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Create a sphere, as a grid of points regularly spaced in latitude and longitude
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class LatLonSphere : MonoBehaviour
{
public int latRes=20, lonRes=40;
void Start()
{
Vector3[] myVerts = new Vector3[latRes*lonRes];
Vector2[] myUV = new Vector2[latRes*lonRes];
int index=0;
for (int j=0; j < latRes; j++)
{
for (int i=0; i < lonRes; i++)
{
float lat = (j*Mathf.PI)/(latRes-1) - Mathf.PI/2;
float lon = (i*Mathf.PI*2)/(lonRes-1) - Mathf.PI;
myVerts[index] = new Vector3(Mathf.Cos(lat)*Mathf.Sin(lon), Mathf.Sin(lat), -Mathf.Cos(lat)*Mathf.Cos(lon));
myUV[index] = new Vector2(i/(lonRes-1.0f), j/(latRes-1.0f));
index++;
}
}
int[] myTris = new int[(latRes-1)*(lonRes-1)*2*3];
index=0;
for (int j=0; j < latRes-1; j++)
{
for (int i=0; i < lonRes-1; i++)
{
int corner = i + j*lonRes;
myTris[index++] = corner;
myTris[index++] = corner+lonRes;
myTris[index++] = corner+1;
myTris[index++] = corner+lonRes;
myTris[index++] = corner+lonRes+1;
myTris[index++] = corner+1;
}
}
Mesh myMesh = gameObject.GetComponent<MeshFilter>().mesh;
myMesh.Clear();
myMesh.vertices = myVerts;
myMesh.uv = myUV;
myMesh.triangles = myTris;
myMesh.normals = myVerts;
}
}
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