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36 lines
1 KiB
Common Lisp
36 lines
1 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: quaternion-h.gc
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;; name in dgo: quaternion-h
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;; dgos: GAME, ENGINE
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(deftype quaternion (structure)
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((x float :offset-assert 0)
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(y float :offset-assert 4)
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(z float :offset-assert 8)
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(w float :offset-assert 12)
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(data float 4 :score -9999 :offset 0)
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(vec vector :inline :offset 0)
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(quad uint128 :offset 0)
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)
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:method-count-assert 9
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:size-assert #x10
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:flag-assert #x900000010
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)
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(define *unity-quaternion* (new 'static 'quaternion :x 0.0 :y 0.0 :z 0.0 :w 1.0))
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(define-extern matrix->quaternion (function quaternion matrix quaternion))
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(define-extern vector-y-angle (function vector float))
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(defmacro new-stack-quaternion0 ()
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"Get a stack quaternion that's set to 0.
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This is more efficient than (new 'stack 'quaternion) because
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this doesn't call the constructor."
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`(let ((q (new 'stack-no-clear 'quaternion)))
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(set! (-> q quad) (the-as uint128 0))
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q
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)
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)
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