Android Open Source - Schooner-3D Coords Converter

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright 2012 Dan Mercer/*from  w w w. java2  s . 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 com.supermercerbros.gameengine.hud;

/**
 * 
 */
public class CoordsConverter {
  private final int width;
  private final int halfWidth;
  private final int height;
  private final int halfHeight;

  /**
   * Constructs a new CoordsConverter
   */
  CoordsConverter(int width, int height) {
    this.width = width;
    this.halfWidth = width / 2;
    this.height = height;
    this.halfHeight = height / 2;
  }
  
  public float toOpenGLWidth(float pixelX) {
    return (pixelX - halfWidth) / width;
  }
  
  public float toOpenGLHeight(float pixelY) {
    // Y is made negative because the Android UI's origin is in the top
    // left corner.
    return -(pixelY - halfHeight) / height;
  }
}

Java Source Code List

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