org.saltosion.pixelprophecy.systems.RenderingSystem.java Source code

Introduction

Here is the source code for org.saltosion.pixelprophecy.systems.RenderingSystem.java

Source

/*
 * Copyright (C) 2016 Saltosion
 *
 * 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
 * GNUss 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/>.
 */
package org.saltosion.pixelprophecy.systems;

import box2dLight.RayHandler;
import com.badlogic.ashley.core.ComponentMapper;
import com.badlogic.ashley.core.Entity;
import com.badlogic.ashley.core.Family;
import com.badlogic.ashley.systems.IteratingSystem;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.Sprite;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.maps.MapProperties;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.maps.tiled.renderers.OrthogonalTiledMapRenderer;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Box2DDebugRenderer;
import com.badlogic.gdx.physics.box2d.World;
import org.saltosion.pixelprophecy.Comp;
import org.saltosion.pixelprophecy.util.Globals;
import org.saltosion.pixelprophecy.util.Names;
import org.saltosion.pixelprophecy.util.SpriteChannel;

public class RenderingSystem extends IteratingSystem {

    private final World world;
    private final Box2DDebugRenderer b2dDebugRenderer;
    private final OrthographicCamera camera;
    private final RayHandler rayHandler;
    private final SpriteBatch spriteBatch;

    private Color ambientLight;

    private Entity followedEntity;

    private final ComponentMapper<Comp.RenderedObject> rom = ComponentMapper.getFor(Comp.RenderedObject.class);
    private final ComponentMapper<Comp.Physics> pm = ComponentMapper.getFor(Comp.Physics.class);

    private OrthogonalTiledMapRenderer mapRenderer;
    private TiledMap mapToRender;

    public RenderingSystem(World world) {
        super(Family.all(Comp.RenderedObject.class, Comp.Physics.class).get());
        this.world = world;

        camera = new OrthographicCamera();
        b2dDebugRenderer = new Box2DDebugRenderer(true, true, true, true, true, true);

        rayHandler = new RayHandler(world);
        rayHandler.setBlurNum(2);

        spriteBatch = new SpriteBatch();
    }

    /**
     * Used to change the map
     * @param map 
     */
    public final void setMap(TiledMap map) {
        mapToRender = map;
        MapProperties properties = map.getProperties();
        mapRenderer = new OrthogonalTiledMapRenderer(mapToRender, Globals.SPRITE_SCALE);
        if (properties.containsKey("ambientlight")) {
            ambientLight = Globals.parseColor(properties.get("ambientlight", String.class));
        } else {
            ambientLight = new Color(0, 0, 0, 1);
        }
        rayHandler.setAmbientLight(ambientLight);
    }

    @Override
    public void update(float deltaTime) {
        Vector2 playerLoc = pm.get(followedEntity).body.getPosition();
        camera.position.set(playerLoc.x, playerLoc.y, 0);
        camera.update();
        rayHandler.setCombinedMatrix(camera.combined);
        spriteBatch.setProjectionMatrix(camera.combined);
        mapRenderer.setView(camera);

        mapRenderer.render(Globals.BACKGROUND);
        spriteBatch.begin();
        super.update(deltaTime);
        spriteBatch.end();
        mapRenderer.render(Globals.FOREGROUND);

        if (Globals.PHYSICS_DEBUG) {
            b2dDebugRenderer.render(world, camera.combined);
        }
        rayHandler.updateAndRender();
    }

    @Override
    protected void processEntity(Entity entity, float deltaTime) {
        Comp.Physics physics = pm.get(entity);
        Comp.RenderedObject ro = rom.get(entity);

        if (physics.destination.x < 0) {
            ro.setLookingLeft(true);
        } else if (physics.destination.x > 0) {
            ro.setLookingLeft(false);
        }

        for (SpriteChannel channel : ro.getChannels()) {
            // If entity is not moving
            if (physics.destination.isZero()) {
                channel.playAnimation(Names.IDLE); // Play idle animation
            } else { // Otherwise
                channel.playAnimation(Names.WALK); // Play walk animation
            }

            Sprite sprite = channel.getCurrentSprite();
            sprite.setFlip(ro.isLookingLeft(), false);

            Vector2 pos;
            // If Physics has body, use it.
            if (physics.body != null) {
                pos = physics.body.getPosition();
            } else { // Otherwise use backup plan
                pos = physics.location;
            }
            pos.x -= sprite.getWidth() / 2;
            pos.y -= sprite.getHeight() / 2;
            sprite.setPosition(pos.x, pos.y);
            sprite.draw(spriteBatch);

            channel.advance(deltaTime);
        }
    }

    public void resize(int width, int height) {
        Globals.ASPECT_RATIO = width * 1f / height;
        camera.setToOrtho(false, Globals.VIEWPORT_HEIGHT * Globals.ASPECT_RATIO, Globals.VIEWPORT_HEIGHT);
    }

    public RayHandler getRayHandler() {
        return rayHandler;
    }

    public void setFollowedEntity(Entity followedEntity) {
        this.followedEntity = followedEntity;
    }

    public Entity getFollowedEntity() {
        return followedEntity;
    }

    public OrthographicCamera getCamera() {
        return camera;
    }

}