UIRenderSystem.java

package net.mostlyoriginal.ns2d.system.render;

import com.artemis.ComponentMapper;
import com.artemis.Entity;
import com.artemis.annotations.Wire;
import com.artemis.managers.TagManager;
import com.artemis.systems.VoidEntitySystem;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import net.mostlyoriginal.ns2d.component.Health;
import net.mostlyoriginal.ns2d.component.Wallet;
import net.mostlyoriginal.ns2d.system.passive.AssetSystem;
import net.mostlyoriginal.ns2d.system.passive.CameraSystem;

/**
 * @author Daan van Yperen
 */
@Wire
public class UIRenderSystem extends VoidEntitySystem {

    private CameraSystem cameraSystem;
    private AssetSystem assetSystem;
    private SpriteBatch batch = new SpriteBatch();

    private TagManager tagManager;

    private ComponentMapper<Wallet> wm;
    private ComponentMapper<Health> hm;

    @Override
    protected void processSystem() {
        batch.setProjectionMatrix(cameraSystem.guiCamera.combined);
        batch.begin();
        batch.setColor(1f, 1f, 1f, 1f);

        Entity player = tagManager.getEntity("player");
        assetSystem.font.setColor(1f,1f,1f,1f);
        assetSystem.font.draw(batch, "resources: " + wm.get(player).resources + "$", 50, 50);
        if ( hm.has(player))
        {
            Health health = hm.get(player);
            assetSystem.font.draw(batch, "health: " + (health.health - health.damage), 200, 50);
        }

        batch.end();
    }
}