All geometry in perspective view disappears when I have line | plane

Grasshopper
1

Hi,

I am currently having an issue with grasshopper where the line | plane intersection component is causing all geometry to disappear from my perspective view.

image
image1539×696 53.9 KB

The component in question:
bug line plane.gh (4.0 KB)
I believe it might be an issue where the lines are parallel to the plane.
If I disable the component, the geometry reappears.

With the problematic component disabled:


With the problematic component enabled:

2

Another user reporting the same issue:

3

Is the intersection between the line and the plane really far away?

4

Unfortunately the line plane is parallel to the plane or close to it. It either results in null or a very large t value.

5

Yeah I’ve noticed before that sometimes geometry really far away causes the display to go haywire. I can’t remember whether the 4View command fixed it or not.

If this is still happening in Rhino 7 we’ll need to look into it and fix it.

6

This is Rhino 7 beta:

image
image1817×550 93.7 KB

With the intersection component disabled:

image
image1820×549 93.7 KB

1 Like
8

I’m currently replacing the line plane intersection component with the following python script so that I can view my work in the meantime.

ndotu = x.Direction*y.Normal
if abs(ndotu) > 0.01:
    w = x.From - y.Origin
    si = -y.Normal.Multiply(y.Normal, w) / ndotu
    a = si
    b = w + si * x.Direction + y.Origin
else:
    a = None
    b = None

based on:

1 Like