Android Open Source - geoar-app Bounding Box

• Back to Location/Application  ↑

From Project

Back to project page geoar-app.

License

The source code is released under:

Apache License

Java Source Code

/**
 * Copyright 2012 52North Initiative for Geospatial Open Source Software GmbH
 *//from  w ww  .  j  a v a2 s .  com
 * 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 org.n52.geoar.view.geoar.gl.mode;

import java.nio.FloatBuffer;

/**
 * 
 * @author Arne de Wall
 *
 */
public class BoundingBox {
  
  private float[][] boundingPoints;
  
  public BoundingBox(float[] vertices){
    this.boundingPoints = new float[8][3];
    
    float[] min = { Float.MAX_VALUE, Float.MAX_VALUE, Float.MAX_VALUE };
    float[] max = { Float.MIN_VALUE, Float.MIN_VALUE, Float.MIN_VALUE };
    
    float[] vertex = new float[3];
    
    for(int i = 0; i < vertices.length; i+=3){
      vertex[0] = vertices[i];
      vertex[1] = vertices[i+1];
      vertex[2] = vertices[i+2];
      
      min[0] = Math.min(min[0], vertex[0]);
      max[0] = Math.max(max[0], vertex[0]);
      min[1] = Math.min(min[1], vertex[1]);
      max[1] = Math.max(max[1], vertex[1]);
      min[2] = Math.min(min[2], vertex[2]);
      max[2] = Math.max(max[2], vertex[2]);
    }
    
    boundingPoints[0] = new float[] { min[0], min[1], min[2] }; // -x,-y,-z
    boundingPoints[1] = new float[] { min[0], min[1], max[2] }; // -x,-y,z
    boundingPoints[2] = new float[] { max[0], min[1], max[2] }; // x,-y,z
    boundingPoints[3] = new float[] { max[0], min[1], min[2] }; // x,-y,-z

    boundingPoints[4] = new float[] { min[0], max[1], min[2] }; // -x, y, -z
    boundingPoints[5] = new float[] { min[0], max[1], max[2] }; // -x, y, z
    boundingPoints[6] = new float[] { max[0], max[1], max[2] }; // ...
    boundingPoints[7] = new float[] { max[0], max[1], min[2] };
  }

  @Deprecated
  private void generateBoundingBox() {
    // get vertices of geometry
    FloatBuffer vertices = null; // geometry.getVerticesBuffer();
    vertices.rewind(); // set position to zero

    float[] min = { Float.MAX_VALUE, Float.MAX_VALUE, Float.MAX_VALUE };
    float[] max = { Float.MIN_VALUE, Float.MIN_VALUE, Float.MIN_VALUE };

    float[] vertex = new float[3];

    while (vertices.hasRemaining()) {
      vertex[0] = vertices.get(); // x
      vertex[1] = vertices.get(); // y
      vertex[2] = vertices.get(); // z

      min[0] = Math.min(min[0], vertex[0]);
      max[0] = Math.max(max[0], vertex[0]);
      min[1] = Math.min(min[1], vertex[1]);
      max[1] = Math.max(max[1], vertex[1]);
      min[2] = Math.min(min[2], vertex[2]);
      max[2] = Math.max(max[2], vertex[2]);
    }

    boundingPoints[0] = new float[] { min[0], min[1], min[2] }; // -x,-y,-z
    boundingPoints[1] = new float[] { min[0], min[1], max[2] }; // -x,-y,z
    boundingPoints[2] = new float[] { max[0], min[1], max[2] }; // x,-y,z
    boundingPoints[3] = new float[] { max[0], min[1], min[2] }; // x,-y,-z

    boundingPoints[4] = new float[] { min[0], max[1], min[2] }; // -x, y, -z
    boundingPoints[5] = new float[] { min[0], max[1], max[2] }; // -x, y, z
    boundingPoints[6] = new float[] { max[0], max[1], max[2] }; // ...
    boundingPoints[7] = new float[] { max[0], max[1], min[2] };
  }

}

Java Source Code List

• Back to Location/Application  ↑