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https://github.com/open-goal/jak-project
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water111
c235280b91
* [decomp] clean up files 50-100 * update file, fix crash on too many prims * spelling is hard
56 lines
1.8 KiB
Common Lisp
56 lines
1.8 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: draw-node-h.gc
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;; name in dgo: draw-node-h
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;; dgos: GAME, ENGINE
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;; A "draw-node" is a way to group together a bunch of drawables (possibly other draw-nodes) in a BVH
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;; This BVH is used for sphere-in-view culling and the broad phase collision detection.
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;; _most_ uses of draw-node are in a special tree with these properties:
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;; - between 1 and 8 roots.
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;; - each child has between 1 and 8 children
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;; - all leaves are stored at the same depth
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;; - all nodes and leaves have visibility IDs
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;; shrub does not have these properties - it supports arbitrary children counts, leaves
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;; may occur at any depth, and nothing has visibility ids.
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(deftype draw-node (drawable)
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((child-count uint8 :offset 6) ;; if our child requires a count
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(flags uint8 :offset 7) ;; is our children leaf or draw-node?
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(child drawable :offset 8) ;; can be draw-node or any other drawable
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(distance float :offset 12) ;; used in shrub...
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)
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:method-count-assert 18
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:size-assert #x20
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:flag-assert #x1200000020
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;; field distance is a float printed as hex?
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)
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;; for non-shrub uses of draw-node, this is used to store all the draw-nodes at a given depth.
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(deftype drawable-inline-array-node (drawable-inline-array)
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((data draw-node 1 :inline)
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(pad uint32)
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)
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:method-count-assert 18
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:size-assert #x44
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:flag-assert #x1200000044
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;; too many basic blocks
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(:methods
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)
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)
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;; the types of these fields are a guess for now.
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;; used for draw-node-cull function
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(deftype draw-node-dma (structure)
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((banka draw-node 32 :inline :offset-assert 0)
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(bankb draw-node 32 :inline :offset-assert 1024)
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)
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:method-count-assert 9
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:size-assert #x800
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:flag-assert #x900000800
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)
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