algorithmic modeling for Rhino


Ladybug + Honeybee

Ladybug and Honeybee are two open source environmental plugins for Grasshopper to help designers create an environmentally-conscious architectural design.

Installation Instructions

Download Ladybug and Honeybee

Remove Old Version

Ladybug PrimerHoneybee Primer

Example Files for Ladybug

Example Files for Honeybee

Ladybug on GitHub

Honeybee on GitHub

Use this Reference for your Publications.

Licensed under @license GPL-3.0+

Read more here

Members: 879
Latest Activity: 2 hours ago


What is Ladybug?

Ladybug is an open source environmental plugin for Grasshopper3D that helps architects and engineers create an environmentally-conscious architectural design.  Ladybug imports standard EnergyPlus Weather files (.EPW) into Grasshopper and provides a variety of 3D interactive graphics to support the decision-making process during the initial stages of design.

What is Honeybee?

Honeybee connects Grasshopper3D to EnergyPlus, Radiance, Daysim and OpenStudio for building energy and daylighting simulation.The Honeybee project intends to make many of the features of these simulation tools available in a parametric way.

You can get started by watching this video:

Here are four separate playlist:

Want to see a full presentation?

Check out this presentation or watch it: Part1Part 2

And this video here:

Discussion Forum

Reduce opacity for skydome.

Hi, is it possible to reduce the opacity of the  skydome .i.e make the sky dome translucent so that one can see the building geometry inside ?Continue

Started by Sarith 2 hours ago.



Started by moka mahmoud 2 hours ago.

Mirror Material 2 Replies

Hi everyone,I'm trying to model a Light Shelf in HoneyBee, but when i apply the preset material (Honeybee Radiance Mirror Material) it has no effect on the scene: essentially it doesn't reflect the…Continue

Started by Alessandro Corso. Last reply by Alessandro Corso 2 hours ago.

“ladybug and honeybee” and “archsim” difference 1 Reply

Hi every one;I want to know about the differences between ladybug&honeybee and archsim but I didn’t any thing In my search…does anyone know about it?Continue

Started by Davood. Last reply by Chris Mackey 4 hours ago.

Ladybug Tweets

Comment Wall


You need to be a member of Ladybug + Honeybee to add comments!

Comment by mohammad on November 17, 2015 at 2:41pm

Hi Chris

thanks for your comprehensive answer,

I'll try them to find appropriate solution.


Comment by Chris Mackey on November 17, 2015 at 10:02am


You can absolutely simulate this type of comfort to varying degrees of accuracy depending on what you are trying to assess.  However, if this is an outdoor bazaar, I would caution against using the PMV model, which was developed by putting subjects into climate chambers and has been proven to only be a good indication of comfort in tightly conditioned buildings.  This is not to say that you could not calculate PMV comfort if you want but I would recommend using Universal Thermal Climate Index (UTCI) instead if outdoor conditions.

You can start simply by plugging the weather data into the outdoor comfort calculator:

If you need both a high spatial and temporal resolution, you can use an energy simulation to build up maps of outdoor temperature like so:

If you want to get really detailed, you can also account for the temperature of the ground when shaded/exposed to sun:

If you have further questions, please open a discussion.


Comment by mohammad on November 17, 2015 at 6:30am

A “bazaar” is a marketplace or assemblage of shops. I want simulate thermal comfort of this type of building and compare it with measure data(Temperature,relative humidity, PMV). Image of “bazaar” :
ladybug+honeybee can help me simulate those data in bazaar?
Best regards

Comment by Francesco De Luca on November 17, 2015 at 1:38am

Hello Abraham,

ok I will as soon as possible. Not I open two new discussions more urgent. 



Comment by Abraham Yezioro on November 16, 2015 at 11:33am
Hi Francesco,
Just happen to test this during the last week. Works fine for me.
Maybe you should open a discussion attaching the file in question.
Comment by Francesco De Luca on November 16, 2015 at 6:40am


just noticed maybe an issue with the Daylight Simulation component of Honeybee. The Daylight Factor analysis doesn't work using a custom _workingDir but it works fine with the default directory C:\Ladybug. So far I used the component Daylight Simulation with annual simulations and it always worked fine using a custom _workingDir.

Comment by Chris Mackey on November 15, 2015 at 2:51pm


Yes, it is a surface normal issue.  When you use "glazing based on ratio" on a single surface, it assumes that the surface is facing outward of the zone in order to determine whether it is facing N/S/E/W.  When you use "glazing based on ratio" on a zone, you never have this problem because all surfaces automatically face outward from a solid closed polysurface.  In your case, however, your starting HBSrfs are facing inward to the zone:

So just flip the surfaces before you put them into the component or use "galzing by ratio" on the zone instead of your surfaces.


Comment by Sawjam on November 15, 2015 at 11:08am

Hi Mostapha

Yes +Y appears to be reversed? See attached file

See attached file, top line below the insects :-) requesting south glazing appears on North wall.(what I believe to be north wall)


Comment by Mostapha Sadeghipour Roudsari on November 15, 2015 at 7:50am

Hi Sawjam. I'm not sure if I understand the problem. Do you mean that Honeybee does not assume +Y as north? Can you upload a simple example?

Comment by Sawjam on November 14, 2015 at 8:49pm


Honeybee_Glazing Parameters List VER 0.0.58\nNOV_07_2015

The North and south is incorrect for me, I'm using a southern hemisphere weather file, but at the point of use it hasn't been defined?  Is this a surface normal issue?

Great work much appreciated. thx


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