Drawing line based on fed coordinates

jderekito

Hello,
I am somewhat new to SketchUp but am quite excited about the possibilities of it. Here is my question and hopefully someone can help. My goal is to write a ruby script to draw a line between two defined points. I have created a new blank model and drawn a rectangle on the x and y axis. I am testing this by locating one of the the x,y,z coordinates of the rectangle by using the text tool to show the points (e.g. ~ 0.79m, ~ 0.60m, 0.00m). So I just trying to start at that corner and draw a line straight up the Z axis programmatically. However, it is being draw somewhere way closer to the origin of the model around 0.02m, ~ 0.02m, 0.00m. I was hoping someone could point me in the write direction with doing this. Thanks ahead of time.

require 'sketchup.rb'

def draw_simple
pt1 = Geom::Point3d.new(0.79, 0.60, 0.00)
pt2 = Geom::Point3d.new(0.79, 0.60, 1.00)
model = Sketchup.active_model
new_face = model.entities.add_line(pt1, pt2)
new_face.pushpull 10
end #def draw_spacetimepath

UI.menu("PlugIns").add_item("simple") { draw_simple }

Thanks,
Derek

TIG

Units in points, lengths etc always default to SUp's base units, which is "inches": if you want to use metric dimensions use the format 0.79.m or 79.cm or 790.mm etc... Then it'll be as expected...

Also, I see you have a pushpull that needs a face - and a face need at least three [coplanar] edges etc...

jderekito

Thanks TIG,
The defaulting to inches explains it. For now I am just trying to draw a single line. If I just drawing a single line does it still need the face and edges. Thanks again for you assistance as I am still learning my way around SU.

Derek

TIG

@jderekito said:

Thanks TIG,
The defaulting to inches explains it. For now I am just trying to draw a single line. If I just drawing a single line does it still need the face and edges. Thanks again for you assistance as I am still learning my way around SU.

Derek

'Line' and 'Edge' are interchangeable in this context...
A line [edge] is just a line.

edge=entities.add_line(pt1,pt2)

for one line,

edges=add_edges(pt1,pt2,pt3); edge0=edges[0]; edge1=edges[1]

for multiple lines [edges] strung between the list of points - if you use .add_edges you get an array of edges - if there's only one you still need to use edges[0] to find it, if you .add_line you get just the one edge [line].
A face needs at least 3 edges with common vertices. More edges also have to be coplanar.

face=entities.add_face(xxxxx)

takes a 'list/array of points', it then makes new edges with a new face,
or a 'list/array of edges', or a 'closed-curve' - it then makes a new face to these existing edges
So there are several ways:
Make the points and then make the edges and face in one go - probably what you want -

face=entities.add_face(pointsList)

Make the edges from the points and add the face to them - useful if some edges pre-exist -

edges=entities.add_edges(pointsList); face=entities.add_face(edges)

Make the edges and then 'find_faces' that they can have - useful if it's a set of 3D edges -

edges=entities.add_edges(pointsList); edges[0].find_faces

it returns only the number of faces that it's made - if you want to find the face itself then you then need to use

face=edges[0].faces[0]

additionally...