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"
#include "animation.h"
#include "artifact.h"
#include "trap.h"
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;
skill->levelcap = 1;
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;
player_turn(data->player, &data->direction);
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if (!position_in_roommatrix(&targetPos)) {
return false;
}
animation_run(data->player->swordAnimation);
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);
}
data->player->stat_data.hits += hitCount;
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} 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);
skill->levelcap = 2;
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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 };
p->sprite->flip = SDL_FLIP_VERTICAL;
}
else if (vector2d_equals(VECTOR2D_DOWN, data->direction)) {
p->velocity = (Vector2d) { 0, DAGGER_VELOCITY };
p->sprite->flip = SDL_FLIP_HORIZONTAL;
}
else if (vector2d_equals(VECTOR2D_RIGHT, data->direction)) {
p->velocity = (Vector2d) { DAGGER_VELOCITY, 0 };
p->sprite->flip = SDL_FLIP_HORIZONTAL;
}
else {
p->velocity = (Vector2d) { -DAGGER_VELOCITY, 0 };
p->sprite->angle = -270;
}
player_turn(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->levelcap = 1;
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_bash(Skill *skill, SkillData *data)
{
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;
player_turn(data->player, &data->direction);
if (!position_in_roommatrix(&targetPos)) {
return false;
}
animation_run(data->player->swordAnimation);
Monster *monster = data->matrix->spaces[targetPos.x][targetPos.y].monster;
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mixer_play_effect(SWING0);
if (monster) {
gui_log("You bash %s with your shield", monster->lclabel);
unsigned int dmg = stats_fight(&data->player->stats, &monster->stats);
if (dmg > 0) {
gui_log("You hit for %u damage", dmg);
if (monster->stats.hp > 0) {
gui_log("%s seems dazed and confused", monster->label);
monster_set_state(monster, STUNNED,
(Uint8) (3 + player_has_artifact(data->player, INCREASED_STUN)));
}
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mixer_play_effect(SLAM);
data->player->stat_data.hits += 1;
} else {
gui_log("You missed %s", monster->lclabel);
}
monster_hit(monster, dmg);
} else {
gui_log("You bash your shield at nothing");
}
player_monster_kill_check(data->player, monster);
return true;
}
static Skill *
create_bash(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(96, 0);
s->fixed = true;
Skill *skill = create_default("Bash", s);
skill->levelcap = 3;
skill->instantUse = false;
skill->resetTime = 2;
skill->available = NULL;
skill->use = skill_bash;
skill->actionRequired = true;
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->levelcap = 1;
skill->instantUse = true;
skill->available = skill_sip_health_available;
skill->use = skill_sip_health;
skill->resetTime = 0;
return skill;
}
static void
skill_charge_check_path(SkillData *data,
Position origin,
Position dest)
{
RoomMatrix *matrix = data->matrix;
Player *player = data->player;
Position itPos = origin;
Position lastPos = dest;
lastPos.x += (int) data->direction.x * 2;
lastPos.y += (int) data->direction.y * 2;
Uint8 steps = 1;
while (position_in_roommatrix(&itPos) && !position_equals(&itPos, &lastPos)) {
RoomSpace *space = &matrix->spaces[itPos.x][itPos.y];
if (space->monster) {
Monster *monster = matrix->spaces[itPos.x][itPos.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);
data->player->stat_data.hits += 1;
}
monster_hit(monster, dmg);
player_monster_kill_check(data->player, monster);
}
// Pick up items in the path
LinkedList *items = space->items;
while (items != NULL) {
Item *item = items->data;
items = items->next;
item_collected(item, player);
}
LinkedList *artifacts = space->artifacts;
while (artifacts != NULL) {
Artifact *artifact = artifacts->data;
artifacts = artifacts->next;
player_add_artifact(player, artifact);
}
if (space->trap)
space->trap->sprite->animate = true;
itPos.x += (int) data->direction.x;
itPos.y += (int) data->direction.y;
steps++;
}
}
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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 playerStartPos = position_to_matrix_coords(&player->sprite->pos);
Position destination = playerStartPos;
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// 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];
Uint32 passThroughCount = 0;
Uint32 chargeThroughLvl = player_has_artifact(data->player, CHARGE_THROUGH);
Position lastAvailableDest = playerStartPos;
while (position_in_roommatrix(&destination))
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{
if (space->occupied) {
if (!space->monster || passThroughCount >= chargeThroughLvl)
break;
else
passThroughCount++;
} else {
lastAvailableDest = destination;
}
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destination.x += (int) data->direction.x;
destination.y += (int) data->direction.y;
space = &matrix->spaces[destination.x][destination.y];
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}
destination = lastAvailableDest;
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// Move player
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Position playerOriginPos = player->sprite->pos;
Sint32 xdiff = destination.x - playerStartPos.x;
Sint32 ydiff = destination.y - playerStartPos.y;
player->sprite->pos.x += xdiff * TILE_DIMENSION;
player->sprite->pos.y += ydiff * TILE_DIMENSION;
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Position playerDestinationPos = player->sprite->pos;
player_turn(data->player, &data->direction);
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// Add motion particles
bool horizontal = data->direction.x != 0;
Dimension particleArea;
if (horizontal)
particleArea = (Dimension) { abs(xdiff) * TILE_DIMENSION, TILE_DIMENSION };
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else
particleArea = (Dimension) { TILE_DIMENSION, abs(ydiff) * TILE_DIMENSION };
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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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skill_charge_check_path(data, playerStartPos, destination);
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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->levelcap = 4;
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skill->use = skill_charge;
return skill;
}
Skill*
skill_create(enum SkillType t)
{
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Skill *skill;
switch (t) {
case FLURRY:
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skill = create_flurry();
break;
case SIP_HEALTH:
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skill = create_sip_health();
break;
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case CHARGE:
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skill = create_charge();
break;
case DAGGER_THROW:
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skill = create_throw_dagger();
break;
case BASH:
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skill = create_bash();
break;
default:
fatal("Unknown SkillType %u", (unsigned int) t);
return NULL;
}
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#ifdef DEBUG
skill->levelcap = 1;
#endif
return skill;
}
void
skill_destroy(Skill *skill)
{
sprite_destroy(skill->icon);
free(skill);
}