// Currently this is the only constructor, and it requires an OperationType value
// It will automatically generate the RegionKeepCondition delegate functions (via MajorityCondition)
public CSG(OperationType op)
{
first_keep = MajorityCondition(
((p) => second_blob.IsPointInside(p)),
DoesOpAccept(op, 0, true) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete,
DoesOpAccept(op, 0, false) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete);
second_keep = MajorityCondition(
((p) => first_blob.IsPointInside(p)),
DoesOpAccept(op, 1, true) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete,
DoesOpAccept(op, 1, false) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete);
}
// Currently this is the only constructor, and it requires an OperationType value
// It will automatically generate the RegionKeepCondition delegate functions (via MajorityCondition)
public CSG(OperationType op)
{
first_keep = MajorityCondition(
((p) => second_blob.IsPointInside(p)),
DoesOpAccept(op, 0, true) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete,
DoesOpAccept(op, 0, false) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete);
second_keep = MajorityCondition(
((p) => first_blob.IsPointInside(p)),
DoesOpAccept(op, 1, true) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete,
DoesOpAccept(op, 1, false) ? invert_first ? RegionBehavior.Flip : RegionBehavior.Normal : RegionBehavior.Delete);
}
public List <BasicModelVert> Trim(RegionKeepCondition keepCondition) // hypothetically, only one of keepInside or keepOutside should be true
{
List <List <int> > regions = DivideIntoRegions();
int numRegions = regions.Count;
List <BasicModelVert> result = new List <BasicModelVert>();
RegionBehavior[] behaviors = new RegionBehavior[numRegions];
for (int i = 0; i < numRegions; i++)
{
List <PreResultTriangle> regionTriangles = new List <PreResultTriangle>();
foreach (int j in regions[i])
{
regionTriangles.Add(triangles[j]);
}
RegionBehavior behavior = behaviors[i] = keepCondition(regionTriangles);
if (behavior != RegionBehavior.Delete)
{
if (behavior == RegionBehavior.Normal)
{
foreach (int index in regions[i])
{
result.AddRange(triangles[index].verts);
}
}
else
{
int[] winding = new int[] { 2, 1, 0 };
int numTriangles = regions[i].Count;
for (int j = 0; j < numTriangles; j++)
{
int index = regions[i][j];
foreach (int k in winding)
{
BasicModelVert vert = triangles[regions[i][j]].verts[k];
vert.normal = -vert.normal;
result.Add(vert);
}
}
}
}
}
return(result);
}
// hypothetically, only one of keepInside or keepOutside should be true
public List<BasicModelVert> Trim(RegionKeepCondition keepCondition)
{
List<List<int>> regions = DivideIntoRegions();
int numRegions = regions.Count;
List<BasicModelVert> result = new List<BasicModelVert>();
RegionBehavior[] behaviors = new RegionBehavior[numRegions];
for (int i = 0; i < numRegions; i++)
{
List<PreResultTriangle> regionTriangles = new List<PreResultTriangle>();
foreach(int j in regions[i])
regionTriangles.Add(triangles[j]);
RegionBehavior behavior = behaviors[i] = keepCondition(regionTriangles);
if (behavior != RegionBehavior.Delete)
{
if (behavior == RegionBehavior.Normal)
{
foreach (int index in regions[i])
result.AddRange(triangles[index].verts);
}
else
{
int[] winding = new int[] {2, 1, 0 };
int numTriangles = regions[i].Count;
for (int j = 0; j < numTriangles; j++)
{
int index = regions[i][j];
foreach(int k in winding)
{
BasicModelVert vert = triangles[regions[i][j]].verts[k];
vert.normal = -vert.normal;
result.Add(vert);
}
}
}
}
}
return result;
}
// After the cuts are done, finds continuous regions of the surface of one of the input models and returns the properly trimmed/flipped regions
protected virtual List <BasicModelVert> ScrapTrimmedStuff(List <BasicModelVert> safeZone, List <BasicModelVert> notsafeZone, List <Vec3[]> cutEdges, RegionKeepCondition regionCondition)
{
PreResultModel prm = new PreResultModel();
prm.ProhibitEdges(cutEdges);
prm.AddTriangles(notsafeZone);
prm.AddTriangles(safeZone);
return(prm.Trim(regionCondition));
}
// After the cuts are done, finds continuous regions of the surface of one of the input models and returns the properly trimmed/flipped regions
protected virtual List<BasicModelVert> ScrapTrimmedStuff(List<BasicModelVert> safeZone, List<BasicModelVert> notsafeZone, List<Vec3[]> cutEdges, RegionKeepCondition regionCondition)
{
PreResultModel prm = new PreResultModel();
prm.ProhibitEdges(cutEdges);
prm.AddTriangles(notsafeZone);
prm.AddTriangles(safeZone);
return prm.Trim(regionCondition);
}