[QUE] Why doesn't this draw the polyline?

herodes

I found this example in the Wiki Api documentation pages.

model = Sketchup.active_model
view = model.active_view

point12 = Geom;;Point3d.new 0,0,0
point13 = Geom;;Point3d.new 10,10,10
point14 = Geom;;Point3d.new 20,20,20
point15 = Geom;;Point3d.new 30,30,30

status = view.draw_polyline point12, point13, point14, point15

as it seems the polyline instructed isn't getting drawn.
Is there something I am missing? Anything to watch out for?

Didier Bur

Hi,
Lot of ruby examples are wrong in the docs...
I guess that a polyline must have coplanar points, and these aren't ?

herodes

Hi Didier,

model = Sketchup.active_model
view = model.active_view

# coplanar since z =0 on all these points...
point12 = Geom;;Point3d.new 0,0,0 # z = 0
point13 = Geom;;Point3d.new 10,10,0 # z = 0
point14 = Geom;;Point3d.new 10,20,0 # z = 0
point15 = Geom;;Point3d.new 10,30,0 # z = 0

status = view.draw_polyline point12, point13, point14, point15

I tried this and it stil doesn't work, I also gave inputting an array for argument to the draw_polyline and it gives a Sketchup::View,..
... any other ideas ?

fredo6

[EDIT] after some quick test

view.draw_polyline works fine, but are you sure you execute your code within the drawmethod of a Tool (this is the only place where view.draw methods can work)?

Otherwise, if you want to draw a polyline, you could also use view.draw GL_LINESTRIP, pt1, pt2, ...

If you want to draw segments with each pair of points, use view_draw_lineor view.draw_lines. Very handy to draw in one shot a complex shape that you pre-calculated.