[New] Trouble when check the picking results & [SOLVED] Trouble in putting many models(will be operated) together

[pspeed]

For using Lemur someday the best way to get started is to read the “Getting started” documentation which will help you figure out how to get started:

Getting Started

@BAO

public int getGrid(){
CollisionResults results = new CollisionResults();
Ray ray = new Ray(cam.getLocation(), cam.getDirection());
shootables.collideWith(ray, results);
if (results.size() > 0){
int cor=new int[2];
CollisionResult closest = results.getClosestCollision();
for (Spatial e:shootables.getChildren()){
if (closest.getGeometry().equals(e)){
loop:for (int i =0;i< mineField.getRow();i++){
for (int j=0;j< mineField.getCol();j++){
if (e.equals(temp[i][j])){cor[0]=i;cor[1]=j;break loop;}
}
}
}
}

            return cor;
    }
        else {return null;}
    }

For future reference, here is how you do code blocks:

How to type code blocks

Markdown code block : Embed your code in 3 backticks, like this ```<optional language> //your code here ``` If you don’t know how to type a backtick, here are some related links : How to type a backtick on windows For mac users : On qwerty keyboards it’s the key right to the left shift (along with the " key). On azerty keyboards it’s the key over the right shift (along with the £ key). This uses highlight.js, but uses a subset of the supported langages (following code block uses java)…

public int[] getGrid() {
    CollisionResults results = new CollisionResults();
    Ray ray = new Ray(cam.getLocation(), cam.getDirection());
    shootables.collideWith(ray, results);
    if (results.size() > 0) {
        int [] cor=new int[2];
        CollisionResult closest = results.getClosestCollision();
        for (Spatial e:shootables.getChildren()) {
            if (closest.getGeometry().equals(e)) {
                loop:
                for (int i =0;i< mineField.getRow();i++) {
                    for (int j=0;j< mineField.getCol();j++) {
                        if (e.equals(temp[i][j])) {
                            cor[0]=i;
                            cor[1]=j;
                            break loop;
                        }
                    }
                }
            }
        }
        return cor;
    }  else {
        return null;
    }
}

Probably the geometry you get is the child of the shootable… so when you fail to find it in the shootables children then you should check its parent.

…or even better, just getParent() until you find the shootables and then use the previous one.

Spatial hit = null;
while( hit.getParent() != shootables ) {
   hit = hit.getParent();
}

…which is why I suggested using getParent() before.

In general, it seems like you might be pretty new to Java and your code seems to be doing everything the very hardest way possible. In the future, you may want to focus more on learning coding basics before attempting a 3D game.

As practical advice, you could remove a lot of code there by storing the row and column right on the shootable children when you create them using setUserData().