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newpolaris/ShowVertexNumber.cs

Last active April 24, 2025 09:46
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display vertex id in unity
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sample image
http://cfile27.uf.tistory.com/image/990C973360AA569332ACC0
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ShowVertexNumber.cs
// Editor script that displays the number and UV coordinates of each individual vertex making up a triangle within a mesh
// To install, place in the Assets folder of a Unity project
// Open via Window > Show Vertex Info
// Author: Luke Gane
// Last updated: 2015-02-07
using UnityEditor;
using UnityEngine;
public class ShowVertexNumber : EditorWindow {
Mesh curMesh;
MeshFilter curMeshFilter;
SkinnedMeshRenderer curSMR;
bool meshAvailable = false;
bool displayAll = true;
int curFace = 0, numFaces = 0, newFace = 0;
GUIStyle centredStyle = null;
Vector3 p1, p2, p3;
[MenuItem("Window/Show Vertex Info")]
public static void ShowWindow(){
EditorWindow.GetWindow(typeof(ShowVertexNumber)); // Show existing window instance; if one doesn't exist, it is created
}
void OnEnable(){
// See http://answers.unity3d.com/questions/58018/drawing-to-the-scene-from-an-editorwindow.html
if (SceneView.onSceneGUIDelegate != this.RenderStuff){ // This appears to be a sufficient check
SceneView.onSceneGUIDelegate += this.RenderStuff;
}
OnSelectionChange();
}
void OnDestroy(){
SceneView.onSceneGUIDelegate -= this.RenderStuff;
}
void OnSelectionChange(){
bool noMesh = true;
if (Selection.activeGameObject){
curMeshFilter = Selection.activeGameObject.GetComponentInChildren<MeshFilter>();
if (curMeshFilter){
curMesh = curMeshFilter.sharedMesh;
meshAvailable = true;
numFaces = curMesh.triangles.Length/3;
noMesh = false;
}
else{
curSMR = Selection.activeGameObject.GetComponentInChildren<SkinnedMeshRenderer>();
if (curSMR){
curMesh = curSMR.sharedMesh;
meshAvailable = true;
numFaces = curMesh.triangles.Length/3;
noMesh = false;
}
}
}
if (noMesh){
meshAvailable = false;
numFaces = 0;
}
curFace = 0;
newFace = curFace;
Repaint();
}
void OnInspectorUpdate(){
Repaint();
}
void OnGUI(){
if (meshAvailable){
EditorGUILayout.LabelField("Number of faces: ", numFaces.ToString());
EditorGUILayout.LabelField("Current face index: ", curFace.ToString());
newFace = EditorGUILayout.IntField("Jump to face index: ", curFace);
if (newFace != curFace){
if (newFace >= 0 && newFace < numFaces){
curFace = newFace;
}
}
EditorGUILayout.BeginHorizontal();
if (GUILayout.Button ("Prev Face")){
curFace = (curFace-1) % numFaces;
if (curFace < 0){
curFace = curFace + numFaces;
}
}
if (GUILayout.Button ("Next Face")){
curFace = (curFace+1) % numFaces;
}
EditorGUILayout.EndHorizontal();
EditorGUILayout.Space();
EditorGUILayout.LabelField("Index of red vertex: ", curMesh.triangles[curFace*3].ToString());
EditorGUILayout.LabelField("Index of green vertex: ", curMesh.triangles[curFace*3 + 1].ToString());
EditorGUILayout.LabelField("Index of blue vertex: ", curMesh.triangles[curFace*3 + 2].ToString());
EditorGUILayout.Space();
EditorGUILayout.LabelField("UV coords red vertex: ", "(" + curMesh.uv[curMesh.triangles[curFace*3]].x.ToString() + ", " + curMesh.uv[curMesh.triangles[curFace*3]].y.ToString() + ")");
EditorGUILayout.LabelField("UV coords green vertex: ", "(" + curMesh.uv[curMesh.triangles[curFace*3 + 1]].x.ToString() + ", " + curMesh.uv[curMesh.triangles[curFace*3 + 1]].y.ToString() + ")");
EditorGUILayout.LabelField("UV coords blue vertex: ", "(" + curMesh.uv[curMesh.triangles[curFace*3 + 2]].x.ToString() + ", " + curMesh.uv[curMesh.triangles[curFace*3 + 2]].y.ToString() + ")");
}
else{
EditorGUILayout.LabelField("Current selection contains no mesh.");
}
}
// Analogous to OnSceneGUI message handler of the Editor class
void RenderStuff(SceneView sceneView){
if (displayAll && meshAvailable) {
for (int i = 0; i < numFaces*3; i++) {
int index1 = curMesh.triangles[i];
if (curMeshFilter){
p1 = curMeshFilter.transform.TransformPoint(curMesh.vertices[index1]);
}
else if (curSMR){
p1 = curSMR.transform.TransformPoint(curMesh.vertices[index1]);
}
Handles.color = Color.clear;
Handles.DotCap(0, p1, Quaternion.identity, 0.10f*HandleUtility.GetHandleSize(p1));
if (centredStyle == null){
centredStyle = new GUIStyle(GUI.skin.label);
centredStyle.normal.textColor = Color.white;
centredStyle.fixedWidth = 10; // If you regularly inspect meshes with more than 999 vertices you may wish to increase this value
centredStyle.fixedHeight = 10;
centredStyle.alignment = TextAnchor.MiddleCenter;
// centredStyle.normal.background = Texture2D.whiteTexture; // For reference, whiteTexture is 4x4 (not particularly relevant here)
centredStyle.fontSize = 12;
centredStyle.clipping = TextClipping.Overflow;
}
Handles.Label(p1, index1.ToString(), centredStyle);
}
sceneView.Repaint();
}
else if (meshAvailable) {
int index1 = curMesh.triangles[curFace*3];
int index2 = curMesh.triangles[curFace*3 + 1];
int index3 = curMesh.triangles[curFace*3 + 2];
if (curMeshFilter){
p1 = curMeshFilter.transform.TransformPoint(curMesh.vertices[index1]);
p2 = curMeshFilter.transform.TransformPoint(curMesh.vertices[index2]);
p3 = curMeshFilter.transform.TransformPoint(curMesh.vertices[index3]);
}
else if (curSMR){
p1 = curSMR.transform.TransformPoint(curMesh.vertices[index1]);
p2 = curSMR.transform.TransformPoint(curMesh.vertices[index2]);
p3 = curSMR.transform.TransformPoint(curMesh.vertices[index3]);
}
Handles.color = Color.red;
Handles.DotCap(0, p1, Quaternion.identity, 0.25f*HandleUtility.GetHandleSize(p1));
Handles.color = Color.green;
Handles.DotCap(0, p2, Quaternion.identity, 0.25f*HandleUtility.GetHandleSize(p2));
Handles.color = Color.blue;
Handles.DotCap(0, p3, Quaternion.identity, 0.25f*HandleUtility.GetHandleSize(p3));
Handles.color = Color.white;
Handles.DrawDottedLine(p1, p2, 5f);
Handles.DrawDottedLine(p2, p3, 5f);
Handles.DrawDottedLine(p3, p1, 5f);
if (centredStyle == null){
centredStyle = new GUIStyle(GUI.skin.label);
centredStyle.normal.textColor = Color.black;
centredStyle.fixedWidth = 40; // If you regularly inspect meshes with more than 999 vertices you may wish to increase this value
centredStyle.fixedHeight = 20;
centredStyle.alignment = TextAnchor.MiddleCenter;
// centredStyle.normal.background = Texture2D.whiteTexture; // For reference, whiteTexture is 4x4 (not particularly relevant here)
centredStyle.fontSize = 12;
centredStyle.clipping = TextClipping.Overflow;
}
Handles.Label(p1, index1.ToString(), centredStyle);
Handles.Label(p2, index2.ToString(), centredStyle);
Handles.Label(p3, index3.ToString(), centredStyle);
sceneView.Repaint();
}
}
}
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