Hey guys

In ImageTargets application i want to initially show a 3D model and then when user touches the screen another 3D model should come on the same tracker image. 

In the ImageTargets.java file i have added this piece of code which intimates the cpp file when the user touches the screen 

I have modified the ImageTargets.cpp as follows :-

 public boolean onTouchEvent(MotionEvent event) {

    // TODO Auto-generated method stub

    int eventId = event.getAction();

     switch (eventId){

    case MotionEvent.ACTION_DOWN:

   callFromJava();  

break;

    }

    return super.onTouchEvent(event);

    }

After this i have done the changes in the ImageTargets.cpp file. I have added the callFromJava() function in the file as follows :-

Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargets_callFromJava(JNIEnv *, jobject)

{

modelId = 1 ;

//return 1;

}

where modelId is the int variable in the file. After this i have done the following code in the renderFrame() method to add logic i.e. when application starts the modelId variable is 0 and when user touches the screen modelId = 1 and according to this the other 3D model should load . I have created another 3D model .h file and it works well separately so there should no be any issue in it. 

#ifdef USE_OPENGL_ES_1_1

        // Load projection matrix:

        glMatrixMode(GL_PROJECTION);

        glLoadMatrixf(projectionMatrix.data);

        // Load model view matrix:

        glMatrixMode(GL_MODELVIEW);

        glLoadMatrixf(modelViewMatrix.data);

        glTranslatef(0.f, 0.f, kObjectScale);

        glScalef(kObjectScale, kObjectScale, kObjectScale);

        // Draw object:

        glBindTexture(GL_TEXTURE_2D, thisTexture->mTextureID);

        if(modelId == 1){

         glTexCoordPointer(2, GL_FLOAT, 0, (const GLvoid*) &teapotTexCoords[0]);

        glVertexPointer(3, GL_FLOAT, 0, (const GLvoid*) &teapotVertices[0]);

        glNormalPointer(GL_FLOAT, 0,  (const GLvoid*) &teapotNormals[0]);

        glDrawElements(GL_TRIANGLES, NUM_TEAPOT_OBJECT_INDEX, GL_UNSIGNED_SHORT,

                       (const GLvoid*) &teapotIndices[0]);

        LOG("modelID %d", modelId);

        }else{

        glTexCoordPointer(2, GL_FLOAT, 0, (const GLvoid*) &bananaTexCoords[0]);

        glVertexPointer(3, GL_FLOAT, 0, (const GLvoid*) &bananaVerts[0]);

                glNormalPointer(GL_FLOAT, 0,  (const GLvoid*) &bananaNormals[0]);

                glDrawArrays(GL_TRIANGLES, 0, bananaNumVerts);

                LOG("modelID %d", modelId);

        }

#else

        QCAR::Matrix44F modelViewProjection;

        SampleUtils::translatePoseMatrix(0.0f, 0.0f, kObjectScale,

                                         &modelViewMatrix.data[0]);

        SampleUtils::scalePoseMatrix(kObjectScale, kObjectScale, kObjectScale,

                                     &modelViewMatrix.data[0]);

        SampleUtils::multiplyMatrix(&projectionMatrix.data[0],

                                    &modelViewMatrix.data[0] ,

                                    &modelViewProjection.data[0]);

        glUseProgram(shaderProgramID);

        if(modelId == 0){

glVertexAttribPointer(vertexHandle, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &bananaVerts[0]);

glVertexAttribPointer(normalHandle, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &bananaNormals[0]);

glVertexAttribPointer(textureCoordHandle, 2, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &bananaTexCoords[0]);

LOG("modelID %d in else", modelId);

        }else{

        glVertexAttribPointer(vertexHandle, 3, GL_FLOAT, GL_FALSE, 0,(const GLvoid*) &teapotVertices[0]);

        glVertexAttribPointer(normalHandle, 3, GL_FLOAT, GL_FALSE, 0, (const GLvoid*) &teapotNormals[0]);

        glVertexAttribPointer(textureCoordHandle, 2, GL_FLOAT, GL_FALSE, 0,(const GLvoid*) &teapotTexCoords[0]);

        LOG("modelID %d in else", modelId);

}

        glEnableVertexAttribArray(vertexHandle);

        glEnableVertexAttribArray(normalHandle);

        glEnableVertexAttribArray(textureCoordHandle);

        glActiveTexture(GL_TEXTURE0);

        glBindTexture(GL_TEXTURE_2D, thisTexture->mTextureID);

        glUniformMatrix4fv(mvpMatrixHandle, 1, GL_FALSE,

                           (GLfloat*)&modelViewProjection.data[0] );

        if(modelId == 0){

glDrawArrays(GL_TRIANGLES, 0, bananaNumVerts);

LOG("modelID %d last", modelId);

        }else{

        glDrawElements(GL_TRIANGLES, NUM_TEAPOT_OBJECT_INDEX, GL_UNSIGNED_SHORT,

                               (const GLvoid*) &teapotIndices[0]);

        LOG("modelID %d last", modelId);

        }

        SampleUtils::checkGlError("ImageTargets renderFrame");

#endif

    }

    glDisable(GL_DEPTH_TEST);

But still i am not able to see the teapot image . I can see the banana 3D model when i touch the screen. 

I have included both Teapot.h and banan.h in cpp 

Please guide me if this is not the way to achieve this goal.

Thanks in advance