1 files changed, 326 insertions, 0 deletions
diff --git a/player.c b/player.c
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index 0000000..9a05971
--- /dev/null
+++ b/player.c
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+/*
+ * player.c -- Implementa el personaje controlado por el jugador.
+ * Copyright (C) 2018 Juan Marín Noguera
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <malloc.h>
+#include "collision_type.h"
+#include "block.h"
+#include "error.h"
+#include "player.h"
+#include "screen.h"
+
+#define PLAYER_GRAVITY 0.15
+#define PLAYER_ACCEL 0.2
+#define PLAYER_ACCEL_FLYING 0.02
+#define PLAYER_VELOCITY_JUMP 4.5
+#define PLAYER_MAX_VELOCITY 1.8
+#define PLAYER_ANIM_TICKS 5
+#define PLAYER_ANIM_NO 3
+#define PLAYER_PICT_FILE "50365.bmp"
+#define PLAYER_SMALL_Y 34
+#define PLAYER_SMALL_H 16
+#define PLAYER_BIG_Y 1
+#define PLAYER_BIG_H 32
+#define PLAYER_FLOWER_Y 129
+#define PLAYER_SHIFT_X 17
+#define PLAYER_DEAD_X 182
+#define PLAYER_LOOK_X 80
+#define PLAYER_JUMP_X 165
+#define PLAYER_GROUND_X 182
+#define PLAYER_WALK_X 97
+#define PLAYER_VULNERABLE_TICKS 60
+
+struct Player {
+	double x;
+	double y;
+	double vx;
+	double vy;
+	PlayerState state;
+	PlayerPos pos;
+	int left;
+	int counter;
+	int coins;
+	int lives;
+	int vuln;
+};
+
+Picture player_pict = NULL;
+
+Player player_create(int x, int y, int lives)
+{
+	Player p = malloc(sizeof(struct Player));
+	if (p == NULL)
+		error_libc_exit();
+
+	p->x = x;
+	p->y = y;
+	p->vx = 0;
+	p->vy = 0;
+	p->state = PLAYER_ST_SMALL;
+	p->pos = PLAYER_POS_UPRIGHT;
+	p->counter = 0;
+	p->left = 0;
+	p->coins = 0;
+	p->lives = lives;
+	p->vuln = PLAYER_VULNERABLE_TICKS;
+
+	return p;
+}
+
+void player_free(Player p)
+{
+	if(p == NULL)
+		error_exit(ERR_NULL_PARAM);
+	free(p);
+}
+
+void player_end()
+{
+	if (player_pict != NULL) {
+		screen_free_picture(player_pict);
+		player_pict = NULL;
+	}
+}
+
+double player_x(Player p)
+{
+	return p->x;
+}
+
+void player_set_x(Player p, double x)
+{
+	p->x = x;
+}
+
+double player_y(Player p)
+{
+	return p->y;
+}
+
+void player_set_y(Player p, double y)
+{
+	p->y = y;
+}
+
+double player_vx(Player p)
+{
+	return p->vx;
+}
+
+double player_vy(Player p)
+{
+	return p->vy;
+}
+
+PlayerState player_state(Player p)
+{
+	return p->state;
+}
+
+PlayerPos player_pos(Player p)
+{
+	return p->pos;
+}
+
+void player_set_pos(Player p, PlayerPos pos)
+{
+	if (pos == PLAYER_POS_JUMP && p->pos != PLAYER_POS_JUMP)
+		p->vy = PLAYER_VELOCITY_JUMP;
+	p->pos = pos;
+}
+
+int player_coins(Player p)
+{
+	return p->coins;
+}
+
+int player_lives(Player p)
+{
+	return p->lives;
+}
+
+void player_update(Player p)
+{
+	p->counter++;
+	p->vuln++;
+	p->vy -= PLAYER_GRAVITY;
+	p->x += p->vx;
+	p->y += p->vy;
+}
+
+int player_vulnerable(Player p)
+{
+	return p->vuln >= PLAYER_VULNERABLE_TICKS;
+}
+
+void player_correct_on_collision(Player p, int dir)
+{
+	if (dir & COLLISION_BOTTOM) {
+		p->vy = 0;
+		p->y = ((int)(p->y + BLOCK_SIZE) / BLOCK_SIZE) * BLOCK_SIZE;
+		if (dir & COLLISION_TOP)
+			p->pos = PLAYER_POS_GROUND;
+		else
+			p->pos = PLAYER_POS_UPRIGHT;
+	} else if (dir & COLLISION_TOP) {
+		p->vy = 0;
+		p->y = p->y - 2 * (((int)p->y) % BLOCK_SIZE);
+	}
+	if (dir & COLLISION_LEFT) {
+		p->vx = 0;
+		p->x = (((int)(p->x + BLOCK_SIZE)) / BLOCK_SIZE) * BLOCK_SIZE;
+	}
+	if (dir & COLLISION_RIGHT) {
+		p->vx = 0;
+		p->x = (((int)(p->x)) / BLOCK_SIZE) * BLOCK_SIZE;
+	}
+}
+
+void player_accel(Player p, int left)
+{
+	double amount = p->pos == PLAYER_POS_JUMP && p->vy < 0 ?
+				PLAYER_ACCEL_FLYING : PLAYER_ACCEL;
+	if (left)
+		p->vx = (p->vx > 0 ? -amount : p->vx - amount);
+	else
+		p->vx = (p->vx < 0 ? amount : p->vx + amount);
+
+	if (p->vx > PLAYER_MAX_VELOCITY)
+		p->vx = PLAYER_MAX_VELOCITY;
+	else if (p->vx < -PLAYER_MAX_VELOCITY)
+		p->vx = -PLAYER_MAX_VELOCITY;
+}
+
+void player_jump(Player p)
+{
+	if (p->pos != PLAYER_POS_JUMP) {
+		p->vy = PLAYER_VELOCITY_JUMP;
+		p->pos = PLAYER_POS_JUMP;
+	}
+}
+
+
+void player_stop(Player p)
+{
+	if (p->pos != PLAYER_POS_JUMP)
+		p->vx = 0;
+}
+
+int player_pict_y(Player p)
+{
+	switch (p->state) {
+	case PLAYER_ST_SMALL:
+	case PLAYER_ST_DEAD:
+		return PLAYER_SMALL_Y;
+	case PLAYER_ST_BIG:
+		return PLAYER_BIG_Y;
+	case PLAYER_ST_FLOWER:
+		return PLAYER_FLOWER_Y;
+	default:
+		error_exit(ERR_OUT_OF_RANGE);
+		return 0; // Execution will never reach this point.
+	}
+}
+
+int player_height(Player p) {
+	return p->state == PLAYER_ST_SMALL || p->state == PLAYER_ST_DEAD ?
+		PLAYER_SMALL_H : PLAYER_BIG_H;
+}
+
+int player_pict_x(Player p)
+{
+	if (p->state == PLAYER_ST_DEAD)
+		return PLAYER_DEAD_X;
+	else if (p->pos == PLAYER_POS_JUMP)
+		return PLAYER_JUMP_X;
+	else if (p->pos == PLAYER_POS_GROUND &&
+			p->state != PLAYER_ST_SMALL)
+		return PLAYER_GROUND_X;
+	else if (p->vx == 0)
+		return PLAYER_LOOK_X;
+	else // Walking
+		return PLAYER_WALK_X +
+			((p->counter / PLAYER_ANIM_TICKS) % PLAYER_ANIM_NO)
+			* PLAYER_SHIFT_X;
+}
+
+void player_render(Screen scr, Player p, int scroll)
+{
+	int h = player_height(p);
+
+	if (p->vx < 0)
+		p->left = 1;
+	else if (p->vx > 0)
+		p->left = 0;
+
+	if (player_pict == NULL)
+		player_pict = screen_get_picture(PLAYER_PICT_FILE);
+
+	screen_place(
+		scr,
+		player_pict,
+		p->x - scroll,
+		screen_height(scr) - p->y - h,
+		player_pict_x(p),
+		player_pict_y(p),
+		PLAYER_WIDTH,
+		h,
+		p->left);
+}
+
+void player_downgrade(Player p)
+{
+	if (p->state != PLAYER_ST_DEAD)
+		p->state--;
+	p->vuln = 0;
+}
+
+void player_upgrade_to(Player p, int state)
+{
+	if (p->state > PLAYER_ST_FLOWER)
+		error_exit(ERR_OUT_OF_RANGE);
+	if (p->state < state)
+		p->state = state;
+}
+
+void player_die(Player p)
+{
+	p->state = PLAYER_ST_DEAD;
+}
+
+void player_add_coin(Player p)
+{
+	if (++p->coins % 100 == 0)
+		++p->lives;
+}
+
+
+int player_restart(Player p)
+{
+	p->vx = 0;
+	p->vy = 0;
+	p->pos = PLAYER_POS_UPRIGHT;
+	p->left = 0;
+	p->counter = 0;
+	p->vuln = PLAYER_VULNERABLE_TICKS;
+
+	if (p->state == PLAYER_ST_DEAD) {
+		player_upgrade_to(p, PLAYER_ST_SMALL);
+		p->coins = 0;
+	}
+
+	return --p->lives > 0;
+}