HTML and CSS Reference

In-Depth Information

Step 4: Add matrix helpers to simplify matrix interaction.

For
gd.core.draw()
you'd normally have to write some extremely complex logic to

handle matrices for colors and shapes. Instead, you're going to use some prewritten help-

ers for modelview (
http://3dengine.org/Modelview_matrix
)
, perspective (
http://mng.bz/

VitL
)
, and identity matrices (
http://en.wikipedia.org/wiki/Identity_matrix
)
. Append
listing

an unknown source, but you'll find that Mozilla's WebGL tutorials, Learning WebGL, and

many other online lessons make use of it.

4
“Matrix multiplication,” Wikipedia, last modified April 8, 2013,
http://mng.bz/yo4D
.

5
“Translation (geometry),” Wikipedia, last modified Feb. 21, 2013,
http://mng.bz/2dbB
.