Class TrapezoidBounds¶
Defined in File TrapezoidBounds.hpp
Inheritance Relationships¶
Base Type¶
public Acts::PlanarBounds(Class PlanarBounds)
Class Documentation¶
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class
Acts::TrapezoidBounds: public Acts::PlanarBounds¶ Bounds for a trapezoidal, planar Surface.
Public Types
Public Functions
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TrapezoidBounds() = delete¶
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TrapezoidBounds(double halfXnegY, double halfXposY, double halfY) noexcept(false)¶ Constructor for symmetric Trapezoid.
- Parameters
halfXnegY: minimal half length X, definition at negative YhalfXposY: maximal half length X, definition at positive YhalfY: half length Y - defined at x=0
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TrapezoidBounds(const std::array<double, eSize> &values) noexcept(false)¶ Constructor for symmetric Trapezoid - from fixed size array.
- Parameters
values: the values to be stream in
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~TrapezoidBounds() override¶
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const RectangleBounds &
boundingBox() const final¶ Bounding box parameters.
- Return
rectangle bounds for a bounding box
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double
get(BoundValues bValue) const¶ Access to the bound values.
- Parameters
bValue: the class nested enum for the array access
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bool
inside(const Vector2 &lposition, const BoundaryCheck &bcheck) const final¶ The orientation of the Trapezoid is according to the figure above, in words: the shorter of the two parallel sides of the trapezoid intersects with the negative \( y \) - axis of the local frame.
The cases are:
(0)
\( y \) or \( x \) bounds are 0 || 0(1) the local position is outside
\( y \) bounds(2) the local position is inside
\( y \) bounds, but outside maximum \( x \) bounds(3) the local position is inside
\( y \) bounds AND inside minimum \( x \) bounds(4) the local position is inside
\( y \) bounds AND inside maximum \( x \) bounds, so that it depends on the \( eta \) coordinate (5) the local position fails test of (4)- Parameters
lpos: is the local position to be checked (Cartesian local frame)bcheck: is the boundary check directive
The inside check is done using single equations of straight lines and one has to take care if a point lies on the positive \( x \) half area(I) or the negative one(II). Denoting \( |x_{min}| \) and \( | x_{max} | \) as
minHalfXrespectivelymaxHalfX, such as \( | y_{H} | \) ashalfY, the equations for the straing lines in (I) and (II) can be written as:(I): \( y = \kappa_{I} x + \delta_{I} \)
(II): \( y = \kappa_{II} x + \delta_{II} \) ,
where
\( \kappa_{I} = - \kappa_{II} = 2 \frac{y_{H}}{x_{max} - x_{min}} \)and
\( \delta_{I} = \delta_{II} = - \frac{1}{2}\kappa_{I}(x_{max} + x_{min}) \)
- Return
boolean indicator for the success of this operation
- Parameters
lposition: Local position (assumed to be in right surface frame)bcheck: boundary check directive
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std::ostream &
toStream(std::ostream &sl) const final¶ Output Method for std::ostream.
- Parameters
sl: is the ostream to be dumped into
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BoundsType
type() const final¶ Return the bounds type - for persistency optimization.
- Return
is a BoundsType enum
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std::vector<double>
values() const final¶ Access method for bound values, this is a dynamically sized vector containing the parameters needed to describe these bounds.
- Return
of the stored values for this SurfaceBounds object
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