I tweaked a bit the bitmaps (size, JPEG compression, seamless) and it looks quite good now. I also followed your advice on the "onSurfaceCreated". That didn't make a noticeable performance change but am convinced that it is better to put the code there.

Performance is better now but there is a huge correlation between performance and the amount of time  textures are repeated. I guess this is good in a way, it makes me bear in mind technical limitations rather than just making everything "hi-res"



Thx
Nicolas

Thank you for your suggestion. I ended up "gridifying" all my large planes, and marking all edges as "seem" in blender. After UVMap, it looks much better:



I will spend a bit more time on it to see if I can fix the few border artifacts, if not, will try your suggestion.

Thanks!
Nicolas

Hello,

I am building a 3D world, and in Blender I have set the textures to repeat over my models. I get the following in Blender:



ie the texture does repeat.

In JPCT however, the texture seems to strecth and distort:



I have not explicitely set any repeat attribute in JPCT as I could not find any (thought it would read from the 3DS file). I load the texture and the model with the following codes.

final Texture sea = new Texture(Flight.getInstance().getResources().openRawResource(R.raw.seaday));
TextureManager.getInstance().addTexture("seaday.jpg", sea);

Object3D[] model = Loader.load3DS(file, scale);
Object3D o3d = new Object3D(0);
Object3D temp = null;
for (int i = 0; i < model.length; i++) {
    temp = model[i];
    temp.setCenter(SimpleVector.ORIGIN);
    temp.rotateX((float)( -.5*Math.PI));
    temp.rotateMesh();
    temp.setRotationMatrix(new Matrix());
    o3d = Object3D.mergeObjects(o3d, temp);
    o3d.build();
}
return o3d;

Is there a way to specify a repeat ratio in JPCT (something like "wrapTextureSpherical" but with repeat?)

Thanks
Nicolas

I tried to use plane.getTransformedCenter as you recommended and I agree the figures I see make much more sense. I am not sure I understand why however.

If org is the position in world space from where the translation starts, it seems correct to me to start translating the ground from where it is (ground.getTransformedCenter()) with a vector which is opposite to the plane's movement. This is equivalent as moving the plane towards the ground with its own motion vector.

Moreover, if I calculate such distance from the plane center, this does not allow me to do what I was initially trying to do which is to find out which part of the plane hits the ground.

I agree that on my picture there is no collision - it was more to show a generic case. But even when I fly trough the object representing the water, I do not get a collision.

I have tried your suggestion. I changed the collision detection method to:

public float checkCollision(SimpleVector sv)
{
sv = sv.normalize();
final float minDist = ground.calcMinDistance(ground.getTransformedCenter(), sv);
if(!(minDist == Object3D.COLLISION_NONE))
{
Log.e("Collision", Float.toString(minDist));
}
return null;
}

Collision is almost never triggered when I fly trough the plane, but is sometimes randomely triggered for some minDist figures around 50.

I strongly suspect that I am doing something wrong, perhaps with the coordinates system, but could not find anything obvious. I have even changed the translation vector sv to always point straight up towards the plane.

Would you mind if I sent you my two models? Without textures, but they should still load properly. I load them via the code pasted a few messages above. For the plane, I do not set any collision attributes. For the ground, I set

ground.setCollisionMode(Object3D.COLLISION_CHECK_OTHERS);
ground.setCollisionOptimization(Object3D.COLLISION_DETECTION_OPTIMIZED);

Many thanks
Nicolas

Hello

I have been reading the documentation on collisions, as well as existing resource on this forum, but could not find my answer. I am trying to detect collisions between a complex object (a plane) and the ground which can be considered as a plane (it is actually an assembly of several planes grouped into one Object3D loaded via the 3DS loader).

From what I have read, if I do not want to consider the plane as an ellipsoid (I need to be accurate for example for the landing gear, the wings etc - I have tried the Ellipsoid but this did not provide accurate enough results), I need to set the ground to COLLISION_OTHERS and check collisions from it calling "checkCollision". I have now two options (let's say two as Spherical and Ellipsoid are roughly the same here).

- If I check for collisions using a casted ray from the ground, my understanding is that this does not return the new translation vector which is collision free. This is no good to me as the plane needs to "fit" the ground on landing.
- If I check for collisions using an Ellipsoid, I will need to "wrap" the ground into an Ellipsoid. Problem is that the ground is huge compared to the plane and this would not be accurate enough.

What I would be looking for really is to calculate collisions between two complex Object3D. Is this possible with the current JPCT framework and have I missed something? Or should I look for another collision detector framwork?

Thanks in advance.
Nicolas

EgonOlsen,

I sent you a workspace in a private message. You should see the behaviour described above..

Thanks
Tishu