root / proj / sprite.c @ 160
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| 1 | 152 | up20180642 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | #include "sprite.h" |
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| 4 | |||
| 5 | #include "graphics.h" |
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| 6 | 160 | up20180642 | #include <math.h> |
| 7 | 152 | up20180642 | |
| 8 | struct sprite{
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| 9 | int x, y;
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| 10 | int w, h;
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| 11 | 160 | up20180642 | int u0, v0;
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| 12 | double theta;
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| 13 | 152 | up20180642 | uint8_t *map; |
| 14 | }; |
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| 15 | |||
| 16 | sprite_t* sprite_ctor(const xpm_map_t xpm){
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| 17 | sprite_t *ret = (sprite_t*)malloc(sizeof(sprite_t));
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| 18 | if(ret == NULL) return NULL; |
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| 19 | 160 | up20180642 | enum xpm_image_type type = XPM_8_8_8_8;
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| 20 | 152 | up20180642 | xpm_image_t img; |
| 21 | ret->map = xpm_load(xpm, type, &img); |
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| 22 | if(ret->map == NULL){ |
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| 23 | free(ret); |
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| 24 | return NULL; |
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| 25 | } |
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| 26 | 159 | up20180642 | ret->x = 0;
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| 27 | ret->y = 0;
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| 28 | 152 | up20180642 | ret->w = img.width; |
| 29 | ret->h = img.height; |
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| 30 | 160 | up20180642 | ret->u0 = 0;
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| 31 | ret->v0 = 0;
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| 32 | ret->theta = 0;
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| 33 | 152 | up20180642 | return ret;
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| 34 | } |
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| 35 | |||
| 36 | void sprite_dtor(sprite_t *p){
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| 37 | if(p == NULL) return; |
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| 38 | if(p->map) free(p->map);
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| 39 | free(p); |
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| 40 | } |
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| 41 | |||
| 42 | void sprite_set_x(sprite_t *p, int x){ p->x = x; } |
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| 43 | void sprite_set_y(sprite_t *p, int y){ p->y = y; } |
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| 44 | void sprite_set_pos(sprite_t *p, int x, int y){ |
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| 45 | sprite_set_x(p, x); |
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| 46 | sprite_set_y(p, y); |
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| 47 | } |
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| 48 | 160 | up20180642 | void sprite_set_angle(sprite_t *p, double angle){ p->theta = angle; } |
| 49 | void sprite_set_center(sprite_t *p, int u0, int v0){ |
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| 50 | p->u0 = u0; |
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| 51 | p->v0 = v0; |
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| 52 | } |
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| 53 | 152 | up20180642 | |
| 54 | int sprite_get_w(const sprite_t *p){ return p->w; } |
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| 55 | int sprite_get_h(const sprite_t *p){ return p->h; } |
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| 56 | |||
| 57 | 160 | up20180642 | void sprite_src2pic(const sprite_t *p, int x, int y, int *u, int *v){ |
| 58 | int dx = x - p->x;
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| 59 | int dy = y - p->y;
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| 60 | int du = dx*cos(p->theta) - dy*sin(p->theta);
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| 61 | int dv = dx*sin(p->theta) + dy*cos(p->theta);
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| 62 | *u = du + p->u0; |
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| 63 | *v = dv + p->v0; |
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| 64 | } |
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| 65 | |||
| 66 | 152 | up20180642 | void sprite_draw(const sprite_t *p){ |
| 67 | 160 | up20180642 | const int diag = sqrt(p->w*p->w + p->h*p->h)+2; |
| 68 | int u, v;
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| 69 | for(int y = p->y - diag; y < p->y + diag; ++y){ |
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| 70 | for(int x = p->x - diag; x < p->x + diag; ++x){ |
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| 71 | if (p->x + x < get_XRes() && p->y + y < get_YRes()){
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| 72 | sprite_src2pic(p, x, y, &u, &v); |
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| 73 | if(0 <= u && u < p->w && 0 <= v && v < p->h){ |
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| 74 | uint8_t *m = p->map + (v*p->w + u)*4;
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| 75 | uint32_t color = SET_RGB(*(m+2), *(m+1), *(m)); |
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| 76 | set_pixel_alpha(p->x + x, p->y + y, color, *(m+3));
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| 77 | } |
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| 78 | 152 | up20180642 | } |
| 79 | } |
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| 80 | } |
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| 81 | } |