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https://github.com/open-goal/jak-project
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water111
78 lines
2.4 KiB
Common Lisp
78 lines
2.4 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: matrix-h.gc
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;; name in dgo: matrix-h
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;; dgos: GAME, ENGINE
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;; A 4x4 matrix, stored in row-major order
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;; some, but not all, functions assume that a matrix is an affine transform.
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;; others assume that the rotation has no scale or shear (and that its inverse is its transpose)
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(deftype matrix (structure)
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((vector vector 4 :inline :offset-assert 0)
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(quad uint128 4 :offset 0)
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(data float 16 :offset 0) ;; moved so the decompiler looks at vector first.
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)
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:method-count-assert 10
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:size-assert #x40
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:flag-assert #xa00000040
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(:methods
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(transform-vectors! (_type_ (inline-array vector) (inline-array vector) int) none 9)
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)
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)
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;; A 3x3 matrix, stored in row-major order.
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;; NOTE: the rows each have an extra 4-bytes of padding
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;; so this is really a 3x4 matrix.
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;; this type is rarely used
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(deftype matrix3 (structure)
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((data float 12 :offset-assert 0)
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(vector vector 3 :inline :offset 0)
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(quad uint128 3 :offset 0)
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)
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:method-count-assert 9
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:size-assert #x30
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:flag-assert #x900000030
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)
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;; a matrix stored using 16-bit integers.
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;; note that these usually have different scaling for the 4th row which
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;; contains the translation in an affine transform.
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;; so you generally should not unpack these to floats without knowing where they came from
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;; and how they were originally packed (for example, in tie/shrub)
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(deftype matrix4h (structure)
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((data int16 16 :offset-assert 0)
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(vector4h vector4h 4 :inline :offset 0)
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(long int64 4 :offset 0)
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)
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:method-count-assert 9
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:size-assert #x20
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:flag-assert #x900000020
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)
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(defun matrix-copy! ((dst matrix) (src matrix))
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"Copy src to dst"
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(let ((v1-0 (-> src vector 0 quad))
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(a2-0 (-> src vector 1 quad))
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(a3-0 (-> src vector 2 quad))
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(a1-1 (-> src vector 3 quad))
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)
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(set! (-> dst vector 0 quad) v1-0)
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(set! (-> dst vector 1 quad) a2-0)
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(set! (-> dst vector 2 quad) a3-0)
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(set! (-> dst vector 3 quad) a1-1)
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)
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dst
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)
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(defmacro new-stack-matrix0 ()
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"Get a new matrix on the stack that's set to zero."
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`(let ((mat (new 'stack-no-clear 'matrix)))
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(set! (-> mat quad 0) (the-as uint128 0))
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(set! (-> mat quad 1) (the-as uint128 0))
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(set! (-> mat quad 2) (the-as uint128 0))
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(set! (-> mat quad 3) (the-as uint128 0))
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mat
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)
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)
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