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15-20 Programming
FREEZE Halts the program, freezing the current display. Execution
resumes when any key is pressed.
LINE Draws a line from (x1, y1) to (x2, y2).
LINEx1;y1;x2;y2
PIXOFF Turns off the pixel at the specified coordinates (x,y).
PIXOFF x;y
PIXON Turns on the pixel at the specified coordinates (x,y).
PIXON x;y
TLINE Toggles the pixels along the line from (x1, y1) to (x2, y2) on
and off. Any pixel that was turned off, is turned on; any pixel
that was turned on, is turned off. TLINE can be used to erase
a line.
TLINE x1;y1;x2;y2
Example
TLINE 0;0;3;3
Erases previously drawn 45 degree line from (0,0) to
(3,3), or draws that line if it doesn’t already exist.
Graphic commands
The Graphic commands use the graphics variables G0 through
G9—or the Page variable from Sketch—as graphicname
arguments. The position argument takes the form (x,y).
Position coordinates depend on the current aplet's scale,
which is specified by Xmin, Xmax, Ymin, and Ymax. The
upper left corner of the target graphic (graphic2) is at
(Xmin,Ymax).
You can capture the current display and store it in G0 by
simultaneously pressing >21@+>3/27@.
DISPLAY→ Stores the current display in graphicname.
DISPLAY→ graphicname
→DISPLAY Displays graphic from graphicname in the display.
→DISPLAY graphicname