public static MeshDraft GenerateGabled(List <Vector2> roofPolygon, RoofConfig roofConfig)
{
Vector3 a = roofPolygon[0].ToVector3XZ() + Vector3.up * roofConfig.thickness;
Vector3 b = roofPolygon[3].ToVector3XZ() + Vector3.up * roofConfig.thickness;
Vector3 c = roofPolygon[2].ToVector3XZ() + Vector3.up * roofConfig.thickness;
Vector3 d = roofPolygon[1].ToVector3XZ() + Vector3.up * roofConfig.thickness;
Vector3 ridgeHeight = Vector3.up * GabledRoofHeight;
Vector3 ridge0 = (a + d) / 2 + ridgeHeight;
Vector3 ridge1 = (b + c) / 2 + ridgeHeight;
var roofDraft = new MeshDraft();
roofDraft.AddQuad(a, ridge0, ridge1, b);
roofDraft.AddTriangle(b, ridge1, c);
roofDraft.AddQuad(c, ridge1, ridge0, d);
roofDraft.AddTriangle(d, ridge0, a);
return(roofDraft);
}
private void AddBottomLeftTriangle(int x, int y)
{
Vector2 bottomLeft = GetBottomLeftPosition(x, y);
if (contours.useInterpolation)
{
draft.AddTriangle(
bottomLeft,
bottomLeft + Vector2.up * contours.GetLeftSide(x, y) * squareSize,
bottomLeft + Vector2.right * contours.GetBottomSide(x, y) * squareSize,
normal);
}
else
{
draft.AddTriangle(
bottomLeft,
bottomLeft + Vector2.up * cornerWeight * squareSize,
bottomLeft + Vector2.right * cornerWeight * squareSize,
normal);
}
}
void Start()
{
if (baseMesh == null)
{
baseMesh = GetComponent <MeshFilter>().sharedMesh;
}
#if UNITY_EDITOR
var cam = Camera.current;
if (cam == null || Application.isPlaying)
{
cam = Camera.main;
}
#else
var cam = Camera.main;
#endif
var draft = new MeshDraft();
var rand = new System.Random(0);
// expend the number of triangles
var triangles = baseMesh.Triangles();
var dist = Vector3.Distance(cam.transform.position, transform.position);
var lod = (1f - ((Mathf.Clamp(dist, minDist, maxDist)) - minDist) / (maxDist - minDist));
var numSplits = lod * maxSplits;
var height = lod * maxHeight;
#if DEBUG
Debug.Log(dist + " : " + numSplits);
#endif
for (int i = 0; i < numSplits; i++)
{
var tmpTriangles = new List <(Vector3 a, Vector3 b, Vector3 c)>();
foreach (var tri in triangles)
{
var(middle, oposite, first, second) = tri.MiddleLargestSide();
tmpTriangles.Add((oposite, first, middle));
tmpTriangles.Add((oposite, middle, second));
}
triangles = tmpTriangles.ToArray();
}
foreach (var tri in triangles)
{
var middle = tri.Middle(((float)rand.NextDouble(), (float)rand.NextDouble(), (float)rand.NextDouble()));
var normal = tri.Normal();
var sideDir = (tri.Item1 - middle).normalized;
var leanDir = MeshExension.Normal(sideDir, normal);
var rot = Quaternion.RotateTowards(Quaternion.LookRotation(sideDir, normal), Quaternion.LookRotation(sideDir, normal), (float)rand.NextDouble());
sideDir = rot * sideDir;
leanDir = rot * leanDir;
var a = middle + sideDir * (maxWidth + ((float)rand.NextDouble() - 0.5f) * randWidth);
var b = middle - sideDir * (maxWidth + ((float)rand.NextDouble() - 0.5f) * randWidth);
var c = middle + (normal + leanDir * (leanDist + ((float)rand.NextDouble() - 0.5f) * randLeanDist)).normalized * (maxHeight + ((float)rand.NextDouble() - 0.5f) * randHeight);
//normal = MeshExension.Normal(a, b, c);
//if (Vector3.Dot(normal, cam.transform.forward) < 0)
// normal = -normal;
//normal = -Camera.main.transform.forward;
//normal = (Camera.main.transform.position - middle).normalized;
draft.AddTriangle(a, b, c, -leanDir, -leanDir, normal);
}
Grass = draft.ToMesh();
}
