GRASS - Programming language

GRASS is a programming language created in 1977.

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GRASS (GRAphics Symbiosis System) is a programming language created to script 2D vector graphics animations. GRASS was similar to BASIC in syntax, but added numerous instructions for specifying 2D object animation, including scaling, translation, rotation and color changes over time. It quickly became a hit with the artistic community who were experimenting with the new medium of computer graphics, and is most famous for its use by Larry Cuba to create the original "attacking the Death Star will not be easy" animation in Star Wars (1977). Read more on Wikipedia...

GRASS Wikipedia page
GRASS first developed in Ohio State University
GRASS on HOPL
See also: (4 related languages)BASIC, OpenGL, C, True BASIC
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Example from Wikipedia:

SINCURVE=[PROMPT "WHAT IS THE OFFSET?"
INPUT OFFSET
x=-160
angle=0
POINT OFFSET+x,SIN(angle)*80,3
angle=angle+2
IF (x=x+1)<159,SKIP -2]

Books about GRASS from ISBNdb

title	authors	year	publisher
Open Source Gis: A Grass Gis Approach (kluwer International Series In Engineering & Computer Science)	Markus Neteler and Helena Mitasova	2002	Springer
Open Source GIS: A GRASS GIS Approach	Neteler, Markus and Mitasova, Helena	2010	Springer