Hello, looking to see if anyone has any example CGA scripts or strategies for dealing with irregularly shaped parcels.
I have a few examples where I have a simple CGA rule applied to static lot shapes that show the different setback areas and a build area using innerRectangle(). All of the lots shown would be low density residential with single detached homes.
The following examples have been included:
| Example A Pie shaped lot | The build area (green) is being generated towards the rear of the lot (orange) instead of towards the front (red). |
| Example B - Reverse Pie Shaped Lot | The build area (green) is in an acceptable position, but no rear setback (orange) has been generated. |
| Example C - Triangular Shaped Lot | The build area (green) is in an acceptable position, but only a single side setback (blue) has been generated and the generated rear setback (orange) does not meet the rear property line definition in the bylaw I am working with. |
| Example D - Rear Property Line Definition | This example shows the wording for the rear property line definition and provides and example of the rear setback (orange) i am hoping to achieve through CGA. |
Ideally I am looking to see if it is possible to use CGA to:
- Have the build area shape (green) generated from innerRectangle() always be adjacent and parallel to the front setback (red).
- Is innerRectangle() the best operation to use for my use case?
- Would I be better off inserting primitive shapes to generate required building masses?
- Any other thoughts or suggestions are welcome!
- Generate a pseudo rear property line that is used to generate the rear setback based on the rear setback definition provided in Example D.
For reference, here is the CGA script I am using on the shapes:
version "2025.0"
Lot -->
setback (3) {street.front = Front | remainder :
setback (7.5) {street.back = Back | remainder :
setback (1.2) {street.left = Side | remainder :
setback (1.2) {street.right = Side | remainder :
buildArea}}}}
buildArea -->
innerRectangle(scope) {shape : FinalBuildArea | remainder = Color}
FinalBuildArea -->
color("#37BC7D") # Green
Front -->
color("#E7180B") # Red
Back -->
color("#FFB93B") # Orange
Side -->
color("#155DFC") # Blue
Color -->
color(0.75,0.75,0.75)
