Before you read Part 2, make sure you have checked out Part 1 here:
http://help.covetool.com/how-tos/using-grasshopper-plug-in-1

To begin exporting geometry create Breps for the following pills, “roof surfaces, floor surfaces, skylight surfaces, opaque wall surfaces, and window surfaces.” Create Breps by double clicking the grasshopper plane and typing “Brep” (aka Boundary Representation) to create a new pill. Each export is unique and the following will explore tips and challenges for each step. 

  1. Building Height: import geometry by right clicking the building height pill and selecting the “Set one Line” prompt. Jumping back to your Rhino model, from the lowest point of your model begin a line and continue the line vertically-locked to the highest point in your model. The measurement will be automatically recorded and once the “LockSolver” is unselected in the grasshopper plane, the information will be updated in your cove.tool project summary.
  2. Roof Surfaces: Using a new Brep pill, right click the Brep and select the “Set Multiple Breps” prompt. Back in Rhino, select the single surface objects that best illustrate the combined surface area that entails your projects entire roof surface area. This includes all areas that are exterior and cap the areas below them. Once all selected, back in grasshopper connect the Brep pill to the roof surface pill with a wire to complete import.
  3. Floor Surfaces: Repeat the same steps in roof surfaces for floor surfaces with a new Brep. However you modeled your projects floors (with thickness, or not) the only surfaces you should select are planes which best illustrate the combined floor surface area or your entire project. Be warry of selecting multiple surfaces on the same plane, as they might log multiple measurements for the same area collected and getting a combined floor area calculation way out of proportion.
  4. Skylight Surfaces: Repeat the same steps in roof surfaces for skylight surfaces with a new Brep. Not all projects have skylights, so it is ok to leave this category empty by not creating/connecting a Brep. This may give you an error prompt in the grasshopper code, but will not affect the rest of the data exports, so there is no need to worry about this. 
  5. Opaque Wall Surface: Repeat the same steps in roof surfaces for opaque wall surfaces with a new Brep. Because cove.tool is an energy modeling software the only surface areas we need data from are areas in which Heat Transfer occurs. Meaning we only need information from the project floors and exterior. Thus when selecting walls for the cove.tool plug-in, only exterior walls should be selected, everything interior is unnecessary for the types of energy analysis and results cove.tool will generate. If you have a project that has Fins or Overhangs in its current stage of design, those do not need to be exported as they have their own page to fill-in in the cove.tool app. 
  6. Window Surfaces: Repeat the same steps in roof surfaces for window surfaces with a new Brep. Similar to Opaque wall surfaces, the window surface selection only pertains to areas on the exterior face of the project, interior windows are not necessary for the energy analysis. Also mullions would in theory be included in the window selection process and not in the wall surface category, however because of their general size they tend to be minimal blimps in the energy simulation results and because this tool is for early-stage energy modeling, mullions that a are not considered fins or overhangs are not necessary to export to cove.tool.

Once all Breps are completed and lines connected, Unlock the LockSolver and Jump to the cove.tool web app to see your results. 

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