Partial destruction

[mhoangvslev]

This idea may sound improbable: destruction weight painting.
You can precise the parts where you want the terrain to be destructible by simply paint on desired vertices.
Also the amount of destruction will be defined by the weight assigned to the vertex groups.

[Phyronnaz]

Already doable. I'm going to create a wiki page to explain how to do it.

Edit: With the wiki you should be able to do it

[mhoangvslev]

@Phyronnaz I believe that you are referring to this page. I don't see where you define destructibility of a given zone. If it is not the case, could you make more extensive documenting?

[Phyronnaz]

There are 2 ways of doing it:

• Setting the values of the voxels to something higher than 1. This is quite easy to do, however it won't look great as it would deform the terrain
• Setting a material to the voxels and creating a custom edit tool that checks whether the edited voxel contains this material (each voxel has 2 material blended by an alpha value). If it does, the edit strength is decreased.

To create this tool, I suggest you to copy/paste the SetValueProjection function, and replace this (and the similar call below) by this:

float CurrentStrength = Stength;
if (World->GetMaterial(Point).GetMax() /*Get the most visible material*/ == 255 /*Index of the material*/)
{
	CurrentStrength /= 10;
}
World->SetValue(Point, FMath::Clamp(World->GetValue(Point) - CurrentStrength, MinValue, MaxValue));

(not tested)