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// worldocull
extern void computeraytable(float vx, float vy);
extern int isoccluded(float vx, float vy, float cx, float cy, float csize);
// main
extern void fatal(OFString *s, OFString *o = @"");
extern void *alloc(int s);
extern SDL_Window *window;
extern void keyrepeat(bool on);
extern bool keyrepeat;
// rendertext
extern void draw_text(char *str, int left, int top, int gl_num);
extern void draw_textf(char *fstr, int left, int top, int gl_num, ...);
extern int text_width(char *str);
extern void draw_envbox(int t, int fogdist);
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