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x1 = (GetGadgetAttribute(Canvas_0, #PB_Canvas_MouseX) / pw) * pw
y1 = (GetGadgetAttribute(Canvas_0, #PB_Canvas_MouseY) / ph) * ph

These two lines of code capture the mouse position that will be used to draw back to the origin (x,y). The division and multiplication is used to round off to the ...

The following code does not produce a vector line, or anything on the canvas. Foŕthe life of me I don't know what I'm doing wrong. Any insights?

Procedure VectorLine(color,x,y,pw,ph,brush_width)
If StartVectorDrawing(CanvasVectorOutput(Canvas_0))
Repeat
x1 = (GetGadgetAttribute(Canvas_0, #PB ...