Hard Shadow vs Soft Shadowpoint sourceareasourceumbraumbrapenumbra
Hard Shadow vs Soft Shadow Shadow vs Soft Shadow point source area source umbra penumbra umbra
Hard Shadow vs Soft Shadow
Hard Shadow vs Soft Shadow Shadow vs Soft Shadow
Planar(平面的）Shadow. What is planar shadow?- A simple case of shadow when objects castshadows on planar surfaces.- Now, we will present two algorithms forplanar shadows
Planar(平面的) Shadow ) Shadow • What is planar shadow? – A simple case of shadow when objects cast shadows on planar surfaces. – Now, we will present two algorithms for planar shadows planar shadows
Planar(平面的）Shadow·Projection Shadows- In this case, the three-dimensional object isrendered second times. A matrix could bederived that projects the vertices of an objectonto a plane. Consider the situation in thefigure (next page), where the light source islocated at l, the vertex to be projected is at yand the projected vertex is at p
Planar(平面的) Shadow ) Shadow • Projection Shadows – In this case, the three-dimensional object is rendered second times. A matrix could be derived that projects the vertices of an object onto a plane. Consider the situation in the onto a plane. Consider the situation in the figure (next page), where the light source is l td t ocated at l, th t t b j t d i t the vertex to be projected is at v, and the projected vertex is at p
Planar（平面的）Shadow.Projection Shadows-Further suppose the receiver1=(l,l,12)plane is y=0 (this could alsobe generalized to work withany planes)pV=0
Planar(平面的) Shadow ) Shadow • Projection Shadows – Further suppose the receiver plane is y=0 (this could also l=(lx,ly,lz) p y ( be generalized to work with any planes) y any planes) v p y=0