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89 lines
2.6 KiB
Common Lisp
89 lines
2.6 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: transform.gc
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;; name in dgo: transform
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;; dgos: GAME, ENGINE
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(defmethod print transform ((obj transform))
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(format #t "#<transform @ #x~X~%" obj)
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(format #t "~T~Ttrans:~F ~F ~F ~F ~%"
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(-> obj trans data 0)
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(-> obj trans data 1)
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(-> obj trans data 2)
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(-> obj trans data 3)
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)
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(format #t "~T~Trot: ~F ~F ~F ~F ~%"
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(-> obj rot data 0)
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(-> obj rot data 1)
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(-> obj rot data 2)
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(-> obj rot data 3)
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)
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(format #t "~T~Tscale:~F ~F ~F ~F>"
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(-> obj scale data 0)
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(-> obj scale data 1)
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(-> obj scale data 2)
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(-> obj scale data 3)
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)
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obj
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)
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(defmethod new trs ((allocation symbol) (type-to-make type))
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"Create a new trs and set it equal to identity."
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(let ((obj (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
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(set! (-> obj trans data 3) 1.0)
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(set! (-> obj rot data 3) 1.0)
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(vector-identity! (-> obj scale))
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obj
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)
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)
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(defun transform-matrix-calc! ((tf transform) (dst-mat matrix))
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"Convert a transform to a matrix. This is not particularly efficient."
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(let ((s4-0 (new-stack-matrix0))
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(s3-0 (new-stack-matrix0))
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)
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;; start with identity
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(matrix-identity! dst-mat)
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;; set translation (which also sets identity...)
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(matrix-translate! dst-mat (-> tf trans))
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;; rotate y axis (this is first, so yaw is "world aligned"
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(matrix-rotate-y! s4-0 (-> tf rot data 1))
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(matrix*! s3-0 s4-0 dst-mat)
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;; rotate x axis
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(matrix-rotate-x! s4-0 (-> tf rot data 0))
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(matrix*! dst-mat s4-0 s3-0)
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;; rotate z axis
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(matrix-rotate-z! s4-0 (-> tf rot data 2))
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(matrix*! s3-0 s4-0 dst-mat)
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;; apply scale
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(matrix-scale! s4-0 (-> tf scale))
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)
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)
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(defun transform-matrix-parent-calc! ((tf transform) (dst-mat matrix) (inv-scale vector))
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"Convert a transform to a matrix, applying an inverse scaling."
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(let ((s4-0 (new-stack-matrix0))
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(s3-0 (new-stack-matrix0))
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)
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(matrix-identity! s3-0)
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(matrix-translate! s3-0 (-> tf trans))
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(matrix-inv-scale! s4-0 inv-scale)
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(matrix*! dst-mat s4-0 s3-0)
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(matrix-rotate-y! s4-0 (-> tf rot data 1))
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(matrix*! s3-0 s4-0 dst-mat)
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(matrix-rotate-x! s4-0 (-> tf rot data 0))
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(matrix*! dst-mat s4-0 s3-0)
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(matrix-rotate-z! s4-0 (-> tf rot data 2))
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(matrix*! s3-0 s4-0 dst-mat)
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(matrix-scale! s4-0 (-> tf scale))
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(matrix*! dst-mat s4-0 s3-0)
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)
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)
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(defun trs-matrix-calc! ((tf trs) (dst-mat matrix))
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"Convert a trs to a matrix"
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;; this relies on the fact that trs and transform both have the same memory layout.
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(transform-matrix-calc! (the-as transform (-> tf trans)) dst-mat)
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)
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