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/rigid_bodies.h"
   8 #include "goals.h"
   9 #include "math/vec.h"
  10 #include "platforms.h"
  11 #include "player.h"
  12 #include "system/line_stream.h"
  13 #include "system/log.h"
  14 #include "system/lt.h"
  15 #include "system/nth_alloc.h"
  16 #include "system/stacktrace.h"
  17 #include "config.h"
  18
  19 #define PLAYER_WIDTH 25.0f
  20 #define PLAYER_HEIGHT 25.0f
  21 #define PLAYER_SPEED 500.0f
  22 #define PLAYER_JUMP 32000.0f
  23 #define PLAYER_DEATH_DURATION 0.75f
  24 #define PLAYER_MAX_JUMP_THRESHOLD 2
  25
  26 typedef enum Player_state {
  27     PLAYER_STATE_ALIVE = 0,
  28     PLAYER_STATE_DYING
  29 } Player_state;
  30
  31 struct Player {
  32     Lt *lt;
  33     Player_state state;
  34
  35     RigidBodies *rigid_bodies;
  36
  37     RigidBodyId alive_body_id;
  38     Explosion *dying_body;
  39
  40     int jump_threshold;
  41     Color color;
  42
  43     Vec2f checkpoint;
  44
  45     int play_die_cue;
  46 };
  47
  48 Player *create_player_from_player_layer(const PlayerLayer *player_layer,
  49                                         RigidBodies *rigid_bodies)
  50 {
  51     trace_assert(player_layer);
  52     trace_assert(rigid_bodies);
  53
  54     Lt *lt = create_lt();
  55
  56     Player *player = PUSH_LT(lt, nth_calloc(1, sizeof(Player)), free);
  57     if (player == NULL) {
  58         RETURN_LT(lt, NULL);
  59     }
  60     player->lt = lt;
  61
  62     player->rigid_bodies = rigid_bodies;
  63
  64     player->alive_body_id = rigid_bodies_add(
  65         rigid_bodies,
  66         rect(
  67             player_layer->position.x,
  68             player_layer->position.y,
  69             PLAYER_WIDTH,
  70             PLAYER_HEIGHT));
  71
  72     player->dying_body = PUSH_LT(
  73         lt,
  74         create_explosion(
  75             color_picker_rgba(&player_layer->color_picker),
  76             PLAYER_DEATH_DURATION),
  77         destroy_explosion);
  78     if (player->dying_body == NULL) {
  79         RETURN_LT(lt, NULL);
  80     }
  81
  82     player->jump_threshold = 0;
  83     player->color = color_picker_rgba(&player_layer->color_picker);
  84     player->checkpoint = player_layer->position;
  85     player->play_die_cue = 0;
  86     player->state = PLAYER_STATE_ALIVE;
  87
  88     return player;
  89 }
  90
  91 void destroy_player(Player * player)
  92 {
  93     rigid_bodies_remove(player->rigid_bodies, player->alive_body_id);
  94     RETURN_LT0(player->lt);
  95 }
  96
  97 int player_render(const Player * player,
  98                   const Camera *camera)
  99 {
 100     trace_assert(player);
 101     trace_assert(camera);
 102
 103     char debug_text[256];
 104
 105     switch (player->state) {
 106     case PLAYER_STATE_ALIVE: {
 107         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 108         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 109
 110         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 111             return -1;
 112         }
 113
 114         return rigid_bodies_render(
 115             player->rigid_bodies,
 116             player->alive_body_id,
 117             player->color,
 118             camera);
 119     }
 120
 121     case PLAYER_STATE_DYING:
 122         return explosion_render(player->dying_body, camera);
 123
 124     default: {}
 125     }
 126
 127     return 0;
 128 }
 129
 130 void player_update(Player *player,
 131                    float delta_time)
 132 {
 133     trace_assert(player);
 134
 135     switch (player->state) {
 136     case PLAYER_STATE_ALIVE: {
 137         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 138
 139         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 140
 141
 142         if (hitbox.y > PLAYER_DEATH_LEVEL) {
 143             player_die(player);
 144         }
 145     } break;
 146
 147     case PLAYER_STATE_DYING: {
 148         explosion_update(player->dying_body, delta_time);
 149
 150         if (explosion_is_done(player->dying_body)) {
 151             rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, false);
 152             rigid_bodies_transform_velocity(
 153                 player->rigid_bodies,
 154                 player->alive_body_id,
 155                 make_mat3x3(0.0f, 0.0f, 0.0f,
 156                             0.0f, 0.0f, 0.0f,
 157                             0.0f, 0.0f, 1.0f));
 158             rigid_bodies_teleport_to(
 159                 player->rigid_bodies,
 160                 player->alive_body_id,
 161                 player->checkpoint);
 162             player->state = PLAYER_STATE_ALIVE;
 163         }
 164     } break;
 165
 166     default: {}
 167     }
 168 }
 169
 170 void player_move_left(Player *player)
 171 {
 172     trace_assert(player);
 173     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(-PLAYER_SPEED, 0.0f));
 174 }
 175
 176 void player_move_right(Player *player)
 177 {
 178     trace_assert(player);
 179
 180     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(PLAYER_SPEED, 0.0f));
 181 }
 182
 183 void player_stop(Player *player)
 184 {
 185     trace_assert(player);
 186
 187     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(0.0f, 0.0f));
 188 }
 189
 190 void player_jump(Player *player)
 191 {
 192     trace_assert(player);
 193
 194     if (rigid_bodies_touches_ground(player->rigid_bodies, player->alive_body_id)) {
 195         player->jump_threshold = 0;
 196     }
 197
 198     if (player->jump_threshold < PLAYER_MAX_JUMP_THRESHOLD) {
 199         rigid_bodies_transform_velocity(
 200             player->rigid_bodies,
 201             player->alive_body_id,
 202             make_mat3x3(1.0f, 0.0f, 0.0f,
 203                         0.0f, 0.0f, 0.0f,
 204                         0.0f, 0.0f, 1.0f));
 205         rigid_bodies_apply_force(
 206             player->rigid_bodies,
 207             player->alive_body_id,
 208             vec(0.0f, -PLAYER_JUMP));
 209         player->jump_threshold++;
 210     }
 211 }
 212
 213 void player_die(Player *player)
 214 {
 215     trace_assert(player);
 216
 217     if (player->state == PLAYER_STATE_ALIVE) {
 218         const Rect hitbox =
 219             rigid_bodies_hitbox(
 220                 player->rigid_bodies,
 221                 player->alive_body_id);
 222
 223         player->play_die_cue = 1;
 224         player->jump_threshold = 0;
 225         explosion_start(player->dying_body, vec(hitbox.x, hitbox.y));
 226         player->state = PLAYER_STATE_DYING;
 227         rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, true);
 228     }
 229 }
 230
 231 void player_focus_camera(Player *player,
 232                          Camera *camera)
 233 {
 234     trace_assert(player);
 235     trace_assert(camera);
 236
 237     const Rect player_hitbox = rigid_bodies_hitbox(
 238         player->rigid_bodies,
 239         player->alive_body_id);
 240
 241     camera_center_at(
 242         camera,
 243         vec_sum(
 244             vec(player_hitbox.x, player_hitbox.y),
 245             vec(0.0f, -player_hitbox.h * 0.5f)));
 246 }
 247
 248 void player_die_from_lava(Player *player,
 249                           const Lava *lava)
 250 {
 251     if (lava_overlaps_rect(
 252             lava,
 253             rigid_bodies_hitbox(
 254                 player->rigid_bodies,
 255                 player->alive_body_id))) {
 256         player_die(player);
 257     }
 258 }
 259
 260 void player_checkpoint(Player *player, Vec2f checkpoint)
 261 {
 262     player->checkpoint = checkpoint;
 263 }
 264
 265 int player_sound(Player *player,
 266                  Sound_samples *sound_samples)
 267 {
 268     if (player->play_die_cue) {
 269         player->play_die_cue = 0;
 270
 271         if (sound_samples_play_sound(sound_samples, 0) < 0) {
 272             return -1;
 273         }
 274     }
 275
 276     return 0;
 277 }
 278
 279 bool player_overlaps_rect(const Player *player,
 280                           Rect rect)
 281 {
 282     trace_assert(player);
 283
 284     return player->state == PLAYER_STATE_ALIVE
 285         && rects_overlap(
 286             rect, rigid_bodies_hitbox(
 287                 player->rigid_bodies,
 288                 player->alive_body_id));
 289 }
 290
 291 Rect player_hitbox(const Player *player)
 292 {
 293     return rigid_bodies_hitbox(
 294         player->rigid_bodies,
 295         player->alive_body_id);
 296 }