5 #include <cgmath/cgmath.h>
8 KEY_F1 = GLUT_KEY_F1 | 0x100,
9 KEY_F2 = GLUT_KEY_F2 | 0x100,
10 KEY_F3 = GLUT_KEY_F3 | 0x100,
11 KEY_F4 = GLUT_KEY_F4 | 0x100,
12 KEY_F5 = GLUT_KEY_F5 | 0x100,
13 KEY_F6 = GLUT_KEY_F6 | 0x100,
14 KEY_F7 = GLUT_KEY_F7 | 0x100,
15 KEY_F8 = GLUT_KEY_F8 | 0x100,
16 KEY_F9 = GLUT_KEY_F9 | 0x100,
17 KEY_F10 = GLUT_KEY_F10 | 0x100,
18 KEY_F11 = GLUT_KEY_F11 | 0x100,
19 KEY_F12 = GLUT_KEY_F12 | 0x100,
20 KEY_LEFT = GLUT_KEY_LEFT | 0x100,
21 KEY_UP = GLUT_KEY_UP | 0x100,
22 KEY_RIGHT = GLUT_KEY_RIGHT | 0x100,
23 KEY_DOWN = GLUT_KEY_DOWN | 0x100,
24 KEY_PGUP = GLUT_KEY_PAGE_UP | 0x100,
25 KEY_PGDN = GLUT_KEY_PAGE_DOWN | 0x100,
26 KEY_HOME = GLUT_KEY_HOME | 0x100,
27 KEY_END = GLUT_KEY_END | 0x100,
28 KEY_INS = GLUT_KEY_INSERT | 0x100
31 enum { INP_FWD, INP_BACK, INP_RIGHT, INP_LEFT, INP_FIRE, NUM_INPUTS };
33 static int init(void);
34 static void cleanup(void);
35 static void display(void);
36 static void idle(void);
37 static void reshape(int x, int y);
38 static void keydown(unsigned char key, int x, int y);
39 static void keyup(unsigned char key, int x, int y);
40 static void skeydown(int key, int x, int y);
41 static void skeyup(int key, int x, int y);
42 static void mouse(int bn, int st, int x, int y);
43 static void motion(int x, int y);
46 static long start_time;
48 static float cam_theta, cam_phi;
49 static cgm_vec3 cam_pos;
50 static float pxform[16];
52 static int mouse_x, mouse_y;
53 static int bnstate[8];
55 static int inpstate[NUM_INPUTS];
57 static int keymap[NUM_INPUTS][2] = {
65 int main(int argc, char **argv)
67 glutInit(&argc, argv);
68 glutInitWindowSize(1280, 800);
69 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
70 glutCreateWindow("cyberay");
72 glutDisplayFunc(display);
74 glutReshapeFunc(reshape);
75 glutKeyboardFunc(keydown);
76 glutKeyboardUpFunc(keyup);
77 glutSpecialFunc(skeydown);
78 glutSpecialUpFunc(skeyup);
80 glutMotionFunc(motion);
81 glutPassiveMotionFunc(motion);
94 glEnable(GL_CULL_FACE);
96 glEnable(GL_DEPTH_TEST);
97 glEnable(GL_LIGHTING);
100 start_time = glutGet(GLUT_ELAPSED_TIME);
104 static void cleanup(void)
108 #define WALK_SPEED 1.0f
109 static void update(void)
111 static unsigned int prev_upd;
113 float dt, vfwd, vright;
115 msec = glutGet(GLUT_ELAPSED_TIME) - start_time;
116 dt = (float)(msec - prev_upd) / 1000.0f;
121 if(inpstate[INP_FWD]) {
122 vfwd -= WALK_SPEED * dt;
124 if(inpstate[INP_BACK]) {
125 vfwd += WALK_SPEED * dt;
127 if(inpstate[INP_RIGHT]) {
128 vright -= WALK_SPEED * dt;
130 if(inpstate[INP_LEFT]) {
131 vright += WALK_SPEED * dt;
134 cam_pos.x += cos(cam_theta) * vright + sin(cam_theta) * vfwd;
135 cam_pos.z += sin(cam_theta) * vright - cos(cam_theta) * vfwd;
137 cgm_midentity(pxform);
138 cgm_mtranslate(pxform, cam_pos.x, cam_pos.y, cam_pos.z);
139 cgm_mrotate_y(pxform, cam_theta);
140 cgm_mrotate_x(pxform, cam_phi);
143 static void display(void)
147 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
149 glMatrixMode(GL_MODELVIEW);
150 glLoadMatrixf(pxform);
153 glutSolidTeapot(1.0);
157 assert(glGetError() == GL_NO_ERROR);
160 static void idle(void)
165 static void reshape(int x, int y)
167 glMatrixMode(GL_PROJECTION);
169 gluPerspective(50.0, (float)x / (float)y, 0.5, 500.0);
172 static void keyb(int key, int press)
176 for(i=0; i<NUM_INPUTS; i++) {
177 if(keymap[i][0] == key || keymap[i][1] == key) {
183 static void keydown(unsigned char key, int x, int y)
185 if(key == 27) exit(0);
189 static void keyup(unsigned char key, int x, int y)
194 static void skeydown(int key, int x, int y)
196 keyb(key | 0x100, 1);
199 static void skeyup(int key, int x, int y)
201 keyb(key | 0x100, 0);
204 static void mouse(int bn, int st, int x, int y)
208 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN ? 1 : 0;
211 static void motion(int x, int y)
213 int dx = x - mouse_x;
214 int dy = y - mouse_y;
218 if(!(dx | dy)) return;
221 cam_theta += dx * 0.01;
222 cam_phi += dy * 0.01;
224 if(cam_phi < -M_PI) cam_phi = -M_PI;
225 if(cam_phi > M_PI) cam_phi = M_PI;