breakhack/src/skill.c

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/*
* BreakHack - A dungeone crawler RPG
* Copyright (C) 2018 Linus Probert <linus.probert@gmail.com>
*
* 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 <http://www.gnu.org/licenses/>.
*/
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#include <stdlib.h>
#include <string.h>
#include "texturecache.h"
#include "skill.h"
#include "util.h"
#include "player.h"
#include "roommatrix.h"
#include "stats.h"
#include "monster.h"
#include "mixer.h"
#include "gui.h"
#include "random.h"
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#include "particle_engine.h"
#include "projectile.h"
#include "linkedlist.h"
#include "item.h"
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static void
set_player_clip_for_direction(Player *player, Vector2d *direction)
{
if (direction->y > 0) // Down
player->sprite->clip.y = 0;
else if (direction->y < 0) // Up
player->sprite->clip.y = 48;
else if (direction->x < 0) // Left
player->sprite->clip.y = 16;
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else if (direction->x > 0) // Right
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player->sprite->clip.y = 32;
}
static Skill *
create_default(const char *s_label, Sprite *s)
{
Skill *skill = ec_malloc(sizeof(Skill));
m_strcpy(skill->label, 20, s_label);
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skill->resetTime = 5;
skill->resetCountdown = 0;
skill->icon = s;
skill->actionRequired = true;
skill->instantUse = false;
skill->active = false;
skill->available = NULL;
skill->use = NULL;
return skill;
}
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static bool
skill_use_flurry(Skill *skill, SkillData *data)
{
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UNUSED (skill);
Position playerPos = position_to_matrix_coords(&data->player->sprite->pos);
Position targetPos = playerPos;
targetPos.x += (int) data->direction.x;
targetPos.y += (int) data->direction.y;
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set_player_clip_for_direction(data->player, &data->direction);
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if (!position_in_roommatrix(&targetPos)) {
return false;
}
Monster *monster = data->matrix->spaces[targetPos.x][targetPos.y].monster;
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mixer_play_effect(TRIPPLE_SWING);
if (monster) {
gui_log("You attack %s with a flurry of strikes", monster->lclabel);
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unsigned int hitCount = 0;
for (size_t i = 0; i < 3; ++i) {
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unsigned int originalHp = monster->stats.hp;
unsigned int dmg = stats_fight(&data->player->stats, &monster->stats);
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if (dmg > 0 && originalHp > 0) {
gui_log("You hit for %u damage", dmg);
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hitCount++;
}
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monster_hit(monster, dmg);
}
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if (hitCount == 1) {
mixer_play_effect(SWORD_HIT);
} else if (hitCount == 2) {
mixer_play_effect(DOUBLE_SWORD_HIT);
} else if (hitCount == 3) {
mixer_play_effect(TRIPPLE_SWORD_HIT);
}
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data->player->hits += hitCount;
} else {
gui_log("You swing at thin air with a flurry of strikes");
}
player_monster_kill_check(data->player, monster);
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return true;
}
static Skill *
create_flurry(void)
{
Texture *t = texturecache_add("Extras/Skills.png");
Sprite *s = sprite_create();
sprite_set_texture(s, t, 0);
s->dim = GAME_DIMENSION;
s->clip = CLIP32(0, 0);
s->fixed = true;
Skill *skill = create_default("Flurry", s);
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skill->use = skill_use_flurry;
return skill;
}
static bool
skill_throw_dagger_available(Player *player)
{
return player->daggers > 0;
}
static bool
skill_throw_dagger(Skill *skill, SkillData *data)
{
UNUSED(skill);
if (data->player->daggers == 0)
return false;
data->player->daggers--;
Projectile *p = projectile_dagger_create();
if (vector2d_equals(VECTOR2D_UP, data->direction))
p->velocity = (Vector2d) { 0, -DAGGER_VELOCITY };
else if (vector2d_equals(VECTOR2D_DOWN, data->direction))
p->velocity = (Vector2d) { 0, DAGGER_VELOCITY };
else if (vector2d_equals(VECTOR2D_RIGHT, data->direction))
p->velocity = (Vector2d) { DAGGER_VELOCITY, 0 };
else
p->velocity = (Vector2d) { -DAGGER_VELOCITY, 0 };
set_player_clip_for_direction(data->player, &data->direction);
mixer_play_effect(SWOOSH);
p->sprite->pos = data->player->sprite->pos;
linkedlist_append(&data->player->projectiles, p);
return true;
}
static Skill *
create_throw_dagger(void)
{
Texture *t = texturecache_add("Extras/Skills.png");
Sprite *s = sprite_create();
sprite_set_texture(s, t, 0);
s->dim = GAME_DIMENSION;
s->clip = CLIP32(64, 0);
s->fixed = true;
Skill *skill = create_default("Throw dagger", s);
skill->instantUse = false;
skill->resetTime = 1;
skill->available = skill_throw_dagger_available;
skill->use = skill_throw_dagger;
skill->actionRequired = false;
return skill;
}
static bool
skill_sip_health_available(Player *player)
{
return player->potion_sips > 0 && player->stats.hp != player->stats.maxhp;
}
static bool
skill_sip_health(Skill *skill, SkillData *data)
{
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UNUSED (skill);
player_sip_health(data->player);
return true;
}
static Skill *
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create_sip_health(void)
{
Texture *t = texturecache_add("Items/Potion.png");
Sprite *s = sprite_create();
sprite_set_texture(s, t, 0);
s->dim = DEFAULT_DIMENSION;
s->clip = CLIP16(0, 0);
s->fixed = true;
Skill *skill = create_default("Sip health", s);
skill->instantUse = true;
skill->available = skill_sip_health_available;
skill->use = skill_sip_health;
skill->resetTime = 0;
return skill;
}
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static bool
skill_charge(Skill *skill, SkillData *data)
{
UNUSED(skill);
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Player *player = data->player;
RoomMatrix *matrix = data->matrix;
Position playerPos = position_to_matrix_coords(&player->sprite->pos);
Position destination = playerPos;
unsigned int steps = 0;
// Find collider
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destination.x += (int) data->direction.x;
destination.y += (int) data->direction.y;
RoomSpace *space = &matrix->spaces[destination.x][destination.y];
while (position_in_roommatrix(&destination) && !space->occupied)
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{
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destination.x += (int) data->direction.x;
destination.y += (int) data->direction.y;
if (space->items != NULL) {
LinkedList *items = space->items;
while (items != NULL) {
Item *item = items->data;
items = items->next;
item_collected(item, player);
}
}
space = &matrix->spaces[destination.x][destination.y];
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steps++;
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}
if (!position_in_roommatrix(&destination)) {
destination.x -= (int) data->direction.x;
destination.y -= (int) data->direction.y;
}
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// Move player
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Position playerOriginPos = player->sprite->pos;
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player->sprite->pos.x += (steps * TILE_DIMENSION) * (int) data->direction.x;
player->sprite->pos.y += (steps * TILE_DIMENSION) * (int) data->direction.y;
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Position playerDestinationPos = player->sprite->pos;
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set_player_clip_for_direction(data->player, &data->direction);
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// Add motion particles
bool horizontal = data->direction.x != 0;
Dimension particleArea;
if (horizontal)
particleArea = (Dimension) { steps * TILE_DIMENSION, TILE_DIMENSION };
else
particleArea = (Dimension) { TILE_DIMENSION, steps * TILE_DIMENSION };
Position speedLinePos;
if (playerOriginPos.x < playerDestinationPos.x || playerOriginPos.y < playerDestinationPos.y)
speedLinePos = playerOriginPos;
else
speedLinePos = playerDestinationPos;
particle_engine_speed_lines(speedLinePos, particleArea, horizontal);
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mixer_play_effect(SWOOSH);
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if (matrix->spaces[destination.x][destination.y].monster) {
Monster *monster = matrix->spaces[destination.x][destination.y].monster;
Stats tmpStats = player->stats;
tmpStats.dmg *= steps > 0 ? steps : 1;
mixer_play_effect(SWING0 + get_random(3) - 1);
unsigned int dmg = stats_fight(&tmpStats, &monster->stats);
if (dmg > 0) {
gui_log("You charged %s for %u damage", monster->lclabel, dmg);
mixer_play_effect(SWORD_HIT);
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data->player->hits += 1;
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}
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monster_hit(monster, dmg);
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}
return true;
}
static Skill *
create_charge(void)
{
Texture *t = texturecache_add("Extras/Skills.png");
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Sprite *s = sprite_create();
sprite_set_texture(s, t, 0);
s->dim = GAME_DIMENSION;
s->clip = CLIP32(32, 0);
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s->fixed = true;
Skill *skill = create_default("Charge", s);
skill->use = skill_charge;
return skill;
}
Skill*
skill_create(enum SkillType t)
{
switch (t) {
case FLURRY:
return create_flurry();
case SIP_HEALTH:
return create_sip_health();
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case CHARGE:
return create_charge();
case DAGGER_THROW:
return create_throw_dagger();
default:
fatal("Unknown SkillType %u", (unsigned int) t);
return NULL;
}
}
void
skill_destroy(Skill *skill)
{
sprite_destroy(skill->icon);
free(skill);
}