Randomize Sphere & Smooth Vertex ( like in blender)

Questions & Answers
1

I’m looking to take a sphere mesh and randomize the height as well as smooth the vertex just like i’m able to do in blender (only I want to do this in C# within unity)

In blender when I have a sphere selected and click randomize, I am able to see different height and depth added to the sphere and there are no holes or problems.

My code:

Mesh mesh = GetComponent<MeshFilter>().mesh;
Vector3[] vertices = mesh.vertices;
float [][] verticesArray;// = new float [vertices.Length][3];
verticesArray = new float [vertices.Length][];
	
	int vertexCount = mesh.vertexCount;

	int j = 0;
	while (j < vertices.Length)
	{
		verticesArray[j] = new float [3];
		
	

		Vector3 vUp = Vector3.MoveTowards(vertices[j],Vector3.zero, .05f);

		vertices[j] = vUp * Random.Range(0.9f, 1.1f);

		
		j++;
	}

I’m trying to have the vertices move upwards (opposite of the direction towards the center) with some variation - but the sphere has a lot of gaps and is not smooth.

Please help !

Here is what is happening in Unity…

41631-unity.jpg
41631-unity.jpg606×502 57 KB

Here is what I’m trying to do in unity (the picture is while using blender)

41586-planet.jpg
41586-planet.jpg997×739 46.3 KB

2

It seems like you have multiple vertices in certain locations which is why the mesh appears to be tearing.

You can either

  1. Group together vertices that are in the same location and set all their new locations to the same position.
  2. Use perlin noise to generate the same value for vertices in the same location. It I had to take a guess, blender probably uses perlin noise for the picture you provided.
  3. Have only one vertex per position. However this would make flat shading difficult since vertices would be on multiple faces and can only have one normal.