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             player_layer->color_picker.color,
  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 = player_layer->color_picker.color;
  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     RETURN_LT0(player->lt);
  97 }
  98
  99 int player_render(const Player * player,
 100                   Camera *camera)
 101 {
 102     trace_assert(player);
 103     trace_assert(camera);
 104
 105     char debug_text[256];
 106
 107     switch (player->state) {
 108     case PLAYER_STATE_ALIVE: {
 109         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 110         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 111
 112         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 113             return -1;
 114         }
 115
 116         return rigid_bodies_render(
 117             player->rigid_bodies,
 118             player->alive_body_id,
 119             player->color,
 120             camera);
 121     }
 122
 123     case PLAYER_STATE_DYING:
 124         return explosion_render(player->dying_body, camera);
 125
 126     default: {}
 127     }
 128
 129     return 0;
 130 }
 131
 132 void player_update(Player *player,
 133                    float delta_time)
 134 {
 135     trace_assert(player);
 136
 137     switch (player->state) {
 138     case PLAYER_STATE_ALIVE: {
 139         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 140
 141         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 142
 143
 144         if (hitbox.y > 1000.0f) {
 145             player_die(player);
 146         }
 147     } break;
 148
 149     case PLAYER_STATE_DYING: {
 150         explosion_update(player->dying_body, delta_time);
 151
 152         if (explosion_is_done(player->dying_body)) {
 153             rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, false);
 154             rigid_bodies_transform_velocity(
 155                 player->rigid_bodies,
 156                 player->alive_body_id,
 157                 make_mat3x3(0.0f, 0.0f, 0.0f,
 158                             0.0f, 0.0f, 0.0f,
 159                             0.0f, 0.0f, 1.0f));
 160             rigid_bodies_teleport_to(
 161                 player->rigid_bodies,
 162                 player->alive_body_id,
 163                 player->checkpoint);
 164             player->state = PLAYER_STATE_ALIVE;
 165         }
 166     } break;
 167
 168     default: {}
 169     }
 170 }
 171
 172 void player_move_left(Player *player)
 173 {
 174     trace_assert(player);
 175     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(-PLAYER_SPEED, 0.0f));
 176 }
 177
 178 void player_move_right(Player *player)
 179 {
 180     trace_assert(player);
 181
 182     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(PLAYER_SPEED, 0.0f));
 183 }
 184
 185 void player_stop(Player *player)
 186 {
 187     trace_assert(player);
 188
 189     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(0.0f, 0.0f));
 190 }
 191
 192 void player_jump(Player *player, Script *supa_script)
 193 {
 194     trace_assert(player);
 195     trace_assert(supa_script);
 196
 197     if (rigid_bodies_touches_ground(player->rigid_bodies, player->alive_body_id)) {
 198         player->jump_threshold = 0;
 199     }
 200
 201     if (player->jump_threshold < PLAYER_MAX_JUMP_THRESHOLD) {
 202         rigid_bodies_transform_velocity(
 203             player->rigid_bodies,
 204             player->alive_body_id,
 205             make_mat3x3(1.0f, 0.0f, 0.0f,
 206                         0.0f, 0.0f, 0.0f,
 207                         0.0f, 0.0f, 1.0f));
 208         rigid_bodies_apply_force(
 209             player->rigid_bodies,
 210             player->alive_body_id,
 211             vec(0.0f, -PLAYER_JUMP));
 212         player->jump_threshold++;
 213
 214         if (script_has_scope_value(supa_script, "on-player-jump")) {
 215             Gc *gc = script_gc(supa_script);
 216             script_eval(supa_script, list(gc, "q", "on-player-jump"));
 217         }
 218     }
 219 }
 220
 221 void player_die(Player *player)
 222 {
 223     trace_assert(player);
 224
 225     if (player->state == PLAYER_STATE_ALIVE) {
 226         const Rect hitbox =
 227             rigid_bodies_hitbox(
 228                 player->rigid_bodies,
 229                 player->alive_body_id);
 230
 231         player->play_die_cue = 1;
 232         explosion_start(player->dying_body, vec(hitbox.x, hitbox.y));
 233         player->state = PLAYER_STATE_DYING;
 234         rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, true);
 235     }
 236 }
 237
 238 void player_focus_camera(Player *player,
 239                          Camera *camera)
 240 {
 241     trace_assert(player);
 242     trace_assert(camera);
 243
 244     const Rect player_hitbox = rigid_bodies_hitbox(
 245         player->rigid_bodies,
 246         player->alive_body_id);
 247
 248     camera_center_at(
 249         camera,
 250         vec_sum(
 251             vec(player_hitbox.x, player_hitbox.y),
 252             vec(0.0f, -player_hitbox.h * 0.5f)));
 253 }
 254
 255 void player_hide_goals(const Player *player,
 256                        Goals *goals)
 257 {
 258     trace_assert(player);
 259     trace_assert(goals);
 260     goals_hide_from_player(
 261         goals,
 262         rigid_bodies_hitbox(
 263             player->rigid_bodies,
 264             player->alive_body_id));
 265 }
 266
 267 void player_die_from_lava(Player *player,
 268                           const Lava *lava)
 269 {
 270     if (lava_overlaps_rect(
 271             lava,
 272             rigid_bodies_hitbox(
 273                 player->rigid_bodies,
 274                 player->alive_body_id))) {
 275         player_die(player);
 276     }
 277 }
 278
 279 void player_checkpoint(Player *player, Vec checkpoint)
 280 {
 281     player->checkpoint = checkpoint;
 282 }
 283
 284 int player_sound(Player *player,
 285                  Sound_samples *sound_samples)
 286 {
 287     if (player->play_die_cue) {
 288         player->play_die_cue = 0;
 289
 290         if (sound_samples_play_sound(sound_samples, 0) < 0) {
 291             return -1;
 292         }
 293     }
 294
 295     return 0;
 296 }
 297
 298 bool player_overlaps_rect(const Player *player,
 299                           Rect rect)
 300 {
 301     trace_assert(player);
 302
 303     return player->state == PLAYER_STATE_ALIVE
 304         && rects_overlap(
 305             rect, rigid_bodies_hitbox(
 306                 player->rigid_bodies,
 307                 player->alive_body_id));
 308 }
 309
 310 Rect player_hitbox(const Player *player)
 311 {
 312     return rigid_bodies_hitbox(
 313         player->rigid_bodies,
 314         player->alive_body_id);
 315 }