public List <BasinVertex> basinVertices; // the basin points
public WaterSeed(Terrain_holistic _T, Vector3 _position, float _flow)
{
T = _T;
flow = _flow;
Vector2 uv = T.worldToTerrainUV(_position);
Vector3 n = T.thisTerrain.terrainData.GetInterpolatedNormal(uv.x, uv.y);
source = new BasinVertex(_position, uv, n);
updateBasin();
}
private void updateBasin()
{
// Reset collection
basinVertices = new List <BasinVertex>();
// Start eroding again
erosionStrength = 1.0f;
// Add source
basinVertices.Add(source);
int safe = 300;
int step = 0;
BasinVertex prev = source;
// Gradient descent (gross sort of...)
while (step < safe)
{
Vector3 p = prev.position + 10 * prev.normal;
Vector2 puv = T.worldToTerrainUV(p);
Vector3 pn = T.thisTerrain.terrainData.GetInterpolatedNormal(puv.x, puv.y);
Vector3 pp = T.terrainUVToWorld(puv);
// Reached a local minimum?
if (pn.y > minimaLimit)
{
break;
}
BasinVertex v = new BasinVertex(pp, puv, pn);
basinVertices.Add(v);
prev = v;
step++;
}
}
public WaterSeed(Terrain_holistic _T, Vector3 _position, float _flow)
{
T = _T;
flow = _flow;
Vector2 uv = T.worldToTerrainUV(_position);
Vector3 n = T.thisTerrain.terrainData.GetInterpolatedNormal(uv.x, uv.y);
source = new BasinVertex(_position, uv, n);
updateBasin();
}
