protected override void GenerateMesh()
{
foreach(Transform child in transform)
DestroyImmediate(child.gameObject);
var rand = new MersenneTwister(randomSeed);
var totalHeight = 0.0f;
var scaleDown = 1.0f;
var combineMeshInstances = new List<CombineInstance>();
for(int i = 0; i < layerCount; ++i)
{
var baseRadius = Mathf.Lerp(baseRadiusMin, baseRadiusMax, rand.NextSinglePositive()) * scaleDown;
var baseBezier = GenerateBaseBezier(baseRadius * scaleDown, rand);
var previousTotalHeight = totalHeight;
totalHeight += Mathf.Lerp(layerHeightMin, layerHeightMax, rand.NextSinglePositive()) * scaleDown;
var heightBezier = Bezier.ConstructSmoothSpline(
new Vector3[]{
Vector3.up * previousTotalHeight,
Vector3.up * totalHeight
}
);
var heightSegs = (uint)heightSegments;
var pathSegs = (uint)(radiusSegments * scaleDown);
if( heightSegs > 0 && pathSegs > 2 )
{
var combineMeshInstance = new CombineInstance();
combineMeshInstance.mesh = Loft.GenerateMesh(
heightBezier,
baseBezier,
heightSegs,
pathSegs
);
combineMeshInstances.Add(combineMeshInstance);
var topCap = new CombineInstance();
topCap.mesh = baseBezier.Triangulate(pathSegs, Vector3.up * totalHeight);
combineMeshInstances.Add(topCap);
}
scaleDown *= Mathf.Lerp(scaleDownMin, scaleDownMax, rand.NextSinglePositive());
}
var meshFilter = GetComponent<MeshFilter>();
if( meshFilter.sharedMesh )
DestroyImmediate(meshFilter.sharedMesh);
meshFilter.sharedMesh = new Mesh();
meshFilter.sharedMesh.CombineMeshes(combineMeshInstances.ToArray(), true, false);
foreach(var combineInstance in combineMeshInstances)
DestroyImmediate(combineInstance.mesh);
}
private Bezier GenerateBaseBezier(float size, MersenneTwister rand)
{
var centerJitterX = Mathf.Lerp(-1.0f, 1.0f, size * centerJitterAmount * rand.NextSinglePositive());
var centerJitterZ = Mathf.Lerp(-1.0f, 1.0f, size * centerJitterAmount * rand.NextSinglePositive());
var centerJitter = new Vector3(centerJitterX, 0.0f, centerJitterZ);
var cpCount = 32;
var step = Mathf.PI * -2.0f / (float)cpCount;
var cps = new Vector3[cpCount];
for(int i = 0; i < cpCount; ++i)
{
var t = (float)i * step;
var x = Mathf.Sin(t) * size;
var z = Mathf.Cos(t) * size;
cps[i].x = Mathf.Lerp(0.0f, x, 1.0f - (waviness * rand.NextSinglePositive()));
cps[i].z = Mathf.Lerp(0.0f, z, 1.0f - (waviness * rand.NextSinglePositive()));
cps[i] += centerJitter;
}
return Bezier.ConstructSmoothSpline(cps, true);
}
