src/game/level/platforms.c

   1 #include <SDL2/SDL.h>
   2 #include "system/stacktrace.h"
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <errno.h>
   7
   8 #include "platforms.h"
   9 #include "system/lt.h"
  10 #include "system/lt/lt_adapters.h"
  11 #include "system/line_stream.h"
  12 #include "system/nth_alloc.h"
  13 #include "system/log.h"
  14 #include "game/level/level_editor/rect_layer.h"
  15
  16 struct Platforms {
  17     Lt *lt;
  18
  19     Rect *rects;
  20     Color *colors;
  21     size_t rects_size;
  22 };
  23
  24 Platforms *create_platforms_from_rect_layer(const RectLayer *layer)
  25 {
  26     trace_assert(layer);
  27
  28     Lt *lt = create_lt();
  29
  30     Platforms *platforms = PUSH_LT(
  31         lt,
  32         nth_calloc(1, sizeof(Platforms)),
  33         free);
  34     if (platforms == NULL) {
  35         RETURN_LT(lt, NULL);
  36     }
  37     platforms->lt = lt;
  38
  39     platforms->rects_size = rect_layer_count(layer);
  40
  41     platforms->rects = PUSH_LT(lt, nth_calloc(1, sizeof(Rect) * platforms->rects_size), free);
  42     if (platforms->rects == NULL) {
  43         RETURN_LT(lt, NULL);
  44     }
  45     memcpy(platforms->rects, rect_layer_rects(layer), sizeof(Rect) * platforms->rects_size);
  46
  47
  48     platforms->colors = PUSH_LT(lt, nth_calloc(1, sizeof(Color) * platforms->rects_size), free);
  49     if (platforms->colors == NULL) {
  50         RETURN_LT(lt, NULL);
  51     }
  52     memcpy(platforms->colors, rect_layer_colors(layer), sizeof(Color) * platforms->rects_size);
  53
  54     return platforms;
  55 }
  56
  57 void destroy_platforms(Platforms *platforms)
  58 {
  59     trace_assert(platforms);
  60     RETURN_LT0(platforms->lt);
  61 }
  62
  63 /* TODO(#450): platforms do not render their ids in debug mode */
  64 int platforms_render(const Platforms *platforms,
  65                      Camera *camera)
  66 {
  67     for (size_t i = 0; i < platforms->rects_size; ++i) {
  68         if (camera_fill_rect(
  69                 camera,
  70                 platforms->rects[i],
  71                 platforms->colors[i]) < 0) {
  72             return -1;
  73         }
  74     }
  75
  76     return 0;
  77 }
  78
  79 void platforms_touches_rect_sides(const Platforms *platforms,
  80                                   Rect object,
  81                                   int sides[RECT_SIDE_N])
  82 {
  83     trace_assert(platforms);
  84
  85     for (size_t i = 0; i < platforms->rects_size; ++i) {
  86         rect_object_impact(object, platforms->rects[i], sides);
  87     }
  88 }
  89
  90 Vec platforms_snap_rect(const Platforms *platforms,
  91                          Rect *object)
  92 {
  93     trace_assert(platforms);
  94
  95     Vec result = vec(1.0f, 1.0f);
  96     for (size_t i = 0; i < platforms->rects_size; ++i) {
  97         if (rects_overlap(platforms->rects[i], *object)) {
  98             result = vec_entry_mult(result, rect_snap(platforms->rects[i], object));
  99         }
 100     }
 101
 102     return result;
 103 }