Rotate an environment by code

Rhino Developer
1

Hello,

I would like to rotate an environment through Z-Axis in order to avoid the user having to rotate all objects, so anyone know if RhinoCommon provides any way to do that?

Thanks.

Kind regards.

2

I’m not quite sure what you mean by “environment.” Can you explain further what you are trying to do and why?

3

Hi Dale,

I mean reflection environment for rendering, here you are a video showing how to do it in design time, environment.mp4 (892.2 KB) but I’m not able to find the way to do that programatically.

Thanks and Regards.

4

@andy, @johnc, do you have an example of how you would do this using C++ and the RDK?

5

Thanks Dale,

Could you show me an example in C#?

Thanks and Regards

6

The video shows that you actually want to rotate the local mapping of a HDR texture that happens to be attached as the child of an environment. In C++ you can do this using CRhRdkTexture::SetRotation(). To give more details would require me to know what object you already have access to (a Basic Environment?). I have no idea how you would do this in C# though.

7

No idea if this is the right way to do it, but it seems to work over here with the current environment:

import Rhino

def ZRotateCurrentEnvironment(deg=0.0):
    tex = Rhino.Render.RenderEnvironment.CurrentEnvironment.FindChild("Texture")
    context = Rhino.Render.RenderContent.ChangeContexts.UI
    tex.SetRotation(Rhino.Geometry.Vector3d(0.0, 0.0, deg), context)

if __name__=="__main__":
    ZRotateCurrentEnvironment(15.0)

While trying this out, my rhino crashed once, so make shure to save your work before testing.

c.

1 Like
8

I’m not sure how null is handled here, but if ‘tex’ comes back as null because the child wasn’t found, it could crash. If it was C++ it would definitely crash without a null check.

9

@johnc,

you are right. Python just prints an error in this case. Below some Python code for completeness to handle the case when no environment texture has been assigned:

import Rhino

def ZRotateCurrentEnvironment(deg=0.0):
    
    # get current environment
    env = Rhino.Render.RenderEnvironment.CurrentEnvironment
    if not env: return None
    
    # get environment texture
    tex = env.FindChild("Texture")
    if not tex: return None
    
    # rotate environment
    context = Rhino.Render.RenderContent.ChangeContexts.UI
    tex.SetRotation(Rhino.Geometry.Vector3d(0.0, 0.0, deg), context)
    print "Current rotation = {}".format(tex.GetRotation().Z)

if __name__=="__main__":
    ZRotateCurrentEnvironment(90)

c.