Runtime edge editing (just like runtime editing example for faces)

Hi,

Question one:
I'm building a probuilder runtime building editor and I need to be able to select/highlight individual edges from a probuilder object. The "Handles.cs" class has a method to select every face of an object. How can I get an Edge just like a face?

Question two:
How can I translate a selected edge at runtime? Just like its done in the sceneview. Is there something like translate(edge)?

Question three:
How can I use the insert edge loop functionality at runtime. I don't see something like that in the probuilder examples (or am I missing something?)

 

Dear @kaarrrllll ,

Thank you for your help so far! I got it working to select a single edge and to insert a edge loop at runtime. I only have a question about the PositionMoveTool script. For my understanding: The Applytranslation method gets the vertices of the selected mesh and executes a translation matrix on these vertices.

Code (CSharp):

1. void ApplyTranslation(Vector3 translation)
2.         {
3.             foreach (var key in elementSelection)
4.             {
5.                 if (!(key is MeshAndPositions))
6.                     continue;
7.  
8.                 var kvp = (MeshAndPositions)key;
9.                 var mesh = kvp.mesh;
10.                 var worldToLocal = mesh.transform.worldToLocalMatrix;
11.                 var origins = kvp.positions;
12.                 var positions = mesh.positionsInternal;
13.  
14.                 foreach (var group in kvp.elementGroups)
15.                 {
16.                     var postApplyMatrix = GetPostApplyMatrix(group);
17.                     var preApplyMatrix = postApplyMatrix.inverse;
18.  
19.                     foreach (var index in group.indices)
20.                     {
21.                             positions[index] = worldToLocal.MultiplyPoint3x4(
22.                                 postApplyMatrix.MultiplyPoint3x4(
23.                                     translation + preApplyMatrix.MultiplyPoint3x4(origins[index])));
24.                         }
25.                 }
26.  
27.                 mesh.mesh.vertices = positions;
28.                 mesh.RefreshUV(MeshSelection.selectedFacesInEditZone[mesh]);
29.                 mesh.Refresh(RefreshMask.Normals);
30.             }
31.  
32.             ProBuilderEditor.Refresh(false);
33.         }

This code above gets executed when translating the edge loop in the editor.

Code (CSharp):

1. private void SetEdgeLoopPosition(Vector3 position, Edge[] edges)
2.     {
3.         var mesh = objectSelection.mesh;
4.         var origins = mesh.positions;
5.         var worldToLocal = mesh.transform.worldToLocalMatrix;
6.         var positions = mesh.positions;
7.     }

I do have the edges of the edge loop but I do not have acces to the elementselection as far as I know.

Do I have to implement this elementSelection @ runtime or is there a smarter way of doing this?
Thank you in advance!

 

Dear @kaarrrllll ,

I have searched through the code and found the way to get my edge loop position. I can add my desired translation to this.The editor code is working with the x,y,z gizmos but I dont need any of that. I only have a static translation value that I want to apply.

I have the idea that the matrix translation calculation isnt nessesary @ runtime to translate the edge loop. Is that correct?

Code (CSharp):

1.  private void SetEdgeLoopPosition(Vector3 translation, Edge[] edges)
2.     {
3.         var mesh = objectSelection.mesh;
4.  
5.         for (int i = 0; i < edges.Length; i++)
6.         {
7.             var edgePosition = HandleUtility.GetActiveElementPosition(mesh, edges);
8.             edgePosition += translation;
9.  
10.             //apply translation
11.             mesh.positions[i] = edgePosition;
12.             //HandleUtility.SetActiveElementPosition(mesh, edges, translation);
13.         }
14.     }

Is a SetActiveElementPosition() (edge) method an option (how would I make that)?.

 

@kaarrrllll ,

Thank you, I can manipulate the vertices now. But my edge loop stays at the same position. Do you know what I need to change so I can translate the edge loop instead? This code currently does only reposition the vertices not the edge loop:

Code (CSharp):

1. private void SetEdgeLoopPosition(Vector3 translation, Edge[] edges)
2.     {
3.         var mesh = objectSelection.mesh;
4.         var verticesArray = mesh.GetVertices();
5.  
6.         foreach (var edge in edges)
7.         {
8.             var edgePosition = HandleUtility.GetActiveElementPosition(mesh, edges);
9.             edgePosition += translation;
10.  
11.             //apply translation
12.             verticesArray[edge.a].position += translation;
13.             verticesArray[edge.b].position += translation;
14.         }
15.         mesh.SetVertices(verticesArray);
16.  
17.         mesh.ToMesh();
18.         mesh.Refresh();
19.     }

 

Dear @kaarrrllll ,

Could it be that my cube is misformed at runtime because I dont use the matrix translation like the code for moving the edge loop in the scene view?

Thanks in advance!

 

Dear @kaarrrllll ,

I found out that I had to use a list of coincedent vertices instead of the list of vertices from the edge loop. That fixed my problem and it now works perfect.

Thank you for your help!