Android Open Source - gameroots Texture Joystick Renderer

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License

The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUC...

Java Source Code

/*******************************************************************************
 * Copyright 2013 See AUTHORS file.//w w  w  .  j a  v  a 2s .c o m
 * 
 * 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 de.voodoosoft.gameroots.client.gdx.view.input.impl;

import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.math.Circle;
import com.badlogic.gdx.math.Vector2;

import de.voodoosoft.gameroots.client.gdx.view.input.IVirtualJoystickRenderer;
import de.voodoosoft.gameroots.client.gdx.view.input.VirtualJoystick;



/**
 * Joystick renderer which paints joystick and knob with texture images.
 * <p>
 * The knob can either be drawn at the touch position or at the snap position.
 * </br>Textures must be created and disposed externally.
 * 
 * @see #setDrawSnappedKnob(boolean)
 * @see VirtualJoystick#setPositionCount(int)
 */
public class TextureJoystickRenderer implements IVirtualJoystickRenderer {

  /**
   * Creates a new renderer for the given <code>SpriteBatch</code>. 
   * 
   * @param batch <code>SpriteBatch</code> to use.
   */
  public TextureJoystickRenderer(SpriteBatch batch) {
    this.batch = batch;
  }

  /**
   * Creates a new renderer.
   * 
   * @param batch  <code>SpriteBatch</code> to use.
   * @param joystickRegion <code>TextureRegion</code> to draw the joystick
   * @param knobRegion <code>TextureRegion</code> to draw the knob
   */
  public TextureJoystickRenderer(SpriteBatch batch, Texture joystickRegion, Texture knobRegion) {
    this.batch = batch;
    this.joystickRegion = joystickRegion;
    this.knobRegion = knobRegion;
  }

  /**
   * Decides whether to draw the knob at the touch or at the snapped position.
   * 
   * @param drawSnappedKnob true to draw snap position
   */
  public void setDrawSnappedKnob(boolean drawSnappedKnob) {
    this.drawSnappedKnob = drawSnappedKnob;
  }

  /**
   * Sets <code>TextureRegion</code> for drawing the joystick.
   * 
   * @param joystickRegion
   */
  public void setJoystickTexture(Texture joystickRegion) {
    this.joystickRegion = joystickRegion;
  }

  /**
   * Sets <code>TextureRegion</code> for drawing the knob.
   * 
   * @param knobRegion
   */
  public void setKnobTexture(Texture knobRegion) {
    this.knobRegion = knobRegion;
  }

  /**
   * Specifies the knob size by setting its radius.
   * 
   * @param knobRadius radius
   */
  public void setKnobRadius(float knobRadius) {
    this.knobRadius = knobRadius;
  }

  @Override
  public void paint(Circle circle, Vector2 knobDirection, float knobX, float knobY) {
    batch.draw(joystickRegion, circle.x - circle.radius, circle.y - circle.radius);

    if (drawSnappedKnob) {
      float x = circle.x - knobRadius + knobDirection.x * circle.radius;
      float y = circle.y - knobRadius + knobDirection.y * circle.radius;
      batch.draw(knobRegion, x, y);
    }
    else {
      batch.draw(knobRegion, knobX - knobRadius, knobY - knobRadius);
    }
  }

  private Texture joystickRegion;
  private Texture knobRegion;
  private SpriteBatch batch;
  private boolean drawSnappedKnob;
  private float knobRadius;
}

Java Source Code List

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