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# Answer to Question #45213 in Geometry for issak

Question #45213
hello

i have many objects with known centre of mass coordinates distributed on a plane.
the objects have 2 main shapes (cudic and cylindrical).

i previously calculated the distance between there centres of mass to detect if they intersect 2 by 2.

now all what i need is to know which object is visible to the others so i can calculate the view factor
related to each object with respect to only the visible onces.

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Issak Sdu
28.08.14, 14:34

Thanks for the reply, but the problem is more complicated:

Actually I want detect these four situations:

1- Cubic Object1 is not seen by cylindrical Object2 because there is a cubic Object3 between them
2- Facet1 of cubic Object1 is fully seen by only facet2 of cubic Object3
3- Object1 is partially seen by cylindrical Object4 because Object4 is higher than Object2 and Object3 which are between Object1 and Object4
4- Facet1 of cubic Object3 is seen by two facets of cubic Object4