuclear@0 172 cam.input_rotate(DEG_TO_RAD(dtheta_deg), DEG_TO_RAD(dphi_deg), 0);
nuclear@0 173 }
nuclear@0 174 }