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https://github.com/open-goal/jak-project
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water111
142 lines
4.4 KiB
Common Lisp
142 lines
4.4 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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;; name: collide-mesh-h.gc
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;; name in dgo: collide-mesh-h
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;; dgos: GAME, ENGINE
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;; The collide-mesh system is used for _moving_ meshes, like a platform.
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;; It's not used for the full level (that's collide-frag-mesh)
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;;;;;;;;;;;;;;;;;;;;
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;; result
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;;;;;;;;;;;;;;;;;;;;
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;; The triangle involved in collision
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;; Note: this is reused for the background collision system.
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(deftype collide-tri-result (structure)
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((vertex vector 3 :inline :offset-assert 0)
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(intersect vector :inline :offset-assert 48)
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(normal vector :inline :offset-assert 64)
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(pat pat-surface :offset-assert 80)
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)
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:method-count-assert 9
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:size-assert #x54
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:flag-assert #x900000054
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)
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;;;;;;;;;;;;;;;;;;;;
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;; static mesh data
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;;;;;;;;;;;;;;;;;;;;
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;; A triangle, part of a foreground collision mesh.
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;; The vertex indices index into the collide-mesh vertex-data array.
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;; Due to using uint8's you only get 256 vertices.
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(deftype collide-mesh-tri (structure)
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((vertex-index uint8 3 :offset-assert 0)
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(unused uint8 :offset-assert 3)
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(pat pat-surface :offset-assert 4)
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)
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:pack-me
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:method-count-assert 9
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:size-assert #x8
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:flag-assert #x900000008
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)
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(declare-type collide-mesh-cache-tri structure)
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;; A collision mesh. Note that's it's bound to a specific joint.
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(deftype collide-mesh (basic)
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((joint-id int32 :offset-assert 4)
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(num-tris uint32 :offset-assert 8)
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(num-verts uint32 :offset-assert 12)
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(vertex-data (inline-array vector) :offset-assert 16)
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(tris collide-mesh-tri 1 :inline :offset 32)
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)
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:method-count-assert 16
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:size-assert #x28
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:flag-assert #x1000000028
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(:methods
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(debug-draw-tris (_type_ process-drawable int) none 9)
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(overlap-test (_type_ collide-mesh-cache-tri vector) symbol 10)
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(should-push-away-test (_type_ collide-mesh-cache-tri collide-tri-result vector float) float 11) ;; spat
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(sphere-on-platform-test (_type_ collide-mesh-cache-tri collide-tri-result vector float) float 12) ;; sopt
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(populate-cache! (_type_ collide-mesh-cache-tri matrix) none 13)
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(collide-mesh-math-1 (_type_ object object) none 14)
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(collide-mesh-math-2 (_type_ object object object) none 15)
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)
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)
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;;;;;;;;;;;;;;;;;;;;
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;; cache
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;;;;;;;;;;;;;;;;;;;;
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;; this is not the main collide cache, but instead a smaller cache for unpacking and
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;; transforming foreground meshes. It's not useful when filling/probing the real collide-cache,
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;; but is useful for the "loop through all the things that aren't me and see if I collide"
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(defconstant COLLIDE_MESH_CACHE_SIZE #xa000)
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(deftype collide-mesh-cache (basic)
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((used-size uint32 :offset-assert 4)
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(max-size uint32 :offset-assert 8)
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(id uint64 :offset-assert 16)
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(data uint8 #xa000 :offset 32)
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)
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:method-count-assert 12
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:size-assert #xa020
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:flag-assert #xc0000a020
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(:methods
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(allocate! (_type_ int) int 9)
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(is-id? (_type_ int) symbol 10)
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(next-id! (_type_) uint 11)
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)
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)
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(defmethod next-id! collide-mesh-cache ((obj collide-mesh-cache))
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"Reset all used entries in the cache and increment the id.
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If the id is zero, set it to 1"
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;; ld v1, 12(a0)
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(let ((v1 (-> obj id)))
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;; sw r0, 0(a0)
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(set! (-> obj used-size) 0)
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;; daddiu v0, v1, 1
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(let ((v0 (+ v1 1)))
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;; beql v0, r0, L3
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;; addiu v0, r0, 1 (only taken if v0 = 0)
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(if (= v0 0)
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(set! v0 (the uint 1))
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)
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;; L3:
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;; sd v0, 12(a0)
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(set! (-> obj id) v0)
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v0
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)
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)
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)
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(defmethod is-id? collide-mesh-cache ((obj collide-mesh-cache) (arg0 int))
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"Is this our id?"
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(= (-> obj id) arg0)
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)
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;; possibly this is stored in the data of the collide-mesh-cache
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(deftype collide-mesh-cache-tri (structure)
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((vertex vector 3 :inline :offset-assert 0)
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(normal vector :inline :offset-assert 48)
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(bbox4w bounding-box4w :inline :offset-assert 64)
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(pat pat-surface :offset 60)
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)
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:method-count-assert 9
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:size-assert #x60
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:flag-assert #x900000060
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)
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;; only allocate if we don't have an existing one.
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(define-perm *collide-mesh-cache* collide-mesh-cache (new 'global 'collide-mesh-cache))
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;; in all cases, re-init.
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(set! (-> *collide-mesh-cache* id) 1)
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(set! (-> *collide-mesh-cache* used-size) 0)
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(set! (-> *collide-mesh-cache* max-size) COLLIDE_MESH_CACHE_SIZE)
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