UI sprites

[gbajam22] / src / level.c

diff --git a/src/level.c b/src/level.c
index 0ae8d3e..d74d52f 100644 (file)
--- a/src/level.c
+++ b/src/level.c
@@ -1,11 +1,13 @@
 #include "util.h"
 #include "debug.h"
 #include "level.h"
+#include "player.h"
+#include "xgl.h"
 
 struct level *init_level(const char *descstr)
 {
        const char *str, *line;
-       int i, j, ncols = 0, nrows = 0;
+       int i, j, x, ncols = 0, nrows = 0;
        struct level *lvl;
        struct cell *cell;
 
@@ -33,10 +35,19 @@ struct level *init_level(const char *descstr)
        lvl->width = ncols;
        lvl->xmask = ncols - 1;
        lvl->height = nrows;
+       lvl->orgx = lvl->width >> 1;
+       lvl->orgy = lvl->height >> 1;
        lvl->cells = calloc_nf(ncols * nrows, sizeof *lvl->cells);
        lvl->mobs = 0;
        lvl->items = 0;
 
+       lvl->xshift = 0;
+       x = ncols - 1;
+       while(x) {
+               x >>= 1;
+               lvl->xshift++;
+       }
+
        str = descstr;
        cell = lvl->cells;
 
@@ -48,6 +59,12 @@ struct level *init_level(const char *descstr)
                                cell->type = CELL_SOLID;
                        } else {
                                cell->type = CELL_WALK;
+                               switch(*str) {
+                               case 's':
+                                       lvl->orgx = j;
+                                       lvl->orgy = i;
+                                       break;
+                               }
                        }
                        cell++;
                        while(*++str == '\n') str++;
@@ -75,28 +92,84 @@ void free_level(struct level *lvl)
        }
 }
 
-void upd_vis(struct level *lvl, int32_t px, int32_t py, int32_t angle)
+struct cell *level_cell(struct level *lvl, int cx, int cy)
 {
-       int cx, cy;
+       return lvl->cells + (cy << lvl->xshift) + cx;
+}
 
-       lvl->numvis = 0;
+/* generated with tools/vistab */
+struct {int dx, dy;} visoffs[8][32] = {
+       /* dir 0 */
+       {{-4,-4}, {4,-4}, {-3,-4}, {3,-4}, {-2,-4}, {2,-4}, {-3,-3}, {3,-3}, {-1,-4},
+        {1,-4}, {0,-4}, {-2,-3}, {2,-3}, {-1,-3}, {1,-3}, {0,-3}, {-2,-2}, {2,-2},
+        {-1,-2}, {1,-2}, {0,-2}, {-1,-1}, {1,-1}, {0,-1}, {0,0}},
+       /* dir 1 */
+       {{4,-4}, {3,-4}, {4,-3}, {2,-4}, {4,-2}, {3,-3}, {1,-4}, {4,-1}, {0,-4},
+        {4,0}, {2,-3}, {3,-2}, {1,-3}, {3,-1}, {0,-3}, {3,0}, {2,-2}, {1,-2},
+        {2,-1}, {0,-2}, {2,0}, {1,-1}, {0,-1}, {1,0}, {0,0}},
+       /* dir 2 */
+       {{4,-4}, {4,4}, {4,-3}, {4,3}, {4,-2}, {4,2}, {3,-3}, {3,3}, {4,-1}, {4,1},
+        {4,0}, {3,-2}, {3,2}, {3,-1}, {3,1}, {3,0}, {2,-2}, {2,2}, {2,-1}, {2,1},
+        {2,0}, {1,-1}, {1,1}, {1,0}, {0,0}},
+       /* dir 3 */
+       {{4,4}, {4,3}, {3,4}, {4,2}, {2,4}, {3,3}, {4,1}, {1,4}, {4,0}, {0,4},
+        {3,2}, {2,3}, {3,1}, {1,3}, {3,0}, {0,3}, {2,2}, {2,1}, {1,2}, {2,0},
+        {0,2}, {1,1}, {1,0}, {0,1}, {0,0}},
+       /* dir 4 */
+       {{-4,4}, {4,4}, {-3,4}, {3,4}, {-2,4}, {2,4}, {-3,3}, {3,3}, {-1,4}, {1,4},
+        {0,4}, {-2,3}, {2,3}, {-1,3}, {1,3}, {0,3}, {-2,2}, {2,2}, {-1,2}, {1,2},
+        {0,2}, {-1,1}, {1,1}, {0,1}, {0,0}},
+       /* dir 5 */
+       {{-4,4}, {-4,3}, {-3,4}, {-4,2}, {-2,4}, {-3,3}, {-4,1}, {-1,4}, {-4,0},
+        {0,4}, {-3,2}, {-2,3}, {-3,1}, {-1,3}, {-3,0}, {0,3}, {-2,2}, {-2,1},
+        {-1,2}, {-2,0}, {0,2}, {-1,1}, {-1,0}, {0,1}, {0,0}},
+       /* dir 6 */
+       {{-4,-4}, {-4,4}, {-4,-3}, {-4,3}, {-4,-2}, {-4,2}, {-3,-3}, {-3,3}, {-4,-1},
+        {-4,1}, {-4,0}, {-3,-2}, {-3,2}, {-3,-1}, {-3,1}, {-3,0}, {-2,-2}, {-2,2},
+        {-2,-1}, {-2,1}, {-2,0}, {-1,-1}, {-1,1}, {-1,0}, {0,0}},
+       /* dir 7 */
+       {{-4,-4}, {-3,-4}, {-4,-3}, {-2,-4}, {-4,-2}, {-3,-3}, {-1,-4}, {-4,-1},
+        {0,-4}, {-4,0}, {-2,-3}, {-3,-2}, {-1,-3}, {-3,-1}, {0,-3}, {-3,0}, {-2,-2},
+        {-1,-2}, {-2,-1}, {0,-2}, {-2,0}, {-1,-1}, {0,-1}, {-1,0}, {0,0}}
+};
+
+void upd_vis(struct level *lvl, struct player *p)
+{
+       int dir, idx;
+       int x, y;
+       struct cell *cptr;
+       int32_t theta;
 
-       pos_to_cell(px, py, &cx, &cy);
+       pos_to_cell(lvl, p->x, p->y, &p->cx, &p->cy);
 
-       /* TODO: cont. */
+       lvl->numvis = 0;
+       idx = -1;
+       theta = X_2PI - p->theta + X_2PI / 16;
+       if(theta >= X_2PI) theta -= X_2PI;
+       dir = (theta << 3) / X_2PI;     /* p->theta is always [0, 2pi) */
+       if(dir < 0 || dir >= 8) {
+               panic(get_pc(), "dir: %d\ntheta: %d.%d (%d)\n", dir, p->theta >> 16,
+                               p->theta & 0xffff, p->theta);
+       }
+       do {
+               idx++;
+               x = p->cx + visoffs[dir][idx].dx;
+               y = p->cy + visoffs[dir][idx].dy;
+               cptr = lvl->cells + y * lvl->width + x;
+               if(cptr->type != CELL_SOLID) {
+                       lvl->vis[lvl->numvis++] = cptr;
+               }
+       } while(visoffs[dir][idx].dx | visoffs[dir][idx].dy);
 }
 
-void cell_to_pos(int cx, int cy, int32_t *px, int32_t *py)
+void cell_to_pos(struct level *lvl, int cx, int cy, int32_t *px, int32_t *py)
 {
-       *px = cx * CELL_SIZE - (CELL_SIZE >> 1);
-       *py = cy * CELL_SIZE - (CELL_SIZE >> 1);
+       *px = (cx - lvl->orgx) * CELL_SIZE;
+       *py = (cy - lvl->orgy) * CELL_SIZE;
 }
 
-void pos_to_cell(int32_t px, int32_t py, int *cx, int *cy)
+void pos_to_cell(struct level *lvl, int32_t px, int32_t py, int *cx, int *cy)
 {
-       _Static_assert((CELL_SIZE & ~0xff) == CELL_SIZE,
-                       "CELL_SIZE >> 8 in pos_to_cell will lose significant bits");
-
-       *cx = ((px + (CELL_SIZE >> 1)) << 8) / (CELL_SIZE >> 8);
-       *cy = ((py + (CELL_SIZE >> 1)) << 8) / (CELL_SIZE >> 8);
+       *cx = (px + (CELL_SIZE >> 1)) / CELL_SIZE + lvl->orgx;
+       *cy = (py + (CELL_SIZE >> 1)) / CELL_SIZE + lvl->orgy;
 }