Color triangle on mesh

Questions & Answers
1

Hi, I’m trying to vertex color every triangle on mesh with random color, but I’m getting this:

[31148-wrong.jpg*_|31148]

but I’m want to get this:

[31149-correct.jpg*_|31149]

The red triangle is always one-colored and other ones on mesh aren’t.

using UnityEngine;
using System.Collections;

public void VertsColor(GameObject gameObject)
{
	Mesh mesh = gameObject.GetComponent<MeshFilter>().mesh;

	int[] triangles = mesh.triangles;
	Vector3[] vertices = mesh.vertices;

	Vector3[] verticesModified = new Vector3[triangles.Length];
	int[] trianglesModified = new int[triangles.Length];

	Color32 currentColor = new Color32();
	Color32[] colors = new Color32[triangles.Length];

	for (int i = 0; i < trianglesModified.Length; i++) {

		// Makes every vertex unique
		verticesModified _= vertices[triangles*];*_

_ trianglesModified = i;
* // Every third vertex randomly chooses new color*
colors[triangles*] = currentColor;
if(triangles % 3 == 0)
currentColor = new Color(
Random.Range (0.0f, 1.0f),
Random.Range (0.0f, 1.0f),
Random.Range (0.0f, 1.0f),
1.0f);
}
// Applyes changes to mesh*
* mesh.vertices = verticesModified;
mesh.triangles = trianglesModified;
mesh.colors32 = colors;
}
Thanks for your help!

_*

2

Hi, I think you have to index with “i” in lines 24 and 25 instead of “triangle*” (there “i” is your new vertex + triangle + colors index)*
Line24: colors = currentColor;
Line25: if( i % 3 == 0 )

3

Seems way to specific a Q to be here, but:

In the “every 3rd vert change color,” isn’t triangles just a randomish number? Try a Debug to see when you change colors.
Shouldn’t it be simply if(i%3==0)? And assign the color afterwards? i.e.: tri indexes 3,4,5 form a tri, so you pick a color for 3, use it for 3,4,5; then pick a new color just before assigning 6,7,8.

4

This Brackeys video may help.