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### Podział na płaty

Figure XI.1: The pat hes used to render the radiosity s ene of gures XI.2 and XI.3. See olor plate C.13.

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Figure XI.2: A radiosity rendered gure, with at shading. It is evident that this image is based on the pat hes shown in gure XI.1. See olor plate C.14.

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### a

Figure XI.3: A radiosity rendered gure, with smooth shading of illumination. The red olorof the boxis re e tedontothe nearbywalls, givingthema slight reddish hue. This is based on the pat hes shown in gure XI.1. See olor plate C.15.

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### Grafika Komputerowa – p. 11

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Mesh s ene as pat hes Compute form fa tors Solve radiosity equations for B Render with smooth shading

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### .

Pat h P 1 , area A 1 . Pat h P 2 , area A 2 .

Figure XI.5: A large pat h and small pat h.

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### .

P j A j n i n j ' i ' j d

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### .

P i A i P j A j n i n j ' i ' j d

Figure XI.6: Two in nitesimally small pat hes P i

and P j

with areas A i and A . The normals to the pat hesare n and n .

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### optycznego. Hemicube method

P i

P j

FigureXI.7: Proje tiononto ahemi ube.

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### Hemicube method

0 x;y z d = p x 2 +y 2 +1 ' i ' j Pixels on top fa e: z=1. Shows P j

Figure XI.8: A row of pixels along the top of the hemi ube. One pixel shows pat h P

j

. The origin is pla ed at the enter of pat h P i

. The top of the ube is the z =1 plane.

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### Hemicube method

os' i = z=d os' j = 1=d 0 x;y z d = p 1+ y 2 + z 2 ' i x = 1 ' j Shows P j

Figure XI.9: A row of pixels along the x = 1 side of the hemi ube.

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### Visualizer

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