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/* event.c
*
* Event Handler
*
* notes: It would be useful to create a following function
* register_signal(SDL_HOLDDOWN, EVENT_ACTION_INCR, float *p, float val)
*
* struct platform is still passed globally
*
*/
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include "client.h"
#include "glframe.h"
#include "platform.h"
#include "window.h"
#include "event.h"
extern struct platform p;
extern int program_running;
/* our function table */
static struct event_vtbl event_tbl;
int event_handler_init(struct event_vtbl *tbl)
{
if (!tbl)
return -1;
event_tbl = *tbl;
/* predefined handlers that are automatically provided */
if (!event_tbl.windowresize)
event_tbl.windowresize = window_resize;
return 0;
}
/* process SDL events */
void sdl_process_events(void)
{
SDL_Event event;
SDLKey sym;
static unsigned int keys_held[323];
/* helper flag for event_keydown() */
int flag = 0;
while (SDL_PollEvent(&event))
{
sym = event.key.keysym.sym;
switch (event.type)
{
/* keyboard event */
case SDL_KEYUP:
{
/* reset the key to 0 */
keys_held[sym] = 0;
break;
}
case SDL_KEYDOWN:
{
keys_held[sym] = 1;
if (event_tbl.keydown)
event_tbl.keydown(&event.key.keysym, keys_held, flag);
break;
}
case SDL_VIDEORESIZE:
{
if (event_tbl.windowresize)
event_tbl.windowresize(event.resize.w, event.resize.h);
break;
}
case SDL_QUIT:
{
program_running = 0;
break;
}
default:
break;
}
}
/* below code has to be placed here, check for keys that are being constantly held */
if (keys_held[SDLK_w] || keys_held[SDLK_s] || keys_held[SDLK_a] || keys_held[SDLK_d] ||
keys_held[SDLK_UP] || keys_held[SDLK_DOWN] || keys_held[SDLK_LEFT] || keys_held[SDLK_RIGHT] ||
keys_held[SDLK_n] || keys_held[SDLK_m])
{
flag = !flag;
event_keydown(NULL, keys_held, flag);
}
else
flag = !flag;
}
/* here are the event handler functions */
void event_keydown(SDL_keysym *keysym, const unsigned int *keys_held, const int flag)
{
if (!flag)
{
switch (keysym->sym)
{
case SDLK_ESCAPE: program_running = 0; break;
case SDLK_w: p.c->xrot -= 5.0f; break;
case SDLK_s: p.c->xrot += 5.0f; break;
case SDLK_a: p.c->yrot -= 5.0f; break;
case SDLK_d: p.c->yrot += 5.0f; break;
case SDLK_UP: glframe_move_forward(&p.camera, 0.5f); break;
case SDLK_DOWN: glframe_move_forward(&p.camera, -0.5f); break;
case SDLK_LEFT: glframe_rotate_local_y(&p.camera, 0.1f); break;
case SDLK_RIGHT: glframe_rotate_local_y(&p.camera, -0.1f); break;
case SDLK_n: glframe_rotate_local_x(&p.camera, 0.1f); break;
case SDLK_m: glframe_rotate_local_x(&p.camera, -0.1f); break;
default: break;
}
}
else
{
if (keys_held[SDLK_w])
p.c->xrot -= 5.0f;
if (keys_held[SDLK_s])
p.c->xrot += 5.0f;
if (keys_held[SDLK_a])
p.c->yrot -= 5.0f;
if (keys_held[SDLK_d])
p.c->yrot += 5.0f;
if (keys_held[SDLK_UP])
glframe_move_forward(&p.camera, 0.05f);
if (keys_held[SDLK_DOWN])
glframe_move_forward(&p.camera, -0.05f);
if (keys_held[SDLK_LEFT])
glframe_rotate_local_y(&p.camera, 0.02f);
if (keys_held[SDLK_RIGHT])
glframe_rotate_local_y(&p.camera, -0.02f);
if (keys_held[SDLK_n])
glframe_rotate_local_x(&p.camera, 0.02f);
if (keys_held[SDLK_m])
glframe_rotate_local_x(&p.camera, -0.02f);
}
p.c->xrot = (GLfloat) ((const int) p.c->xrot % 360);
p.c->yrot = (GLfloat) ((const int) p.c->yrot % 360);
}
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