com.dongbat.game.system.localSystem.GridRendererSystem.java Source code

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Here is the source code for com.dongbat.game.system.localSystem.GridRendererSystem.java

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package com.dongbat.game.system.localSystem;

import com.artemis.BaseSystem;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.math.Vector3;
import com.dongbat.game.util.localUtil.PhysicsCameraUtil;

/**
 *
 * @author Admin
 */
public class GridRendererSystem extends BaseSystem {

    ShapeRenderer renderer;

    @Override
    protected void initialize() {
        renderer = new ShapeRenderer();
    }

    @Override
    protected void processSystem() {
        OrthographicCamera camera = PhysicsCameraUtil.getCamera();
        renderer.setProjectionMatrix(camera.combined);
        Vector3 topLeft = camera.unproject(new Vector3(0, 0, 0));
        Vector3 bottomRight = camera.unproject(new Vector3(Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), 0));
        int gridSize = 10;
        float minX = (float) Math.floor(topLeft.x / gridSize) * gridSize;
        float maxX = (float) Math.ceil(bottomRight.x / gridSize) * gridSize;
        float minY = (float) Math.floor(bottomRight.y / gridSize) * gridSize;
        float maxY = (float) Math.ceil(topLeft.y / gridSize) * gridSize;

        renderer.begin(ShapeRenderer.ShapeType.Line);
        renderer.setColor(0.15f, 0.15f, 0.15f, 1);
        for (float i = minX; i < maxX; i += gridSize) {
            renderer.line(i, minY, i, maxY);
        }

        for (float i = minY; i < maxY; i += gridSize) {
            renderer.line(minX, i, maxX, i);
        }

        renderer.end();
    }

}