private Vector3?GetHitPoint(Vector2 currentPosition)
{
// Conver the mouse position into a ray to intersect with a plane in the world
Ray currentRay = Camera.current.ScreenPointToRay(EditorHelper.ConvertMousePointPosition(currentPosition));
// Find the currently active plane
Plane plane = GetActivePlane();
// If we hit the plane, return the hit point, otherwise return null
float distance;
if (plane.Raycast(currentRay, out distance))
{
Vector3 hitPoint = currentRay.GetPoint(distance);
if (CurrentSettings.PositionSnappingEnabled)
{
Polygon activePolygon = GetActivePolygon();
if (activePolygon != null)
{
// Rotation to go from the polygon's plane to XY plane (for sorting)
Quaternion cancellingRotation = Quaternion.Inverse(Quaternion.LookRotation(plane.normal));
Quaternion restoringRotation = Quaternion.LookRotation(plane.normal);
hitPoint -= activePolygon.GetCenterPoint();
Vector3 localHitPoint = cancellingRotation * hitPoint;
// Round in local space
localHitPoint = MathHelper.RoundVector3(localHitPoint, CurrentSettings.PositionSnapDistance);
// Convert back to correct space
hitPoint = restoringRotation * localHitPoint;
hitPoint += activePolygon.GetCenterPoint();
}
else
{
hitPoint = MathHelper.RoundVector3(hitPoint, CurrentSettings.PositionSnapDistance);
}
}
return(hitPoint);
}
else
{
return(null);
}
}
public static Vector2 GetUVOffset(Polygon polygon)
{
Vertex vertex1;
Vertex vertex2;
Vertex vertex3;
// Get three vertices which will reliably give us good UV information (i.e. not collinear)
SurfaceUtility.GetPrimaryPolygonDescribers(polygon, out vertex1, out vertex2, out vertex3);
Vector2 newUV = GeometryHelper.GetUVForPosition(vertex1.Position,
vertex2.Position,
vertex3.Position,
vertex1.UV,
vertex2.UV,
vertex3.UV,
polygon.GetCenterPoint());
return(newUV);
}
internal List <Polygon> ProvideSubtractChunks(List <BrushChunk> subtractChunks)
{
List <Polygon> damagedPolygons = new List <Polygon>();
List <Polygon> addedPolygons = new List <Polygon>();
// If this chunk knows about any split planes
// if(splitPlanes.Count > 0)
{
// For each of the subtract chunks
int subtractChunkCount = subtractChunks.Count;
for (int chunkIndex = 0; chunkIndex < subtractChunkCount; chunkIndex++)
{
int polygonCount = subtractChunks[chunkIndex].Polygons.Count;
// For each of the polygons within those subtract chunks
for (int j = 0; j < polygonCount; j++)
{
Polygon polygon = subtractChunks[chunkIndex].Polygons[j];
// Disregard any polygons that can't be displayed as final geometry
if (polygon.ExcludeFromFinal)
{
continue;
}
Plane polygonPlane = polygon.CachedPlaneTest;
// Determine if any of the split planes this chunk has been split against match any of those
// subtraction polygons
bool anyFound = false;
int polygonsCount = polygons.Count;
Plane splitPlane;
for (int i = 0; i < polygonsCount; i++)
{
if (!polygons[i].ExcludeFromFinal)
{
continue;
}
splitPlane = polygons[i].CachedPlaneTest;
if (MathHelper.PlaneEqualsLooserWithFlip(polygonPlane, splitPlane))
{
anyFound = true;
break;
}
}
bool added = false;
if (anyFound)
{
// TODO: Is GetCenterPoint expensive?
Vector3 target = polygon.GetCenterPoint();
// If this brush chunk contains the subtraction polygon
// TODO: This is a heftly call a lot of the time, so see about optimising
if (GeometryHelper.PolyhedronContainsPointEpsilon3(this.polygons, target))
{
added = true;
// Duplicate the subtraction polygon
polygon = polygon.DeepCopy();
// Flip it, so that it can form outer geometry
polygon.Flip();
//
//
for (int i = 0; i < this.polygons.Count; i++)
{
if (!this.polygons[i].ExcludeFromFinal && MathHelper.PlaneEqualsLooser(this.polygons[i].Plane, polygon.Plane))
{
if (!addedPolygons.Contains(this.polygons[i]))
{
//Debug.LogWarning("Removing duplicate from chunk " + this.uniqueID + " subtraction chunk " + subtractChunks[chunkIndex].UniqueID);
polygons[i].ExcludeFromFinal = true;
}
}
}
// Add it to this brush chunk
polygons.Add(polygon);
addedPolygons.Add(polygon);
}
}
if (!added)
{
damagedPolygons.Add(polygon);
}
}
}
}
return(damagedPolygons);
}