src/game/level/player.c

   1 #include <SDL2/SDL.h>
   2 #include "system/stacktrace.h"
   3 #include <stdio.h>
   4 #include <stdlib.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
  18 #define PLAYER_WIDTH 25.0f
  19 #define PLAYER_HEIGHT 25.0f
  20 #define PLAYER_SPEED 500.0f
  21 #define PLAYER_JUMP 32000.0f
  22 #define PLAYER_DEATH_DURATION 0.75f
  23 #define PLAYER_MAX_JUMP_THRESHOLD 2
  24
  25 typedef enum Player_state {
  26     PLAYER_STATE_ALIVE = 0,
  27     PLAYER_STATE_DYING
  28 } Player_state;
  29
  30 struct Player {
  31     Lt *lt;
  32     Player_state state;
  33
  34     RigidBodies *rigid_bodies;
  35
  36     RigidBodyId alive_body_id;
  37     Explosion *dying_body;
  38     Script *script;
  39
  40     int jump_threshold;
  41     Color color;
  42
  43     Vec checkpoint;
  44
  45     int play_die_cue;
  46 };
  47
  48 Player *create_player_from_line_stream(LineStream *line_stream, RigidBodies *rigid_bodies, Broadcast *broadcast)
  49 {
  50     trace_assert(line_stream);
  51
  52     Lt *lt = create_lt();
  53
  54
  55     Player *player = PUSH_LT(lt, nth_calloc(1, sizeof(Player)), free);
  56     if (player == NULL) {
  57         RETURN_LT(lt, NULL);
  58     }
  59     player->lt = lt;
  60
  61     player->rigid_bodies = rigid_bodies;
  62
  63     float x = 0.0f, y = 0.0f;
  64     char colorstr[7];
  65
  66     if (sscanf(
  67             line_stream_next(line_stream),
  68             "%f%f%6s",
  69             &x, &y, colorstr) == EOF) {
  70         log_fail("Could not read player\n");
  71         RETURN_LT(lt, NULL);
  72     }
  73
  74     player->script = PUSH_LT(
  75         lt,
  76         create_script_from_line_stream(line_stream, broadcast),
  77         destroy_script);
  78     if (player->script == NULL) {
  79         RETURN_LT(lt, NULL);
  80     }
  81
  82     const Color color = hexstr(colorstr);
  83
  84     player->alive_body_id = rigid_bodies_add(
  85         rigid_bodies,
  86         rect(x, y, PLAYER_WIDTH, PLAYER_HEIGHT));
  87
  88     player->dying_body = PUSH_LT(
  89         lt,
  90         create_explosion(
  91             color,
  92             PLAYER_DEATH_DURATION),
  93         destroy_explosion);
  94     if (player->dying_body == NULL) {
  95         RETURN_LT(lt, NULL);
  96     }
  97
  98     player->jump_threshold = 0;
  99     player->color = color;
 100     player->checkpoint = vec(x, y);
 101     player->play_die_cue = 0;
 102     player->state = PLAYER_STATE_ALIVE;
 103
 104     return player;
 105 }
 106
 107 void destroy_player(Player * player)
 108 {
 109     RETURN_LT0(player->lt);
 110 }
 111
 112 int player_render(const Player * player,
 113                   Camera *camera)
 114 {
 115     trace_assert(player);
 116     trace_assert(camera);
 117
 118     char debug_text[256];
 119
 120     switch (player->state) {
 121     case PLAYER_STATE_ALIVE: {
 122         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 123         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 124
 125         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 126             return -1;
 127         }
 128
 129         return rigid_bodies_render(
 130             player->rigid_bodies,
 131             player->alive_body_id,
 132             player->color,
 133             camera);
 134     }
 135
 136     case PLAYER_STATE_DYING:
 137         return explosion_render(player->dying_body, camera);
 138
 139     default: {}
 140     }
 141
 142     return 0;
 143 }
 144
 145 void player_update(Player *player,
 146                    float delta_time)
 147 {
 148     trace_assert(player);
 149
 150     switch (player->state) {
 151     case PLAYER_STATE_ALIVE: {
 152         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 153
 154         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 155
 156
 157         if (hitbox.y > 1000.0f) {
 158             player_die(player);
 159         }
 160     } break;
 161
 162     case PLAYER_STATE_DYING: {
 163         explosion_update(player->dying_body, delta_time);
 164
 165         if (explosion_is_done(player->dying_body)) {
 166             rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, false);
 167             rigid_bodies_transform_velocity(
 168                 player->rigid_bodies,
 169                 player->alive_body_id,
 170                 make_mat3x3(0.0f, 0.0f, 0.0f,
 171                             0.0f, 0.0f, 0.0f,
 172                             0.0f, 0.0f, 1.0f));
 173             rigid_bodies_teleport_to(
 174                 player->rigid_bodies,
 175                 player->alive_body_id,
 176                 player->checkpoint);
 177             player->state = PLAYER_STATE_ALIVE;
 178         }
 179     } break;
 180
 181     default: {}
 182     }
 183 }
 184
 185 void player_move_left(Player *player)
 186 {
 187     trace_assert(player);
 188     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(-PLAYER_SPEED, 0.0f));
 189 }
 190
 191 void player_move_right(Player *player)
 192 {
 193     trace_assert(player);
 194
 195     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(PLAYER_SPEED, 0.0f));
 196 }
 197
 198 void player_stop(Player *player)
 199 {
 200     trace_assert(player);
 201
 202     rigid_bodies_move(player->rigid_bodies, player->alive_body_id, vec(0.0f, 0.0f));
 203 }
 204
 205 void player_jump(Player *player)
 206 {
 207     trace_assert(player);
 208
 209     if (rigid_bodies_touches_ground(player->rigid_bodies, player->alive_body_id)) {
 210         player->jump_threshold = 0;
 211     }
 212
 213     if (player->jump_threshold < PLAYER_MAX_JUMP_THRESHOLD) {
 214         rigid_bodies_transform_velocity(
 215             player->rigid_bodies,
 216             player->alive_body_id,
 217             make_mat3x3(1.0f, 0.0f, 0.0f,
 218                         0.0f, 0.0f, 0.0f,
 219                         0.0f, 0.0f, 1.0f));
 220         rigid_bodies_apply_force(
 221             player->rigid_bodies,
 222             player->alive_body_id,
 223             vec(0.0f, -PLAYER_JUMP));
 224         player->jump_threshold++;
 225
 226         if (script_has_scope_value(player->script, "on-jump")) {
 227             script_eval(player->script, "(on-jump)");
 228         }
 229     }
 230 }
 231
 232 void player_die(Player *player)
 233 {
 234     trace_assert(player);
 235
 236     if (player->state == PLAYER_STATE_ALIVE) {
 237         const Rect hitbox =
 238             rigid_bodies_hitbox(
 239                 player->rigid_bodies,
 240                 player->alive_body_id);
 241
 242         player->play_die_cue = 1;
 243         explosion_start(player->dying_body, vec(hitbox.x, hitbox.y));
 244         player->state = PLAYER_STATE_DYING;
 245         rigid_bodies_disable(player->rigid_bodies, player->alive_body_id, true);
 246     }
 247 }
 248
 249 void player_focus_camera(Player *player,
 250                          Camera *camera)
 251 {
 252     trace_assert(player);
 253     trace_assert(camera);
 254
 255     const Rect player_hitbox = rigid_bodies_hitbox(
 256         player->rigid_bodies,
 257         player->alive_body_id);
 258
 259     camera_center_at(
 260         camera,
 261         vec_sum(
 262             vec(player_hitbox.x, player_hitbox.y),
 263             vec(0.0f, -player_hitbox.h * 0.5f)));
 264 }
 265
 266 void player_hide_goals(const Player *player,
 267                        Goals *goals)
 268 {
 269     trace_assert(player);
 270     trace_assert(goals);
 271     goals_hide_from_player(
 272         goals,
 273         rigid_bodies_hitbox(
 274             player->rigid_bodies,
 275             player->alive_body_id));
 276 }
 277
 278 void player_die_from_lava(Player *player,
 279                           const Lava *lava)
 280 {
 281     if (lava_overlaps_rect(
 282             lava,
 283             rigid_bodies_hitbox(
 284                 player->rigid_bodies,
 285                 player->alive_body_id))) {
 286         player_die(player);
 287     }
 288 }
 289
 290 void player_checkpoint(Player *player, Vec checkpoint)
 291 {
 292     player->checkpoint = checkpoint;
 293 }
 294
 295 int player_sound(Player *player,
 296                  Sound_samples *sound_samples)
 297 {
 298     if (player->play_die_cue) {
 299         player->play_die_cue = 0;
 300
 301         if (sound_samples_play_sound(sound_samples, 0) < 0) {
 302             return -1;
 303         }
 304     }
 305
 306     return 0;
 307 }
 308
 309 bool player_overlaps_rect(const Player *player,
 310                           Rect rect)
 311 {
 312     trace_assert(player);
 313
 314     return player->state == PLAYER_STATE_ALIVE
 315         && rects_overlap(
 316             rect, rigid_bodies_hitbox(
 317                 player->rigid_bodies,
 318                 player->alive_body_id));
 319 }
 320
 321 Rect player_hitbox(const Player *player)
 322 {
 323     return rigid_bodies_hitbox(
 324         player->rigid_bodies,
 325         player->alive_body_id);
 326 }