Thanks for your answer.

I wrote the following code:

       int vertices = object3D.getMesh().getUniqueVertexCount();
        Log.d(TAG," vertices = " + vertices);

        float[] data = new float[4*vertices];

        for(int i = 0; i < data.length; i++){
           
            data = 0.0f;
           
            if(i%3 == 1)
                data = 1f;
           
           
        }
         
        VertexAttributes  vattrs = new VertexAttributes("colorinfo",data,VertexAttributes.TYPE_FOUR_FLOATS);

        object3D.getMesh().addVertexAttributes(vattrs);
       
        GLSLShader  shader = new  GLSLShader( Loader.loadTextFile(mActivity.getResources().openRawResource(R.raw.vertexshader)),Loader.loadTextFile(mActivity.getResources().openRawResource(R.raw.fragmentshader)));

        object3D.setShader(shader);
       
       object3D.strip();
       object3D.build();
       world.addObject(object3D);

 The vertex shader is:

attribute vec4 colorinfo;
uniform mat4 modelViewProjectionMatrix;
attribute vec4 position;
varying vec4 vertexColor;


void main(void)
{
     vertexColor = colorinfo;
     gl_Position = modelViewProjectionMatrix * position;

}
 
And the fragment shader is:

varying vec4 theColor;
varying vec4 vertexColor;


void main(void)
{
 gl_FragColor = vertexColor;
}

I think that works . Am i correct? 

Also I have a question about the  method:


Object3D obj = Object3D(float[] coordinates, float[] uvs, int[] indices, int textureId) 

How can I apply material info in this case to Object3D obj?

Thanks in advance.

Many thanks.
 

Hi,

Im thinking to start a racing game.

But i dont know the best way to build the road.

Should I use plane 3D objects ?
Should I load the parts of the road once at the begining of the game or dynamically?


Thanks in advance

it works.

thanks

Hi,

I use opengle 1.x

I use the following code to build a bitmap from FrameBuffer:

The FrameBuffer is resized to  128x128.

The Bitmap renderImage  is used as a bitmap for an ImageView view.


   public void onDrawFrame(GL10 gl) {
      
      coinObject3D.rotateY((float) (Math.PI/180.0f));
      cube.rotateY((float) (Math.PI/180.0f) * -1);
      
      //cube.translate(x, y, z)
      prevXRot  = xrot;
      prevYRot  = yrot;
      prevZRot  = zrot;
      
            
      fb.clear(back);
      int w = fb.getWidth();
          int h = fb.getHeight();
      
    
       world.renderScene(fb);
      
       int[] tmpPixels = fb.getPixels();
      
       
        renderImage = Bitmap.createBitmap(tmpPixels, fb.getWidth(), fb.getHeight(), Config.RGB_565);
       Log.d("TAG", "width = "  + fb.getWidth());
      Log.d("TAG", "height = " + fb.getHeight());
      
      world.draw(fb);
      
      //fb.runPostProcessors();
      fb.display();
      
      

      if (System.currentTimeMillis() - time >= 1000) {
         Logger.log(fps + "fps");
         fps = 0;
         time = System.currentTimeMillis();
      }
      
      fps++;
   }


Thanks in advance

 Thanks for the help.
 I'm sure your answer will be usefull to complete the project.

In the project  i have  to show dynamically 3d objects on the surface of the camera.

The renderer engine is notified by AR engine that a new 3d Object is ready to be displayed on camera's surface.
The 3d object is stored by AR engine dynamically in a data buffer.

So the renderer engine reads from the data buffer the content, parses the content, and then must show the 3d object on camera's surface.

Do you think that this will work with jPCT-AE?

Before parsing the contents of the data buffer I must know the type of 3d Object (.3ds,.obj ...)?

I need to specify the location of texture images?


Thanks in Advance

Hi,

I'm working in a Augmented Reality project using jPCT-AE as the rendering engine.


I need to load dynamically on the camera surface a 3D Object from a data buffer (memory) not from  the raw or assets directory.

Is it possible?

Thanks in advance