Revision 168
stuff changed
| sprite.c | ||
|---|---|---|
| 4 | 4 |
|
| 5 | 5 |
#include "graph.h" |
| 6 | 6 |
#include "utils.h" |
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#include "fast_math.h" |
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| 7 | 8 |
#include <math.h> |
| 8 | 9 |
|
| 9 | 10 |
struct sprite{
|
| 10 | 11 |
int16_t x, y; |
| 11 | 12 |
uint16_t w, h; |
| 12 | 13 |
int16_t u0, v0; |
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double theta;
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float theta;
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|
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uint8_t *map; |
| 15 | 16 |
}; |
| 16 | 17 |
|
| ... | ... | |
| 53 | 54 |
void (sprite_src2pic)(const sprite_t *p, int16_t x, int16_t y, int16_t *u, int16_t *v){
|
| 54 | 55 |
int16_t dx = x - p->x; |
| 55 | 56 |
int16_t dy = y - p->y; |
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double s = sin(p->theta); |
|
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double c = cos(p->theta); |
|
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double s = fm_sin(p->theta);
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double c = fm_cos(p->theta);
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|
| 58 | 59 |
*u = dx*c - dy*s + p->u0; |
| 59 | 60 |
*v = dx*s + dy*c + p->v0; |
| 60 | 61 |
} |
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