/*******************************************************************************
* Copyright 2014 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.ashley.tests.systems;
import com.badlogic.ashley.core.ComponentMapper;
import com.badlogic.ashley.core.Engine;
import com.badlogic.ashley.core.Entity;
import com.badlogic.ashley.core.EntitySystem;
import com.badlogic.ashley.core.Family;
import com.badlogic.ashley.tests.components.PositionComponent;
import com.badlogic.ashley.tests.components.VisualComponent;
import com.badlogic.ashley.utils.ImmutableArray;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
public class RenderSystem extends EntitySystem {
private ImmutableArray<Entity> entities;
private SpriteBatch batch;
private OrthographicCamera camera;
private ComponentMapper<PositionComponent> pm = ComponentMapper.getFor(PositionComponent.class);
private ComponentMapper<VisualComponent> vm = ComponentMapper.getFor(VisualComponent.class);
public RenderSystem(OrthographicCamera camera){
batch = new SpriteBatch();
this.camera = camera;
}
@Override
public void addedToEngine(Engine engine) {
entities = engine.getEntitiesFor(Family.getFor(PositionComponent.class, VisualComponent.class));
}
@Override
public void removedFromEngine(Engine engine) {
}
@Override
public void update(float deltaTime) {
PositionComponent position;
VisualComponent visual;
camera.update();
batch.begin();
batch.setProjectionMatrix(camera.combined);
for (int i = 0; i < entities.size(); ++i) {
Entity e = entities.get(i);
position = pm.get(e);
visual = vm.get(e);
batch.draw(visual.region, position.x, position.y);
}
batch.end();
}
}