16 static int handle_sball_event(sball_event *ev);
17 static void recalc_sball_matrix(float *xform);
24 static vec3_t pos = {0, 0, 0};
25 static quat_t rot = {0, 0, 0, 1};
27 int main(int argc, char **argv)
29 fbsize = fb_width * fb_height * fb_bpp / CHAR_BIT;
31 init_logger("demo.log");
36 if((use_mouse = have_mouse())) {
37 set_mouse_limits(0, 0, fb_width, fb_height);
38 set_mouse(fb_width / 2, fb_height / 2);
41 if(!(fb_pixels = malloc(fbsize))) {
42 fprintf(stderr, "failed to allocate backbuffer\n");
46 if(!(vmem_front = set_video_mode(fb_width, fb_height, fb_bpp))) {
49 /* TODO implement multiple video memory pages for flipping */
50 vmem_back = vmem_front;
52 if(demo_init(argc, argv) == -1) {
57 if(opt.sball && sball_init() == 0) {
65 while((key = kb_getkey()) != -1) {
66 demo_keyboard(key, 1);
68 if(quit) goto break_evloop;
71 mouse_bmask = read_mouse(&mouse_x, &mouse_y);
73 if(use_sball && sball_pending()) {
75 printf("got sball event\n");
76 while(sball_getevent(&ev)) {
77 handle_sball_event(&ev);
79 recalc_sball_matrix(sball_matrix);
82 time_msec = get_msec();
101 void swap_buffers(void *pixels)
103 /* TODO implement page flipping */
107 memcpy(vmem_front, pixels, fbsize);
114 #define TX(ev) ((ev)->motion.motion[0])
115 #define TY(ev) ((ev)->motion.motion[1])
116 #define TZ(ev) ((ev)->motion.motion[2])
117 #define RX(ev) ((ev)->motion.motion[3])
118 #define RY(ev) ((ev)->motion.motion[4])
119 #define RZ(ev) ((ev)->motion.motion[5])
121 static int handle_sball_event(sball_event *ev)
124 case SBALL_EV_MOTION:
125 if(RX(ev) | RY(ev) | RZ(ev)) {
126 float rx = (float)RX(ev);
127 float ry = (float)RY(ev);
128 float rz = (float)RZ(ev);
129 float axis_len = sqrt(rx * rx + ry * ry + rz * rz);
131 rot = quat_rotate(rot, axis_len * 0.001, -rx / axis_len,
132 -ry / axis_len, -rz / axis_len);
136 pos.x += TX(ev) * 0.001;
137 pos.y += TY(ev) * 0.001;
138 pos.z += TZ(ev) * 0.001;
141 case SBALL_EV_BUTTON:
142 if(ev->button.pressed) {
143 pos = v3_cons(0, 0, 0);
144 rot = quat_cons(1, 0, 0, 0);
152 void recalc_sball_matrix(float *xform)
154 quat_to_mat(xform, rot);