SimpleDecalTest.java example

Explorer
libgdx-master
/*******************************************************************************
 * Copyright 2011 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.gdx.tests;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.FPSLogger;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.TextureRegion;
import com.badlogic.gdx.graphics.g3d.decals.CameraGroupStrategy;
import com.badlogic.gdx.graphics.g3d.decals.Decal;
import com.badlogic.gdx.graphics.g3d.decals.DecalBatch;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.tests.utils.GdxTest;
import com.badlogic.gdx.tests.utils.PerspectiveCamController;
import com.badlogic.gdx.utils.Array;

public class SimpleDecalTest extends GdxTest {
	private static final int NUM_DECALS = 3;
	DecalBatch batch;
	Array<Decal> decals = new Array<Decal>();
	PerspectiveCamera camera;
	PerspectiveCamController controller;
	FPSLogger logger = new FPSLogger();

	public void create () {
		float width = Gdx.graphics.getWidth();
		float height = Gdx.graphics.getHeight();

		camera = new PerspectiveCamera(45, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
		camera.near = 1;
		camera.far = 300;
		camera.position.set(0, 0, 5);
		controller = new PerspectiveCamController(camera);

		Gdx.input.setInputProcessor(controller);
		batch = new DecalBatch(new CameraGroupStrategy(camera));

		TextureRegion[] textures = {new TextureRegion(new Texture(Gdx.files.internal("data/egg.png"))),
			new TextureRegion(new Texture(Gdx.files.internal("data/wheel.png"))),
			new TextureRegion(new Texture(Gdx.files.internal("data/badlogic.jpg")))};

		Decal decal = Decal.newDecal(1, 1, textures[1]);
		decal.setPosition(0, 0, 0);
		decals.add(decal);

		decal = Decal.newDecal(1, 1, textures[0], true);
		decal.setPosition(0.5f, 0.5f, 1);
		decals.add(decal);

		decal = Decal.newDecal(1, 1, textures[0], true);
		decal.setPosition(1, 1, -1);
		decals.add(decal);

		decal = Decal.newDecal(1, 1, textures[2]);
		decal.setPosition(1.5f, 1.5f, -2);
		decals.add(decal);

		decal = Decal.newDecal(1, 1, textures[1]);
		decal.setPosition(2, 2, -1.5f);
		decals.add(decal);
	}

	Vector3 dir = new Vector3();
	private boolean billboard = true;

	public void render () {
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
		Gdx.gl.glEnable(GL20.GL_DEPTH_TEST);

		camera.update();
		for (int i = 0; i < decals.size; i++) {
			Decal decal = decals.get(i);
			if (billboard) {
				// billboarding for ortho cam :)
// dir.set(-camera.direction.x, -camera.direction.y, -camera.direction.z);
// decal.setRotation(dir, Vector3.Y);

				// billboarding for perspective cam
				decal.lookAt(camera.position, camera.up);
			}
			batch.add(decal);
		}
		batch.flush();
		logger.log();
	}

	@Override
	public void dispose () {
		batch.dispose();
	}
}