Most transform literals are formed by constructors. These are summarized in the following table.
Constructor  Param types  Description


rotate(A,P,X)
 scalar,point,vector  Rotate A degrees about point P with axis X
according to the right hand rule. See Right hand rule.
P and X are both optional and default to the origin and
the zaxis respectively.

translate(X)
 vector  Translate by X .

scale(S)
 scalar  Scale uniformly by factor S .

scale(V)
 vector  Scale along each axis by components of V .

project()
 —  Same as scale([1,1,0]) .

project(S)
 scalar  Perspective projection with view center at origin and projection
plane z=S .

perspective(S)
 scalar  Perspective transform identical to project(S)
except that the zcoordinate of the transformed result is
pseudodepth, usable by the hidden surface algorithm.

view(E,D,U)
 point,vector,vector  View transform similar to that of OpenGL 's. The
eye point E is translated to the origin while a rotation
is also applied that makes the view direction vector D
and the view “up” vector U point in the negative
z and the ydirections respectively. If U is
omitted, it defaults to [0,1,0]. When U is omitted,
D may be also; it defaults to (0,0,0)(E) , a vector
pointing from the eye toward the origin.

view(E,L,U)
 point,point,vector  An alternate form of view(E,D,U) above where
the view direction parameter D is replaced with a
“look at” point L , i.e., a point where the viewer is focusing
her attention. This form of view is equivalent to
view(E, (L)(E), U) , where (L)(E) is a direction
vector. U is optional and defaults to [0,1,0].

[[a_11,a_12,a_13,a_14] [a_21,a_22,a_23,a_24] [a_31,a_32,a_33,a_34] [a_41,a_42,a_43,a_44]]  16 scalars  Direct transform matrix definition. Each
of the a_ij is a scalar expression. If you don't know what
this is about, you don't need it.

project
constructor is not generally useful because it
defeats hidden surface removal by collapsing the scene onto a single
plane. It is a special purpose transform for drawing pictures of
scenes where threedimensional objects are being projected onto
planes. See, for example, Overview.