/*******************************************************************************
 * 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.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.Pixmap.Format;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Bresenham2;
import com.badlogic.gdx.math.GridPoint2;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.tests.utils.GdxTest;

public class Bresenham2Test extends GdxTest {
	SpriteBatch batch;
	Texture result;

	@Override
	public void create () {
		Pixmap pixmap = new Pixmap(512, 512, Format.RGBA8888);
		pixmap.setColor(Color.WHITE);

		Bresenham2 bresenham = new Bresenham2();
		for (GridPoint2 point : bresenham.line(0, 0, 512, 512))
			pixmap.drawPixel(point.x, point.y);
		for (GridPoint2 point : bresenham.line(512, 0, 0, 512))
			pixmap.drawPixel(point.x, point.y);
		for (GridPoint2 point : bresenham.line(0, 0, 512, 256))
			pixmap.drawPixel(point.x, point.y);
		for (GridPoint2 point : bresenham.line(512, 0, 0, 256))
			pixmap.drawPixel(point.x, point.y);

		result = new Texture(pixmap);
		batch = new SpriteBatch();
	}

	@Override
	public void render () {
		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
		batch.begin();
		batch.draw(result, 0, 0);
		batch.end();
	}
}