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118 lines
5.4 KiB
Common Lisp
118 lines
5.4 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: math-camera-h.gc
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;; name in dgo: math-camera-h
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;; dgos: GAME, ENGINE
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;; The "math-camera" is responsible for computing the projection matrix used in the renderer
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;; from the position of the in-game camera. It also computes some other common camera info.
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;; See cam-update.gc for how the game camera updates the math-camera.
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;; It also contains some GIF stuff, but these seem to be wrong/unused.
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;; Some of the code here may be extremely old and unused, but this does compute the camera projection
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;; matrix used almost everywhere.
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(deftype vis-gif-tag (structure)
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((fog0 uint32 :offset-assert 0)
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(strip uint32 :offset-assert 4)
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(regs uint32 :offset-assert 8)
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(fan uint32 :offset-assert 12)
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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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(deftype cull-info (structure)
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((x-fact float :offset-assert 0)
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(y-fact float :offset-assert 4)
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(z-fact float :offset-assert 8)
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(cam-radius float :offset-assert 12)
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(cam-x float :offset-assert 16)
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(cam-y float :offset-assert 20)
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(xz-dir-ax float :offset-assert 24)
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(xz-dir-az float :offset-assert 28)
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(xz-dir-bx float :offset-assert 32)
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(xz-dir-bz float :offset-assert 36)
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(xz-cross-ab float :offset-assert 40)
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(yz-dir-ay float :offset-assert 44)
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(yz-dir-az float :offset-assert 48)
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(yz-dir-by float :offset-assert 52)
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(yz-dir-bz float :offset-assert 56)
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(yz-cross-ab float :offset-assert 60)
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)
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:pack-me
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:method-count-assert 9
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:size-assert #x40
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:flag-assert #x900000040
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)
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(deftype math-camera (basic)
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((d meters :offset-assert 4) ;; camera near plane
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(f meters :offset-assert 8) ;; camera far plane
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(fov degrees :offset-assert 12) ;; field of view angle
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;; view frustum
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(x-ratio float :offset-assert 16)
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(y-ratio float :offset-assert 20)
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(x-pix float :offset-assert 24)
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(x-clip float :offset-assert 28)
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(x-clip-ratio-in float :offset-assert 32)
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(x-clip-ratio-over float :offset-assert 36)
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(y-pix float :offset-assert 40)
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(y-clip float :offset-assert 44)
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(y-clip-ratio-in float :offset-assert 48)
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(y-clip-ratio-over float :offset-assert 52)
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(cull-info cull-info :inline :offset-assert 56)
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(fog-start meters :offset-assert 120)
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(fog-end meters :offset-assert 124)
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(fog-max float :offset-assert 128)
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(fog-min float :offset-assert 132)
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(reset int32 :offset-assert 136)
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(smooth-step float :offset-assert 140)
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(smooth-t float :offset-assert 144)
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(perspective matrix :inline :offset-assert 160)
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(isometric matrix :inline :offset-assert 224)
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(sprite-2d matrix :inline :offset-assert 288)
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(sprite-2d-hvdf vector :inline :offset-assert 352)
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(camera-rot matrix :inline :offset-assert 368)
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(inv-camera-rot matrix :inline :offset-assert 432)
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(inv-camera-rot-smooth matrix :inline :offset-assert 496)
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(inv-camera-rot-smooth-from quaternion :inline :offset-assert 560)
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;; this camera-temp is the main matrix used for renderers.
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;; the camera code will set this.
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;; it's designed so the renderers can do a single matrix-vector multiply
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;; and then get fog, clipping, and final vertex position from the result.
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(camera-temp matrix :inline :offset-assert 576)
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(prev-camera-temp matrix :inline :offset-assert 640)
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(hmge-scale vector :inline :offset-assert 704)
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(inv-hmge-scale vector :inline :offset-assert 720)
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(hvdf-off vector :inline :offset-assert 736)
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(guard vector :inline :offset-assert 752)
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(vis-gifs vis-gif-tag 4 :inline :offset-assert 768)
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(vis-gifs-quads uint128 4 :offset 768) ;; added
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(giftex vis-gif-tag :offset 768)
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(gifgr vis-gif-tag :offset 784)
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(giftex-trans vis-gif-tag :offset 800)
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(gifgr-trans vis-gif-tag :offset 816)
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(pfog0 float :offset-assert 832)
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(pfog1 float :offset-assert 836)
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(trans vector :inline :offset-assert 848)
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(plane plane 4 :inline :offset-assert 864)
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(guard-plane plane 4 :inline :offset-assert 928)
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(shrub-mat matrix :inline :offset-assert 992)
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(fov-correction-factor float :offset-assert 1056)
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)
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(:methods
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(new (symbol type) _type_ 0)
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)
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:method-count-assert 9
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:size-assert #x424
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:flag-assert #x900000424
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)
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(define-extern *math-camera* math-camera)
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