koobas.hobune.stream
Lighting issues with script-generated polygons
I have several shapes made of four vertices each generated using code.
The shapes are correct, but their lighting comes out looking very strange.
Here's an example: https://imgur.com/a/Y3eUURG
I think it has something to do with normals, but I'm quite new to generating meshes. Any ideas?
This is the code I use to generate the map:
public GameObject CreatePlaneFromPoints (Vector3[] points, Material material)
{
Vector3 center = centerFromPoints(points) * playerHeightScaleFactor;
GameObject newObj = new GameObject();
newObj.transform.position = center;
MeshFilter mF = newObj.AddComponent<MeshFilter>();
MeshRenderer mR = newObj.AddComponent<MeshRenderer>();
mR.material = material;
Mesh msh = new Mesh();
msh.vertices = pointsRelativeTo(points, center);
msh.triangles = new int[6] { 0, 1, 2, 2, 3, 0 };
msh.RecalculateNormals();
msh.uv = new Vector2[4]
{
new Vector2(0, 0),
new Vector2(0, 1),
new Vector2(1, 1),
new Vector2(1, 0)
};
mF.mesh = msh;
// Collider
newObj.AddComponent<MeshCollider>().sharedMesh = msh;
return newObj;
}
private Vector3[] pointsRelativeTo(Vector3[] points, Vector3 relativeTo)
{
for (int i = 0; i < points.Length; i++)
{
points[i] = points[i] - relativeTo;
}
return points;
}
private Vector3 centerFromPoints(Vector3[] points)
{
int uC = -1000;
Vector3 lowest = new Vector3(uC, uC, uC);
Vector3 highest = new Vector3(uC, uC, uC);
foreach (Vector3 p in points)
{
if (lowest.x == uC || p.x < lowest.x) lowest.x = p.x;
if (lowest.y == uC || p.y < lowest.y) lowest.y = p.y;
if (lowest.z == uC || p.z < lowest.z) lowest.z = p.z;
if (highest.x == uC || p.x > highest.x) highest.x = p.x;
if (highest.y == uC || p.y > highest.y) highest.y = p.y;
if (highest.z == uC || p.z > highest.z) highest.z = p.z;
}
Vector3 diff = highest - lowest;
return lowest + (diff / 2);
}
This might help you: http://schemingdeveloper.com/2014/10/17/better-method-recalculate-normals-unity/ you have to make sure, that the normals are smoothed to their position in average on your surface generation. I guess, right now your normals are in tangent to their individual polygon.
