protected override bool ThroughTriangle(FrustumParams data)
{
SelectedSubItems.Sort();
//if selection filter is ByPick/VisibleByPick selects only the first triangle
if (vp.firstOnlyInternal && !vp.processVisibleOnly && SelectedSubItems.Count > 0)
{
return(false);
}
bool through = false;
for (int i = 0; i < Triangles.Length; i++)
{
if (SelectedSubItems.BinarySearch(i) >= 0)
{
continue;
}
if (ThroughTriangle(data, GetTriangleVertices(Triangles[i])))
{
SelectedSubItems.Add(i);
through = true;
if (vp.firstOnlyInternal && !vp.processVisibleOnly)
{
return(true);
}
}
}
return(through);
}
protected override bool InsideOrCrossingFrustum(FrustumParams data)
{
// Computes the triangles that are inside or crossing the selection planes
bool insideOrCrossing = false;
for (int i = 0; i < Triangles.Length; i++)
{
var verts = GetTriangleVertices(Triangles[i]);
if (Utility.InsideOrCrossingFrustum(verts[0], verts[1], verts[2], data.Frustum))
{
SelectedSubItems.Add(i);
insideOrCrossing = true;
//if selection filter is ByPick/VisibleByPick selects only the first triangle
if (vp.firstOnlyInternal && !vp.processVisibleOnly)
{
return(true);
}
}
}
return(insideOrCrossing);
}
protected override bool InsideOrCrossingScreenPolygon(ScreenPolygonParams data)
{
// Computes the triangles that are inside or crossing the screen polygon
for (int i = 0; i < Triangles.Length; i++)
{
var verts = GetTriangleVertices(Triangles[i]);
if (UtilityEx.InsideOrCrossingScreenPolygon(verts[0], verts[1], verts[2], data))
{
SelectedSubItems.Add(i);
}
}
return(false);
}
protected override bool ThroughTriangleScreenPolygon(ScreenPolygonParams data)
{
SelectedSubItems.Sort();
for (int i = 0; i < Triangles.Length; i++)
{
if (SelectedSubItems.BinarySearch(i) >= 0)
{
continue;
}
var verts = GetTriangleVertices(Triangles[i]);
if (ThroughTriangleScreenPolygon(verts[0], verts[1], verts[2], data))
{
SelectedSubItems.Add(i);
}
}
return(false);
}
protected override bool InsideOrCrossingScreenPolygon(ScreenPolygonParams data)
{
// Computes the lines that are inside or crossing the screen polygon
for (int i = 0; i < Lines.Length; i++)
{
Segment2D seg;
IndexLine line = Lines[i];
Point3D pt1 = Vertices[line.V1];
Point3D pt2 = Vertices[line.V2];
Point3D screenP1 = vp.Camera.WorldToScreen(pt1, data.ViewFrame);
Point3D screenP2 = vp.Camera.WorldToScreen(pt2, data.ViewFrame);
if (screenP1.Z > 1 || screenP2.Z > 1)
{
return(false); // for perspective
}
seg = new Segment2D(screenP1, screenP2);
if (UtilityEx.PointInPolygon(screenP1, data.ScreenPolygon) ||
UtilityEx.PointInPolygon(screenP2, data.ScreenPolygon))
{
SelectedSubItems.Add(i);
continue;
}
for (int j = 0; j < data.ScreenSegments.Count; j++)
{
Point2D i0;
if (Segment2D.Intersection(data.ScreenSegments[j], seg, out i0))
{
SelectedSubItems.Add(i);
break;
}
}
}
return(false);
}
protected override bool InsideOrCrossingFrustum(FrustumParams data)
{
// Computes the lines that are inside or crossing the selection planes
bool insideOrCrossing = false;
for (int i = 0; i < Lines.Length; i++)
{
if (Utility.IsSegmentInsideOrCrossing(data.Frustum, new Segment3D(Vertices[Lines[i].V1], Vertices[Lines[i].V2])))
{
SelectedSubItems.Add(i);
insideOrCrossing = true;
//if selection filter is ByPick/VisibleByPick selects only the first line
if (vp.firstOnlyInternal && !vp.processVisibleOnly)
{
return(true);
}
}
}
return(insideOrCrossing);
}