com.mob.client.artemis.systems.render.GridRenderingSystem.java Source code

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Here is the source code for com.mob.client.artemis.systems.render.GridRenderingSystem.java

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/*******************************************************************************
 * Copyright (C) 2014  Rodrigo Troncoso
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 *     You should have received a copy of the GNU Affero General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package com.mob.client.artemis.systems.render;

import com.artemis.Aspect;
import com.artemis.ComponentMapper;
import com.artemis.Entity;
import com.artemis.annotations.Wire;
import com.artemis.systems.EntityProcessingSystem;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.mob.client.artemis.components.graphics.Line;
import com.mob.client.artemis.systems.camera.CameraSystem;

/**
 * GridRenderingSystem Class
 * @author rt
 * @package com.mob.client.api.systems.render
 */
@Wire
public class GridRenderingSystem extends EntityProcessingSystem {

    private ComponentMapper<Line> lm;
    private CameraSystem mCameraSystem;
    private ShapeRenderer mShapeRenderer = new ShapeRenderer();

    @SuppressWarnings("unchecked")
    public GridRenderingSystem() {
        super(Aspect.all(Line.class));

        // Necesario para el ShapeRenderer
        this.mShapeRenderer.setAutoShapeType(true);
    }

    @Override
    protected void begin() {
        super.begin();

        // Inicializamos el batch y lo necesario para renderizar
        Gdx.gl.glEnable(GL20.GL_BLEND);
        Gdx.gl.glBlendFunc(GL20.GL_SRC_ALPHA, GL20.GL_ONE_MINUS_SRC_ALPHA);
        this.mCameraSystem.camera.update();
        this.mShapeRenderer.setProjectionMatrix(this.mCameraSystem.camera.combined);
        this.mShapeRenderer.begin();

    }

    /**
     * Este metodo se encarga de renderizar las
     * lneas de merca de nuestro GridSystem
     *
     * @author rt
     * @param entity
     */
    @Override
    protected void process(Entity entity) {
        // Obtenemos el component de cada lnea
        Line line = this.lm.get(entity);

        // Dibujamos la linea actual
        this.mShapeRenderer.setColor(new Color(0, 255, 0, 0.5f));
        this.mShapeRenderer.line(line.start.x, line.start.y, line.end.x, line.end.y);
    }

    @Override
    protected void end() {
        super.end();

        // Finalizamos el ShapeRenderer y limpiamos
        this.mShapeRenderer.end();
        Gdx.gl.glDisable(GL20.GL_BLEND);
    }

}