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/player/dying_rect.h"
   7 #include "game/level/player/rigid_rect.h"
   8 #include "game/level/script.h"
   9 #include "game/level/rigid_bodies.h"
  10 #include "goals.h"
  11 #include "math/point.h"
  12 #include "platforms.h"
  13 #include "player.h"
  14 #include "system/line_stream.h"
  15 #include "system/log.h"
  16 #include "system/lt.h"
  17 #include "system/nth_alloc.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     Dying_rect *dying_body;
  39     Script *script;
  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_line_stream(LineStream *line_stream, RigidBodies *rigid_bodies, Broadcast *broadcast)
  50 {
  51     trace_assert(line_stream);
  52
  53     Lt *lt = create_lt();
  54
  55     if (lt == NULL) {
  56         return NULL;
  57     }
  58
  59     Player *player = PUSH_LT(lt, nth_alloc(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     float x = 0.0f, y = 0.0f;
  68     char colorstr[7];
  69
  70     if (sscanf(
  71             line_stream_next(line_stream),
  72             "%f%f%6s",
  73             &x, &y, colorstr) == EOF) {
  74         log_fail("Could not read player\n");
  75         RETURN_LT(lt, NULL);
  76     }
  77
  78     player->script = PUSH_LT(
  79         lt,
  80         create_script_from_line_stream(line_stream, broadcast),
  81         destroy_script);
  82     if (player->script == NULL) {
  83         RETURN_LT(lt, NULL);
  84     }
  85
  86     const Color color = hexstr(colorstr);
  87
  88     player->alive_body_id = rigid_bodies_add(
  89         rigid_bodies,
  90         rect(x, y, PLAYER_WIDTH, PLAYER_HEIGHT),
  91         color);
  92
  93     player->dying_body = PUSH_LT(
  94         lt,
  95         create_dying_rect(
  96             color,
  97             PLAYER_DEATH_DURATION),
  98         destroy_dying_rect);
  99     if (player->dying_body == NULL) {
 100         RETURN_LT(lt, NULL);
 101     }
 102
 103     player->jump_threshold = 0;
 104     player->color = color;
 105     player->checkpoint = vec(x, y);
 106     player->play_die_cue = 0;
 107     player->state = PLAYER_STATE_ALIVE;
 108
 109     return player;
 110 }
 111
 112 void destroy_player(Player * player)
 113 {
 114     RETURN_LT0(player->lt);
 115 }
 116
 117 int player_render(const Player * player,
 118                   Camera *camera)
 119 {
 120     trace_assert(player);
 121     trace_assert(camera);
 122
 123     char debug_text[256];
 124
 125     switch (player->state) {
 126     case PLAYER_STATE_ALIVE: {
 127         snprintf(debug_text, 256, "Jump: %d", player->jump_threshold);
 128         Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 129
 130         if (camera_render_debug_text(camera, debug_text, vec(hitbox.x, hitbox.y - 20.0f)) < 0) {
 131             return -1;
 132         }
 133
 134         return rigid_bodies_render(player->rigid_bodies, player->alive_body_id, camera);
 135     }
 136
 137     case PLAYER_STATE_DYING:
 138         return dying_rect_render(player->dying_body, camera);
 139
 140     default: {}
 141     }
 142
 143     return 0;
 144 }
 145
 146 void player_update(Player *player,
 147                    float delta_time)
 148 {
 149     trace_assert(player);
 150
 151     switch (player->state) {
 152     case PLAYER_STATE_ALIVE: {
 153         rigid_bodies_update(player->rigid_bodies, player->alive_body_id, delta_time);
 154
 155         const Rect hitbox = rigid_bodies_hitbox(player->rigid_bodies, player->alive_body_id);
 156
 157
 158         if (hitbox.y > 1000.0f) {
 159             player_die(player);
 160         }
 161     } break;
 162
 163     case PLAYER_STATE_DYING: {
 164         dying_rect_update(player->dying_body, delta_time);
 165
 166         if (dying_rect_is_dead(player->dying_body)) {
 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         dying_rect_start_dying(player->dying_body, vec(hitbox.x, hitbox.y));
 244         player->state = PLAYER_STATE_DYING;
 245     }
 246 }
 247
 248 void player_focus_camera(Player *player,
 249                          Camera *camera)
 250 {
 251     trace_assert(player);
 252     trace_assert(camera);
 253
 254     const Rect player_hitbox = rigid_bodies_hitbox(
 255         player->rigid_bodies,
 256         player->alive_body_id);
 257
 258     camera_center_at(
 259         camera,
 260         vec_sum(
 261             vec(player_hitbox.x, player_hitbox.y),
 262             vec(0.0f, -player_hitbox.h * 0.5f)));
 263 }
 264
 265 void player_hide_goals(const Player *player,
 266                        Goals *goals)
 267 {
 268     trace_assert(player);
 269     trace_assert(goals);
 270     goals_hide_from_player(
 271         goals,
 272         rigid_bodies_hitbox(
 273             player->rigid_bodies,
 274             player->alive_body_id));
 275 }
 276
 277 void player_die_from_lava(Player *player,
 278                           const Lava *lava)
 279 {
 280     if (lava_overlaps_rect(
 281             lava,
 282             rigid_bodies_hitbox(
 283                 player->rigid_bodies,
 284                 player->alive_body_id))) {
 285         player_die(player);
 286     }
 287 }
 288
 289 void player_checkpoint(Player *player, Vec checkpoint)
 290 {
 291     player->checkpoint = checkpoint;
 292 }
 293
 294 int player_sound(Player *player,
 295                  Sound_samples *sound_samples)
 296 {
 297     if (player->play_die_cue) {
 298         player->play_die_cue = 0;
 299
 300         if (sound_samples_play_sound(sound_samples, 0, 0) < 0) {
 301             return -1;
 302         }
 303     }
 304
 305     return 0;
 306 }
 307
 308 bool player_overlaps_rect(const Player *player,
 309                           Rect rect)
 310 {
 311     trace_assert(player);
 312
 313     return player->state == PLAYER_STATE_ALIVE
 314         && rects_overlap(
 315             rect, rigid_bodies_hitbox(
 316                 player->rigid_bodies,
 317                 player->alive_body_id));
 318 }