public void RecalcPrimaryDependant(Canguro.View.GraphicView activeView, PointMagnet primaryPoint, LineMagnet[] globalAxes)
{
if (primaryPoint != null)
{
// Move area to lay on the primaryPoint and to set its direction any canonic
// plane (X=x, Y=y or Z=z) which is the most paralell to the screen plane
position = primaryPoint.Position;
// Get screen plane normal
Vector3 s0 = screenNormal[0], s1 = screenNormal[1], sNormal;
activeView.Unproject(ref s0);
activeView.Unproject(ref s1);
sNormal = s0 - s1;
// Assign the area normal to the most paralell canonical plane
// (giving priority to the Z plane)
int maxCosIndex = 2;
float cosX, cosY, cosZ;
cosX = Vector3.Dot(sNormal, globalAxes[0].Direction);
cosY = Vector3.Dot(sNormal, globalAxes[1].Direction);
cosZ = Vector3.Dot(sNormal, globalAxes[2].Direction);
if (Math.Abs(cosZ) < minZPlaneAngle)
maxCosIndex = (cosX >= cosY) ? ((cosX > cosZ) ? 0 : 2) : ((cosY > cosZ) ? 1 : 2);
normal = globalAxes[maxCosIndex].Direction;
}
else
{
position = Vector3.Empty;
normal = globalAxes[2].Direction;
}
}
public override bool Equals(object obj)
{
LineMagnet lm = obj as LineMagnet;
if (lm != null)
{
if (line == null && lm.line == null)
{
if (direction == lm.direction)
{
return(true);
}
else
{
return(false);
}
}
else if ((line != null && lm.line == null) || (line == null && lm.line != null))
{
return(false);
}
else if (line != null && lm.line != null)
{
return(line == lm.line);
}
}
return(line == obj);
}
public override object Clone()
{
LineMagnet lm = new LineMagnet();
copyToMagnet(lm);
lm.direction = direction;
lm.line = line;
lm.snapPosition = snapPosition;
lm.type = type;
return lm;
}
public override object Clone()
{
LineMagnet lm = new LineMagnet();
copyToMagnet(lm);
lm.direction = direction;
lm.line = line;
lm.snapPosition = snapPosition;
lm.type = type;
return(lm);
}
/// <summary>
/// Calculate the intersection point of two coplanar lines
/// Source: http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline3d/
/// </summary>
/// <param name="l1">First LineMagnet</param>
/// <param name="l2">Second LineMagnet</param>
/// <returns>The intersection point magnet or null if none found</returns>
private PointMagnet createIntersection(LineMagnet l1, LineMagnet l2, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (l1 != null && l2 != null)
{
float numer, denom;
float d1, d2, d3, d4, d5;
Vector3 p13 = l1.Position - l2.Position;
Vector3 p21 = l1.Direction;
Vector3 p43 = l2.Direction;
d1 = p13.X * p43.X + p13.Y * p43.Y + p13.Z * p43.Z;
d2 = p43.X * p21.X + p43.Y * p21.Y + p43.Z * p21.Z;
d3 = p13.X * p21.X + p13.Y * p21.Y + p13.Z * p21.Z;
d4 = p43.X * p43.X + p43.Y * p43.Y + p43.Z * p43.Z;
d5 = p21.X * p21.X + p21.Y * p21.Y + p21.Z * p21.Z;
denom = d5 * d4 - d2 * d2;
if (Math.Abs(denom) < float.Epsilon)
{
return(null);
}
numer = d1 * d2 - d3 * d4;
float r = numer / denom;
float s = (d1 + d2 * r) / d4;
Vector3 pa = l1.Position + Vector3.Scale(p21, r);
Vector3 pb = l2.Position + Vector3.Scale(p43, s);
if ((pa - pb).Length() > 0.0001)
{
return(null);
}
// Create magnet
PointMagnet intPtMagnet = new PointMagnet(pa,
PointMagnetType.Intersection);
if (intPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
intPtMagnet.RelatedMagnets.Add(l1);
intPtMagnet.RelatedMagnets.Add(l2);
return(intPtMagnet);
}
}
return(null);
}
/// <summary>
/// Method to add a perpendicular point magnet if the mouse is close to where it is
/// </summary>
private PointMagnet addPerpendicularMagnet(LineMagnet lm, PointMagnet pm, float lmDot, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
float r = Vector3.Dot(lm.Direction, pm.Position - lm.Position) / lmDot;
PointMagnet perpPtMagnet = new PointMagnet(lm.Position + Vector3.Scale(lm.Direction, r),
PointMagnetType.Perpendicular);
if (perpPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
perpPtMagnet.RelatedMagnets.Add(pm);
perpPtMagnet.RelatedMagnets.Add(lm);
points.Add(perpPtMagnet);
return(perpPtMagnet);
}
return(null);
}
/// <summary>
/// Gets an interesting point by following the line in reverse (as a mirror) and trying
/// to find Joints at the same distance from the LineMagnet's position
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>A point magnet with the interesting point or null if none found</returns>
private PointMagnet createInterestingDistance(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null)
{
return(null);
}
Vector3 pos = lm.Position;
activeView.Project(ref pos);
Vector3 reversePickPos = pos + pos - new Vector3(e.X, e.Y, 0f);
List <Item> pickedItems = Canguro.View.GraphicViewManager.Instance.PickItem((int)reversePickPos.X, (int)reversePickPos.Y);
if (pickedItems == null)
{
return(null);
}
foreach (Item item in pickedItems)
{
Joint j;
// Check if Joint si over line lm
if ((j = item as Joint) != null)
{
Vector3 ptInLine = Vector3.Cross(lm.Direction, j.Position - lm.Position);
if (Vector3.Dot(ptInLine, ptInLine) < float.Epsilon)
{
PointMagnet distMagnet = new PointMagnet(lm.Position + lm.Position - j.Position, PointMagnetType.SimplePoint);
distMagnet.RelatedMagnets.Add(new PointMagnet(j));
points.Add(distMagnet);
return(distMagnet);
}
}
}
return(null);
}
/// <summary>
/// Returns a perpendicular point magnet P if there's a point X and a line L which can be united
/// by a perpendicular line:
///
/// L
/// |
/// |
/// X - - - - - - - - P
/// |
/// |
///
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>The perpendicular point magnet or null if none found</returns>
private PointMagnet createPerpendicularMagnet(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null)
{
return(null);
}
float lmDot = Vector3.Dot(lm.Direction, lm.Direction);
if (points.PrimaryPoint != null)
{
PointMagnet perp = addPerpendicularMagnet(lm, points.PrimaryPoint, lmDot, activeView, e);
if (perp != null)
{
return(perp);
}
}
if (points.LastPoint != null)
{
return(addPerpendicularMagnet(lm, points.LastPoint, lmDot, activeView, e));
}
return(null);
}
/// <summary>
/// Method to try to create a midpoint magnet if the mouse is close to one
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>The MidPoint magnet or null if none found</returns>
private PointMagnet createMidPoint(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null)
{
return(null);
}
LineElement l;
if ((l = lm.Line) != null)
{
PointMagnet midPtMagnet = new PointMagnet(Vector3.Scale(l.I.Position + l.J.Position, 0.5f),
PointMagnetType.MidPoint);
if (midPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
midPtMagnet.RelatedMagnets.Add(lm);
points.Add(midPtMagnet);
return(midPtMagnet);
}
}
return(null);
}
/// <summary>
/// Returns a perpendicular point magnet P if there's a point X and a line L which can be united
/// by a perpendicular line:
///
/// L
/// |
/// |
/// X - - - - - - - - P
/// |
/// |
///
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>The perpendicular point magnet or null if none found</returns>
private PointMagnet createPerpendicularMagnet(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null) return null;
float lmDot = Vector3.Dot(lm.Direction, lm.Direction);
if (points.PrimaryPoint != null)
{
PointMagnet perp = addPerpendicularMagnet(lm, points.PrimaryPoint, lmDot, activeView, e);
if (perp != null) return perp;
}
if (points.LastPoint != null)
return addPerpendicularMagnet(lm, points.LastPoint, lmDot, activeView, e);
return null;
}
/// <summary>
/// Method to try to create a midpoint magnet if the mouse is close to one
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>The MidPoint magnet or null if none found</returns>
private PointMagnet createMidPoint(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null) return null;
LineElement l;
if ((l = lm.Line) != null)
{
PointMagnet midPtMagnet = new PointMagnet(Vector3.Scale(l.I.Position + l.J.Position, 0.5f),
PointMagnetType.MidPoint);
if (midPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
midPtMagnet.RelatedMagnets.Add(lm);
points.Add(midPtMagnet);
return midPtMagnet;
}
}
return null;
}
/// <summary>
/// Calculate the intersection point of two coplanar lines
/// Source: http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline3d/
/// </summary>
/// <param name="l1">First LineMagnet</param>
/// <param name="l2">Second LineMagnet</param>
/// <returns>The intersection point magnet or null if none found</returns>
private PointMagnet createIntersection(LineMagnet l1, LineMagnet l2, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (l1 != null && l2 != null)
{
float numer, denom;
float d1, d2, d3, d4, d5;
Vector3 p13 = l1.Position - l2.Position;
Vector3 p21 = l1.Direction;
Vector3 p43 = l2.Direction;
d1 = p13.X * p43.X + p13.Y * p43.Y + p13.Z * p43.Z;
d2 = p43.X * p21.X + p43.Y * p21.Y + p43.Z * p21.Z;
d3 = p13.X * p21.X + p13.Y * p21.Y + p13.Z * p21.Z;
d4 = p43.X * p43.X + p43.Y * p43.Y + p43.Z * p43.Z;
d5 = p21.X * p21.X + p21.Y * p21.Y + p21.Z * p21.Z;
denom = d5 * d4 - d2 * d2;
if (Math.Abs(denom) < float.Epsilon)
return null;
numer = d1 * d2 - d3 * d4;
float r = numer / denom;
float s = (d1 + d2 * r) / d4;
Vector3 pa = l1.Position + Vector3.Scale(p21, r);
Vector3 pb = l2.Position + Vector3.Scale(p43, s);
if ((pa - pb).Length() > 0.0001)
return null;
// Create magnet
PointMagnet intPtMagnet = new PointMagnet(pa,
PointMagnetType.Intersection);
if (intPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
intPtMagnet.RelatedMagnets.Add(l1);
intPtMagnet.RelatedMagnets.Add(l2);
return intPtMagnet;
}
}
return null;
}
/// <summary>
/// Gets an interesting point by following the line in reverse (as a mirror) and trying
/// to find Joints at the same distance from the LineMagnet's position
/// </summary>
/// <param name="lm">The Line Magnet being followed</param>
/// <param name="activeView">The view in which the snap is taking place</param>
/// <param name="e">The MouseEventArgs of the last MouseMove event</param>
/// <returns>A point magnet with the interesting point or null if none found</returns>
private PointMagnet createInterestingDistance(LineMagnet lm, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
if (lm == null) return null;
Vector3 pos = lm.Position;
activeView.Project(ref pos);
Vector3 reversePickPos = pos + pos - new Vector3(e.X, e.Y, 0f);
List<Item> pickedItems = Canguro.View.GraphicViewManager.Instance.PickItem((int)reversePickPos.X, (int)reversePickPos.Y);
if (pickedItems == null) return null;
foreach (Item item in pickedItems)
{
Joint j;
// Check if Joint si over line lm
if ((j = item as Joint) != null)
{
Vector3 ptInLine = Vector3.Cross(lm.Direction, j.Position - lm.Position);
if (Vector3.Dot(ptInLine, ptInLine) < float.Epsilon)
{
PointMagnet distMagnet = new PointMagnet(lm.Position + lm.Position - j.Position, PointMagnetType.SimplePoint);
distMagnet.RelatedMagnets.Add(new PointMagnet(j));
points.Add(distMagnet);
return distMagnet;
}
}
}
return null;
}
/// <summary>
/// Method to add a perpendicular point magnet if the mouse is close to where it is
/// </summary>
private PointMagnet addPerpendicularMagnet(LineMagnet lm, PointMagnet pm, float lmDot, GraphicView activeView, System.Windows.Forms.MouseEventArgs e)
{
float r = Vector3.Dot(lm.Direction, pm.Position - lm.Position) / lmDot;
PointMagnet perpPtMagnet = new PointMagnet(lm.Position + Vector3.Scale(lm.Direction, r),
PointMagnetType.Perpendicular);
if (perpPtMagnet.Snap(activeView, e.Location) < SnapViewDistance)
{
perpPtMagnet.RelatedMagnets.Add(pm);
perpPtMagnet.RelatedMagnets.Add(lm);
points.Add(perpPtMagnet);
return perpPtMagnet;
}
return null;
}
