DirectAnimation Animated Header --DAVector2 Class DirectAnimation Animated Header --DAVector2 Class* Microsoft DirectAnimation SDK
*Index  *Topic Contents
*Previous Topic: DAUserData Class
*Next Topic: DAVector3 Class

DAVector2 Class


Creates a Vector2 object. At any given time, the value of the object is a direction and length (magnitude), specified as a pair of coordinate values given as either Cartesian coordinates (x, y) or polar coordinates (XYangle, YZangle). The direction of the vector is parallel to the ray that starts at the origin and passes through the point specified by the vector's coordinates, and the length is the distance between the origin and the point.

Because coordinate values are animated numbers (DANumber objects), the direction and length of the Vector2 object can change over time as the values of the animated numbers change.

This class inherits from the DABehavior Class.

DAVector2 Functions

bullet1.gifDivAnim

bullet1.gifDiv

bullet1.gifMulAnim

bullet1.gifMul

bullet1.gifNormalize

bullet1.gifTransform


DivAnim

DAVector2 Class

Creates a new two-dimensional DAVector2 object that points in the same direction as the original vector but has a length that has been divided by scalar.

vector2Obj.DivAnim(
  scalar
  )

Parameters
scalar
A DANumber object used as the divider. This must be an animated number.
Return Values

Returns the DAVector2 object.

See Also

MulAnim


Div

Same as DivAnim except that scalar is a non-animated number (a double).

vector2Obj.Div(
  scalar
  )


MulAnim

Creates a DAVector2 object that points in the same direction as the original vector but has a length that has been multiplied by scalar.

vector2Obj.MulAnim(
  scalar
  )

Parameters
scalar
A DANumber object used as the multiplier. This must be an animated number.
Return Values

Returns the DAVector2 object.

See Also

DivAnim


Mul

Same as MulAnim except that scalar is a non-animated number (a double).

vector2Obj.Mul(
  scalar
  )


Normalize

Creates a normalized, two-dimensional DAVector2 object. The normalized vector has the same direction as the original vector, but the length is 1.

vector2Obj.Normalize

Return Values

Returns the DAVector2 object.


Transform

Creates a DAVector2 object that is the result of applying the given transformation to the original vector. The translation elements of the transformation are ignored because translation does not apply to vectors.

vector2Obj.Transform(
  xf
  )

Parameters
xf
A DATransform2 object.
Return Values

Returns the DAVector2 object.

Remarks

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

DAVector2 Properties

bullet1.gifLength

bullet1.gifLengthSquared

bullet1.gifPolarCoordAngle

bullet1.gifPolarCoordLength

bullet1.gifX

bullet1.gifY


Length

A read-only property with a DANumber value that represents the length of a DAVector2 object.

vector2Obj.Length

See Also

LengthSquared


LengthSquared

A read-only property with a DANumber value that represents the length of a DAVector2 object squared.

vector2Obj.LengthSquared

See Also

Length


PolarCoordAngle

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 DAVector2 object. The range is [-Pi, +Pi].

vector2Obj.PolarCoordAngle


PolarCoordLength

A read-only property with a DANumber value that represents the length (or magnitude) of the vector.

vector2Obj.PolarCoordLength


X

A read-only property with a DANumber value that represents the X-coordinate of the DAVector2 object.

vector2Obj.X

See Also

Y, Vector2Anim


Y

A read-only property with a DANumber value that represents the Y-coordinate of the DAVector2 object.

vector2Obj.Y

See Also

X, Vector2Anim

Relevant Functions from the DAStatics Class

The following functions are defined in the DAStatics class and are most relevant to objects of type DAVector2.

lib.AddVector2(v1, v2)

lib.DerivativeVector2(vec)

lib.DotVector2(v1, v2)

lib.IntegralVector2(vec)

lib.NegVector2(v1)

lib.SubVector2(v1, v2)

lib.Vector2Anim(x, y)

lib.Vector2(x, y)

lib.Vector2BSpline(degree, knots, control_elements, weights, evaluation)

lib.Vector2PolarAnim(XYangle, length)

lib.Vector2Polar(XYangle, length)

lib.Vector2PolarDegrees(XYangle, length)

Relevant Properties from the DAStatics Class

The following properties are defined in the DAStatics class and are most relevant to objects of type DAVector2.

lib.XVector2

lib.YVector2

lib.ZeroVector2

© 1998 Microsoft Corporation. All rights reserved. Terms of Use.

*Top of Page