Changeset 33306 in project

Timestamp:

04/25/16 04:26:44 (5 years ago)

Author:

acharlton

Message:

wiki/linden-scheme Update to 0.2.0

File:

• wiki/eggref/4/linden-scheme (modified) (3 diffs)

wiki/eggref/4/linden-scheme

@@ -115 +115 @@
 
 ==== Turtle graphics
-linden-scheme provides a set of functions (often also render rules) that implement the standard turtle-graphics commands typically associated with graphical L-systems. These commands are intended to be a standard foundation for turtle graphics, but do not provide any graphical output mechanism themselves. Rather, they provide a convenient parameter for holding some sort of rendering target, as well as a set of procedures that are used to modify and access the usual geometric qualities: namely translation/rotation matrices and thickness. Two state variables are therefore defined for the turtle graphics system: {{transform-matrix}} and {{thickness}}, although facilities are provided so they do not need to be accessed through {{get-state}} or {{set-state}}.
+linden-scheme provides a set of functions (often also render rules) that implement the standard turtle-graphics commands typically associated with graphical L-systems. These commands are intended to be a standard foundation for turtle graphics, but do not provide any graphical output mechanism themselves. Rather, they provide a convenient parameter for holding some sort of rendering target, as well as a set of procedures that are used to modify and access the usual geometric qualities: namely translation/rotation matrices and thickness. Two state variables are therefore defined for the turtle graphics system: {{transform-matrix}}, {{rotation-matrix}}, and {{thickness}}, although facilities are provided so they do not need to be accessed through {{get-state}} or {{set-state}}.
 
 <parameter> render-target</parameter>
@@ -124 +124 @@
 
 Returns the current transformation matrix, as modified by calls to {{pitch}}, {{roll}}, {{turn}}, {{move}}, and {{move-forward}}.
+
+<procedure> (rotation-matrix)</procedure>
+
+Returns the rotation component of the current transformation matrix, as modified by calls to {{pitch}}, {{roll}}, and {{turn}}.
 
 <procedure> (pitch ANGLE)</procedure>
@@ -202 +206 @@
 === Version history
 
+==== Version 0.2.0
+24 April 2016
+
+* Add {{rotation-matrix}}
+
+
 ==== Version 0.1.0
 * Initial release