Creating Plane from script - setup indices

Questions & Answers
1

Hi there’s my code :

            void Start()
            {                

	Mesh mesh = new Mesh();

		for(int y = 0; y < 2; y++)
		{
	        Vector3[] vertices = new Vector3[4];
	        vertices[0] = new Vector3(0,0+y*ff,0); //top-left
	        vertices[1] = new Vector3(10,0+y*ff,0); //top-right
	        vertices[2] = new Vector3(0,-10+y*ff,0); //bottom-left
	        vertices[3] = new Vector3(10,-10+y*ff,0); //bottom-right

			mesh.vertices = vertices;
		}

	int[] triangles = new int[12]{0,1,2,1,3,2 ,2,3,4,3,5,4};

	mesh.triangles = triangles;
	
	Vector2[] uvs = new Vector2[4];
	uvs[0] = new Vector2(0,1); //top-left
	uvs[1] = new Vector2(1,1); //top-right
	uvs[2] = new Vector2(0,0); //bottom-left
	uvs[3] = new Vector2(1,0); //bottom-right
	
	mesh.uv = uvs;
	
	Vector3[] normals = new Vector3[4]{Vector3.forward,Vector3.forward,Vector3.forward,Vector3.forward};

	mesh.normals = normals;

	MeshFilter filter = GetComponent<MeshFilter>();

	filter.mesh = mesh;
            
            }

I’m trying draw 2 square plane but i have error with indices for the 2nd square:

 "Some indices are referencing out of bounds vertices"

Im trying many combinations with “int triangles = new int[12]{0,1,2,1,3,2 ,2,3,4,3,5,4};” but nothing works. There’s no problem with drawing one square “int triangles = new int[6]{0,1,2,1,3,2};” then one square have texture and the 2nd was invisible but have transform arrows located at the center of this square.

Please for answer

2

You have a vertices array with four indices: 0, 1, 2, and 3. The triangles array contains indices into the vertices array, so it should only contain values of 0, 1, 2, and 3. But you have values 4 and 5 in your array. In order to use these indices, you will need to increase the size of your vertices array and include values for indexes 4 and 5.