Question about Tessellation

[EricBeetsOfficial-Opuscope]

Hi there !

I not sure to understand how I can use the tessellation feature (adding points). Is there any sample about it ?

Thanks for your great job ! Eric

[NailxSharipov]

Hi!

I just updated the demo/test app at https://github.com/iShapeUnity/TriangulationDebug, and I added a Tesselletion scene with some tests.

It's much easier to see it once than to explain it.

Here's a short code snippet to understand how to work with it:

var iGeom = IntGeom.DefGeom;

var pShape = TriangulationTests.Data[index].ToPlainShape(iGeom, Allocator.Temp);

// extraPoints it's just a point inside your shape, you can think about it like a super small hole which contain just one point
var extraPoints = new NativeArray<IntVector>(0, Allocator.Temp);

// delaunay is data which represent our triangulation by default it's just simple triangulation without additional spliting

// here I also pass a parameter maxEdge, it will split any edge if it length more then this one
var delaunay = pShape.Delaunay(iGeom.Int(maxEdge), extraPoints, Allocator.Temp);

// split our triangulation more and use a rule with a max triangle are. If base triangulation contain a triangle more then this area it will be splitted
delaunay.Tessellate(iGeom, maxArea);

extraPoints.Dispose();

// get indices for mesh
var triangles = delaunay.Indices(Allocator.Temp);

// get vertices for mesh, 0 is z value
var vertices = delaunay.Vertices(Allocator.Temp, iGeom, 0);

delaunay.Dispose();

here you can see how maxArea and maxEdge affect triangulation

hope this help

[EricBeetsOfficial-Opuscope]

Thank you for your quick reply !

I thought extraPoints was the manually added points to the tessellation, it's clearer now. My next step is to run it into a Job ;)

Thanks again !

[NailxSharipov]

About running into a Job. It's super easy. Here you can take and adjust my job: https://github.com/iShapeUnity/TriangulationDebug/blob/main/Assets/Source/TriangulationJob.cs

[EricBeetsOfficial-Opuscope]

I would also need the Clipper repo, but it isn't updated on the Geometry package 0.0.5 :p

[NailxSharipov]

Clipper is not in production. It has some bugs.

Right now I am working on my second generation of this libraries;

It will be triagulation and poly bool library.

I've alredy finished them for Swift.

And ported in Rust.

https://github.com/iShape-Swift/iOverlay

After that I am going to port them in Unity too. So they will be ready soon. May be month or more

[EricBeetsOfficial-Opuscope]

oh, ok thank you for your help !!