jak-project/goal_src/engine/nav/path-h.gc

;;-*-Lisp-*-
(in-package goal)

;; name: path-h.gc
;; name in dgo: path-h
;; dgos: GAME, ENGINE

(defenum path-control-flag
  :bitfield #t
  :type uint32
  (display 0)
  (draw-line 1) ;; TODO - only seen it used to control debug drawing so far
  (draw-point 2) ;; TODO - only seen it used to control debug drawing so far
  (draw-text 3) ;; TODO - only seen it used to control debug drawing so far
  (not-found 4)
  )

;; A path-control is a curve that can be loaded from res-lump/entities.
(deftype path-control (basic)
  ((flags      path-control-flag          :offset-assert 4)
   (name       symbol                     :offset-assert 8)
   (process    process-drawable           :offset-assert 12)
   (curve      curve              :inline :offset-assert 16)
   (num-cverts int32                      :offset 20)
   (cverts     (inline-array vector)      :score 100 :offset 16)
   )
  :method-count-assert 21
  :size-assert         #x24
  :flag-assert         #x1500000024
  (:methods
    (new (symbol type process symbol float) _type_)
    (dummy-9 (_type_) none 9)
    (eval-path-curve-div! (_type_ vector float symbol) vector 10)
    (get-random-point (_type_ vector) vector 11)
    (TODO-RENAME-12 (_type_ vector float) vector 12)
    (eval-path-curve! (_type_ vector float symbol) vector 13)
    (TODO-RENAME-14 (_type_ vector float) vector 14)
    (length-as-float (_type_) float 15)
    (path-distance (_type_) float 16)
    (get-num-verts (_type_) int 17)
    (should-display? (_type_) symbol 18)
    (TODO-RENAME-19 (_type_) float 19)
    (TODO-RENAME-20 (_type_) float 20)
    )
  )

;; A curve-control is very similar, but also gets knots.
(deftype curve-control (path-control)
  ()
  :method-count-assert 21
  :size-assert         #x24
  :flag-assert         #x1500000024
  (:methods
   (new (symbol type process symbol float) _type_ 0)
   )
  )

(defmethod new path-control ((allocation symbol) (type-to-make type) (proc process) (name symbol) (time float))
  (local-vars (tag res-tag))
  (let ((obj (object-new allocation type-to-make (the-as int (-> type-to-make size)))))

    (when (zero? obj)
      ;; allocation failed.
      (go process-drawable-art-error "memory")
      (set! obj (the-as path-control 0))
      (goto cfg-9)
      )

    (set! (-> obj process) (the-as process-drawable proc))
    (set! (-> obj name) name)
    (let ((ent (-> proc entity)))
      (when (= name 'path)
        ;; if we are a path, try to look up the path-actor.
        (let ((lookup-entity (entity-actor-lookup (the-as res-lump ent) 'path-actor 0)))
          (if lookup-entity
              (set! ent lookup-entity)
              )
          )
        )

      ;; look up the curve data
      (set! tag (new 'static 'res-tag))
      (let ((data (res-lump-data ent name pointer :tag-ptr (& tag) :time time)))
        (cond
          (data
           ;; success, we got some data
           (set! (-> obj cverts) (the-as (inline-array vector) data))
           (set! (-> obj curve num-cverts) (the-as int (-> tag elt-count)))
           )
          (else
           ;; did not find the data. Set flags and zero stuff
           (logior! (-> obj flags) (path-control-flag not-found))
           (set! (-> obj cverts) (the-as (inline-array vector) #f))
           (set! (-> obj curve num-cverts) 0)
           )
          )
        )
      )
    (label cfg-9)
    (the-as path-control obj)
    )
  )

(defmethod should-display? path-control ((obj path-control))
  "Should we display path marks?"
  (and *display-path-marks*
       (logtest? (-> obj flags) (path-control-flag display))
       )
  )

(defmethod length-as-float path-control ((obj path-control))
  "Get the number of edges as a float"
  (the float (+ (-> obj curve num-cverts) -1))
  )

(defmethod get-num-verts path-control ((obj path-control))
  "Get the number of vertices"
  (-> obj curve num-cverts)
  )

(defmethod new curve-control ((allocation symbol) (type-to-make type) (proc process) (name symbol) (time float))
  (let ((obj (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (set! (-> obj process) (the-as process-drawable proc))
    (set! (-> obj name) name)
    (let* ((ent (the-as entity (-> proc entity)))
           (v1-2 name)
           (s2-0 (cond
                   ((= v1-2 'path)
                    'path-k ;; for knots?
                    )
                   (else
                    ;; appends a -k to the symbol name.
                    (let ((s2-1 string->symbol))
                      (format (clear *temp-string*) "~A-k" name)
                      (s2-1 *temp-string*)
                      )
                    )
                   )
             )
           )
      (let ((lookup-entity (entity-actor-lookup ent 'path-actor 0)))
        (if lookup-entity
            (set! ent lookup-entity)
            )
        )
      (when (not (get-curve-data! ent (-> obj curve) name s2-0 time))
        (cond
          ((> (-> obj curve num-cverts) 0)
           ;; downgrade us to a path-control, we got cverts but no knots.
           (set! (-> obj type) path-control)
           )
          (else
           ;; couldn't get anything, mark as bad.
           (logior! (-> obj flags) (path-control-flag not-found)) 
           (set! (-> obj flags) (logior (-> obj flags) (path-control-flag not-found)))
           (set! (-> obj curve cverts) (the-as (inline-array vector) #f))
           (set! (-> obj curve num-cverts) 0)
           )
          )
        )
      )
    obj
    )
  )