Android Open Source - TicTacToe3D Sphere

From Project

Back to project page TicTacToe3D.

License

The source code is released under:

MIT License

If you think the Android project TicTacToe3D listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.

Java Source Code

/**
 * Classe que desenha uma esfera //from  w  w w .ja  va2 s. com
 *  
 *  Refer?ncia: 
 *  http://stackoverflow.com/questions/6072308/problem-drawing-a-sphere-in-opengl-es
 *  
 *  Em desenvolvimento
 * 
 */
package com.unibh.dcet.ccc.android.tictactoe3d.view.obsolete;

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

import javax.microedition.khronos.opengles.GL10;

public class Sphere {

    static private FloatBuffer sphereVertex;
    //static private FloatBuffer sphereNormal;
    static float sphere_parms[]=new float[3];

    double mRaduis;
    double mStep;
    float mVertices[];
    private static double DEG = Math.PI/180;
    int mPoints;

    /**
     * The value of step will define the size of each facet as well as the number of facets
     *  
     * @param radius
     * @param step
     */

    public Sphere( float radius, double step) {
        this.mRaduis = radius;
        this.mStep = step;
        sphereVertex = ByteBuffer.allocateDirect(40000).order( ByteOrder.nativeOrder() ).asFloatBuffer(); 
        mPoints = build();
    }

    
    public void draw(GL10 gl) {
        gl.glFrontFace(GL10.GL_CW);
        gl.glVertexPointer(3, GL10.GL_FLOAT, 0, sphereVertex);

        gl.glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
        //gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, mPoints);
        gl.glDrawArrays(GL10.GL_POINTS, 0, mPoints);
    }

    private int build() {

        /**
         * x = p * sin(phi) * cos(theta)
         * y = p * sin(phi) * sin(theta)
         * z = p * cos(phi)
         */
        double dTheta = mStep * DEG;
        double dPhi = dTheta;
        int points = 0;

        for(double phi = -(Math.PI); phi <= Math.PI; phi+=dPhi) {
            //for each stage calculating the slices
            for(double theta = 0.0; theta <= (Math.PI * 2); theta+=dTheta) {
                sphereVertex.put((float) (mRaduis * Math.sin(phi) * Math.cos(theta)) );
                sphereVertex.put((float) (mRaduis * Math.sin(phi) * Math.sin(theta)) );
                sphereVertex.put((float) (mRaduis * Math.cos(phi)) );
                points++;
            }
        }
        sphereVertex.position(0);
        return points;
    }
}

Java Source Code List