On 09/05/15 16:52, Richmond wrote:
On 21/03/15 18:17, Jim Hurley wrote:
Richmond,
I wrote this Turtle Graphics library in the dark ages of RR, before
“sum” became a reserved word.
So, comment out the “sum” handler in the stack script.
Jim
Having copied your stack script across into my stack I am stuck with 2
problems:
1. How to make the line to show as 'pd' [penDown] doesn't seem to work.
2. How to exchange your graphic "turtleGraphic" for an img.
In all other respects the thing is super!
Richmond.
Actually my "big" problem at the moment is, with this script:
on right dangl
rt dangl
end right
on rt dangl
subtract dangl from angl
drawTurtle
end rt
on drawTurtle
myWait waitTime
if noDraw then exit drawturtle
put 5 into distance
put round(x0 +x)&comma& round(-y+y0) & return into gPoints
put distance * cos(radPerDeg * angl) into dx
put dx into fld "dx"
put distance * sin(radPerDeg * angl) into dy
put dy into fld "dy"
put round(x+x0+dx)&comma&round(-y+y0-dy) after gPoints
set points of graphic "turtleGraphic" to gPoints
set the angle of img "turt" to ((the angle of img "turt") - angl)
end drawTurtle
with the graphic "turtleGraphic" and the img "turt" initially pointing
in the same direction,
why they don't go on pointing in the same direction everytime I send
"right 45" via the message box?
Richmond.
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