Affine Transformations
The functions in this section all operate on the transform
data
member of the Picture
and return a Transform
representing the
transformationnot transform
.
Transform scale (real x, [real y = 1, [real z = 1]])

Function 
Performs transform.scale( x, y, z) and returns
the result. This has the effect of scaling
all of the elements of shapes and labels .

Transform shift (real x, [real y = 0, [real z = 0]])

Function 
Performs transform.shift( x, y, z) and returns
the result. This has the effect of shifting
all of the Shapes and Labels on the Picture .

Transform shift (const Point& p)

Function 
Performs transform.shift( p) and returns
the result. This has the effect of shifting
all of the Shapes and Labels on the Picture by the
x, y, and zcoordinates of p.

Transform rotate (const real x, [const real y = 0, [const real z = 0]])

Function 
Performs transform.rotate( x, y, z) and returns
the result. This has the effect of rotating
all of the elements of shapes and labels .

Transform rotate (const Point& p0, const Point& p1, [const real angle = 180]);

Function 
Performs transform.rotate( p0, p1, angle) and returns
the result. This has the effect of rotating
all of the elements of shapes and labels about the line
from p_0 to p_1.
