Revision 192
added zoom/scale
| sprite.c | ||
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| 7 | 7 |
#include "fast_math.h" |
| 8 | 8 |
#include <math.h> |
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struct sprite{
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int16_t x, y;
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struct basic_sprite{
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uint8_t *map;
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uint16_t w, h; |
| 13 | 13 |
int16_t u0, v0; |
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double theta; |
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double scale; |
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uint8_t *map; |
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}; |
| 18 | 15 |
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sprite_t* (sprite_ctor)(const char **xpm, int u0, int v0){
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sprite_t *ret = (sprite_t*)malloc(sizeof(sprite_t));
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basic_sprite_t* (basic_sprite_ctor)(const char **xpm, int16_t u0, int16_t v0){
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basic_sprite_t *ret = malloc(sizeof(basic_sprite_t));
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if(ret == NULL) return NULL; |
| 22 | 19 |
enum xpm_image_type type = XPM_8_8_8_8; |
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xpm_image_t img; |
| ... | ... | |
| 26 | 23 |
free(ret); |
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return NULL; |
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} |
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ret->x = 0; |
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ret->y = 0; |
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ret->w = img.width; |
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ret->h = img.height; |
| 33 | 28 |
ret->u0 = u0; |
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ret->v0 = u0; |
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ret->theta = 0; |
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ret->scale = 1; |
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ret->v0 = v0; |
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return ret; |
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} |
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void (sprite_dtor)(sprite_t *p){
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void (basic_sprite_dtor)(basic_sprite_t *p){
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if(p == NULL) return; |
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free(p->map); |
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free(p); |
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} |
| 44 | 37 |
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const uint8_t* (basic_sprite_get_map)(const basic_sprite_t *p){ return p->map; }
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uint16_t (basic_sprite_get_w) (const basic_sprite_t *p){ return p->w ; }
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uint16_t (basic_sprite_get_h) (const basic_sprite_t *p){ return p->h ; }
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int16_t (basic_sprite_get_u0) (const basic_sprite_t *p){ return p->u0 ; }
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int16_t (basic_sprite_get_v0) (const basic_sprite_t *p){ return p->v0 ; }
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struct sprite{
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const basic_sprite_t *bsp; |
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int16_t x, y; //position in screen |
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double theta; |
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double scale; |
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}; |
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sprite_t* (sprite_ctor)(const basic_sprite_t *bsp){
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sprite_t *ret = malloc(sizeof(sprite_t)); |
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if(ret == NULL) return NULL; |
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ret->bsp = bsp; |
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ret->x = 0; |
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ret->y = 0; |
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ret->theta = 0.0; |
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ret->scale = 1.0; |
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return ret; |
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} |
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void (sprite_dtor)(sprite_t *p){
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if(p == NULL) return; |
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free(p); |
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} |
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void (sprite_set_pos) (sprite_t *p, int16_t x , int16_t y ){ p->x = x; p->y = y; }
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void (sprite_set_center)(sprite_t *p, int16_t u0, int16_t v0){ p->u0 = u0; p->v0 = v0; }
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void (sprite_set_angle) (sprite_t *p, double angle ){ p->theta = angle; }
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| 48 | 68 |
void (sprite_set_scale) (sprite_t *p, double scale ){ p->scale = scale; }
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int16_t (sprite_get_x)(const sprite_t *p){ return p->x; }
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| 50 | 70 |
int16_t (sprite_get_y)(const sprite_t *p){ return p->y; }
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uint16_t (sprite_get_w)(const sprite_t *p){ return p->w; }
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uint16_t (sprite_get_h)(const sprite_t *p){ return p->h; }
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| 53 | 71 |
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void (sprite_src2pic)(const sprite_t *p, int16_t x, int16_t y, int16_t *u, int16_t *v){
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double s = fm_sin(p->theta); |
| ... | ... | |
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double dy = (y - p->y)/p->scale; |
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int16_t du = dx*c - dy*s + 0.5; |
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int16_t dv = dx*s + dy*c + 0.5; |
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*u = du + p->u0;
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*v = dv + p->v0;
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*u = du + basic_sprite_get_u0(p->bsp);
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*v = dv + basic_sprite_get_v0(p->bsp);
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} |
| 64 | 82 |
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void (sprite_pic2src)(const sprite_t *p, int16_t u, int16_t v, int16_t *x, int16_t *y){
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double s = fm_sin(p->theta); |
| 67 | 85 |
double c = fm_cos(p->theta); |
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int16_t du = u - p->u0;
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int16_t dv = v - p->v0;
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int16_t du = u - basic_sprite_get_u0(p->bsp);
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int16_t dv = v - basic_sprite_get_v0(p->bsp);
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double dx = du*c + dv*s; |
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double dy = -du*s + dv*c; |
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*x = dx*p->scale + 0.5 + p->x; |
| ... | ... | |
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} |
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void (sprite_draw)(const sprite_t *p){
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const uint16_t w = basic_sprite_get_w(p->bsp); |
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const uint16_t h = basic_sprite_get_h(p->bsp); |
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int16_t xmin, xmax, ymin, ymax; {
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int16_t x, y; |
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sprite_pic2src(p, 0 , 0 , &x, &y);
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sprite_pic2src(p, 0, 0, &x, &y);
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xmin = x; xmax = x; ymin = y; ymax = y; |
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sprite_pic2src(p, p->w, 0 , &x, &y);
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sprite_pic2src(p, w, 0, &x, &y);
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xmin = min(x, xmin); xmax = max(x, xmax); ymin = min(y, ymin); ymax = max(y, ymax); |
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sprite_pic2src(p, 0 , p->h, &x, &y);
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sprite_pic2src(p, 0, h, &x, &y);
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xmin = min(x, xmin); xmax = max(x, xmax); ymin = min(y, ymin); ymax = max(y, ymax); |
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sprite_pic2src(p, p->w, p->h, &x, &y);
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sprite_pic2src(p, w, h, &x, &y);
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| 86 | 106 |
xmin = min(x, xmin); xmax = max(x, xmax); ymin = min(y, ymin); ymax = max(y, ymax); |
| 87 | 107 |
xmin = max(xmin-2, 0); xmax = min(xmax+2, graph_get_XRes()); |
| 88 | 108 |
ymin = max(ymin-2, 0); ymax = min(ymax+2, graph_get_YRes()); |
| 89 | 109 |
} |
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const uint8_t *map = basic_sprite_get_map(p->bsp); |
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int16_t u, v; |
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for(int16_t y = ymin; y < ymax; ++y){
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for(int16_t x = xmin; x < xmax; ++x){
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//const int16_t diag = p->scale*sqrt(p->w*p->w + p->h*p->h)+2; |
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//for(int16_t y = max(0,p->y-diag); y < min(p->y+diag,graph_get_YRes()); ++y){
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// for(int16_t x = max(0,p->x-diag); x < min(p->x+diag,graph_get_XRes()); ++x){
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sprite_src2pic(p, x, y, &u, &v); |
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if(0 <= u && u < p->w && 0 <= v && v < p->h){
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uint32_t c = *(uint32_t*)(p->map + (v*p->w + u)*4);
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if(0 <= u && u < w && 0 <= v && v < h){
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uint32_t c = *(uint32_t*)(map + (v*w + u)*4);
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graph_set_pixel_alpha(x, y, GET_COLOR(c), GET_ALP(c)); |
| 100 | 118 |
} |
| 101 | 119 |
} |
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