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/vec.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 #include "config.h"
  20
  21 #define PLAYER_WIDTH 25.0f
  22 #define PLAYER_HEIGHT 25.0f
  23 #define PLAYER_SPEED 500.0f
  24 #define PLAYER_JUMP 32000.0f
  25 #define PLAYER_DEATH_DURATION 0.75f
  26 #define PLAYER_MAX_JUMP_THRESHOLD 2
  27
  28 typedef enum Player_state {
  29     PLAYER_STATE_ALIVE = 0,
  30     PLAYER_STATE_DYING
  31 } Player_state;
  32
  33 struct Player {
  34     Lt *lt;
  35     Player_state state;
  36
  37     RigidBodies *rigid_bodies;
  38
  39     RigidBodyId alive_body_id;
  40     Explosion *dying_body;
  41
  42     int jump_threshold;
  43     Color color;
  44
  45     Vec checkpoint;
  46
  47     int play_die_cue;
  48 };
  49
  50 Player *create_player_from_player_layer(const PlayerLayer *player_layer,
  51                                         RigidBodies *rigid_bodies,
  52                                         Broadcast *broadcast)
  53 {
  54     trace_assert(player_layer);
  55     trace_assert(rigid_bodies);
  56     trace_assert(broadcast);
  57
  58     Lt *lt = create_lt();
  59
  60     Player *player = PUSH_LT(lt, nth_calloc(1, sizeof(Player)), free);
  61     if (player == NULL) {
  62         RETURN_LT(lt, NULL);
  63     }
  64     player->lt = lt;
  65
  66     player->rigid_bodies = rigid_bodies;
  67
  68     player->alive_body_id = rigid_bodies_add(
  69         rigid_bodies,
  70         rect(
  71             player_layer->position.x,
  72             player_layer->position.y,
  73             PLAYER_WIDTH,
  74             PLAYER_HEIGHT));
  75
  76     player->dying_body = PUSH_LT(
  77         lt,
  78         create_explosion(
  79             color_picker_rgba(&player_layer->color_picker),
  80             PLAYER_DEATH_DURATION),
  81         destroy_explosion);
  82     if (player->dying_body == NULL) {
  83         RETURN_LT(lt, NULL);
  84     }
  85
  86     player->jump_threshold = 0;
  87     player->color = color_picker_rgba(&player_layer->color_picker);
  88     player->checkpoint = player_layer->position;
  89     player->play_die_cue = 0;
  90     player->state = PLAYER_STATE_ALIVE;
  91
  92     return player;
  93 }
  94
  95 void destroy_player(Player * player)
  96 {
  97     rigid_bodies_remove(player->rigid_bodies, player->alive_body_id);
  98     RETURN_LT0(player->lt);
  99 }
 100
 101 int player_render(const Player * player,
 102                   const Camera *camera)
 103 {
 104     trace_assert(player);
 105     trace_assert(camera);
 106
 107     char debug_text[256];
 108
 109     switch (player->state) {
 110     case PLAYER_STATE_ALIVE: {
 111         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 112         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 113
 114         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 115             return -1;
 116         }
 117
 118         return rigid_bodies_render(
 119             player->rigid_bodies,
 120             player->alive_body_id,
 121             player->color,
 122             camera);
 123     }
 124
 125     case PLAYER_STATE_DYING:
 126         return explosion_render(player->dying_body, camera);
 127
 128     default: {}
 129     }
 130
 131     return 0;
 132 }
 133
 134 void player_update(Player *player,
 135                    float delta_time)
 136 {
 137     trace_assert(player);
 138
 139     switch (player->state) {
 140     case PLAYER_STATE_ALIVE: {
 141         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 142
 143         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 144
 145
 146         if (hitbox.y > PLAYER_DEATH_LEVEL) {
 147             player_die(player);
 148         }
 149     } break;
 150
 151     case PLAYER_STATE_DYING: {
 152         explosion_update(player->dying_body, delta_time);
 153
 154         if (explosion_is_done(player->dying_body)) {
 155             rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, false);
 156             rigid_bodies_transform_velocity(
 157                 player->rigid_bodies,
 158                 player->alive_body_id,
 159                 make_mat3x3(0.0f, 0.0f, 0.0f,
 160                             0.0f, 0.0f, 0.0f,
 161                             0.0f, 0.0f, 1.0f));
 162             rigid_bodies_teleport_to(
 163                 player->rigid_bodies,
 164                 player->alive_body_id,
 165                 player->checkpoint);
 166             player->state = PLAYER_STATE_ALIVE;
 167         }
 168     } break;
 169
 170     default: {}
 171     }
 172 }
 173
 174 void player_move_left(Player *player)
 175 {
 176     trace_assert(player);
 177     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(-PLAYER_SPEED, 0.0f));
 178 }
 179
 180 void player_move_right(Player *player)
 181 {
 182     trace_assert(player);
 183
 184     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(PLAYER_SPEED, 0.0f));
 185 }
 186
 187 void player_stop(Player *player)
 188 {
 189     trace_assert(player);
 190
 191     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(0.0f, 0.0f));
 192 }
 193
 194 void player_jump(Player *player, Script *supa_script)
 195 {
 196     trace_assert(player);
 197     trace_assert(supa_script);
 198
 199     if (rigid_bodies_touches_ground(player->rigid_bodies, player->alive_body_id)) {
 200         player->jump_threshold = 0;
 201     }
 202
 203     if (player->jump_threshold < PLAYER_MAX_JUMP_THRESHOLD) {
 204         rigid_bodies_transform_velocity(
 205             player->rigid_bodies,
 206             player->alive_body_id,
 207             make_mat3x3(1.0f, 0.0f, 0.0f,
 208                         0.0f, 0.0f, 0.0f,
 209                         0.0f, 0.0f, 1.0f));
 210         rigid_bodies_apply_force(
 211             player->rigid_bodies,
 212             player->alive_body_id,
 213             vec(0.0f, -PLAYER_JUMP));
 214         player->jump_threshold++;
 215
 216         if (script_has_scope_value(supa_script, "on-player-jump")) {
 217             Gc *gc = script_gc(supa_script);
 218             script_eval(supa_script, list(gc, "q", "on-player-jump"));
 219         }
 220     }
 221 }
 222
 223 void player_die(Player *player)
 224 {
 225     trace_assert(player);
 226
 227     if (player->state == PLAYER_STATE_ALIVE) {
 228         const Rect hitbox =
 229             rigid_bodies_hitbox(
 230                 player->rigid_bodies,
 231                 player->alive_body_id);
 232
 233         player->play_die_cue = 1;
 234         explosion_start(player->dying_body, vec(hitbox.x, hitbox.y));
 235         player->state = PLAYER_STATE_DYING;
 236         rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, true);
 237     }
 238 }
 239
 240 void player_focus_camera(Player *player,
 241                          Camera *camera)
 242 {
 243     trace_assert(player);
 244     trace_assert(camera);
 245
 246     const Rect player_hitbox = rigid_bodies_hitbox(
 247         player->rigid_bodies,
 248         player->alive_body_id);
 249
 250     camera_center_at(
 251         camera,
 252         vec_sum(
 253             vec(player_hitbox.x, player_hitbox.y),
 254             vec(0.0f, -player_hitbox.h * 0.5f)));
 255 }
 256
 257 void player_hide_goals(const Player *player,
 258                        Goals *goals)
 259 {
 260     trace_assert(player);
 261     trace_assert(goals);
 262     goals_hide_from_player(
 263         goals,
 264         rigid_bodies_hitbox(
 265             player->rigid_bodies,
 266             player->alive_body_id));
 267 }
 268
 269 void player_die_from_lava(Player *player,
 270                           const Lava *lava)
 271 {
 272     if (lava_overlaps_rect(
 273             lava,
 274             rigid_bodies_hitbox(
 275                 player->rigid_bodies,
 276                 player->alive_body_id))) {
 277         player_die(player);
 278     }
 279 }
 280
 281 void player_checkpoint(Player *player, Vec checkpoint)
 282 {
 283     player->checkpoint = checkpoint;
 284 }
 285
 286 int player_sound(Player *player,
 287                  Sound_samples *sound_samples)
 288 {
 289     if (player->play_die_cue) {
 290         player->play_die_cue = 0;
 291
 292         if (sound_samples_play_sound(sound_samples, 0) < 0) {
 293             return -1;
 294         }
 295     }
 296
 297     return 0;
 298 }
 299
 300 bool player_overlaps_rect(const Player *player,
 301                           Rect rect)
 302 {
 303     trace_assert(player);
 304
 305     return player->state == PLAYER_STATE_ALIVE
 306         && rects_overlap(
 307             rect, rigid_bodies_hitbox(
 308                 player->rigid_bodies,
 309                 player->alive_body_id));
 310 }
 311
 312 Rect player_hitbox(const Player *player)
 313 {
 314     return rigid_bodies_hitbox(
 315         player->rigid_bodies,
 316         player->alive_body_id);
 317 }