Size of the platform

Help & Support
1

Hi,
I’m attempting to dynamically create a platform with infinite movement. I’ve been following the Infinity Runner Tutorial, and you can find the project here. The project is functioning as intended.

While going through the code, I noticed a part where the platform is removed when it reaches a certain point, and then it’s added to the start again using the following line:

x = this.parent.children[this.childCount - 1].getLocalPosition().x + 2;

Instead of adding a fixed value of 2 to the code, I’d like to add it to the size of the entity so that I can use the same code for a much wider platform.

Note: The model of platforms cannot be accessed using this.entity.model;

Thank you.

2

Hi @Kaverappa and welcome!

It sounds like you want to replace the fixed 2 with something like below.

platformEntity.getLocalScale().x

Not sure what you exactly mean with this.

3 
platformEntity.getLocalScale().x

This actually shows the scale not the size, scale of different entity can be 1 but their size changes.

I have seen few post in forum where they use bounding box as in Calculate bounding box in a model.

4

This is not working for you?

5

No. this.entity.model is undefined

6

Maybe you use the new render component on your entities? If that’s the case you need to replace model with render in the script.

7

How do I use this to replace 2 in x = this.parent.children[this.childCount - 1].getLocalPosition().x + 2;?

8

If you could show me how to utilize that code for figuring out the entity’s size, that would be awesome.

9

When you have a bounding box, I expect it should be something like aabb.halfExtents.x.

1 Like
10

If you take a look at the project, you’ll notice that I’ve attached a script to the ground entity, which serves as the template. The code I use to obtain its size is as follows:

var meshInstances = this.entity.children[0].render.meshInstances;
if (meshInstances.length > 0) {
    var bbox = new pc.BoundingBox();
    bbox.copy(meshInstances[0].aabb);
    for (var i = 1; i < meshInstances.length; i++) {
        bbox.add(meshInstances[i].aabb);
    }
    this.size = bbox.halfExtents.x;
}

This approach may vary if the platform structure is different, such as when the render component is in the 2nd child or parent component. Is there a way to address this variation? Can I directly retrieve the size of the template?

11

A quick search on the forum brings me to the topic below.

I think this topic is very useful.

12

Thank you. I’ll give it a try.