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Action:
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Crates a law that transforms positions.
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Derivation:
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transform_law_data : base_transform_law_data : law_data : ACIS_OBJECT : -
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Syntax:
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TRANS
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Description:
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The trans law symbol requires that my_law return positions. It produces positions that have been transformed by the my_transf. rotate is used on vectors, while trans is used to transform positions.
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Example:
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; law "TRANS"
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; Create a transform, and then create its inverse.
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(define my_trans_rot (transform:rotation
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(position 0 0 0) (gvector 1 0 0) 90))
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;; my_trans_rot
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; => #[transform 1075284160]
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(define my_trans_move (transform:translation
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(gvector 1 0 0)))
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;; my_trans_move
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; => #[transform 1075284848]
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(define my_t_comp (transform:compose
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my_trans_rot my_trans_move))
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;; my_t_comp
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(define my_law (law "trans(vec(x,y,z),trans1)"
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my_t_comp))
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;; my_law
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; => #[law "TRANS(VEC(X,Y,Z),TRANS1)"]
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; This transforms the given law "VEC(X,Y,Z)" by
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; the supplied transform, my_t_comp
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(law:eval my_law (list 0 0 1))
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;; (1 -1 6.12323399573677e-17)
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; In this example, the input vector is (0, 0, 1).
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; It gets rotated by 90 degrees, causing y to be
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; -1 and then gets moved along x axis by 1.
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; z is approximately zero.
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