We are an Architecture and Urban Design firm in Sydney. We are looking for a tool / functionality that can measure the percentage of sunlight falling on the surface of an object.
We do a fair bit of building envelope modelling for feasibility studies, and large scale urban projects. We are looking for a tool that can specifically tell us the percentage of a surface, or a collection of surfaces on those envelopes that receive 2 hours of sunlight at different times of the year in Sydney. (measuring one date of the year at a time)
The tool would need to be able to graphically demonstrate the results as a "heat map" or otherwise, but specifically give us the percentage of selected surfaces receiving 2 hours. We would need the model to be able to calculate the overshadowing of adjacent envelopes, but give us specific info in individual surfaces, as well as an aggregated whole of all surfaces selected.
We are prepared to spend some money to get the right tool to do the job, and prepared to look at software packages outside of Vectorworks if need be. The only thing that would be particularly useful to us is if the tool worked on a Mac. We keep everything up to date OS + VW are the latest on all machines.
Attached is some imagery of similar tools we are aware of in alternative CAD packages, and some manual modeling that we have prepared for previous projects.