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Sorting between transparent objects is done based on the z-coordinate of the object's center in world space. The sort offset that you apply modifies this z-coordinate. In your case, it looks like as if the water plane is always below everything, so you should give it some high positive sort offset to push it back into the sorted list.
float distanceToDestination = localPlayer.getTransformedCenter().calcSub(dest).length(); // XXX
if (distanceToDestination <= 100) {
// Here, I would translate the local player in my game <distanceToDestination> world units.
}
NORTH(0, (float) Math.PI * 2),
NORTHEAST(1, ((float) Math.PI * 7) / 4),
... etc
private void turnTo(Mob mob, SimpleVector dest) {
// TODO calculate correct angle between location and destination
float angle = mob.getTransformedCenter().calcAngle(dest); // problem here ??
System.out.println("angle="+angle);
// Find closest direction
Direction dir = Direction.getClosestDirectionForAngle(angle);
mob.updateDirection(dir);
Difficult...i have no clever idea for solving this. The terrain example that you are referring to uses vertex alpha to do the blending. That requires multiple rendering passes and to use alpha values for blending, you actually have to have something to blend into. In your case, that would mean that objects would have to overlap/tiles which against the idea of using tiles.
In my current Android project, i'm using shaders and a splatting texture to do it, but again, this doesn't transfer very well to tiles. IMHO, i might work best to create additional textures that do the blending, i.e. if sand touches grass, create a texture in which sand slowly fades into grass. One of the earlier jPCT projects (Technopolis) did that and the results were pretty nice:
This happened for odd widths/heights only. It was a problem with the way resize() was calculating the framebuffer's center. It should be fixed in this jar: jpct.de/download/beta/jpct.jar
