| Package | flash.geom |
| Class | public class Utils3D |
| Inheritance | Utils3D  Object |
| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Related API Elements
flash.geom.Vector3D
flash.geom.Transform
flash.geom.PerspectiveProjection
flash.display.Graphics
flash.display.GraphicsTrianglePath
Vector
| Property | Defined By | ||
|---|---|---|---|
 | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| Method | Defined By | ||
|---|---|---|---|
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Indicates whether an object has a specified property defined. | Object | |
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Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
pointTowards(percent:Number, mat:Matrix3D, pos:Vector3D, at:Vector3D = null, up:Vector3D = null):Matrix3D [static]
Interpolates the orientation of an object toward a position. | Utils3D | ||
[static]
Using a projection Matrix3D object, projects a Vector3D object from one space coordinate to another. | Utils3D | ||
projectVectors(m:Matrix3D, verts:Vector.<Number>, projectedVerts:Vector.<Number>, uvts:Vector.<Number>):void [static]
Using a projection Matrix3D object, projects a Vector of three-dimensional space coordinates (verts)
to a Vector of two-dimensional space coordinates (projectedVerts). | Utils3D | ||
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Indicates whether the specified property exists and is enumerable. | Object | |
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Sets the availability of a dynamic property for loop operations. | Object | |
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Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
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Returns the primitive value of the specified object. | Object | |
pointTowards | () | method |
public static function pointTowards(percent:Number, mat:Matrix3D, pos:Vector3D, at:Vector3D = null, up:Vector3D = null):Matrix3D| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Interpolates the orientation of an object toward a position. The pointTowards()
method combines the functionality of the Matrix3D.pointAt() and
Matrix3D.interpolateTo() methods.
The pointTowards() method allows for in-place modification to the orientation.
It decomposes the Matrix3D of the display object and replaces the rotation elements
by ones that make a percent turn toward the position of the target. The object
can make an incremental turn toward the target while still moving in its own direction.
The consecutive calls to the pointTowards() followed by a translation method
can produce the animation of an object chasing or following a moving target.
First point the object a percent point toward the target, then incrementally move the
object along an axis.
Parameters
percent:Number — A Number between 0 and 1 that incrementally turns the object toward the target.
| |
mat:Matrix3D — The Matrix3D property of the object that is transformed.
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pos:Vector3D — The world-relative position of the target object. World-relative defines
the transformation of the object relative to the world space and coordinates,
where all objects are positioned.
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at:Vector3D (default = null) | |
up:Vector3D (default = null) |
Matrix3D — A modified version of the Matrix3D object specified in the second parameter. To
transform the display object using the pointTowards() method, set the Matrix3D property
of the display object to the returned Matrix3D object.
|
Related API Elements
projectVector | () | method |
public static function projectVector(m:Matrix3D, v:Vector3D):Vector3D| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Using a projection Matrix3D object, projects a Vector3D object from one space coordinate to another.
The projectVector() method is like the Matrix3D.transformVector()
method except that the projectVector() method divides the x, y, and z
elements of the original Vector3D object by the projection depth value. The depth value is the distance
from the eye to the Vector3D object in view or eye space. The default value for this distance is the
value of the z element.
Parameters
m:Matrix3D — A projection Matrix3D object that implements the projection transformation. If a display object
has a PerspectiveProjection object, you can use the perspectiveProjection.toMatrix() method
to produce a projection Matrix3D object that applies to the children of the display object. For more advance
projections, use the matrix3D.rawData property to create a custom projection matrix.
There is no built-in Matrix3D method for creating a projection Matrix3D object.
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v:Vector3D — The Vector3D object that is projected to a new space coordinate.
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Vector3D — A new Vector3D with a transformed space coordinate.
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Related API Elements
projectVectors | () | method |
public static function projectVectors(m:Matrix3D, verts:Vector.<Number>, projectedVerts:Vector.<Number>, uvts:Vector.<Number>):void| Language Version: | ActionScript 3.0 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Using a projection Matrix3D object, projects a Vector of three-dimensional space coordinates (verts)
to a Vector of two-dimensional space coordinates (projectedVerts). The projected Vector
object should be pre-allocated before it is used as a parameter.
The projectVectors() method also sets the t value of the uvt data.
You should pre-allocate a Vector that can hold the uvts data for each projected
Vector set of coordinates. Also specify the u and v values of the
uvt data. The uvt data is a Vector of normalized coordinates used for texture
mapping. In UV coordinates, (0,0) is the upper left of the bitmap, and (1,1) is the lower right of the bitmap.
This method can be used in conjunction with the Graphics.drawTriangles() method
and the GraphicsTrianglePath class.
Parameters
m:Matrix3D — A projection Matrix3D object that implements the projection transformation. You can produce a
projection Matrix3D object using the Matrix3D.rawData property.
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verts:Vector.<Number> — A Vector of Numbers, where every three Numbers represent the x, y,
and z coordinates of a three-dimensional space, like Vector3D(x,y,z).
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projectedVerts:Vector.<Number> — A vector of Numbers, where every two Numbers represent a projected two-dimensional
coordinate, like Point(x,y). You should pre-allocate the Vector. The projectVectors()
method fills the values for each projected point.
| |
uvts:Vector.<Number> — A vector of Numbers, where every three Numbers represent the u, v, and t
elements of the uvt data. The u and v are the texture coordinate for each projected
point. The t value is the projection depth value, the distance from the eye to the Vector3D object in the
view or eye space. You should pre-allocate the Vector and specify the u and v values.
The projectVectors method fills the t value for each projected point.
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Related API Elements
Thu Dec 4 2014, 05:50 PM -08:00