private void InitFromSelection()
{
GameObject selected = null;
foreach (GameObject o in Selection.SelectedObjects)
{
selected = o;
break;
}
if (null != selected)
{
GrassController controller = selected.GetComponent <GrassController>();
if (null != controller)
{
grass = controller;
// DEBUG - rebuild debug arrays and mesh from controller
grass.RebuildDebugMesh();
// switch ON the record button
uiActiveButton.Checked = true;
return;
}
}
grass = null;
}
private void Add(float pressure)
{
if (grass == null)
{
return;
}
// DEBUG
//line.positionCount = 2 * density;
// place based on density
for (int k = 0; k < density; k++)
{
float worldBrushSize = brushSize * GlobalState.WorldScale;
// Random on the brush disc
Vector2 delta = worldBrushSize * Random.insideUnitCircle;
// Create rays in a circle around the firstRay, in controller space.
Ray ray = firstRay;
Vector3 rayOriginDelta = Vector3.zero;
if (k != 0) // except for the first point, at the center of the circle).
{
rayOriginDelta.x = delta.x;
rayOriginDelta.y = delta.y;
ray.origin =
toolControllerXf.TransformPoint(
toolControllerXf.InverseTransformPoint(firstRay.origin) + rayOriginDelta);
}
//line.SetPosition(2 * k + 0, ray.origin);
//line.SetPosition(2 * k + 1, ray.origin + ray.direction);
// if the ray hits something thats on the layer mask,
// within the grass limit and within the y normal limit
RaycastHit hit;
if (Physics.Raycast(ray, out hit, 200f, hitMask.value) &&
currentGrassAmount < grassLimit &&
hit.normal.y >= (2.0f * normalLimit - 1.0f))
{
if ((paintMask.value & (1 << hit.transform.gameObject.layer)) > 0)
{
Vector3 hitPos = hit.point;
Vector3 hitNormal = hit.normal;
if (k != 0 || (Vector3.Distance(hit.point, lastPosition) > brushSize))
{
Vector3 newGrassPosition = grass.transform.InverseTransformPoint(hitPos); // to Local mesh position
Vector3 newGrassNormal = grass.transform.InverseTransformDirection(hit.normal);
Vector2 newGrassUV = new Vector2(widthMultiplier, heightMultiplier);
Color newGrassColor = adjustedColor;
// ADD POINT to the controller.
grass.AddPoint(newGrassPosition, newGrassNormal, newGrassUV, newGrassColor); // TODO: do not rebuild for each vertex. Add, then rebuild once.
currentGrassAmount++;
if (rayOriginDelta == Vector3.zero)
{
lastPosition = hitPos;
}
}
}
}
}
grass.RebuildDebugMesh();
}