painfull-success-cg/include/player.h

/* SPDX-License-Identifier: MIT
 * Copyright (c) 2021 KikooDX
 * This file is part of
 * [Painfull Success CG](https://git.sr.ht/~kikoodx/painfull-success-cg),
 * which is MIT licensed. The MIT license requires this copyright notice to be
 * included in all copies and substantial portions of the software. */
#pragma once
#include "input.h"
#include "lazyint.h"
#include "vec2.h"
#include <stdbool.h>

#define PLAYER_WIDTH         12
#define PLAYER_HEIGHT        12
#define GRAVITY              0.2
#define JUMP_SPD             -5.8
#define JUMP_BUFFER          6
#define COYOT                6
#define FALL_RESISTANCE      0.04
#define FASTFALL_RESISTANCE  0.01
#define MAX_HORIZONTAL_SPEED 2.0
#define GROUND_ACCELERATION  0.4
#define AIR_ACCELERATION     1.0
#define GROUND_FRICTION      (GROUND_ACCELERATION / MAX_HORIZONTAL_SPEED)
#define AIR_FRICTION         (AIR_ACCELERATION / MAX_HORIZONTAL_SPEED)
#define KNOCKBACK_Y          (-(JUMP_SPD) + 2.0)
#define KNOCKBACK_X          MAX_HORIZONTAL_SPEED

typedef struct Player {
	Vec2 pos;
	f32 spd_x;
	f32 spd_y;
	i8 facing;
	bool stun;
	bool knocked;
	u8 keys_left;
	u8 jump_buffer;
	u8 coyot;
} Player;

#include "level.h"

void player_init(Player *player);
void player_update(Player *player, Level *level, Input input, u8 *level_id);
void player_draw(Player player, i16 y_offset);
/* Helper functions. */
bool player_collide(Level level, Vec2 pos, tile_t tile, u8 margin);
bool player_move(Player *player, Level level, i8 spd_x, i8 spd_y);
u8 player_collide_key(Level *level, vec2_int_t x, vec2_int_t y);
void player_collide_keys(Player *player, Level *level);

i8 sign(i8 value);
f32 signf(f32 value);
i8 round(f32 value);