/// <summary>
/// Add prefabs, mode Poisson
/// </summary>
public void AddPrefabs_Poisson_Any(Vector3 position, Vector3 normal)
{
GameObject container = editorTarget.container as GameObject;
float brushSize = editorTarget.brushSettings.brushSize;
float brushRadius = brushSize / 2.0f;
float discRadius = editorTarget.brushSettings.poissonDiscSize / 2;
PoissonDiscSampler sampler = new PoissonDiscSampler(brushSize, brushSize, discRadius);
foreach (Vector2 sample in sampler.Samples())
{
// brush is currenlty a disc => ensure the samples are within the disc
if (Vector2.Distance(sample, new Vector2(brushRadius, brushRadius)) > brushRadius)
{
continue;
}
// x/z come from the poisson sample
float x = position.x + sample.x - brushRadius;
float z = position.z + sample.y - brushRadius;
float y = position.y + editorTarget.brushSettings.poissonDiscRaycastOffset;
Vector3 currentPosition = new Vector3(x, y, z);
// TODO: raycast hit against layer
// see https://docs.unity3d.com/ScriptReference/Physics.Raycast.html
if (Physics.Raycast(currentPosition, Vector3.down, out RaycastHit raycastHitDown, Mathf.Infinity))
{
y = raycastHitDown.point.y;
}
/// <summary>
/// Get the list of samples.
/// The samples are re-used unless forceNew is true. This is usually after the current sample set has been used for painting.
/// Otherwise the sample set will be used for drawing the gizmo
/// </summary>
/// <param name="brushSize"></param>
/// <param name="brushRadius"></param>
/// <param name="discRadius"></param>
/// <param name="forceNew"></param>
/// <returns></returns>
public IEnumerable <Vector2> Samples(float brushSize, float brushRadius, float discRadius, bool forceNewDistribution)
{
if (discRadius < MIN_DISC_SIZE)
{
Debug.LogError("Poisson Disc Size is too small. Setting it to " + MIN_DISC_SIZE);
discRadius = MIN_DISC_SIZE;
}
bool createNewList = forceNewDistribution || sampler == null || sampleParameters.HasChanged(brushSize, brushRadius, discRadius);
if (createNewList)
{
sampler = new PoissonDiscSampler(brushSize, brushSize, discRadius);
samplesList = CreateSamplesList(brushSize, brushSize, discRadius);
}
// store parameters for reuse of the list
sampleParameters = new SampleParameters(brushSize, brushRadius, discRadius);
return(samplesList);
}