public override void Generate(TileData data, StopToken stop)
{
if (!enabled)
{
return;
}
MatrixWorld probMatrix = data.ReadInletProduct(this);
if (factor < float.Epsilon)
{
factor = 1;
}
Noise random = new Noise(data.random, seed);
float square = data.area.active.worldSize.x * data.area.active.worldSize.z; //note using the real size, density should not depend on margins
float count = square * (density / 1000000); //number of items per terrain
PosTab posTab = new PosTab((Vector3)data.area.full.worldPos, (Vector3)data.area.full.worldSize * factor, 16);
RandomScatter((int)count, uniformity, (Vector3)data.area.full.worldPos, (Vector3)data.area.full.worldSize * factor, posTab, random, probMatrix, stop: null);
TransitionsList transitions = posTab.ToTransitionsList();
data.StoreProduct(this, transitions);
}
public static void RandomScatter(int count, float uniformity, Vector3 offset, Vector3 size, PosTab posTab, Noise rnd, MatrixWorld prob, StopToken stop = null)
{
//int candidatesNum = (int)(uniformity*100);
int candidatesNum = 100;
if (candidatesNum < 1)
{
candidatesNum = 1;
}
for (int i = 0; i < count; i++)
{
if (stop != null && stop.stop)
{
return;
}
float bestCandidateX = 0;
float bestCandidateZ = 0;
float bestDist = 0;
for (int c = 0; c < candidatesNum; c++)
{
float candidateX = (offset.x + 1) + (rnd.Random((int)posTab.pos.x, (int)posTab.pos.z, i * candidatesNum + c, 0) * (size.x - 2.01f)); //TODO: do not use pos since it changes between preview/full
float candidateZ = (offset.z + 1) + (rnd.Random((int)posTab.pos.x, (int)posTab.pos.z, i * candidatesNum + c, 1) * (size.z - 2.01f));
//checking if candidate is the furthest one
Transition closest = posTab.Closest(candidateX, candidateZ, minDist: 0.001f);
float dist = (closest.pos.x - candidateX) * (closest.pos.x - candidateX) + (closest.pos.z - candidateZ) * (closest.pos.z - candidateZ);
//distance to the edge
float bd = (candidateX - offset.x) * 2; if (bd * bd < dist)
{
dist = bd * bd;
}
bd = (candidateZ - offset.z) * 2; if (bd * bd < dist)
{
dist = bd * bd;
}
bd = (offset.x + size.x - candidateX) * 2; if (bd * bd < dist)
{
dist = bd * bd;
}
bd = (offset.z + size.z - candidateZ) * 2; if (bd * bd < dist)
{
dist = bd * bd;
}
//probability
if (prob != null)
{
float probValue = prob.GetWorldInterpolatedValue(candidateX, candidateZ);
dist *= probValue;
}
if (dist > bestDist)
{
bestDist = dist; bestCandidateX = candidateX; bestCandidateZ = candidateZ;
}
}
if (bestDist > 0.001f) //adding only if some suitable candidate found
{
Transition trs = new Transition(bestCandidateX, bestCandidateZ);
posTab.Add(trs);
}
}
posTab.Flush();
}
