Transformations

Rayshade supports the application of linear transformations to objects and textures. If more than one transformation is specified, the total resulting transformation is computed and applied.

: translate $\overrightarrow{\em {delta}}$
Translate (move) by delta.

: rotate $\overrightarrow{\em {axis}}$ θ
Rotate counter-clockwise about the given axis by θ degrees.

: scale $\overrightarrow{\em {v}}$
Scale by v.

All three scaling components must be non-zero, else degenerate matrices will result.

: transform $\overrightarrow{\em {row1}}$ $\overrightarrow{\em {row2}}$ $\overrightarrow{\em {row3}}$ [ $\overrightarrow{\em {delta}}$ ]
Apply the given 3-by-3 transformation matrix. If given, delta specifies a translation vector.

Transformations should be specified in the order in which they are to be applied immediately following the item to be transformed. For example:

        /*
         * Ellipsoid, rotated cube
         */
        sphere 1. 0 0 0   scale 2. 1. 1. translate 0 0 -2.5
        box 0 0 0 .5 .5 .5
           rotate 0 0 1 45 rotate 1 0 0 45 translate 0 0 2.5

Transformations may also be applied to textures:

   plane 0 0 -4  0 0 1
     texture checker red scale 2 2 2 rotate 0 0 1 45

Note that transformation parameters may be specified using animated expressions, causing the transformations themselves to be animated. See Appendix B for further details.