Android Open Source - TicTacToe3D T T T3d Grid Shape

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License

The source code is released under:

MIT License

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Java Source Code

/**
 * Classe que desenha uma camada em forma de grade ("grid") 
 * do jogo da velha 3D/*from  ww  w  .j  av  a 2  s.c o  m*/
 *  
 * 
 */
package com.unibh.dcet.ccc.android.tictactoe3d.view;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

import javax.microedition.khronos.opengles.GL10;

/**
 * Classe que desenha a forma de uma grade de uma das camadas 
 * para o jogo da velha 3D
 * 
 */
public class TTT3dGridShape {

  private FloatBuffer vertexBuffer;  // Buffer for vertex-array
  private int nVertices;
  
  /**
   * 
   */
  public TTT3dGridShape(int dimensao, float unidade) {
    // 
    float[] vertices;
    // n?mero de v?rtice = (dimensao + 1) (uma linha extra para fechar)  
    //                     * 2 linhas (uma no eixo x e outra no eixo z)
    //                     * 2 pontos por linhas (pi>pf)
    //                     * 3 coordenadas por ponto p(xyz)
    nVertices = (dimensao+1)*12;
    vertices = new float[nVertices];
    
    float largura = (unidade * dimensao);
    
    int i, indiceVertice = 0;
    float posZ = 0;
    // linhas paralelas ao exio x
    for (i = 0; i <= dimensao; i++) {
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++] = posZ;  
      vertices[indiceVertice++] = largura;  
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++]   = posZ;  
      posZ += unidade;
    }
    float posX = 0;
    // linhas paralelas ao exio z
    for (i = 0; i <= dimensao; i++) {
      vertices[indiceVertice++] = posX;  
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++] = posX;  
      vertices[indiceVertice++] = 0;  
      vertices[indiceVertice++]   = largura;  
      posX += unidade;
    }
    // Setup vertex array buffer. Vertices in float. A float has 4 bytes
    ByteBuffer vbb = ByteBuffer.allocateDirect(vertices.length * 4);
    vbb.order(ByteOrder.nativeOrder()); // Use native byte order
    vertexBuffer = vbb.asFloatBuffer(); // Convert from byte to float
    vertexBuffer.put(vertices);         // Copy data into buffer
    vertexBuffer.position(0);           // Rewind  
  }

  // Render the shape
  public void draw(GL10 gl) {
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glLineWidth(1f);
    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glDrawArrays(GL10.GL_LINES, 0, nVertices / 3);
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
  }

}

Java Source Code List