PSET - DualBrain/bsharp Wiki
To display a point at a specified place on the screen during use of the graphics mode.
(x,y) represents the coordinates of the point.
color is the color of the point.
Coordinates can be given in either absolute or relative form.
(absolute x, absolute y) is more common and refers directly to a point without regard to the last point referenced. For example:
STEP (x offset, y offset) is a point relative to the most recent point referenced. For example:
Coordinate values can be beyond the edge of the screen. However, values outside the integer range (-32768 to 32767) cause an "Overflow" error.
(0,0) is always the upper-left corner and (0,199) is the lower-left corner in both high resolution and medium resolution.
If the value for color is greater than 3, an "Illegal function call" error is returned.
The following draws a diagonal line from (0,0) to (100,100).
10 CLS 20 SCREEN 1 30 FOR I=0 TO 100 40 PSET (I,I) 50 NEXT 60 LOCATE 14,1
The following clears out the line by setting each pixel to 0.
40 FOR I=100 TO 0 STEP -1 50 PSET(I,I),0 60 NEXT I