How to trace a virtual line from one point to the first object it meets

Developers Ruby API
1

Hello, I have an object and I already detected its corners coordinates. And I need from one of the lowest corner to trace a virtual line until I get to the floor, in my case it will be a face from an entity collection.
Here are some screens, hope it helps to understand me:

Screenshot_1
Screenshot_1613Ă—845 162 KB
Screenshot_2
Screenshot_21058Ă—852 266 KB

So I need somehow to determine coordinates of that floor or just the distance from corner to first entity it collides if we go down on Z-axis. How it could be done, can someone help me to understand?)
Thanks in advance!

2

Model#raytest-instance_method

3

Does not tested, just an idea:

model = Sketchup.active_model
point = detected_corners_coordinates
virtual_line = Z_AXIS.reverse
face =  will_be_a_face_from_an_entity_collection
ray = [ point, virtual_line ]
item = model.raytest(ray, true)                                
if item && item[1].last == face
  determined_coordinates_of_that_floor = item[0]
  just_the_distance = point.discance determined_coordinates_of_that_floor 
end

Insteed of
if item && item[1].last == face
could be used:
if item && item[1].include?(face)

1 Like
4

Read the SketchUp tutorial on Guides (guidelines). I use a guide as a “virtual” line for what you’re wanting to do.
Guides are not actual lines; they display as dashed lines. When a guide hits an entity it creates an intersection that is findable.
There numerous ways to use it; think of guides as reference lines. You draw the guide, then measure it’s length.
Definetly read the SketchUp help page for Guides.

5

It will work if you do it manually. This topic is in [Developers] [Ruby API] category. :wink:

6

Thank you, I modified it a bit for my needs and this approach worked!

1 Like