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https://github.com/open-goal/jak-project
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water111
637990314b
Closes #736 --------- Co-authored-by: Hat Kid <6624576+Hat-Kid@users.noreply.github.com>
271 lines
11 KiB
Common Lisp
271 lines
11 KiB
Common Lisp
;;-*-Lisp-*-
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(in-package goal)
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(bundles "ENGINE.CGO" "GAME.CGO")
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(require "engine/entity/res.gc")
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(require "kernel/gstate.gc")
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(require "engine/entity/entity-h.gc")
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(require "engine/game/game-h.gc")
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;; The exact details of actor-link-h are not yet understood, but this system caches lookups for entities/process.
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;; Some entities may reference other entities. This is done with an element in a res-lump/entity that contains
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;; named lists (possibly of size 1) of other entities. These lists may store entities by a name, or by an
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;; actor id (AID).
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;; This process is slow: it involves going from a process, to its entity, to doing a lookup, deciding if you have an AID/string,
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;; then looking up the other actor by name, or AID. Lookup by name is extremely slow, as it involves checking each actor's name
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;; per every actor in every level. Lookup by aid isn't bad, but is still a binary search through all actors.
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;; The next-actor and prev-actor res build a linked list of actors.
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;; DECOMP BEGINS
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Initial Lookup Functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; these functions find actors before we've built the links.
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(defun entity-actor-lookup ((lump res-lump) (name symbol) (idx int))
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"Given an entity (the res-lump), look up a reference to another entity and return that entity."
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(let* ((sv-16 (new 'static 'res-tag))
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(v1-1 (res-lump-data lump name (pointer uint32) :tag-ptr (& sv-16))))
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(the-as entity-actor
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;; check in range, and lookup succesful
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(when (and v1-1 (< idx (the-as int (-> sv-16 elt-count))))
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;; pick between string and aid lookup.
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(if (= (-> sv-16 elt-type) string)
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(entity-by-name (-> (the-as (pointer string) v1-1) idx))
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(entity-by-aid (-> (the-as (pointer uint32) v1-1) idx)))))))
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(defun entity-actor-count ((res res-lump) (name symbol))
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"Get the number of entities that this res references under the name.
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This works on more than just next/prev."
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(let ((tag (new 'static 'res-tag)))
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(if (res-lump-data res name pointer :tag-ptr (& tag)) (the-as int (-> tag elt-count)) 0)))
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;; entity-actors are part of a linked list of entities.
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;; these prevent you from looking up next-actor, prev-actor again and again to iterate.
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;; The actor-link-info for an entity is stored in that res-lump's "extra"
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;; of course, this only works for cases where each entity has at most 1 process.
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;; These are allocated on the process heap of the entity's process.
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(deftype actor-link-info (basic)
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((process process)
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(next entity-actor)
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(prev entity-actor))
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(:methods
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(new (symbol type process) _type_)
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(get-matching-actor-type-mask (_type_ type) int)
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(actor-count-before (_type_) int)
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(link-to-next-and-prev-actor (_type_) entity-actor)
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(get-next (_type_) entity-actor)
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(get-prev (_type_) entity-actor)
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(get-next-process (_type_) process)
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(get-prev-process (_type_) process)
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(apply-function-forward (_type_ (function entity-actor object object) object) int)
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(apply-function-reverse (_type_ (function entity-actor object object) object) int)
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(apply-all (_type_ (function entity-actor object object) object) int)
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(send-to-all (_type_ symbol) none)
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(send-to-all-after (_type_ symbol) object)
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(send-to-all-before (_type_ symbol) object)
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(send-to-next-and-prev (_type_ symbol) none)
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(send-to-next (_type_ symbol) none)
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(send-to-prev (_type_ symbol) none)
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(actor-count (_type_) int)))
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;;;;;;;;;;;;;;;;
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;; Link Setup
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;;;;;;;;;;;;;;;;
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(defmethod next-actor ((this entity-actor))
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"Utility function to look up the next actor in the list, assuming we don't have actor-link-info yet."
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(declare (inline))
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;; look up reference to next-actor - this is slow.
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(entity-actor-lookup this 'next-actor 0))
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(defmethod prev-actor ((this entity-actor))
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"Look up previous actor in the list"
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(declare (inline))
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(entity-actor-lookup this 'prev-actor 0))
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(defmethod new actor-link-info ((allocation symbol) (type-to-make type) (proc process))
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"Set up an actor-link-info for the given process. The entity of this process should be the entity-actor
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that will get this actor-link-info"
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(let ((this (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
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(set! (-> this process) proc)
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;; set next and prev
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(set! (-> this next) (next-actor (-> proc entity)))
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(set! (-> this prev) (prev-actor (-> proc entity)))
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this))
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;;;;;;;;;;;;;;;;;;;;
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;; Access
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;;;;;;;;;;;;;;;;;;;;
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;; These methods can now be used to get next/prev more efficiently, without having to do a res lookup.
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(defmethod get-next ((this actor-link-info))
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(-> this next))
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(defmethod get-prev ((this actor-link-info))
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(-> this prev))
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(defmethod get-next-process ((this actor-link-info))
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"Get the process for the next, if it exists."
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;; we can't easily get to the actor-link-info of the next, so we have to grab it from entity-links.
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(the-as process (and (-> this next) (-> this next extra process))))
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(defmethod get-prev-process ((this actor-link-info))
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"Get the process for the prev, if it exists"
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(the-as process (and (-> this prev) (-> this prev extra process))))
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(defmethod link-to-next-and-prev-actor ((this actor-link-info))
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"Redo the linking in the constructor by looking up the next/prev actor."
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(set! (-> this next) (next-actor (-> this process entity)))
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(set! (-> this prev) (prev-actor (-> this process entity)))
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(-> this next))
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(defmethod apply-function-forward ((this actor-link-info) (arg0 (function entity-actor object object)) (arg1 object))
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"Iterate forward through actors, and apply this function. Starts at (-> this next)
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If the function returns truthy, stop iterating."
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(let ((s3-0 (-> this next))) (while s3-0 (if (arg0 s3-0 arg1) (return (the-as int #f))) (set! s3-0 (next-actor s3-0))))
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0)
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(defmethod apply-function-reverse ((this actor-link-info) (arg0 (function entity-actor object object)) (arg1 object))
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"Iterate backward through actors and apply function.
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If the function returns truth, stop iterating."
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(let ((s3-0 (-> this prev))) (while s3-0 (if (arg0 s3-0 arg1) (return (the-as int #f))) (set! s3-0 (prev-actor s3-0))))
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0)
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(defmethod apply-all ((this actor-link-info) (arg0 (function entity-actor object object)) (arg1 object))
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"Apply to all entities. Starts at the back and hits everyone, including this object."
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;; start at us (next may give us #f here, so can't do that.)
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(let ((s4-0 (-> this process entity)))
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;; while there is a prev...
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(while (prev-actor s4-0)
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;; set prev (this is stupid, they do the slow lookup twice!)
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(set! s4-0 (prev-actor s4-0)))
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;; now iterate forward.
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(while s4-0
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(if (arg0 s4-0 arg1) (return (the-as int #f)))
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(set! s4-0 (next-actor s4-0))))
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0)
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(defmethod send-to-all-after ((this actor-link-info) (message symbol))
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"Send an event to all processes after this link with no parameters."
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(let ((iter (-> this next))
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(result (the object #f)))
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(while iter
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(let ((proc (-> iter extra process)))
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(when proc
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(set! result (or (send-event proc message) result)))
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(set! iter (next-actor iter))))
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result))
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(defmethod send-to-all-before ((this actor-link-info) (message symbol))
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"Send an event to all processes before this link with no parameters."
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(let ((iter (-> this prev))
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(result (the object #f)))
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(while iter
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(let ((proc (-> iter extra process)))
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(when proc
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(set! result (or (send-event proc message) result)))
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(set! iter (prev-actor iter))))
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result))
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(defmethod send-to-next ((this actor-link-info) (message symbol))
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"Send event arg0 to the next actor's process"
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(let ((a0-1 (-> this next)))
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;; do we have a next?
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(when a0-1
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;; get the actual process
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(let ((a0-2 (-> a0-1 extra process)))
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;; do we have a process?
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(when a0-2
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(send-event a0-2 message)))))
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(none))
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(defmethod send-to-prev ((this actor-link-info) (message symbol))
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"Send event arg1 to the next actor's process."
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(let ((a0-1 (-> this prev))) (when a0-1 (let ((a0-2 (-> a0-1 extra process))) (when a0-2 (send-event a0-2 message)))))
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(none))
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(defmethod send-to-next-and-prev ((this actor-link-info) (msg symbol))
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"Send an event to both next and prev with no params."
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(send-to-next this msg)
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(send-to-prev this msg)
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(none))
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(defmethod send-to-all ((this actor-link-info) (msg symbol))
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(send-to-all-after this msg)
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(send-to-all-before this msg)
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(none))
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(defmethod actor-count ((this actor-link-info))
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"Count the number of actors in the entire list"
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(let ((actor (-> this process entity))
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(count 0))
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;; get back to the beginning.
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(while (prev-actor actor)
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(set! actor (prev-actor actor)))
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;; iterate and set the count
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(while actor
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(+! count 1)
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(set! actor (next-actor actor)))
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count))
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(defmethod get-matching-actor-type-mask ((this actor-link-info) (matching-type type))
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"Iterate through _all_ actors that are part of this actor list.
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If the nth actor is type matching-type, then set the nth bit of the result."
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(let ((actor (the-as entity-actor (-> this process entity)))
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(mask 0))
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(let ((current-bit 1))
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;; seek to beginning
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(while (prev-actor actor)
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(set! actor (prev-actor actor)))
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;; loop over actors
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(while actor
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;; if we match, set the bit
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(if (= (-> actor etype) matching-type) (set! mask (logior mask current-bit)))
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;; next
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(set! actor (next-actor actor))
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;; next bit
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(set! current-bit (ash current-bit 1))))
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mask))
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(defmethod actor-count-before ((this actor-link-info))
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"Get the number of actors _before_ this actor in the list."
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(let* ((this-actor (-> this process entity))
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(actor this-actor)
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(count 0))
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;; go to beginning (why not count here???)
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(while (prev-actor actor)
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(set! actor (prev-actor actor)))
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;; go forward, until we hit this actor
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(while (!= actor this-actor)
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(+! count 1)
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(set! actor (next-actor actor)))
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count))
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(defun actor-link-subtask-complete-hook ((arg0 entity-actor) (arg1 (pointer symbol)))
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"Sets arg1 if the thing is complete. Does not continue the apply if the complete perm is set."
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(cond
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((logtest? (-> arg0 extra perm status) (entity-perm-status complete)) (set! (-> arg1 0) #t) #f)
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(else (set! (-> arg1 0) #f) #t)))
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(defun actor-link-dead-hook ((arg0 entity-actor) (arg1 (pointer symbol)))
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"Sets arg1 is the thing is dead. Does not continue the apply if the dead perm is set."
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(cond
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((logtest? (-> arg0 extra perm status) (entity-perm-status dead)) (set! (-> arg1 0) #t) #f)
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(else (set! (-> arg1 0) #f) #t)))
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(defun alt-actor-list-subtask-incomplete-count ((arg0 process-drawable))
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"Get the number of alt-actors which do not have the complete bit set in their perm."
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(let ((alt-actor-count (entity-actor-count (the-as res-lump (-> arg0 entity)) 'alt-actor))
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(incomplete-count 0))
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;; iterate over all alt actors
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(dotimes (alt-actor-idx alt-actor-count)
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;; look up the alt actor
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(let ((a0-3 (entity-actor-lookup (the-as res-lump (-> arg0 entity)) 'alt-actor alt-actor-idx)))
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(if (or (not a0-3) (zero? (logand (-> a0-3 extra perm status) (entity-perm-status complete)))) (+! incomplete-count 1))))
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incomplete-count))
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