Wireframe script

Unity Engine
1

Would anyone here know how to modify this script so it only draws the quads in an object and not the tris?

// attach to an object with a mesh filter 

var lineColor : Color; 
var backgroundColor : Color; 
var ZWrite = true; 
var AWrite = true; 
var blend = true; 

private var lines : Vector3[]; 
private var linesArray : Array; 
private var lineMaterial : Material; 
private var meshRenderer : MeshRenderer; 

function Start () 
{ 
   meshRenderer = GetComponent(MeshRenderer); 
   if(!meshRenderer) meshRenderer = gameObject.AddComponent(MeshRenderer); 
   meshRenderer.material = new Material("Shader \"Lines/Background\" { Properties { _Color (\"Main Color\", Color) = (1,1,1,1) } SubShader { Pass {" + (ZWrite ? " ZWrite on " : " ZWrite off ") + (blend ? " Blend SrcAlpha OneMinusSrcAlpha" : " ") + (AWrite ? " Colormask RGBA " : " ") + "Lighting Off Offset 1, 1 Color[_Color] }}}"); 
    
  // lineMaterial = new Material("Shader \"Lines/Colored Blended\" { SubShader { Pass { Blend SrcAlpha OneMinusSrcAlpha ZWrite Off Cull Front Fog { Mode Off } } } }"); 
    
   //lineMaterial.hideFlags = HideFlags.HideAndDontSave; 
   //lineMaterial.shader.hideFlags = HideFlags.HideAndDontSave; 
    
   linesArray = new Array(); 
   var filter : MeshFilter = GetComponent(MeshFilter); 
   var mesh = filter.mesh; 
   var vertices = mesh.vertices; 
   var triangles = mesh.triangles; 
    
   for (i = 0; i < triangles.length / 3; i++) 
   { 
      linesArray.Add(vertices[triangles[i * 3]]); 
      linesArray.Add(vertices[triangles[i * 3 + 1]]); 
      linesArray.Add(vertices[triangles[i * 3 + 2]]); 
   } 
    
   lines = linesArray.ToBuiltin(Vector3); 
} 


function OnRenderObject() 
{    
   meshRenderer.material.color = backgroundColor; 
   //lineMaterial.SetPass(0); 
    
   GL.PushMatrix(); 
   GL.MultMatrix(transform.localToWorldMatrix);
   GL.Begin(GL.LINES); 
   GL.Color(lineColor); 
    
   for (i = 0; i < lines.length / 3; i++) 
   { 
      GL.Vertex(lines[i * 3]); 
      GL.Vertex(lines[i * 3 + 1]); 
       
      GL.Vertex(lines[i * 3 + 1]); 
      GL.Vertex(lines[i * 3 + 2]); 
       
      GL.Vertex(lines[i * 3 + 2]); 
      GL.Vertex(lines[i * 3]); 
   } 
          
   GL.End(); 
   GL.PopMatrix(); 
}
2

I’m afraid that’s not trivial…you’d have to write some kind of routine to figure out which triangles can be converted to quads and then construct a new array from that. Quad data isn’t something that’s stored anywhere, except in the original file, which isn’t available to your app.

–Eric