A tiny class for remapping a box:
import com.jme.math.Vector2f;
import com.jme.scene.shape.Box;
import java.nio.FloatBuffer;
/**
*
* @author DGronau
*/
public class BoxRemapper {
public static final int BACK = 1;
public static final int RIGHT = 2;
public static final int FRONT = 4;
public static final int LEFT = 8;
public static final int TOP = 16;
public static final int BOTTOM = 32;
public static final int ALL = 63;
private float tex[] = new float[]{
1,0, 0,0, 0,1, 1,1,
1,0, 0,0, 0,1, 1,1,
1,0, 0,0, 0,1, 1,1,
1,0, 0,0, 0,1, 1,1,
1,0, 0,0, 0,1, 1,1,
1,0, 0,0, 0,1, 1,1
};
/**
* Give the coordinates in the following order:
* bottom right, bottom left, top left, top right.
* For rotating or mirroring change the order.
* The coordinates don't have to be rectangular,
* so you can create distortions.
* @param side int the side that should be set, sides can be added together
* @param coords the coordinates of the texture
*/
public void setSide(int side, Vector2f... coords) {
if (coords.length != 4) {
throw new IllegalArgumentException("Requires 4 Vector2f objects.");
}
setSide(side, coords[0].x, coords[0].y,
coords[1].x, coords[1].y,
coords[2].x, coords[2].y,
coords[3].x, coords[3].y);
}
/**
* Give the coordinates in the following order:
* bottom right, bottom left, top left, top right.
* For rotating or mirroring change the order.
* The coordinates don't have to be rectangular,
* so you can create distortions.
* @param side the side that should be set, sides can be added together
* @param coords the coordinates of the texture
*/
public void setSide(int side, float... coords) {
if (coords.length != 8) {
throw new IllegalArgumentException("Requires 8 floats.");
}
for(int i = 0; i < 6; i++) {
int n = 1 << i;
if ((side & n) > 0) {
System.out.println("writing side " + i);
for (int t = 0; t < 8; t++) {
tex[t + 8*i] = coords[t];
}
}
}
}
/**
* The Box to be remapped
* @param box the box
*/
public void remap(Box box) {
FloatBuffer fb = box.getTextureBuffer(0, 0);
fb.rewind();
fb.put(tex);
}
}
Imagine you have a texture which has 4 quarters, and you want the top left quarter at front and back, the top right quarter at right, the bottom left quarter at left and the bottom right quarter at up and bottom of your box. Then you'd write (out of my head, beware of typos):
import static BoxRemapper.*; //too lazy to type the constants
BoxRemapper br = new BoxRemapper();
br.setSide(FRONT + BACK, 0.5f, 0.5f, 0, 0.5f, 0, 1, 0.5f, 1);
br.setSide(RIGHT, 1, 0.5f, 0.5f, 0.5f, 0.5f, 1, 1, 1);
br.setSide(LEFT, 0.5f, 0, 0, 0, 0, 0.5f, 0.5f, 0.5f);
br.setSide(UP+DOWN, 1, 0, 0.5f, 0, 0.5f, 0.5f, 1, 0.5f);
br.remap(box)
If you have any ideas to simplify the remapping further, let me know...
