src/game/level/player.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include <SDL.h>
   5
   6 #include "game/level/explosion.h"
   7 #include "game/level/script.h"
   8 #include "game/level/rigid_bodies.h"
   9 #include "goals.h"
  10 #include "math/point.h"
  11 #include "platforms.h"
  12 #include "player.h"
  13 #include "system/line_stream.h"
  14 #include "system/log.h"
  15 #include "system/lt.h"
  16 #include "system/nth_alloc.h"
  17 #include "system/stacktrace.h"
  18 #include "ebisp/builtins.h"
  19
  20 #define PLAYER_WIDTH 25.0f
  21 #define PLAYER_HEIGHT 25.0f
  22 #define PLAYER_SPEED 500.0f
  23 #define PLAYER_JUMP 32000.0f
  24 #define PLAYER_DEATH_DURATION 0.75f
  25 #define PLAYER_MAX_JUMP_THRESHOLD 2
  26
  27 typedef enum Player_state {
  28     PLAYER_STATE_ALIVE = 0,
  29     PLAYER_STATE_DYING
  30 } Player_state;
  31
  32 struct Player {
  33     Lt *lt;
  34     Player_state state;
  35
  36     RigidBodies *rigid_bodies;
  37
  38     RigidBodyId alive_body_id;
  39     Explosion *dying_body;
  40
  41     int jump_threshold;
  42     Color color;
  43
  44     Vec checkpoint;
  45
  46     int play_die_cue;
  47 };
  48
  49 Player *create_player_from_player_layer(const PlayerLayer *player_layer,
  50                                         RigidBodies *rigid_bodies,
  51                                         Broadcast *broadcast)
  52 {
  53     trace_assert(player_layer);
  54     trace_assert(rigid_bodies);
  55     trace_assert(broadcast);
  56
  57     Lt *lt = create_lt();
  58
  59     Player *player = PUSH_LT(lt, nth_calloc(1, sizeof(Player)), free);
  60     if (player == NULL) {
  61         RETURN_LT(lt, NULL);
  62     }
  63     player->lt = lt;
  64
  65     player->rigid_bodies = rigid_bodies;
  66
  67     player->alive_body_id = rigid_bodies_add(
  68         rigid_bodies,
  69         rect(
  70             player_layer->position.x,
  71             player_layer->position.y,
  72             PLAYER_WIDTH,
  73             PLAYER_HEIGHT));
  74
  75     player->dying_body = PUSH_LT(
  76         lt,
  77         create_explosion(
  78             color_picker_rgba(&player_layer->color_picker),
  79             PLAYER_DEATH_DURATION),
  80         destroy_explosion);
  81     if (player->dying_body == NULL) {
  82         RETURN_LT(lt, NULL);
  83     }
  84
  85     player->jump_threshold = 0;
  86     player->color = color_picker_rgba(&player_layer->color_picker);
  87     player->checkpoint = player_layer->position;
  88     player->play_die_cue = 0;
  89     player->state = PLAYER_STATE_ALIVE;
  90
  91     return player;
  92 }
  93
  94 void destroy_player(Player * player)
  95 {
  96     rigid_bodies_remove(player->rigid_bodies, player->alive_body_id);
  97     RETURN_LT0(player->lt);
  98 }
  99
 100 int player_render(const Player * player,
 101                   Camera *camera)
 102 {
 103     trace_assert(player);
 104     trace_assert(camera);
 105
 106     char debug_text[256];
 107
 108     switch (player->state) {
 109     case PLAYER_STATE_ALIVE: {
 110         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 111         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 112
 113         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 114             return -1;
 115         }
 116
 117         return rigid_bodies_render(
 118             player->rigid_bodies,
 119             player->alive_body_id,
 120             player->color,
 121             camera);
 122     }
 123
 124     case PLAYER_STATE_DYING:
 125         return explosion_render(player->dying_body, camera);
 126
 127     default: {}
 128     }
 129
 130     return 0;
 131 }
 132
 133 void player_update(Player *player,
 134                    float delta_time)
 135 {
 136     trace_assert(player);
 137
 138     switch (player->state) {
 139     case PLAYER_STATE_ALIVE: {
 140         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 141
 142         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 143
 144
 145         if (hitbox.y > 1000.0f) {
 146             player_die(player);
 147         }
 148     } break;
 149
 150     case PLAYER_STATE_DYING: {
 151         explosion_update(player->dying_body, delta_time);
 152
 153         if (explosion_is_done(player->dying_body)) {
 154             rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, false);
 155             rigid_bodies_transform_velocity(
 156                 player->rigid_bodies,
 157                 player->alive_body_id,
 158                 make_mat3x3(0.0f, 0.0f, 0.0f,
 159                             0.0f, 0.0f, 0.0f,
 160                             0.0f, 0.0f, 1.0f));
 161             rigid_bodies_teleport_to(
 162                 player->rigid_bodies,
 163                 player->alive_body_id,
 164                 player->checkpoint);
 165             player->state = PLAYER_STATE_ALIVE;
 166         }
 167     } break;
 168
 169     default: {}
 170     }
 171 }
 172
 173 void player_move_left(Player *player)
 174 {
 175     trace_assert(player);
 176     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(-PLAYER_SPEED, 0.0f));
 177 }
 178
 179 void player_move_right(Player *player)
 180 {
 181     trace_assert(player);
 182
 183     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(PLAYER_SPEED, 0.0f));
 184 }
 185
 186 void player_stop(Player *player)
 187 {
 188     trace_assert(player);
 189
 190     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(0.0f, 0.0f));
 191 }
 192
 193 void player_jump(Player *player, Script *supa_script)
 194 {
 195     trace_assert(player);
 196     trace_assert(supa_script);
 197
 198     if (rigid_bodies_touches_ground(player->rigid_bodies, player->alive_body_id)) {
 199         player->jump_threshold = 0;
 200     }
 201
 202     if (player->jump_threshold < PLAYER_MAX_JUMP_THRESHOLD) {
 203         rigid_bodies_transform_velocity(
 204             player->rigid_bodies,
 205             player->alive_body_id,
 206             make_mat3x3(1.0f, 0.0f, 0.0f,
 207                         0.0f, 0.0f, 0.0f,
 208                         0.0f, 0.0f, 1.0f));
 209         rigid_bodies_apply_force(
 210             player->rigid_bodies,
 211             player->alive_body_id,
 212             vec(0.0f, -PLAYER_JUMP));
 213         player->jump_threshold++;
 214
 215         if (script_has_scope_value(supa_script, "on-player-jump")) {
 216             Gc *gc = script_gc(supa_script);
 217             script_eval(supa_script, list(gc, "q", "on-player-jump"));
 218         }
 219     }
 220 }
 221
 222 void player_die(Player *player)
 223 {
 224     trace_assert(player);
 225
 226     if (player->state == PLAYER_STATE_ALIVE) {
 227         const Rect hitbox =
 228             rigid_bodies_hitbox(
 229                 player->rigid_bodies,
 230                 player->alive_body_id);
 231
 232         player->play_die_cue = 1;
 233         explosion_start(player->dying_body, vec(hitbox.x, hitbox.y));
 234         player->state = PLAYER_STATE_DYING;
 235         rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, true);
 236     }
 237 }
 238
 239 void player_focus_camera(Player *player,
 240                          Camera *camera)
 241 {
 242     trace_assert(player);
 243     trace_assert(camera);
 244
 245     const Rect player_hitbox = rigid_bodies_hitbox(
 246         player->rigid_bodies,
 247         player->alive_body_id);
 248
 249     camera_center_at(
 250         camera,
 251         vec_sum(
 252             vec(player_hitbox.x, player_hitbox.y),
 253             vec(0.0f, -player_hitbox.h * 0.5f)));
 254 }
 255
 256 void player_hide_goals(const Player *player,
 257                        Goals *goals)
 258 {
 259     trace_assert(player);
 260     trace_assert(goals);
 261     goals_hide_from_player(
 262         goals,
 263         rigid_bodies_hitbox(
 264             player->rigid_bodies,
 265             player->alive_body_id));
 266 }
 267
 268 void player_die_from_lava(Player *player,
 269                           const Lava *lava)
 270 {
 271     if (lava_overlaps_rect(
 272             lava,
 273             rigid_bodies_hitbox(
 274                 player->rigid_bodies,
 275                 player->alive_body_id))) {
 276         player_die(player);
 277     }
 278 }
 279
 280 void player_checkpoint(Player *player, Vec checkpoint)
 281 {
 282     player->checkpoint = checkpoint;
 283 }
 284
 285 int player_sound(Player *player,
 286                  Sound_samples *sound_samples)
 287 {
 288     if (player->play_die_cue) {
 289         player->play_die_cue = 0;
 290
 291         if (sound_samples_play_sound(sound_samples, 0) < 0) {
 292             return -1;
 293         }
 294     }
 295
 296     return 0;
 297 }
 298
 299 bool player_overlaps_rect(const Player *player,
 300                           Rect rect)
 301 {
 302     trace_assert(player);
 303
 304     return player->state == PLAYER_STATE_ALIVE
 305         && rects_overlap(
 306             rect, rigid_bodies_hitbox(
 307                 player->rigid_bodies,
 308                 player->alive_body_id));
 309 }
 310
 311 Rect player_hitbox(const Player *player)
 312 {
 313     return rigid_bodies_hitbox(
 314         player->rigid_bodies,
 315         player->alive_body_id);
 316 }