Android Open Source - 101AndroidApps Grid

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License

The source code is released under:

Licenced under the Creative Commons Attribution 4.0 licence. For full text see http://creativecommons.org/licenses/by/4.0/

Java Source Code

package com.hulzenga.ioi.android.util.open_gl.geometry;
/*from  w w  w. j  a  v a 2 s . c o m*/
import com.hulzenga.ioi.android.util.open_gl.vector.Vec3;

import java.util.List;

public class Grid extends Geometry {

  public Grid(float x, float z, int xSteps, int zSteps) {
    List<Vec3> vertices = getVertices();
    List<Vec3> normals = getNormals();
    List<Vec3> textureCoordinates = getTextureCoordinates();
    List<Short> indices = getIndices();

    float xStep = x / ((float) xSteps);
    float zStep = z / ((float) zSteps);

    //define vertices, normals and texture coordinates
    for (int i = 0; i <= xSteps; i++) {
      for (int j = 0; j <= zSteps; j++) {
        vertices.add(new Vec3(-x / 2.0f + i * xStep, 0.0f, -z / 2.0f + j * zStep));
        normals.add(new Vec3(0.0f, 1.0f, 0.0f));
        textureCoordinates.add(new Vec3(((float) i) / ((float) xSteps), 1.0f, ((float) j) / ((float) zSteps)));
      }
    }

    //add indices
    for (int i = 0; i < xSteps; i++) {
      for (int j = 0; j < zSteps; j++) {
        //different pattern for odd and even to break up the pattern
        if ((j %2 != 0 && i %2 != 0) || (j %2 == 0 && i %2 == 0)) {
          indices.add((short) (i * (zSteps + 1) + j + 0));
          indices.add((short) (i * (zSteps + 1) + j + 1));
          indices.add((short) ((i + 1) * (zSteps + 1) + j));

          indices.add((short) ((i + 1) * (zSteps + 1) + j));
          indices.add((short) (i * (zSteps + 1) + j + 1));
          indices.add((short) ((i + 1) * (zSteps + 1) + j + 1));
        } else  {
          indices.add((short) (i * (zSteps + 1) + j + 0));
          indices.add((short) ((i + 1) * (zSteps + 1) + j + 1));
          indices.add((short) ((i + 1) * (zSteps + 1) + j));

          indices.add((short) (i * (zSteps + 1) + j + 0));
          indices.add((short) (i * (zSteps + 1) + j + 1));
          indices.add((short) ((i + 1) * (zSteps + 1) + j + 1));
        }
      }
    }


  }
}

Java Source Code List

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