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

;; name: sparticle.gc
;; name in dgo: sparticle
;; dgos: GAME, ENGINE


;; This file contains the interface between sparticle and sprite as well as the actual particle updates.

;;;;;;;;;;;;;;;;;;;;;;;
;; basic methods
;;;;;;;;;;;;;;;;;;;;;;;

(defmethod print sparticle-cpuinfo ((obj sparticle-cpuinfo))
  (format #t "<sparticle-cpuinfo>~%")
  (dotimes (s5-0 16)
    (format #t "~D:~F~%" s5-0 (the-as float (-> obj data s5-0)))
    )
  (format #t "TIMER:~D~%" (-> obj timer))
  (the-as sparticle-cpuinfo (format #t "FLAGS:~X~%" (-> obj flags)))
  )

(defun sp-particle-copy! ((arg0 sparticle-cpuinfo) (arg1 sparticle-cpuinfo))
  "copy some of the particle state."
  (let ((v1-1 (-> arg1 sprite x-y-z-sx quad)))
    (set! (-> arg0 sprite x-y-z-sx quad) v1-1)
    )
  (let ((v1-3 (-> arg1 sprite flag-rot-sy quad)))
    (set! (-> arg0 sprite flag-rot-sy quad) v1-3)
    )
  (let ((v1-5 (-> arg1 sprite color quad)))
    (set! (-> arg0 sprite color quad) v1-5)
    )
  (dotimes (v1-6 10)
    (set! (-> arg0 adgif prims v1-6) (-> arg1 adgif prims v1-6))
    )
  (set! (-> arg0 vel-sxvel quad) (-> arg1 vel-sxvel quad))
  (set! (-> arg0 rot-syvel quad) (-> arg1 rot-syvel quad))
  (set! (-> arg0 fade quad) (-> arg1 fade quad))
  (set! (-> arg0 acc quad) (-> arg1 acc quad))
  (set! (-> arg0 friction) (-> arg1 friction))
  (set! (-> arg0 timer) (-> arg1 timer))
  (set! (-> arg0 flags) (-> arg1 flags))
  (set! (-> arg0 user-float) (-> arg1 user-float))
  (set! (-> arg0 func) (-> arg1 func))
  (none)
  )

(defmethod new sparticle-system
  ((allocation symbol)
   (type-to-make type)
   (arg0 int)
   (arg1 int)
   (arg2 symbol)
   (arg3 pointer)
   (arg4 (inline-array adgif-shader))
   )
  "allocate a particle system.
  arg0: number of group0's
  arg1: number of group1's
  arg2: is 3d?
  arg3: pointer to sprite allocations
  arg4: pointer to adgif allocation"
  (#when PC_BIG_MEMORY
    (*! arg0 16) ;; 16x more particles!
    (*! arg1 16) ;; 16x more particles!
    )
  (let ((gp-0 (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (let* ((v1-3 (/ (+ arg0 63) 64)) ;; num blocks
           (a0-2 (/ (+ arg1 63) 64))
           (a1-2 (* v1-3 64))        ;; length
           (a2-2 (* a0-2 64))
           (s2-1 (+ v1-3 a0-2))      ;; total blocks
           (s5-1 (+ a1-2 a2-2))      ;; total length
           )
      (set! (-> gp-0 blocks 0) v1-3)
      (set! (-> gp-0 length 0) a1-2)
      (set! (-> gp-0 num-alloc 0) 0)
      (set! (-> gp-0 blocks 1) a0-2)
      (set! (-> gp-0 length 1) a2-2)
      (set! (-> gp-0 num-alloc 1) 0)
      (set! (-> gp-0 is-3d) arg2)
      ;; per block
      (set! (-> gp-0 alloc-table) (the-as (pointer uint64) (malloc 'global (* s2-1 8))))
      ;; per particle
      (set! (-> gp-0 cpuinfo-table) (the-as (inline-array sparticle-cpuinfo) (malloc 'global (* 144 s5-1))))
      ;; sprite data
      (set! (-> gp-0 vecdata-table) arg3)
      ;; adgifs
      (set! (-> gp-0 adgifdata-table) arg4)
      (dotimes (v1-5 s2-1)
        (set! (-> gp-0 alloc-table v1-5) (the-as uint -1))
        )
      (dotimes (s4-1 s5-1)
        (set! (-> gp-0 cpuinfo-table s4-1 valid) #f)
        ;; link cpuinfos to sprite data
        (set! (-> gp-0 cpuinfo-table s4-1 sprite)
              (the-as sprite-vec-data-2d (&+ (-> gp-0 vecdata-table) (* 48 s4-1)))
              )
        ;; and to adgif
        (set! (-> gp-0 cpuinfo-table s4-1 adgif) (-> gp-0 adgifdata-table s4-1))
        ;; default init adgifs.
        (adgif-shader<-texture-simple!
          (-> gp-0 adgifdata-table s4-1)
          (the-as texture #f)
          )
        (set! (-> gp-0 adgifdata-table s4-1 alpha) (new 'static 'gs-alpha :b #x2 :d #x1))
        )
      )
    gp-0
    )
  )


;;;;;;;;;;;;;;;;;;;;
;; particle systems
;;;;;;;;;;;;;;;;;;;;

;; note: these constants must match the sizes of the sprite arrays.

(define *sp-particle-system-2d*
        (new 'global 'sparticle-system 1920 128 #f (-> *sprite-array-2d* vec-data) (-> *sprite-array-2d* adgif-data))
        )

(define *sp-particle-system-3d*
        (new 'global 'sparticle-system 256 0 #t (-> *sprite-array-3d* vec-data) (-> *sprite-array-3d* adgif-data))
        )



;;;;;;;;;;;;;;;;;;;;
;; alloc and block
;;;;;;;;;;;;;;;;;;;;

(defun sp-get-block-size ((arg0 sparticle-system) (arg1 int))
  "get the index of the highest used block for the given group (0 or 1)"
  (let ((v0-0 0))
    (let ((v1-0 0)
          (a2-0 (-> arg0 blocks 0))
          )
      (when (= arg1 1)
        (set! v1-0 a2-0)
        (set! a2-0 (-> arg0 blocks 1))
        )
      (dotimes (a1-3 a2-0)
        (if (!= (-> arg0 alloc-table (+ v1-0 a1-3)) -1)
            (set! v0-0 (+ a1-3 1))
            )
        )
      )
    v0-0
    )
  )

(defun sp-get-approx-alloc-size ((arg0 sparticle-system) (arg1 int))
  "get approximately the amount of sprite memory used."
  ;; this is just (* 64 (sp-get-block-size arg0 arg1))
  (let ((a3-0 arg1)
        (v1-0 0)
        )
    (let ((a1-1 0)
          (a2-0 (-> arg0 blocks 0))
          )
      (when (= a3-0 1)
        (set! a1-1 a2-0)
        (set! a2-0 (-> arg0 blocks 1))
        )
      (dotimes (a3-3 a2-0)
        (if (!= (-> arg0 alloc-table (+ a1-1 a3-3)) -1)
            (set! v1-0 (+ a3-3 1))
            )
        )
      )
    (* v1-0 64)
    )
  )

(defun sp-free-particle ((arg0 sparticle-system) (arg1 int) (arg2 sparticle-cpuinfo) (arg3 sprite-vec-data-2d))
  "free a particle"
  
  ;; clear flags on our launch state.
  (if (and (-> arg2 binding) (nonzero? (-> arg2 binding)))
      (logclear! (-> arg2 binding flags)
                 (sp-launch-state-flags launcher-active particles-active)
                 )
      )
  
  ;; clear the bit indicating that we're alive.
  (let ((v1-6 (/ arg1 64))
        (t0-4 (logand arg1 63))
        )
   (logior! (-> arg0 alloc-table v1-6) (ash 1 t0-4))
   )
  
  ;; decrease alloc count for the appropriate group
  (if (< arg1 (-> arg0 length 0))
   (+! (-> arg0 num-alloc 0) -1)
   (+! (-> arg0 num-alloc 1) -1)
   )
  (set! (-> arg2 valid) #f)
  (set! (-> arg3 a) 0.0)
  0
  (none)
  )

(defun sp-get-particle ((arg0 sparticle-system) (arg1 int) (arg2 sparticle-launch-state))
  "alloc a particle"
  (local-vars
   (a2-3 int)
   (a2-4 int)
   (a2-5 int)
   (a2-6 int)
   (a2-7 int)
   (a2-8 int)
   (t1-16 int)
   (t1-17 int)
   (t1-18 int)
   (t1-19 int)
   (t1-20 int)
   (t3-5 int)
   )
  (let ((v1-0 0)
        (t0-0 (-> arg0 blocks 0))
        (a3-0 0)
        )
   (when (= arg1 1)
    (set! v1-0 t0-0)
    (set! t0-0 (-> arg0 blocks 1))
    )
   
   ;; this adds a moving offset to the allocation system. I'm not sure why.
   (when arg2
    (set! a3-0 (the-as int (-> arg2 randomize)))
    (+! (-> arg2 randomize) 1)
    (when (= (-> arg2 randomize) t0-0)
     (set! (-> arg2 randomize) (the-as uint 0))
     0
     )
    )
   
   ;; find the earliest free.
   (dotimes (a2-1 t0-0)
    (when (nonzero? (-> arg0 alloc-table (+ v1-0 a3-0)))
     (let ((a2-2 0)
           (t1-15 (-> arg0 alloc-table (+ v1-0 a3-0)))
           (t0-4 (* (+ v1-0 a3-0) 64))
           )
      0
      0
      (let ((t2-4 (shl t1-15 32))
            (t3-0 (+ a2-2 32))
            )
       (.movn t1-16 t2-4 t2-4 t1-15)
       (.movz a2-3 t3-0 t2-4 a2-2)
       )
      (let ((t2-5 (shl t1-16 16))
            (t3-1 (+ a2-3 16))
            )
       (.movn t1-17 t2-5 t2-5 t1-16)
       (.movz a2-4 t3-1 t2-5 a2-3)
       )
      (let ((t2-6 (* t1-17 256))
            (t3-2 (+ a2-4 8))
            )
       (.movn t1-18 t2-6 t2-6 t1-17)
       (.movz a2-5 t3-2 t2-6 a2-4)
       )
      (let ((t2-7 (* t1-18 16))
            (t3-3 (+ a2-5 4))
            )
       (.movn t1-19 t2-7 t2-7 t1-18)
       (.movz a2-6 t3-3 t2-7 a2-5)
       )
      (let ((t2-8 (* t1-19 4))
            (t3-4 (+ a2-6 2))
            )
       (.movn t1-20 t2-8 t2-8 t1-19)
       (.movz a2-7 t3-4 t2-8 a2-6)
       (let ((t1-21 (* t1-20 2))
             (t2-9 (+ a2-7 1))
             )
        (.movn t3-5 t1-21 t1-21 t3-4)
        (.movz a2-8 t2-9 t1-21 a2-7)
        )
       )
      ;; mark as allocated
      (let ((t0-5 (+ t0-4 a2-8)))
       (set! (-> arg0 alloc-table (+ v1-0 a3-0))
        (logxor (-> arg0 alloc-table (+ v1-0 a3-0)) (the-as uint (ash 1 a2-8)))
        )
       ;; update group's alloc count
       (+! (-> arg0 num-alloc arg1) 1)
       ;; return it!
       (let ((v1-9 (-> arg0 cpuinfo-table t0-5)))
        (set! (-> v1-9 valid) #t)
        (return v1-9)
        )
       )
      )
     )
    (+! a3-0 1)
    (when (= a3-0 t0-0)
        ;; wrap
     (set! a3-0 0)
     )
    )
   )
  
  (the-as sparticle-cpuinfo #f)
  )

(defun sp-kill-particle ((arg0 sparticle-system) (arg1 sparticle-cpuinfo))
  "kill the given particle"
  (cond
    ;; modified to check the end of the spad too.
    ((in-scratchpad? arg1) ;;(>= (the-as int arg1) #x70000000) ;; TODO PC port
     ;; if in the sratchpad, just set the timer to 0.
     (set! (-> arg1 timer) 0)
     0
     )
    (else
      (let ((a2-1 (/ (the-as int (- (the-as uint arg1) (the-as uint (-> arg0 cpuinfo-table 0)))) 144)))
        (when (or (< a2-1 0) (>= a2-1 (+ (-> arg0 length 0) (-> arg0 length 1))))
          ;; invalid location for particle, error
          (format 0 "Tried to release particle ~D~%" a2-1)
          (return #f)
          )
        ;; free it.
        (sp-free-particle arg0 a2-1 arg1 (-> arg1 sprite))
        )
      )
    )
  #t
  (none)
  )


;;;;;;;;;;;;;;;;
;; effects
;;;;;;;;;;;;;;;;

(defun sp-orbiter ((arg0 sparticle-system) (arg1 sparticle-cpuinfo) (arg2 vector))
  (let* ((f2-0 (-> arg1 omega))
         (f0-0 (-> arg1 radius))
         (f4-0 (-> arg1 vel-sxvel x))
         (f24-0 (-> arg1 vel-sxvel y))
         (f1-0 (-> arg1 vel-sxvel z))
         (f3-0 (-> *sp-frame-time* y))
         (f28-0 (+ f2-0 (* f4-0 f3-0)))
         )
    (set! (-> arg1 omega) f28-0)
    (let ((f30-0 (+ f0-0 (* f1-0 f3-0))))
      (set! (-> arg1 radius) f30-0)
      (let ((f26-0 (sin f28-0))
            (f28-1 (cos f28-0))
            (f22-0 (sin (* 0.5 f24-0)))
            (f0-5 (cos (* 0.5 f24-0)))
            (a1-1 (new 'stack-no-clear 'vector))
            (s4-0 (new 'stack-no-clear 'vector))
            )
        (let ((s3-0 (new 'stack-no-clear 'matrix)))
          (set-vector! a1-1 (* f22-0 f28-1) 0.0 (* f22-0 f26-0) f0-5)
          (quaternion*!
            (-> arg1 rotvel3d)
            (the-as quaternion a1-1)
            (-> arg1 rotvel3d)
            )
          (quaternion-normalize! (-> arg1 rotvel3d))
          (set-vector! s4-0 (* f26-0 f30-0) 0.0 (* f28-1 f30-0) 1.0)
          (quaternion->matrix s3-0 (-> arg1 rotvel3d))
          (vector-matrix*! s4-0 s4-0 s3-0)
          )
        (let ((v1-3 (the-as object (-> arg1 user-float))))
          (set! (-> arg2 x) (+ (-> s4-0 x) (-> (the-as sprite-vec-data-2d v1-3) x)))
          (set! (-> arg2 y) (+ (-> s4-0 y) (-> (the-as sprite-vec-data-2d v1-3) y)))
          (set! (-> arg2 z) (+ (-> s4-0 z) (-> (the-as sprite-vec-data-2d v1-3) z)))
          )
        )
      )
    )
  0
  (none)
  )


;;;;;;;;;;;;;;;;;;;;;
;; particle update
;;;;;;;;;;;;;;;;;;;;;

;; TODO sp-process-block-2d
;; TODO sp-process-block-3d
(define-extern sp-process-block-3d (function sparticle-system int int int int symbol none))
(set! sp-process-block-3d (the (function sparticle-system int int int int symbol none)
                               (__pc-get-mips2c "sp-process-block-3d")))
(define-extern sp-process-block-2d (function sparticle-system int int int int symbol none))
(set! sp-process-block-2d (the (function sparticle-system int int int int symbol none)
                               (__pc-get-mips2c "sp-process-block-2d")))


(defun sp-copy-to-spr ((arg0 int) (arg1 pointer) (arg2 int))
  ;; modified to use fake spad
  (let ((a2-1 (/ (+ arg2 15) 16)))
    (__mem-move (&+ (scratchpad-start) arg0) arg1 (the uint (* a2-1 16)))
    ;; (dma-send-to-spr-no-flush (the-as uint arg0) (the-as uint arg1) (the-as uint a2-1) #t)
    )
  0
  (none)
  )

(defun sp-copy-from-spr ((arg0 int) (arg1 pointer) (arg2 int))
  ;; modified to use fake spad.
  (let ((a2-1 (/ (+ arg2 15) 16)))
    (__mem-move arg1 (&+ (scratchpad-start) arg0) (the uint (* a2-1 16)))
    ;;(dma-send-from-spr-no-flush (the-as uint arg1) (the-as uint arg0) (the-as uint a2-1) #t)
    )
  0
  (none)
  )

;; TODO memcpy (unused)

(defun sp-process-block ((arg0 sparticle-system) (arg1 int) (arg2 sprite-array-2d) (arg3 int))
  "update the given block of particles"
  (local-vars
    (sv-16 int)
    (sv-32 int)
    (sv-80 int)
    (sv-96 int)
    )
  (let ((s3-0 16)
        (s2-0 (* 144 arg3))
        (s5-0 (* 48 arg3))
        )
    (set! sv-32 (* 80 arg3))
    (let ((s1-0 (+ s3-0 s2-0)))
      (set! sv-16 (+ s1-0 s5-0))
      (sp-copy-to-spr s3-0 (the-as pointer (-> arg0 cpuinfo-table arg1)) s2-0)
      (sp-copy-to-spr s1-0 (&+ (-> arg0 vecdata-table) (* 48 arg1)) s5-0)
      (let ((t9-2 sp-copy-to-spr)
            (a1-7 (-> arg0 adgifdata-table arg1))
            )
        (t9-2 sv-16 (the-as pointer a1-7) sv-32)
        )
      
      ;; alternate to run without doing scratchpad (will change behavior of kill, but at least works for hud)
      ; (set! sv-80 (the-as int (-> arg0 cpuinfo-table arg1)))
      ; (set! sv-96 (the-as int (&+ (-> arg0 vecdata-table) (* 48 arg1))))
      (set! sv-80 (+ (the int (scratchpad-start)) s3-0)) ;; spad
      (set! sv-96 (+ (the int (scratchpad-start)) s1-0)) ;; spad
      (cond
        ((-> arg0 is-3d)
         (sp-process-block-3d arg0 sv-80 sv-96 arg1 arg3 (paused?))
         )
        (else
          (sp-process-block-2d arg0 sv-80 sv-96 arg1 arg3 (paused?))
          )
        )
      (sp-copy-from-spr s3-0 (the-as pointer (-> arg0 cpuinfo-table arg1)) s2-0)
      (sp-copy-from-spr s1-0 (&+ (-> arg0 vecdata-table) (* 48 arg1)) s5-0)
      )
    )
  0
  (none)
  )

(defun sp-process-particle-system ((arg0 sparticle-system) (arg1 int) (arg2 sprite-array-2d))
  "update an entire particle system."
  (let* ((v1-0 16)
         (s1-0 (/ (- #x4000 v1-0) 272)) ;; offset in spad of vecdata, max sprite data in spad
         (s3-0 0) ;; mem offset
         (s4-0 (sp-get-approx-alloc-size arg0 arg1)) ;; remaining size.
         )
    ;; group 1 starts after group 0
    (if (= arg1 1)
        (set! s3-0 (* (-> arg0 blocks 0) 64))
        )
    (set! (-> arg2 num-valid arg1) s4-0)
    ;; flush before processing
    (flush-cache 0)
    (while (>= s4-0 s1-0) ;; there are full blocks remaining...
      (sp-process-block arg0 s3-0 arg2 s1-0) ;; process it
      (set! s4-0 (- s4-0 s1-0))
      (+! s3-0 s1-0) ;; next data
      )
    ;; if there's anything leftover, don't forget that.
    (if (> s4-0 0)
        (sp-process-block arg0 s3-0 arg2 s4-0)
        )
    )
  0
  (none)
  )

(define-perm *particles-flag* symbol #t)

(defun forall-particles-with-key-runner ((arg0 sparticle-launch-control) (arg1 (function sparticle-system sparticle-cpuinfo none)) (arg2 sparticle-system))
  "call the given function on all particles with the given key (arg0)"
  (local-vars (sv-16 int))
  (let ((s3-0 (the-as object (-> arg2 cpuinfo-table 0)))
        (s2-0 (&+ (-> arg2 vecdata-table) 0))
        (s1-0 (+ (-> arg2 blocks 0) (-> arg2 blocks 1)))
        )
    (dotimes (s0-0 s1-0) ;; loop over blocks
      (cond
        ((!= (-> arg2 alloc-table s0-0) -1) ;; block has something allocated.
         (set! sv-16 0)
         (while (< sv-16 64)
           (if (and (-> (the-as sparticle-cpuinfo s3-0) valid) ;; is allocated
                    (= (-> (the-as sparticle-cpuinfo s3-0) key) arg0) ;; matches the key
                    )
               (arg1 arg2 (the-as sparticle-cpuinfo s3-0)) ;; run the callback!
               )
           (set! s3-0 (-> (the-as (inline-array sparticle-cpuinfo) s3-0) 1)) ;; next cpu
           (&+! s2-0 48) ;; next vec
           (set! sv-16 (+ sv-16 1)) ;; next idx in block
           )
         )
        (else
          ;; skip the whole block!
          (set! s3-0 (-> (the-as (inline-array sparticle-cpuinfo) s3-0) 64))
          (&+! s2-0 3072)
          )
        )
      )
    )
  0
  (none)
  )

(defun forall-particles-with-key ((arg0 sparticle-launch-control) (arg1 (function sparticle-system sparticle-cpuinfo none)) (arg2 symbol) (arg3 symbol))
  "call the given function on all particles with the given key. arg2 is 2d, arg3 is 3d."
  (if arg2
   (forall-particles-with-key-runner arg0 arg1 *sp-particle-system-2d*)
   )
  (if arg3
   (forall-particles-with-key-runner arg0 arg1 *sp-particle-system-3d*)
   )
  0
  (none)
  )


(defun sparticle-kill-it ((arg0 sparticle-system) (arg1 sparticle-cpuinfo))
  "kill a particle without freeing it."
  (set! (-> arg1 timer) 0) ;; advance timer to zero
  (set! (-> arg1 func) (the-as basic 0)) ;; don't let the callback run and save the timer
  (when (and (-> arg1 binding) (nonzero? (-> arg1 binding)))
    ;; kill the launcher too.
    (logclear! (-> arg1 binding flags)
               (sp-launch-state-flags launcher-active particles-active)
               )
    ;; and forget it, I guess it could be unloaded
    (set! (-> arg1 binding) #f)
    )
  0
  (none)
  )

(defun sparticle-kill-it-level0 ((arg0 sparticle-system) (arg1 sparticle-cpuinfo))
  "kill all particles belonging to level 0"
  (if (logtest? (-> arg1 flags) (sp-cpuinfo-flag level0))
      (sparticle-kill-it arg0 arg1)
      )
  0
  (none)
  )

(defun sparticle-kill-it-level1 ((arg0 sparticle-system) (arg1 sparticle-cpuinfo))
  "kill all particles belonging to level 1."
  (if (logtest? (-> arg1 flags) (sp-cpuinfo-flag level1))
      (sparticle-kill-it arg0 arg1)
      )
  0
  (none)
  )

(defun sparticle-60-to-50 ((arg0 sparticle-system) (arg1 sparticle-cpuinfo) (arg2 pointer))
  "convert from 60hz to 50hz particles"
  (let ((gp-0 (-> arg1 rotvel3d))
        (s5-0 (new 'stack-no-clear 'quaternion))
        )
    (vector-angle<-quaternion! (the-as vector s5-0) gp-0)
    (set! (-> s5-0 w) (* 12516.455 (-> s5-0 w)))
    (quaternion-vector-angle! gp-0 (the-as vector s5-0) (-> s5-0 w))
    )
  0
  (none)
  )

(defun sparticle-50-to-60 ((arg0 sparticle-system) (arg1 sparticle-cpuinfo) (arg2 pointer))
  "convert from 50hz to 60hz particles"
  (let ((gp-0 (-> arg1 rotvel3d))
        (s5-0 (new 'stack-no-clear 'quaternion))
        )
    (vector-angle<-quaternion! (the-as vector s5-0) gp-0)
    (set! (-> s5-0 w) (* 8691.982 (-> s5-0 w)))
    (quaternion-vector-angle! gp-0 (the-as vector s5-0) (-> s5-0 w))
    )
  0
  (none)
  )

(defun kill-all-particles-with-key ((arg0 sparticle-launch-control))
  (forall-particles-with-key arg0 sparticle-kill-it #t #t)
  0
  (none)
  )


(defun forall-particles-runner ((arg0 (function sparticle-system sparticle-cpuinfo pointer none)) (arg1 sparticle-system))
  "run function on all particles in the system."
  (let ((s4-0 (the-as object (-> arg1 cpuinfo-table 0)))
        (s3-0 (&+ (-> arg1 vecdata-table) 0))
        (s2-0 (+ (-> arg1 blocks 0) (-> arg1 blocks 1)))
        )
    (dotimes (s1-0 s2-0)
      (cond
        ((!= (-> arg1 alloc-table s1-0) -1)
         (dotimes (s0-0 64)
           (if (-> (the-as sparticle-cpuinfo s4-0) valid)
               (arg0 arg1 (the-as sparticle-cpuinfo s4-0) s3-0)
               )
           (set! s4-0 (+ (the-as uint s4-0) 144))
           (&+! s3-0 48)
           )
         )
        (else
          (set! s4-0 (&+ (the-as pointer s4-0) 9216))
          (&+! s3-0 3072)
          )
        )
      )
    )
  0
  (none)
  )

(defun forall-particles ((arg0 function) (arg1 symbol) (arg2 symbol))
  "run function on all particles. arg1 for 2d, arg2 for 3d."
  (if arg1
      (forall-particles-runner
        (the-as (function sparticle-system sparticle-cpuinfo pointer none) arg0)
        *sp-particle-system-2d*
        )
      )
  (if arg2
      (forall-particles-runner
        (the-as (function sparticle-system sparticle-cpuinfo pointer none) arg0)
        *sp-particle-system-3d*
        )
      )
  0
  (none)
  )

(defun kill-all-particles-in-level ((arg0 level))
  "kill all particles belonging to the given level."
  (forall-particles (if (zero? (-> arg0 index))
                        sparticle-kill-it-level0
                        sparticle-kill-it-level1
                        )
                    #t
                    #t
                    )
  0
  )

(defun all-particles-50-to-60 ()
  (forall-particles-runner sparticle-50-to-60 *sp-particle-system-3d*)
  (none)
  )

(defun all-particles-60-to-50 ()
  (forall-particles-runner sparticle-60-to-50 *sp-particle-system-3d*)
  (none)
  )

(defun set-particle-frame-time ((arg0 int))
  (cond
   ((= arg0 5)
    (set-vector!
     *sp-frame-time*
     0.00000000000000000000000000000000000001175495
     5.0
     1.0
     1.0
     )
    )
   ((= arg0 6)
    (set-vector!
     *sp-frame-time*
     0.000000000000000000000000000000000000011754952
     6.0
     1.2
     1.2
     )
    )
   ((= arg0 10)
    (set-vector!
     *sp-frame-time*
     0.000000000000000000000000000000000000011754958
     10.0
     2.0
     2.0
     )
    )
   ((= arg0 12)
    (set-vector!
     *sp-frame-time*
     0.00000000000000000000000000000000000001175496
     12.0
     2.4
     2.4
     )
    )
   )
  0
  (none)
  )

(defun process-particles ()
  "main particle system update."
  (local-vars (v1-29 int) (gp-0 int))
  (when *particles-flag*
   0
   0
   ;;(.mfc0 gp-0 Count)
   (set! *sp-launcher-lock* #t)
   ;; start a profile frame.
   (if *debug-segment*
    (add-frame
     (-> *display* frames (-> *display* on-screen) frame profile-bar 0)
     'draw
     (new 'static 'rgba :r #x40 :b #x40 :a #x80)
     )
    )
   
   ;; update timer
   (let ((v1-14 (logand (the-as int (-> *sp-frame-time* x)) 255)))
     (set! *particle-300hz-timer* (+ *particle-300hz-timer* v1-14))
     (cond
       (*sp-60-hz*
         ;; this is such a hack, but we can never get 6 or 12 in 50hz mode
         (when (or (= v1-14 6) (= v1-14 12))
           (set! *sp-60-hz* #f)
           (all-particles-60-to-50)
           )
         )
       (else
         ;; also a hack
         (when (or (= v1-14 5) (= v1-14 10))
           (set! *sp-60-hz* #t)
           (all-particles-50-to-60)
           )
         )
       )
     )
   
   ;; process the particles
   (clear-sprite-aux-list)
   (sp-process-particle-system *sp-particle-system-2d* 0 *sprite-array-2d*)
   (sp-process-particle-system *sp-particle-system-2d* 1 *sprite-array-2d*)
   (sp-process-particle-system *sp-particle-system-3d* 0 (the-as sprite-array-2d *sprite-array-3d*))
   (if *debug-segment*
    (add-frame
     (-> *display* frames (-> *display* on-screen) frame profile-bar 0)
     'draw
     (new 'static 'rgba :r #x80 :g #x80 :b #xff :a #x80)
     )
    )
   (set! *sp-launcher-lock* #f)
   
   ;; launch queued particles
   (sp-clear-queue)
   ;;(.mfc0 v1-29 Count)
   (let ((a2-5 (- v1-29 gp-0)))
    (if *display-sprite-info*
     (format
      *stdcon*
      "Particle time = ~D cycles for ~D 2D [~D warp] and ~D HUD and ~D 3D~%"
      1234 ;;a2-5
      (-> *sp-particle-system-2d* num-alloc 0)
      (-> *sprite-aux-list* entry)
      (-> *sp-particle-system-2d* num-alloc 1)
      (-> *sp-particle-system-3d* num-alloc 0)
      )
     )
    )
   )
  0
  (none)
  )