public static void Conify(TerraMesh _tMesh, float _strength, Progress.OnUpdate _onUpdate = null)
{
if (_onUpdate == null)
{
_onUpdate = (_prog, _str) => { }
}
;
var prog = new Progress();
prog.SetOnUpdate(_onUpdate);
var cent = _tMesh.m_Bounds.center.ToVec2();
var min = _tMesh.m_Bounds.min.ToVec2();
var maxMag = (min - cent).magnitude;
prog.Update(0, "Conifying");
for (var sIdx = 0; sIdx < _tMesh.Vertices.Length; ++sIdx)
{
var sitePos = _tMesh.Vertices[sIdx];
var magScal = (new Vector2(sitePos.x, sitePos.y) - cent).magnitude / maxMag - 0.5f;
var zShift = magScal * _strength / 2f;
var newPos = new Vector3(sitePos.x, sitePos.y, zShift + sitePos.z);
_tMesh.Vertices[sIdx] = newPos;
prog.Update((float)sIdx / _tMesh.Vertices.Length);
}
_tMesh.RecalculateBounds();
}
public static void Erode(TerraMesh _tMesh, float _maxErosionRate, float[] _waterFlux)
{
var sitePositions = _tMesh.GetAllSitePositions(); //TODO SLOW
//Get all site slope vectors and slope values
var slopeVecs = new Vector3[sitePositions.Length];
var slopeVals = new float[sitePositions.Length];
for (var pIdx = 0; pIdx < sitePositions.Length; ++pIdx)
{
var p = sitePositions[pIdx];
var aveSlp = Vector3.zero;
var nbrCnt = 0;
foreach (var nIdx in _tMesh.SiteNeighbors[pIdx])
{
if (nIdx == SiteIdxNull)
{
continue;
}
nbrCnt++;
var n = sitePositions[nIdx];
var slpVec = n - p;
if (slpVec.z > 0)
{
slpVec = -slpVec;
}
aveSlp += slpVec;
}
var slpVecCell = aveSlp / nbrCnt;
slopeVecs[pIdx] = slpVecCell;
slopeVals[pIdx] = slpVecCell.z / new Vector2(slpVecCell.x, slpVecCell.y).magnitude;
}
//Apply erosion to terra mesh surface
for (var pIdx = 0; pIdx < _waterFlux.Length; ++pIdx)
{
var sitePos = sitePositions[pIdx];
var fx = (float)Math.Sqrt(_waterFlux[pIdx]);
var slp = slopeVals[pIdx];
var erosionShift = Math.Min(-slp * fx, _maxErosionRate);
//var newPos = new Vector3(sitePos.x, sitePos.y, sitePos.z - erosionShift);
SetSiteHeight(_tMesh, pIdx, sitePos.z - erosionShift);
}
_tMesh.RecalculateBounds();
}
public static void Blob(TerraMesh _tMesh, float _strength, float _radius, Vector2 _loc)
{
for (var sIdx = 0; sIdx < _tMesh.Vertices.Length; ++sIdx)
{
var sPos = _tMesh.Vertices[sIdx];
var vert2d = sPos.ToVec2();
var dist = (vert2d - _loc).magnitude;
if (dist > _radius)
{
continue;
}
var cosVal = dist / _radius * (float)Math.PI / 2f;
var zShift = _strength * (float)Math.Cos(cosVal);
var newZ = sPos.z + zShift;
var newPos = new Vector3(vert2d.x, vert2d.y, sPos.z + zShift);
_tMesh.Vertices[sIdx] = newPos;
}
_tMesh.RecalculateBounds();
}
public static void SlopeGlobal(TerraMesh _tMesh, Vector2 _dir, float _strength,
Progress.OnUpdate _onUpdate = null)
{
if (_onUpdate == null)
{
_onUpdate = (_prog, _str) => { }
}
;
var prog = new Progress();
prog.SetOnUpdate(_onUpdate);
var dir = _dir.normalized;
var bnds = _tMesh.bounds;
Func <Vector3, float> strf = _pos =>
{
var xPct = (_pos.x - bnds.min.x) / bnds.size.x - 0.5f;
var yPct = (_pos.y - bnds.min.y) / bnds.size.y - 0.5f;
var xStr = xPct * dir.x;
var yStr = yPct * dir.y;
return((xStr + yStr) * _strength / 4f);
};
prog.Update(0, "Global Slope");
for (var sIdx = 0; sIdx < _tMesh.Vertices.Length; ++sIdx)
{
//if (_tMesh.HullSites.Contains(sIdx))
// Trace.WriteLine("Debug Hullsites"); //TODO DEbug
var sitePos = _tMesh.Vertices[sIdx];
var zShift = strf(sitePos);
var newZ = sitePos.z + zShift;
var newPos = new Vector3(sitePos.x, sitePos.y, newZ);
_tMesh.Vertices[sIdx] = newPos;
prog.Update((float)sIdx / _tMesh.Vertices.Length);
}
_tMesh.RecalculateBounds();
}
