Description:
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A
spherical-face is a topological entity that is a face that is spherical in nature. A face is a topological entity that is a portion of a single geometric surface. A face records its sense relative to its underlying surface (same sense or opposite sense).
spherical-face objects are saved and restored as part of the model.
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Derivation:
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spherical-face : face : entity : scheme-object
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C++ Type:
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FACE->SPHERE
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External Rep:
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#[entity %d %d]
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where the first integer is the entity ID,
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and the second integer is the part ID.
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Example:
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; spherical-face (data type)
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; Create and inquire a spherical-face object.
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(define my_sph (solid:sphere (position 0 0 0) 20))
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;; my_sph
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(define my_faces (entity:faces my_sph))
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;; my_faces
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(face:spherical? (car my_faces))
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;; #t
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