VRML_CUBE Procedure
Positions a VRML cube in the world.
Usage
VRML_CUBE
Input Parameters
None.
Keywords
Use these keywords to set the object properties and material properties.
Object Properties
The following keywords describe or define the VRML cube object.
Center—A 3-element array specifying the true center of the cube object. (Default: [0, 0, 0])
Rotation—A 3-element array of values in degrees, specifying the rotation about the x, y, and z axes, respectively.
Transform—A 4-by-4 matrix containing the transformation to be applied to the cube object.
Widths—A scalar value applied to each of the three directions, or a 3-element array of values specifying the width in each direction (x, y, z) individually. (Default: 2.0)
Material Properties
The following properties, when set, are applied to the object.
AmbientColor—A 3-element array of RGB color with each element ranging between 0 and 255. If the value is scalar, then the color is interpreted as grayscale.
DiffuseColor—A 3-element array of RGB color with each element ranging between 0 and 255. If the value is scalar, then the color is interpreted as grayscale.
EmissiveColor—A 3-element array of RGB color with each element ranging between 0 and 255. If the value is scalar, then the color is interpreted as grayscale.
Shininess—Scalar shininess factor, in the range of 0 to 255.
SpecularColor—A 3-element array of RGB color with each element ranging between 0 and 255. If the value is scalar, then the color is interpreted as grayscale.
Texture_Image—A texture image to apply to the object. The image is wrapped completely around the object. The texture image values and transparency values lie in the range of 0 to 255. There are four options:
(w, h) or (1, w, h)—Grayscale image(2, w, h)—Grayscale in (0, *, *) plus transparency in (1, *, *)(3, w, h)—True color image (red, green, blue)(4, w, h)—True color plus transparency in (3, *, *)Transparency—A scalar transparency factor, in the range of 0 to 255.
Discussion
The VRML_CUBE procedure produces a 2-by-2-by-2 cube centered around a defined origin. This routine supports the cube node in VRML.
Example
The 'wavelogo.dat' file used in this example is found in the following directory:
(UNIX) <wavedir>/demo/web/vrml
(WIN) <wavedir>\demo\web\vrml
where <wavedir> is the main PV‑WAVE directory.
; Restore variables for img, r, g, b.
RESTORE, 'wavelogo.dat'
sz = SIZE(img)
col = TRANSPOSE([[r], [g], [b]])
img24 = REFORM(col(*, img), 3, sz(1), sz(2))
; A cube with the wave logo on it.
VRML_CUBE, Center = [-5, -3, 5], Width = 3, Texture = img24
VRML_CUBE, Center = [4, -2, -2], Rotation = [0, 0, 0], $
DiffuseColor = [127, 255, 191], AmbientColor = [55, 70, 60], $
SpecularColor = [0, 100, 0]
VRML_CUBE, Center = [4, -2, -2], Rotation = [45, 0, 0], $
DiffuseColor = [127, 255, 191], AmbientColor = [55, 70, 60],$
SpecularColor = [0, 100, 0]
VRML_CUBE,Center = [4, -2, -2], Rotation = [0, 45, 0], $
DiffuseColor = [127, 255, 191], AmbientColor = [55, 70, 60],$
SpecularColor = [0, 100, 0]
VRML_CUBE,Center = [4, -2, -2], Rotation = [0, 0, 45], $
DiffuseColor = [127, 255, 191], AmbientColor = [55, 70, 60], $
SpecularColor = [0, 100, 0]
See Also
For a discussion of cubes and other VRML primitives, see The VRML Sourcebook, by Andrea L. Ames, et al., John Wiley & Sons, Inc., 1996, Chapter 3.
