DAPoint2 Class

Creates a DAPoint2 object that represents a two-dimensional point that can be animated (vary over time). At any given time, the value is a point representing a location in a plane or on the screen. Each point has a pair of coordinate values that define the point's location relative to a fixed point called the origin. These coordinate values are given as either Cartesian coordinates (x,y) or polar coordinates (XYangle,length) when the point DAPoint2 object is created.

Because coordinate values are DANumber objects the location of a DAPoint2 can change over time as the DANumbers change.

This class inherits from DABehavior.

• DAPoint2 Functions
• DAPoint2 Properties
• Relevant Functions from the DAStatics Class
• Relevant Properties from the DAStatics Class

DAPoint2 Functions

AnimateControlPositionPixel

Transform

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AnimateControlPositionPixel

DAPoint2 Class

Used to form fragments of script and pass them to the scripting engine on every frame. This function is specifically with DAPoint2 objects to animate the two-dimensional position of an element on the page.

The AnimateControlPositionPixel function always treats the values of the points as pixels rather than meters and considers positive-y to be down rather than up. The (0,0) point is in the upper-left corner.

point2Obj.AnimateControlPositionPixel(
  property,
  language,
  invoke,
  interval
  )

Parameters

property

A string that is either the name of the property to animate or the name of a scripting function to invoke that will set the property.

language

A string that is name of the scripting language.

invoke

A boolean that determines if the position is set directly or if a function is invoked. If FALSE, the position is set directly. If TRUE, a function is invoked.

interval

A double specifying how frequently the position is updated.

Return Values

Returns the DAPoint2 object.

---

Transform

DAPoint2 Class

Creates a DAPoint2 object that is the result of applying the given transformation to the original DAPoint2 object.

point2Obj.Transform(
  xf
  )

Parameters

xf

The DATransform2 object.

Return Values

Returns the DAPoint2 object.

Remarks

This function composes values. The resulting transformation is the new value applied to the old value.

DAPoint2 Properties

PolarCoordAngle

PolarCoordLength

X

Y

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PolarCoordAngle

DAPoint2 Class

A read-only property with a DANumber value that represents the counter-clockwise angular displacement, in radians, relative to the positive x-axis, of the pointObj. The range is [-Pi, +Pi].

point2Obj.PolarCoordAngle

See Also

PolarCoordLength, Point2PolarAnim

---

PolarCoordLength

DAPoint2 Class

A read-only property with a DANumber value that represents the distance of the point from the origin.

point2Obj.PolarCoordLength

See Also

PolarCoordAngle, Point2PolarAnim

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X

DAPoint2 Class

A read-only property with a DANumber value that represents the x coordinate of the point2Obj.

point2Obj.X

Return Values

Returns the DANumber object.

See Also

Y, Point2Anim

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Y

DAPoint2 Class

A read-only property with a DANumber value that represents the y coordinate of the point2Obj.

point2Obj.Y

See Also

X, Point2Anim

Relevant Functions from the DAStatics Class

The following functions are defined in the DAStatics class and are most relevant to objects of type DAPoint2.

lib.AddPoint2Vector(pt, vec)

lib.DerivativePoint2(pt)

lib.DistancePoint2(p1, p2)

lib.DistanceSquaredPoint2(p1, p2)

lib.Point2(x, y)

lib.Point2Anim(x, y)

lib.Point2BSpline(degree, knots, control_elements, weights, evaluation)

lib.Point2PolarAnim(XYangle, length)

lib.Point2Polar(XYangle, length)

lib.SubPoint2(p1, p2)

lib.SubPoint2Vector(pt, vec)

Relevant Properties from the DAStatics Class

The following properties are defined in the DAStatics class and are most relevant to objects of type DAPoint2.

lib.MousePosition

lib.Origin2

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