Android Open Source - Freebloks-Android Simple Model

• Back to Graphics/3d  ↑

From Project

Back to project page Freebloks-Android.

License

The source code is released under:

GNU General Public License

Java Source Code

package de.saschahlusiak.freebloks.view;
/*from w w  w  . j  a  v  a2 s.c  o  m*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import java.nio.ShortBuffer;

import javax.microedition.khronos.opengles.GL10;

public class SimpleModel {
  int num_triangles;

    private ShortBuffer _indexBuffer;
    private FloatBuffer _vertexBuffer;
    private FloatBuffer _normalBuffer;
    private FloatBuffer _textureBuffer;

    public SimpleModel(int num_vertices, int num_triangles) {
      this.num_triangles = num_triangles;

      // float has 4 bytes
      ByteBuffer vbb = ByteBuffer.allocateDirect(num_vertices * 3 * 4);
      vbb.order(ByteOrder.nativeOrder());
      _vertexBuffer = vbb.asFloatBuffer();

      vbb = ByteBuffer.allocateDirect(num_vertices * 3 * 4);
      vbb.order(ByteOrder.nativeOrder());
      _normalBuffer = vbb.asFloatBuffer();

      // short has 2 bytes
      ByteBuffer ibb = ByteBuffer.allocateDirect(num_triangles * 3 * 2);
      ibb.order(ByteOrder.nativeOrder());
      _indexBuffer = ibb.asShortBuffer();

      ByteBuffer tbb = ByteBuffer.allocateDirect(num_vertices * 2 * 4);
      tbb.order(ByteOrder.nativeOrder());
      _textureBuffer = tbb.asFloatBuffer();
    }

    public void commit() {
      _vertexBuffer.position(0);
      _normalBuffer.position(0);
      _indexBuffer.position(0);
      _textureBuffer.position(0);
    }

  public void addVertex(float x, float y, float z, float nx, float ny, float nz, float tu, float tv) {
    _vertexBuffer.put(x);
    _vertexBuffer.put(y);
    _vertexBuffer.put(z);
    _normalBuffer.put(nx);
    _normalBuffer.put(ny);
    _normalBuffer.put(nz);
    _textureBuffer.put(tu);
    _textureBuffer.put(tv);
  }

  public void addIndex(int v1, int v2, int v3) {
    _indexBuffer.put((short)(v1));
    _indexBuffer.put((short)(v2));
    _indexBuffer.put((short)(v3));
  }

  public final FloatBuffer getVertexBuffer() {
    return _vertexBuffer;
  }
  public final FloatBuffer getNormalBuffer() {
    return _normalBuffer;
  }
  public final FloatBuffer getTextureBuffer() {
    return _textureBuffer;
  }

  public final void drawElements(GL10 gl) {
    gl.glDrawElements(GL10.GL_TRIANGLES, num_triangles * 3, GL10.GL_UNSIGNED_SHORT, _indexBuffer);
  }
}

Java Source Code List

• Back to Graphics/3d  ↑