plane mesh gen

Vector2[] uvs = new Vector2[vertices.Length];
		int[] indices = new int[(resolution - 1) * (resolution - 1) * 6];

		float spacing = size / resolution;

		for (int z = 0, i = 0; z < resolution; z++)
		{
			for (int x = 0; x < resolution; x++, i++)
			{
				vertices[i] = new Vector3(x * spacing - size / 2, 0, z * spacing - size / 2);
				uvs[i] = new Vector2((float)x / resolution, (float)z / resolution);
			}
		}

		for (int z = 0, i = 0, j = 0; z < resolution - 1; z++)
		{
			for (int x = 0; x < resolution - 1; x++, i++, j += 6)
			{
				indices[j] = i;
				indices[j + 1] = i + (resolution - 1) + 1;
				indices[j + 2] = i + 1;

				indices[j + 3] = i + 1;
				indices[j + 4] = i + (resolution - 1) + 1;
				indices[j + 5] = i + (resolution - 1) + 2;
			}
			i++;
		}

		Mesh mesh = new Mesh()
		{
			indexFormat = UnityEngine.Rendering.IndexFormat.UInt32,
			vertices = vertices,
			triangles = indices,
			uv = uvs
		};