SHADOW FROM POINT

SHADOW FROM POINT

The shadow from point A on any surface P is the intersection point of the light beam S passing through this point with the surface P.

SHADOW FROM POINT ON PROJECTION PLANE

The shadow from point A on the plane of projections is the trace on this plane of the light beam S passing through point A ( A _t   - shadow from point A on the plane of projections; And _{t 1} - the horizontal projection of the shadow of the point A ; And _{m 2} - frontal projection of the shadow of point A ).

Shadowing point A on the projection plane using the model.

The shadows from the points on the upper field P ₂ and on the front field P ₁ are called real shadows ( А _Т , В _Т ). The shadows from the points on the bottom field P ₂ and on the back field P ₁ are called imaginary ( false ) shadows ( A ' _T , B' _T ).