4 #include <cgmath/cgmath.h>
9 KEY_F1 = GLUT_KEY_F1 | 0x100,
10 KEY_F2 = GLUT_KEY_F2 | 0x100,
11 KEY_F3 = GLUT_KEY_F3 | 0x100,
12 KEY_F4 = GLUT_KEY_F4 | 0x100,
13 KEY_F5 = GLUT_KEY_F5 | 0x100,
14 KEY_F6 = GLUT_KEY_F6 | 0x100,
15 KEY_F7 = GLUT_KEY_F7 | 0x100,
16 KEY_F8 = GLUT_KEY_F8 | 0x100,
17 KEY_F9 = GLUT_KEY_F9 | 0x100,
18 KEY_F10 = GLUT_KEY_F10 | 0x100,
19 KEY_F11 = GLUT_KEY_F11 | 0x100,
20 KEY_F12 = GLUT_KEY_F12 | 0x100,
21 KEY_LEFT = GLUT_KEY_LEFT | 0x100,
22 KEY_UP = GLUT_KEY_UP | 0x100,
23 KEY_RIGHT = GLUT_KEY_RIGHT | 0x100,
24 KEY_DOWN = GLUT_KEY_DOWN | 0x100,
25 KEY_PGUP = GLUT_KEY_PAGE_UP | 0x100,
26 KEY_PGDN = GLUT_KEY_PAGE_DOWN | 0x100,
27 KEY_HOME = GLUT_KEY_HOME | 0x100,
28 KEY_END = GLUT_KEY_END | 0x100,
29 KEY_INS = GLUT_KEY_INSERT | 0x100
32 enum { INP_FWD, INP_BACK, INP_RIGHT, INP_LEFT, INP_FIRE, NUM_INPUTS };
34 static int init(void);
35 static void cleanup(void);
36 static void display(void);
37 static void idle(void);
38 static void reshape(int x, int y);
39 static void keydown(unsigned char key, int x, int y);
40 static void keyup(unsigned char key, int x, int y);
41 static void skeydown(int key, int x, int y);
42 static void skeyup(int key, int x, int y);
43 static void mouse(int bn, int st, int x, int y);
44 static void motion(int x, int y);
45 static unsigned int nextpow2(unsigned int x);
47 static long start_time;
49 static float cam_theta, cam_phi;
50 static cgm_vec3 cam_pos = {0, -1.6, 0};
51 static float pxform[16];
53 static int mouse_x, mouse_y;
54 static int bnstate[8];
56 static int inpstate[NUM_INPUTS];
58 static int keymap[NUM_INPUTS][2] = {
66 static struct level lvl;
68 static unsigned int tex;
69 static int tex_width, tex_height;
70 static int tex_intfmt;
71 static float tex_xform[16];
74 int main(int argc, char **argv)
76 glutInit(&argc, argv);
77 glutInitWindowSize(1280, 800);
78 glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
79 glutCreateWindow("cyberay");
81 glutDisplayFunc(display);
83 glutReshapeFunc(reshape);
84 glutKeyboardFunc(keydown);
85 glutKeyboardUpFunc(keyup);
86 glutSpecialFunc(skeydown);
87 glutSpecialUpFunc(skeyup);
89 glutMotionFunc(motion);
90 glutPassiveMotionFunc(motion);
101 static int init(void)
103 glEnable(GL_CULL_FACE);
106 glEnable(GL_DEPTH_TEST);
107 glEnable(GL_LIGHTING);
111 glGenTextures(1, &tex);
112 glBindTexture(GL_TEXTURE_2D, tex);
113 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
114 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
116 tex_intfmt = GL_RGB16F;
118 if(load_level(&lvl, "data/test.lvl") == -1) {
122 start_time = glutGet(GLUT_ELAPSED_TIME);
126 static void cleanup(void)
130 glDeleteTextures(1, &tex);
133 #define WALK_SPEED 3.0f
134 static void update(void)
136 static unsigned int prev_upd;
138 float dt, vfwd, vright;
140 msec = glutGet(GLUT_ELAPSED_TIME) - start_time;
141 dt = (float)(msec - prev_upd) / 1000.0f;
146 if(inpstate[INP_FWD]) {
147 vfwd -= WALK_SPEED * dt;
149 if(inpstate[INP_BACK]) {
150 vfwd += WALK_SPEED * dt;
152 if(inpstate[INP_RIGHT]) {
153 vright -= WALK_SPEED * dt;
155 if(inpstate[INP_LEFT]) {
156 vright += WALK_SPEED * dt;
159 cam_pos.x += cos(cam_theta) * vright + sin(cam_theta) * vfwd;
160 cam_pos.z += sin(cam_theta) * vright - cos(cam_theta) * vfwd;
162 cgm_midentity(pxform);
163 cgm_mtranslate(pxform, cam_pos.x, cam_pos.y, cam_pos.z);
164 cgm_mrotate_y(pxform, cam_theta);
165 cgm_mrotate_x(pxform, cam_phi);
168 static void display(void)
173 glBindTexture(GL_TEXTURE_2D, tex);
174 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, fb.width, fb.height, GL_RGB, GL_FLOAT, fb.pixels);
175 glEnable(GL_TEXTURE_2D);
189 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
191 glMatrixMode(GL_MODELVIEW);
192 glLoadMatrixf(pxform);
198 assert(glGetError() == GL_NO_ERROR);
201 static void idle(void)
206 static void reshape(int x, int y)
211 cgm_mperspective(proj, cgm_deg_to_rad(50.0f), (float)x / (float)y, 0.5, 500.0);
213 glMatrixMode(GL_PROJECTION);
217 if(x > tex_width || y > tex_height) {
218 tex_width = nextpow2(x);
219 tex_height = nextpow2(y);
221 glBindTexture(GL_TEXTURE_2D, tex);
222 glTexImage2D(GL_TEXTURE_2D, 0, tex_intfmt, tex_width, tex_height, 0, GL_RGB, GL_FLOAT, 0);
225 cgm_mscaling(tex_xform, (float)x / tex_width, (float)y / tex_height, 1.0f);
227 glMatrixMode(GL_TEXTURE);
228 glLoadMatrixf(tex_xform);
231 static void keyb(int key, int press)
235 for(i=0; i<NUM_INPUTS; i++) {
236 if(keymap[i][0] == key || keymap[i][1] == key) {
242 static void keydown(unsigned char key, int x, int y)
244 if(key == 27) exit(0);
248 static void keyup(unsigned char key, int x, int y)
253 static void skeydown(int key, int x, int y)
255 keyb(key | 0x100, 1);
258 static void skeyup(int key, int x, int y)
260 keyb(key | 0x100, 0);
263 static void mouse(int bn, int st, int x, int y)
267 bnstate[bn - GLUT_LEFT_BUTTON] = st == GLUT_DOWN ? 1 : 0;
270 static void motion(int x, int y)
272 int dx = x - mouse_x;
273 int dy = y - mouse_y;
277 if(!(dx | dy)) return;
280 cam_theta += dx * 0.01;
281 cam_phi += dy * 0.01;
283 if(cam_phi < -M_PI) cam_phi = -M_PI;
284 if(cam_phi > M_PI) cam_phi = M_PI;
288 static unsigned int nextpow2(unsigned int x)