Hello
I can draw a line from a program:
line({0,0},{5,5});
But I cannot find the correct syntax to draw a circle by giving coordinates of the center and the radius. I tried all kind of syntaxes I could imagine with no success. Manual did not help me more.
Help much appreciated.
Kind regards.
ARC(G,x,y,r,a1,a2,c)
or
ARC_P (G,x,y,r,a1,a2,c)
Page 538 in Edition 1, July 2013, User Guide.
TomC
Note: radius (r) is always in pixels, regardless of whether ARC or ARC_P is used. So if you are using the Cartesian version of ARC, convert the radius first.
I recommend just using ARC_P and work with pixels.
I believe the conversion formulas are:
X point to pixel: integer((x - Xmin)/(Xmax - Xmin)) * 318
Y point to pixel: integer((y - Ymax)/(Ymin -Ymax)) * 218
Also you can use the C>PX command in the catalog. C>PX(x,y) returns the list {x pixel, y pixel}.
Bonjour Thomas
Why does the command "circle()" not be used?
It was the command I was trying to use. I am confused.
Many thanks for you answer. Kind regards.
elle n'existe pas, tu dois utiliser ARC_P
Because "circle" implies that you are drawing a complete circle exclusively. ARC can draw curved arcs between 0<x<2pi angular values.
TW
Mic
in fact, I was using the line() command of the Geometry App in a program, which works fine as soon as you use the following syntax:
line({x1,y1},{x2,y2})
But for an unknown reason, trying to use a similar syntax on the circle() command of the Geometry App in a program does not work. For instance, here is a syntax I tried:
circle({x1,y1},{x2,y2})
I thought this would draw a circle where x1,y1 and x2,y2 would be the coordinates of two end points of a diameter.
Kind regards.