Looking for a way to change the radius of a circle using Python in Rhino6. Rhino Common Ok to use. Thanks.
Eric
3 posts - 2 participants
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Change radius of circle
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Different results when calculating curve offsets
Hey there,
so i stumbled again upon this strange behaviour in RhinoCommon using Python and i`m wondering where it is originating from.
When offsetting the same curve with Curve.Offset or Curve.OffsetNormalToSurface the results are different on a suprisingly big scale. The underlyling surface is not really complex. Can somebody explain to me what is happening and if there is a fix ?
Attached i’m sending you the script and the geometry.
CurveOffset_Sample.3dm (95.9 KB) Curveoffsets_3ax.py (3.0 KB)
Thanks
Patrick
1 post - 1 participant
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Expected Point, got Point
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Creating a processing-like Animation class in RhinoPython
I have posted an example on GitHub for creating a processing-like animation using RhinoPython, which is lighter than using Grasshopper’s timers and makes the code more maintainable because the animation is complete in RhinoPython.
Since rhinoscriptsyntax bakes objects into scriptcontext, it is too heavy for animation. So I answered the need to use the Dynamic Draw methods in DisplayPipeline Class of RhinoCommon. This may be a sample that you may not have expected to find. Please give it a try.
1 post - 1 participant
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Help - macro toggle between two commands
Hi, i’ve never scripted anything in rhino, but i would like to know if there is a way for me to create a macro that alternate between two commands e.g. 2 display mode or align the gumball to world/object
3 posts - 2 participants
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3d DLA question(Diffusion Limited Aggregation)
Hi all,
I’m here with another DLA related question, I am trying to now generate a DLAsystem using ghPython, previously I learned how to do it in 2d and now im trying to create it in 3d, I followed an example and have gotten to this far, but I could not figure out what is the problem now. for example, when the Run is set to Ture, I get the error message that states " ExpireSolution() takes exactly 2 arguments(1 given)", why is that? isn’t it only take one bool argument?
How do i get the particles to stick?
your answer would be much appreciated!
Thank you!!
question screen shot|690x326
DLA.gh (49.5 KB)
3 posts - 2 participants
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Draw point with Rhino.Display.DisplayPipeline.DrawDot() in RhinoPython?
Hi,
Does somebody have an example on how to draw a Rhino.Geometry.Point3d() with Rhino.Display.DisplayPipeline.DrawDot() in RhinoPython?
Am I right in the assumption that this method just draws a dot with a shader?
Thanks.
1 post - 1 participant
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Expiresolusion error
Hi,
I am trying to use the Expiresolution() in Ghpython, however, i get this message: ExpireSolution() takes exactly 2 arguments(1 given). However, when i look at the documentation, it says it takes in one bool value, if im not mistaken, also, I saw examples online that one bool value seem sufficient what went wrong? can someone help?
Thank you so much!
4 posts - 2 participants
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Make2d set output layers
Hi,
is there a way to script make2d command with defining output layers in Rhino 7, in way like in Rhino 5?
in rhino 5 I was using
rs.Command(" -Make2D DrawingLayout=CurrentCplan "
+"ShowTangentEdges=Yes "
+"CreateHiddenLines=Yes "
+"MaintainSourceLayers=No "
+'VisibleLineLayer "CON visible" '
+'VisibleTangentsLayer "CON visible tan" '
+'HiddenLineLayer "CON hidden" '
+'HiddenTangentsLayer "CON hidden tan" '
+'AnnotationLineLayer "CON annotation" Enter ',
False)
I managed to script all except the output layers…
command = "-_Make2D _Layout=CPlane _Properties=ByOutputLayers _CreateHiddenLines=Yes _ShowTangents=Yes _GroupOutput=No Enter Enter"
rs.Command(command, False)
I could loop through the output curves and change their layer, but is there a direct way?
Thanks in advance,
Aleksandar
1 post - 1 participant
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Rhino 7 behaving slower?
Rhino 7 looks for me like it is behaving slower with Grasshopper Python and C#
I do not know if it is a problem with my computer or what ? but I wonder if someone else feels the same ? could someone test this Gh script with a nested for loop and let me know. I am afraid I did something wrong? But Rhino and Gh crash or take too much time to update each time I move a slider! How could I fix this? thanks in advance!
GridPoints-PointAttractor-PythonToC#.gh (17.4 KB)
1 post - 1 participant
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How to run a *.cs script?
i’ve got a script i found that is an *.cs file, the syntax looks like rhino but i’ve never medded with c scripts before.
thank you
3 posts - 2 participants
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Error with rs.OffsetCurve (rhino5)
I am trying to script offset of simple closed shapes (rectangles and concave shapes with no crossing lines nor any interior voids).
rs.OffsetCurve will fail for some parameters when my understanding of geometry and the manipulation says it should work.
rectangles work correctly: e.g. rectangle (100,100 - 500,500)
vector 0,0,0 offset= 75 = outside
vector 0,0,0 offset= -75 = inside
for a convex shape (like an outlined U or rectangle as above with hole rectangle (200,200 -400, 500) so these points:
100,100,0
500,100,0
500,500,0
400,500,0
400,150,0
150,150,0
150,500,0
100,500,0
100,100,0
vector [0,0,0] offset = 20 = outside
vector [0,0,0] offset = -20 ERROR (Thinnest portion is 50 wide, so 20 inset should leave 10mm space and be valid).
using curvecentroid[rhino with offset.3dm|attachment]
[0,0,0] offset = -20
ac = rs.CurveAreaCentroid(newcurve)
offCurve = rs.OffsetCurve( newcurve, ac[0], -offsetnum )
works but is still outside. it should be inside. It will work properly, if i manually select a point say(450,200) that is inside shape, but farther from edge than the offset amount. This is hard to generalize to make a program.
my understanding of vector from the vague description (after experiments) is that for offset >0, that the nearest curve point moves closer and then the rest of the curve is on that side of original curve. Is that reasonably correct?
How can I programmatically offset inside and outside for concave and convex shapes?
Sample code and rhino file attached.
- for toolpath, select the object on ‘toolpath’ layer
- for shape use any line on ‘shape-u’ layer
rhino with offset.3dm (115.5 KB)
offset test.py (2.4 KB)
1 post - 1 participant
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PolyCurve Segments
Hi,
I believe a PolyCurve can be made up of different line types, like straight lines and arcs? If this is true is there a way to gain access to each segment to control, for example, the end points of line or the radius and center point of an arc. I understand that if the curve is converted to a Polyline one does have access to the points. Problem is polylines with arcs have many points around the arcs.
Here is a screen shot where I have marked the points of a polyline. You can see the arc problem when converted to a polyline.
Any help with this would be appreciated.
8 posts - 2 participants
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GetObject can´t select only curves
Hi,
I try to select only curves with a GetObject( ) using GeometryFilter = ObjectType.Curve but the edges of a mesh are included in at the possibilities os selection.
How can I select only Curves?
Thanks
5 posts - 3 participants
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rs.GetPoints() method - in_plane option is 'too constrained'
The optional argument currently accepts only a Boolean value to constrain the points to the active CPlane (True) or not. Methinks this is too limited - instead of a binary yes/no answer, why can’t this input be a plane - any plane - and not just an option to use the active CPlane or not. It would add a lot to the flexibility of the method.
I think the code could be modified to accommodate this without breaking existing scripts…
Current excerpt:
if in_plane:
gp.ConstrainToConstructionPlane(True)
plane = scriptcontext.doc.Views.ActiveView.ActiveViewport.ConstructionPlane()
gp.Constrain(plane, False)
Maybe could be:
if in_plane:
if isinstance(in_plane,Rhino.Geometry.Plane):
gp.ConstrainToConstructionPlane(False)
plane=in_plane
else:
gp.ConstrainToConstructionPlane(True)
plane = scriptcontext.doc.Views.ActiveView.ActiveViewport.ConstructionPlane()
gp.Constrain(plane, False)
Or something like that…
1 post - 1 participant
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Nurbs to mesh in python
Hi,
I have a few Nurbs generated with rs.AddSphere in my python script and I wanted to convert them into meshes within the script. However, it does appear there is a rhinoscriptsyntax MeshToNurbs command but not the opposite NurbsToMesh.
The only work around I thought was to use the grasshopper component MeshSphere, see code below, however the spheres do not seem to appear after generated, and for example I can’t change their colour. Should I do some baking somehow?
Any alternative way to convert a nurbs to a mesh (without sampling it and running a tesselation) you can think of?
import ghpythonlib.components as comps
sp1 = rs.AddSphere(pt, 2) #not needed if I use the component below
sp = comps.MeshSphere(pt,2,3,3)
rs.ObjectColor(sp, color)
Error message: Message: iteration over non-sequence of type Mesh
4 posts - 3 participants
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Rhino.MaterialColor to RGB values?
Hi,
I have a problem to read rgb values in Rhinoscript as Rhino.MaterialColor returns something like this:
11908533
That’s supposed to be grey… How to decode it to r / g / b values?
… I solved this as mentioned in later posting… But is there a way to determine MaterialTexture size in RhinoScript?
3 posts - 2 participants
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Please help me to exit While Loop in python when I press the enter key
I want to know how to exit While Loop when I press the enter key.
I want to do a specific action until I press Enter.
Please give me a simple example.
The code I tested.
import rhinoscriptsyntax as rs
while True:
rs.Command(’_circle’)
n = input('enter : ')
if n == ‘’:
break;
2 posts - 2 participants
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Merge Point Clouds (IronPython)
Good evening! Although not necessarily evening
I recently wrote a small script for point clouds, check it out!
Merge.py (656 Bytes)
@Petras_Vestartas, take a look, please!
3 posts - 2 participants
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Click Limit on Long Option List
Is there limits that come with long option lists on GetString, GetLiteralString or Get ?
For example, with the following list you can select the option by using the letter or by clicking on the option until you try to click on the last three. On these you can only select them by typing in the letter. If I add more options then the new options are not clickable. It is like a string limitation is being hit by the click event in some way. It also seems inconsistent between GetLiteralString and Get. I can repeat this behavior on GetLiteralString. On Get this behavior is a bit more erratic.
Best;
Steve
1 post - 1 participant
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