src/game/level/level_editor.c

   1 #include <stdbool.h>
   2
   3 #include "game/camera.h"
   4 #include "game/level/boxes.h"
   5 #include "game/level/level_editor/proto_rect.h"
   6 #include "game/level/level_editor/color_picker.h"
   7 #include "system/stacktrace.h"
   8 #include "system/nth_alloc.h"
   9
  10 #include "level_editor.h"
  11
  12 struct LevelEditor
  13 {
  14     Vec camera_position;
  15     float camera_scale;
  16     ProtoRect proto_rect;
  17     ColorPicker color_picker;
  18     Boxes *boxes;
  19 };
  20
  21 LevelEditor *create_level_editor(Boxes *boxes)
  22 {
  23     LevelEditor *level_editor = nth_calloc(1, sizeof(LevelEditor));
  24     if (level_editor == NULL) {
  25         return NULL;
  26     }
  27
  28     level_editor->camera_position = vec(0.0f, 0.0f);
  29     level_editor->camera_scale = 1.0f;
  30     level_editor->boxes = boxes;
  31     level_editor->proto_rect.color = rgba(1.0f, 0.0f, 0.0f, 1.0f);
  32     level_editor->color_picker.position = vec(0.0f, 0.0f);
  33     level_editor->color_picker.proto_rect = &level_editor->proto_rect;
  34
  35     return level_editor;
  36 }
  37
  38 void destroy_level_editor(LevelEditor *level_editor)
  39 {
  40     trace_assert(level_editor);
  41     free(level_editor);
  42 }
  43
  44 int level_editor_render(const LevelEditor *level_editor,
  45                         Camera *camera)
  46 {
  47     trace_assert(level_editor);
  48     trace_assert(camera);
  49
  50     if (proto_rect_render(&level_editor->proto_rect, camera) < 0) {
  51         return -1;
  52     }
  53
  54     if (color_picker_render(&level_editor->color_picker, camera) < 0) {
  55         return -1;
  56     }
  57
  58     return 0;
  59 }
  60
  61 int level_editor_update(LevelEditor *level_editor,
  62                         float delta_time)
  63 {
  64     trace_assert(level_editor);
  65
  66     if (proto_rect_update(&level_editor->proto_rect, delta_time) < 0) {
  67         return -1;
  68     }
  69
  70     return 0;
  71 }
  72
  73 int level_editor_event(LevelEditor *level_editor,
  74                        const SDL_Event *event,
  75                        const Camera *camera)
  76 {
  77     trace_assert(level_editor);
  78     trace_assert(event);
  79
  80     switch (event->type) {
  81     case SDL_MOUSEMOTION: {
  82         const float sens = 1.0f / level_editor->camera_scale * 0.25f;
  83         vec_add(&level_editor->camera_position,
  84                 vec((float) event->motion.xrel * sens, (float) event->motion.yrel * sens));
  85     } break;
  86
  87     case SDL_MOUSEWHEEL: {
  88         // TODO(#679): zooming in edit mode is not smooth enough
  89         if (event->wheel.y > 0) {
  90             level_editor->camera_scale += 0.1f;
  91         } else if (event->wheel.y < 0) {
  92             level_editor->camera_scale = fmaxf(0.1f, level_editor->camera_scale - 0.1f);
  93         }
  94     } break;
  95     }
  96
  97     if (proto_rect_event(
  98             &level_editor->proto_rect,
  99             event,
 100             camera,
 101             level_editor->boxes) < 0) {
 102         return -1;
 103     }
 104
 105     if (color_picker_event(&level_editor->color_picker, event) < 0) {
 106         return -1;
 107     }
 108
 109     return 0;
 110 }
 111
 112 int level_editor_focus_camera(LevelEditor *level_editor,
 113                               Camera *camera)
 114 {
 115     camera_center_at(camera, level_editor->camera_position);
 116     camera_scale(camera, level_editor->camera_scale);
 117     return 0;
 118 }