Usage of different texturesin different faces and Live texture changing

Troubleshooting graphics
1

Hi, I’m quite new at jME, been using Java3D for a while now, but had some good truble with it’s way of rendering things. So, I decided to try out something new, without the need to workaround. :slight_smile: So, I’m looking for some advices.



My basic need is that I got 2d models I want to put as textures on a plane (A “plane” in here would be a box with one of the axis at 0 size, with the back culled). In order to make animations on such planes, I must replace the textures during the gameplay. Already tried swapping different textures in a separated thread, but didn’t worked out. And now I’m quite lost with how to do it.

Thanks to the help, this is now solved, by calling updateRenderState() on the boxes. :slight_smile:



Also, about swing objects, should I just simply add them on the root node, or another object should be created in order to do the on-screen interface? Didn’t tried this yet, just curious.

Edit: Tried TestjMEDesktop and found out what I needed to start. This part is solved.



And finishing, how can I put different textures on each face of, let’s say, a box? Is there a method for, or I must create my own Plane-based object and implement the textures in it?



Thanks in advance,



Diogo.

2

So, anybody? I was successful building a custom 6-side-independent box, but I'm quite sure it's not the best way around to do it. Also, how to change a texture of an object while it's live? just switching the TextureState of it for the new one won't work… :frowning:

3

i think your 6 side independent Box is the way to go, there are a few other posts about this topic somewhere in the forum.



Changing the textureState of one side of the box and calling updateRenderstate() should work to change the Texture.

4

Core-Dump beat me to it…



You could either use the six-quad box approach, or you could do it with texture coordinates. When you change textures be sure you're updating all the necessary states, like updateRenderState() and so on…

5

The texture changing worked! Thanks a lot!



Just need to try further the texture mapping. :slight_smile:

6

And that's kinda of a problem… I couldn't find anything about a 3D-shape texture mapping on the wiki. Could anybody give me a tip?

7

That is not really specific to jME. I would suggest searching online or finding a tutorial related to a modelling tool you use. Or even read the NeHe tutorials on OpenGL, that should give you a good foundation.



If you already understand this stuff, then your probably talking about setting/changing the texture coordinates. I don’t know of a specific example in jME to refer you to. Perhaps someone else does?

8

Tried using the 6-boxes once again, and graphically speaking, it worked! But, once I put more boxes together, it became a mess and really really slow at leading the graphs. I used this as code:

Box[] boxes = new Box[6];
   
    float[] cent = new float[3];
    cent[0]=cent[1]=cent[2]=0;
    float radius = 2f;
   
    boxes[0] = new Box("Box 0",new Vector3f(cent[0], cent[1]+radius, cent[2]), radius, 0, radius);
    boxes[1] = new Box("Box 1",new Vector3f(cent[0], cent[1]-radius, cent[2]), radius, 0, radius);
    boxes[2] = new Box("Box 2",new Vector3f(cent[0]+radius, cent[1], cent[2]), 0, radius, radius);
    boxes[3] = new Box("Box 3",new Vector3f(cent[0]-radius, cent[1], cent[2]), 0, radius, radius);
    boxes[4] = new Box("Box 4",new Vector3f(cent[0], cent[1], cent[2]+radius), radius, radius, 0);
    boxes[5] = new Box("Box 5",new Vector3f(cent[0], cent[1], cent[2]-radius), radius, radius, 0);
   
   
    for (x=0;x<6;x++){
        boxes[x].setModelBound(new BoundingBox());
        boxes[x].updateModelBound();
       
        if (x==0)
            u = textures.getURL("ground_grass");
        else if (x==1)
            u = textures.getURL("wall_cliffbody");
        else
            u = textures.getURL("wall_clifftop");
        ts = display.getRenderer().createTextureState();
        ts.setEnabled(true);
        ts.setTexture(
            TextureManager.loadTexture(u,
            Texture.MM_LINEAR_LINEAR,
            Texture.FM_LINEAR),0);
        boxes[x].setRenderState(ts);
       
        rootNode.attachChild(boxes[x]);
    }



nymon said:

That is not really specific to jME. I would suggest searching online or finding a tutorial related to a modelling tool you use. Or even read the NeHe tutorials on OpenGL, that should give you a good foundation.

Still, I look for better ways to do it. Read those openGL tutorials, but I still haven't figured out a way to do it decently. Could someone please give me an example of texture mapping on a box in jme?
9

Try researching UV Texture mapping. I found this blog post which will explain the concepts to you, it even has a 3D applet running to show how it looks. Neat! http://rozengain.com/?postid=45