public static GameObject CreateCollider(this Link.Geometry.Sphere sphere, GameObject parent)
{
GameObject gameObject = new GameObject("Sphere");
gameObject.transform.SetParentAndAlign(parent.transform);
SphereCollider sphereCollider = gameObject.AddComponent <SphereCollider>();
sphereCollider.radius = (float)sphere.radius;
return(gameObject);
}
public static GameObject CreateVisual(this Link.Geometry.Sphere sphere, GameObject parent)
{
GameObject gameObject = new GameObject("Sphere");
gameObject.transform.SetParentAndAlign(parent.transform);
MeshFilter meshFilter = gameObject.AddComponent <MeshFilter>();
meshFilter.mesh = sphere.getMesh();
gameObject.AddComponent <MeshRenderer>();
return(gameObject);
}
private static Mesh getMesh(this Link.Geometry.Sphere sphere)
{
float radius = (float)sphere.radius;
int nbLong = 30;
int nbLat = 30;
#region Vertices
Vector3[] vertices = new Vector3[(nbLong + 1) * nbLat + 2];
float _pi = Mathf.PI;
float _2pi = _pi * 2f;
vertices[0] = Vector3.up * radius;
for (int lat = 0; lat < nbLat; lat++)
{
float a1 = _pi * (float)(lat + 1) / (nbLat + 1);
float sin1 = Mathf.Sin(a1);
float cos1 = Mathf.Cos(a1);
for (int lon = 0; lon <= nbLong; lon++)
{
float a2 = _2pi * (float)(lon == nbLong ? 0 : lon) / nbLong;
float sin2 = Mathf.Sin(a2);
float cos2 = Mathf.Cos(a2);
vertices[lon + lat * (nbLong + 1) + 1] = new Vector3(sin1 * cos2, cos1, sin1 * sin2) * radius;
}
}
vertices[vertices.Length - 1] = Vector3.up * -radius;
#endregion
#region Normales
Vector3[] normales = new Vector3[vertices.Length];
for (int n = 0; n < vertices.Length; n++)
{
normales[n] = vertices[n].normalized;
}
#endregion
#region UVs
Vector2[] uvs = new Vector2[vertices.Length];
uvs[0] = Vector2.up;
uvs[uvs.Length - 1] = Vector2.zero;
for (int lat = 0; lat < nbLat; lat++)
{
for (int lon = 0; lon <= nbLong; lon++)
{
uvs[lon + lat * (nbLong + 1) + 1] = new Vector2((float)lon / nbLong, 1f - (float)(lat + 1) / (nbLat + 1));
}
}
#endregion
#region Triangles
int nbFaces = vertices.Length;
int nbTriangles = nbFaces * 2;
int nbIndexes = nbTriangles * 3;
int[] triangles = new int[nbIndexes];
//Top Cap
int i = 0;
for (int lon = 0; lon < nbLong; lon++)
{
triangles[i++] = lon + 2;
triangles[i++] = lon + 1;
triangles[i++] = 0;
}
//Middle
for (int lat = 0; lat < nbLat - 1; lat++)
{
for (int lon = 0; lon < nbLong; lon++)
{
int current = lon + lat * (nbLong + 1) + 1;
int next = current + nbLong + 1;
triangles[i++] = current;
triangles[i++] = current + 1;
triangles[i++] = next + 1;
triangles[i++] = current;
triangles[i++] = next + 1;
triangles[i++] = next;
}
}
//Bottom Cap
for (int lon = 0; lon < nbLong; lon++)
{
triangles[i++] = vertices.Length - 1;
triangles[i++] = vertices.Length - (lon + 2) - 1;
triangles[i++] = vertices.Length - (lon + 1) - 1;
}
#endregion
Mesh mesh = new Mesh();
mesh.vertices = vertices;
mesh.normals = normales;
mesh.uv = uvs;
mesh.triangles = triangles;
mesh.RecalculateBounds();
return(mesh);
}
