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Mapping modes of the new Attacher
<translate>
<!--T:1-->
{{GuiCommand|Name=Constraint InternalAngle|Workbenches=[[Sketcher Workbench|Sketcher]], [[PartDesign Workbench|PartDesign]]|Shortcut=A|MenuLocation=Sketch → Sketcher constraints → Constrain angle|SeeAlso=[[Constraint Length|Constraint Length]], [[Constraint Perpendicular|Constraint Perpendicular]]}}


==Mode Deactivated==
==Description==
'''References:''' any
Angle constraint is a [[Sketcher Datum Constraint|datum constraint]] intended to fix angles in sketch. It is capable of setting slopes of individual lines, angles between lines, angles of intersections of curves, and angle spans of circular arcs.


'''Action:''' sketch remains where it was. Attachment is disabled.
==How to use==
There are four different ways the constraint can be applied:
# to individual lines
# between lines
# to intersections of curves
# to arcs of circles


==Mode Translate==
To apply angle constraint, one should the follow the steps:
'''References:''' vertex
* Select one, two or three entities in the sketch.
* Invoke the constraint by clicking its icon on the toolbar, or selecting the menu item, or using keyboard shortcut. A datum edit dialog box pops up.
* Modify the angle if necessary. The angle can be entered as an expression that will be evaluated and the result will be stored. Click OK.


'''Action:''' sketch origin is translated to coincide with the vertex. Sketch orientation doesn't change, and can be modified by changing Placement property.
As with any datum constraint, it is possible to change the angle value later by double-clicking the constraint in constraint list or 3d view. A negative value will cause the angle direction to flip.


[[image:Attacher_mode_Translate.png|250px]]
==Constraint modes==
===line slope angle===
'''Accepted selection:''' line


[[Image:Sketcher ConsraintAngle mode1.png|600px]]


==Mode ObjectXY==
The constraint sets the polar angle of line's direction. It is the angle between the line and X axis of the sketch. This mode is applied if one line was selected.
'''References:''' object


'''Action:''' sketching plane is XY plane of object's local coordinate system (according to its Placement property).
===arc span (v0.15)===
'''Accepted selection:''' arc of circle


[[Image:Sketcher ConsraintAngle mode2.png|600px]]
[[image:Attacher_mode_ObjectXY.png|250px]]


In this mode, the constraint fixes angular span of a circular arc. This mode is applied when a circular arc was selected.


===between lines===
==Mode ObjectXZ==
'''Accepted selection:''' line + line
'''References:''' object


'''Action:''' like ObjectXY.
[[Image:Sketcher ConsraintAngle mode3.png|600px]]


[[image:Attacher_mode_ObjectXZ.png|250px]]
In this mode, the constraint sets the angle between two lines. It is not required that the lines intersect. This mode is applied when two lines were selected.




==Mode ObjectYZ==
===between curves at intersection (angle-via-point) (v0.15)===
'''References:''' object
'''Accepted selection:''' any line/curve + any line/curve + any point


'''Action:''' like ObjectXY.
[[Image:Sketcher ConsraintAngle mode4.png|600px]]


[[image:Attacher_mode_ObjectYZ.png|250px]]
In this mode, angle between two curves is constrained at the point of their intersection. The intersection point can be on curves' extensions. The point should be specified explicitly, since curves typically intersect in more than one point. This mode is applied when two curves and a point were selected.




==Mode FlatFace==
For the constraint to work correctly, the point must be on both curves. So, as the constraint is invoked, the point will be automatically constrained onto both curves ([[Sketcher helper constraint|helper constraints]] will be added, if necessary), and the angle between curves will be constrained at the point. These [[Sketcher helper constraint|helper constraints]] are plain regular constraints. They can be added manually, or deleted. There are no helper constraints on the example picture above, because the point selected is already the intersection of curves.
'''References:''' face or plane


'''Action:''' legacy. Sketching on a flat face.
==Scripting==


[[image:Attacher_mode_FlatFace.png|250px]]
Angle Constraint can be created from [[macros]] and from the python console by using the following:
</translate>
{{Code|code=
# line slope angle
Sketch.addConstraint(Sketcher.Constraint('Angle',iline,angle))


# angular span of arc
Sketch.addConstraint(Sketcher.Constraint('Angle',iarc,angle))


==Mode TangentPlane==
# angle between lines
'''References:''' face+vertex or vertex+face
Sketch.addConstraint(Sketcher.Constraint('Angle',iline1,pointpos1,iline2,pointpos2,angle))


'''Action:''' sketching plane is tangent to surface of face at the point on the surface that is closest to the vertex. If vertex is linked in first, the plane is translated to go through the vertex. If face is first, the plane touches the surface. X axis of sketch is chosen to go along internal face's parametrization.
# angle-via-point (no helper constraints are added automatically when from python)
Sketch.addConstraint(Sketcher.Constraint('AngleViaPoint',icurve1,icurve2,geoidpoint,pointpos,angle))
}}
<translate>
where:
:* <tt>Sketch</tt> is a sketch object
:* <tt>iline, iline1, iline2</tt> are integers specifying the lines by their ordinal numbers in <tt>Sketch</tt>.
:* <tt>pointpos1, pointpos2</tt> should be 1 for start point and 2 for end point. The choice of endpoints allows to set internal angle (or external), and it affects how the constraint is drawn on the screen.
:* <tt>geoidpoint</tt> and <tt>pointpos</tt> in AngleViaPoint are the indexes specifying the point of intersection.
:* <tt>angle</tt> is the angle value in radians. The angle is counted between tangent vectors in counterclockwise direction. Tangent vectors are pointing from start to end for the lines (or vice versa if ending point is supplied in angle between lines mode), and along counterclockwise direction for circles, arcs and ellipses. Quantity is also accepted as an angle (e.g. <tt>App.Units.Quantity('45 deg')</tt>)


[[image:Attacher_mode_TangentPlane.png|250px]]
</translate>

{{clear}}

<languages/>
==Mode NormalToEdge==
'''References:''' edge or edge+vertex or vertex+edge

'''Action:''' sketching plane is normal to the edge at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the virtex is first, or kept at where the curve pierces the sketch plane if edge is first. X axis of sketch is chosen automatically.

[[image:Attacher_mode_NormalToEdge.png|250px]]


==Mode FrenetNB==
'''References:''' curved edge OR curved edge+vertex OR vertex+curved edge

'''Action:''' sketching plane is normal-binormal (NB) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first. This mode is similar to NormalToEdge, except that X axis is well-defined.

[[image:Attacher_mode_FrenetNB.png|250px]]


==Mode TrenetTN==
'''References:''' curved edge OR curved edge+vertex OR vertex+curved edge

'''Action:''' sketching plane is tangent-normal (TN) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first. Effectively, if the curve is planar, the sketching plane is the plane of the curve.

[[image:Attacher_mode_FrenetTN.png|250px]]


==Mode FrenetTB==
'''References:''' curved edge OR curved edge+vertex OR vertex+curved edge

'''Action:''' sketching plane is tangent-binormal (TB) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first.

[[image:Attacher_mode_FrenetTB.png|250px]]


==Mode Concentric==
'''References:''' curved edge OR curved edge+vertex OR vertex+curved edge

'''Action:''' same as FrenetTN, but sketch origin is placed at the center of curvature of the edge.

[[image:Attacher_mode_Concentric.png|250px]]


==Mode SectionOfRevolution==
'''References:''' curved edge OR curved edge+vertex OR vertex+curved edge

'''Action:''' same as FrenetNB, but sketch origin is placed at the center of curvature of the edge, and Y axis is the axis of osculating circle. Useful to make grooves on bodies of revolution.

[[image:Attacher_mode_SectionOfRevolution.png|250px]]


==Mode ThreePointsPlane==
'''References:''' vertex+vertex+vertex or line+vertex or vertex+line or line+line

'''Action:''' sketching plane goes through three vertices defined by references. Line is treated as if it is two vertices.

[[image:Attacher_mode_ThreePointsPlane.png|250px]]


==Mode ThreePointsNormal==
'''References:''' vertex+vertex+vertex or line+vertex or vertex+line or line+line

'''Action:''' sketching plane contains first two vertices, and is normal to the plane defined by three vertices.

[[image:Attacher_mode_ThreePointsNormal.png|250px]]


==Mode Folding==
'''References:''' line+line+line+line

'''Action:''' specialty mode to fold polyhedra. See picture. It is required that all four lines share an endpoint. It is not required that both leafs to fold together are the same, like on the picture.

[[image:Attacher_mode_Folding.png|250px]]

Latest revision as of 17:21, 1 July 2015

Mapping modes of the new Attacher

Mode Deactivated

References: any

Action: sketch remains where it was. Attachment is disabled.

Mode Translate

References: vertex

Action: sketch origin is translated to coincide with the vertex. Sketch orientation doesn't change, and can be modified by changing Placement property.


Mode ObjectXY

References: object

Action: sketching plane is XY plane of object's local coordinate system (according to its Placement property).


Mode ObjectXZ

References: object

Action: like ObjectXY.


Mode ObjectYZ

References: object

Action: like ObjectXY.


Mode FlatFace

References: face or plane

Action: legacy. Sketching on a flat face.


Mode TangentPlane

References: face+vertex or vertex+face

Action: sketching plane is tangent to surface of face at the point on the surface that is closest to the vertex. If vertex is linked in first, the plane is translated to go through the vertex. If face is first, the plane touches the surface. X axis of sketch is chosen to go along internal face's parametrization.


Mode NormalToEdge

References: edge or edge+vertex or vertex+edge

Action: sketching plane is normal to the edge at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the virtex is first, or kept at where the curve pierces the sketch plane if edge is first. X axis of sketch is chosen automatically.


Mode FrenetNB

References: curved edge OR curved edge+vertex OR vertex+curved edge

Action: sketching plane is normal-binormal (NB) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first. This mode is similar to NormalToEdge, except that X axis is well-defined.


Mode TrenetTN

References: curved edge OR curved edge+vertex OR vertex+curved edge

Action: sketching plane is tangent-normal (TN) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first. Effectively, if the curve is planar, the sketching plane is the plane of the curve.


Mode FrenetTB

References: curved edge OR curved edge+vertex OR vertex+curved edge

Action: sketching plane is tangent-binormal (TB) axes of Frenet-Serret coordinates at the point of the edge's curve that is closest to the vertex (or defined by MapPathParameter property, if vertex is not linked). The origin of sketch is translated to the vertex if the vertex is first, or kept at the curve if edge is first.


Mode Concentric

References: curved edge OR curved edge+vertex OR vertex+curved edge

Action: same as FrenetTN, but sketch origin is placed at the center of curvature of the edge.


Mode SectionOfRevolution

References: curved edge OR curved edge+vertex OR vertex+curved edge

Action: same as FrenetNB, but sketch origin is placed at the center of curvature of the edge, and Y axis is the axis of osculating circle. Useful to make grooves on bodies of revolution.


Mode ThreePointsPlane

References: vertex+vertex+vertex or line+vertex or vertex+line or line+line

Action: sketching plane goes through three vertices defined by references. Line is treated as if it is two vertices.


Mode ThreePointsNormal

References: vertex+vertex+vertex or line+vertex or vertex+line or line+line

Action: sketching plane contains first two vertices, and is normal to the plane defined by three vertices.


Mode Folding

References: line+line+line+line

Action: specialty mode to fold polyhedra. See picture. It is required that all four lines share an endpoint. It is not required that both leafs to fold together are the same, like on the picture.