How can I use cutting plane？

[sheng_zhong]

Is there any way to implement cutting plane? I have no idea at the moment

[Leonidas]

Hi @sheng_zhong,

Can you elaborate on what you mean exactly?

Like cutting a building model in construction plans? Or something else?

[sheng_zhong]

look like this.
http://www.tuituisoft.com/blog/4185.html

[sheng_zhong]

Also wondering if there is a way to measure the distance between Model 2 points, which I didn’t find in the tutorial

[Leonidas]

@sheng_zhong

look like this.
http://www.tuituisoft.com/blog/4185.html

So, I haven’t seen an example like that in PlayCanvas, I imagine you could do that in a number of ways:

1. Using a custom shader to discard and pixel rendered above the cutting plane in world space.

2. Create a new mesh where you discard any vertex points above the cutting plane.

3. Use a custom camera projection method to set the far plane to the cutting plane (this may not be doable depending on the camera position/rotation).

All solutions aren’t trivial to implement.

[mvaligursky]

There’s this example which implements a single cutting plane

Clipping planes in PlayCanvas

Hi @Gradess, No, there isn’t an API to do that automatically for a given material. It’s doable with custom shaders, if you are comfortable with shaders. Mainly it requires calculating the distance of the world pos of each pixel from a given plane and discarding it, if the distance is negative.