Okay so, if you want a smooth moving along the different waypoint and "on the road", you need to translate you camera. Or to set a new position on the duration. My solution is if you have a game cycle, you need to update the position of the camera between 2 waypoints.

int wayID;
int wayIDMax = waypoint.lenght;
float percent = 0;

function boolean moveAlongRoad(){
     Camera c = world.getCamera();
     // Adjust it with your duration of your game cycle
     float addPercent= 0.1;
     
     if(wayID < wayIDMax-1){
          c.setPosition(waypoint[wayID].getPosition.add(waypoint[wayID+1].sub(waypoint[wayID])*percent));
          percent += addPercent;
     } else {
          // Run finished
          return true;
     }
     
     if(addPercent >= 1){
          wayID++;
     }

     return false;
}
But for a perfect behavior, you need to apply this to an invisble object in front of your camera (Or just use a fictive position), translate the camera too but with a lower percentage, and do a "lookAt" to your camera on this object juste in front of it.
You camera will follow the path of your waypoint and always look in front of itself, on the road.

If you want to control exactly the view of the camera, you need to create other waypoint only for the invisible object, but it's more complicated to syncronyze both and more long to create a lots of waypoint. But it can work.

If you get a lot of waypoints (to make the line very smooth and realistic), you can translate IA car from one to the other waypoint and do like an AI behavior.

I don't know how are programmed AI of car in racing game. Maybe it's not a good solution, but you can do what you want to do with this method.

You can't locate the car on the world ? Why ?

2 ideas about place waypoint :

• Place waypoint into the 3D model of the map with a specific name "way_point_X", and when you place the road on the world, just search model with this name. And memorise positions on the world. It's the waypoint for the car.
• Use XML to write by hand before. With a node correspond to one waypoint and have 3 attributs (Coordinates). With this way, you can write into the file and add some "best time" at each way point for show how is the best time of the player.

And I never do a clever algorithm, so I can't help you.

Hello everyone !

I'm coming here today because I have a problem about transparency on my 3D object. I put a transparent texture on one object 3D, and, here's my problem, nothing behinde if display. I have a CameraView on the background and I can see it. But there's is object between my transparent object and my background...

I must enable any Z-order renderer of anything like that ?

Okay, I understand but what is weird is when I apply ma matrix on my camera, the view is deformed. And the camera is not oriented correctly, I'm sur.

When I get the matrix data, I transform it to a 4x4 matrix and I dump to the matrix of the camera :

gyroMatrix = getRotationMatrixFromOrientation(fusedOrientation);
                       
float[] arr4x4 = new float[16];
           
for(int i = 0; i < 9; i++){
    arr4x4[i] = gyroMatrix[i];
}
arr4x4[3] = 0;
arr4x4[7] = 0;
arr4x4[11] = 0;
arr4x4[12] = 0;
arr4x4[13] = 0;
arr4x4[14] = 0;
arr4x4[15] = 1;
           
scene.xyzMatrix.setDump(arr4x4);

And in my cycle of rendering I update the camera with :

Camera worldcam = world.getCamera();

worldcam.setBack(xyzMatrix);

I don't understand what I doing wrong because I think I do everything good...

Hello everyone !

I write it today because I have a problem with the orientation of a jPCT camera. I use the sensor of the device to do augmented reality. I use this tutorial to get the differents values [http://www.thousand-thoughts.com/2012/03/android-sensor-fusion-tutorial/] (Because the easy way is too noisy). I get a rotation matrix and 3 angles (Pitch, roll and Azimuth).

So I want to use the 3 angles with a simple rotateCameraAxis. But I can't because the 3 values ar not independant and when I rotate on 1 axis, others moves and I can't rotate for the 2 others. (I you have a solution, say it, I'm happy to read it !)

The second way to rotate the camera is to use the rotation matrix. I convert it to a 4x4 matrix and fill with 0 and one 1, I base it on cols. But it don't work. And more, my view is totally deformed. My modles are very stranges... Anyone have a solution about it ?

How can I use the 3 angles or the matrix to rotate my camera ?

Thanks !

Hello everyone !

My problem today is that I use 2 SurfaceView at the same time in my AR software. One is for display the camera of the device. It's a custum class that extends SurfaceView :
public class CameraView extends SurfaceView implements SurfaceHolder.Callback
 The second is a GLSurfaceView where I render all my objects with jPCT :
setmGLView(new GLSurfaceView(this.application));
setCameraView(new CameraView(this.context));

setRenderer(new MyRenderer());
getmGLView().setRenderer(getRenderer());
getRenderer().initialize();
But when the both are display, a little lag come. But when I display only one, it's good and very fluent.

Maybe It's not the good solution to display my camera on an other SurfaceView. But I don't understand how to correct the problem and delete the lag. Anyone have an idea ?