Convex space breakup indicates a process of decomposing the continuous structure of open space into separate convex spaces. Simply find the largest convex space and draw it in, then the next largest, and so on until all the space is accounted for. If visual distinctions are difficult, then the convex spaces may be defined in two stages: first, by using a circle template to find where the largest circles can be drawn in the structure of open space, and second, by expanding each circle to be as large as a space as possible without breaking the convexity rule and without reducing the fatness (approximating a square) of any other space.
Convex space breakup
Hillier, B. & Hanson, J. (1984), The Social Logic of Space, Cambridge University Press: Cambridge. pp.98, 105