Android Open Source - Look Obj Mesh3 D

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License

The source code is released under:

====================== LOOK! LICENSING TERMS ====================== look! is licensed under the BSD 3-Clause (also known as "BSD New" or "BSD Simplified"), as follows: Copyright (c) 2010-2012, Look...

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Java Source Code

/**
*-----------------------------------------------------------------------------
* Copyright (c) 2012, Look! Development Team
* All rights reserved.//from  ww  w. jav a  2 s  .  c  o m
*
* Distributed under the terms of the BSD Simplified License.
*
* The full license is in the LICENSE file, distributed with this software.
*-----------------------------------------------------------------------------
*/
package es.ucm.look.ar.ar3D.core.drawables.primitives;

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

import javax.microedition.khronos.opengles.GL10;

import android.content.Context;
import es.ucm.look.ar.ar3D.core.drawables.Mesh3D;
import es.ucm.look.ar.ar3D.parser.MeshObjParser;
import es.ucm.look.ar.math.collision.SphericalArmature;

public class ObjMesh3D extends Mesh3D {
  private FloatBuffer vertexBuffer;
  private FloatBuffer normalBuffer;
  private FloatBuffer textureBuffer;
  private int numVertices;

  public ObjMesh3D(Context c, int resourceId) {
    create( c.getResources().openRawResource(resourceId) );
  }
  
  public ObjMesh3D(InputStream inputStream){
    create(inputStream);
  }
  
  public void create( InputStream inputStream ){
    MeshObjParser parser = new MeshObjParser();
    if (parser.parse(inputStream)) {

      float vertices[] = parser.getVertices();

      ByteBuffer byteBuf = ByteBuffer.allocateDirect(vertices.length * 4);
      byteBuf.order(ByteOrder.nativeOrder());
      vertexBuffer = byteBuf.asFloatBuffer();
      vertexBuffer.put(vertices);
      vertexBuffer.position(0);

      numVertices = vertices.length / 3;

      float normals[] = parser.getNormals();

      ByteBuffer byteBuf2 = ByteBuffer.allocateDirect(normals.length * 4);
      byteBuf2.order(ByteOrder.nativeOrder());
      normalBuffer = byteBuf2.asFloatBuffer();
      normalBuffer.put(normals);
      normalBuffer.position(0);

      float texture[] = parser.getTextureCoords();

      ByteBuffer byteBuf4 = ByteBuffer.allocateDirect(texture.length * 4);
      byteBuf4.order(ByteOrder.nativeOrder());
      textureBuffer = byteBuf4.asFloatBuffer();
      textureBuffer.put(texture);
      textureBuffer.position(0);

      armature = new SphericalArmature(parser.getCenter(),
          parser.getRadius());
    }
  }

  public void draw(GL10 gl) {

    gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
    gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, textureBuffer);

    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glEnableClientState(GL10.GL_NORMAL_ARRAY);

    gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);
    gl.glNormalPointer(GL10.GL_FLOAT, 0, normalBuffer);

    gl.glDrawArrays(GL10.GL_TRIANGLES, 0, numVertices);

    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisableClientState(GL10.GL_NORMAL_ARRAY);

    gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY);
  }

}

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