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

;; name: shadow-cpu-h.gc
;; name in dgo: shadow-cpu-h
;; dgos: GAME

;; +++shadow-flags
(defenum shadow-flags
  :bitfield #t
  :type int32
  (shdf00) ;; unused
  (disable-fade)
  (shdf02) ;; only set, never used.
  (shdf03)
  (shdf04) ;; unused
  (disable-draw)
  (shdf06)
  (shdf07)
  )
;; ---shadow-flags


(declare-type shadow-vu1-constants structure)

;; DECOMP BEGINS

(deftype shadow-settings (structure)
  "Settings used to draw a shadow."
  ((center         vector        :inline)
   (flags          shadow-flags  :overlay-at (-> center data 3))
   (shadow-dir     vector        :inline)
   (dist-to-locus  float         :overlay-at (-> shadow-dir data 3))
   (bot-plane      plane         :inline)
   (top-plane      plane         :inline)
   (fade-dist      float         :offset  64)
   (fade-start     float)
   (dummy-2        int32)
   (shadow-type    int32)
   )
  )


(deftype shadow-control (basic)
  ((settings  shadow-settings  :inline)
   )
  (:methods
    (new (symbol type float float float vector float float) _type_)
    (enable-draw (shadow-control) int)
    (disable-draw (shadow-control) int)
    (set-top-plane-offset (shadow-control float) int)
    (set-bottom-plane-offset (shadow-control float) int)
    (probe-line-for-shadow (_type_ vector float float float) none)
    (shadow-control-method-14 (_type_ vector vector float float float) none)
    )
  )


(defmethod enable-draw ((this shadow-control))
  (logclear! (-> this settings flags) (shadow-flags disable-draw))
  0
  )

(defmethod disable-draw ((this shadow-control))
  (logior! (-> this settings flags) (shadow-flags disable-draw))
  0
  )

(defmethod set-bottom-plane-offset ((this shadow-control) (arg0 float))
  (set! (-> this settings bot-plane w) (- arg0))
  0
  )

(defmethod set-top-plane-offset ((this shadow-control) (arg0 float))
  (set! (-> this settings top-plane w) (- arg0))
  0
  )

(deftype shadow-data (structure)
  "DMA data for the shadow renderer."
  ((dma-unpack-template  dma-packet  :inline)
   (dma-cnt              dma-tag)
   (vif-nop              vif-tag)
   (vif-unpack-v4-8      vif-tag)
   (pdc                  basic)
   (dist                 float)
   (waits                uint32)
   (inside-volume?       uint32)
   )
  )


(deftype shadow-work (structure)
  ((shadow-data  shadow-data  :inline)
   (inbuf        uint128      600)
   )
  )


(deftype shadow-bucket (structure)
  ((first         pointer)
   (next          pointer)
   (bucket-id     bucket-id)
   (shadow-color  rgba)
   (constants     shadow-vu1-constants)
   )
  :allow-misaligned
  )


(deftype shadow-globals (structure)
  ((num-buckets  uint32)
   (cur-bucket   uint32)
   (bucket       shadow-bucket  3 :inline)
   )
  )


(define *shadow-globals* (new 'global 'shadow-globals))

(set! (-> *shadow-globals* bucket 0 bucket-id) (bucket-id shadow))

(set! (-> *shadow-globals* bucket 1 bucket-id) (bucket-id shadow2))

(set! (-> *shadow-globals* bucket 2 bucket-id) (bucket-id shadow3))

(deftype shadow-vertex (structure)
  ((x       float)
   (y       float)
   (z       float)
   (weight  float)
   )
  )


(deftype shadow-matrix-ref (structure)
  ((joint-0  uint8)
   (joint-1  uint8)
   )
  )


(deftype shadow-edge (structure)
  ((ind-0  uint8)
   (ind-1  uint8)
   (tri-0  uint8)
   (tri-1  uint8)
   )
  )

(deftype shadow-tri (structure)
  ((ind-0  uint8)
   (ind-1  uint8)
   (ind-2  uint8)
   (faces  uint8)
   )
  )


;; og:preserve-this duplicate type definition
;; (deftype shadow-edge (structure)
;;   ((ind-0  uint8)
;;    (ind-1  uint8)
;;    (tri-0  uint8)
;;    (tri-1  uint8)
;;    )
;;   )


(deftype shadow-frag-header (structure)
  ((qwc-data          uint32)
   (num-joints        uint32)
   (num-verts         uint16)
   (num-twos          uint16)
   (num-single-tris   uint16)
   (num-single-edges  uint16)
   (num-double-tris   uint16)
   (num-double-edges  uint16)
   (ofs-verts         uint32)
   (ofs-refs          uint32)
   (ofs-single-tris   uint32)
   (ofs-single-edges  uint32)
   (ofs-double-tris   uint32)
   (ofs-double-edges  uint32)
   )
  )


(deftype shadow-frag-ref (structure)
  ((header  shadow-frag-header)
   (qwc     uint32)
   )
  :pack-me
  )


(deftype shadow-geo (art-element)
  "The low poly model used for drawing the shadow."
  ((version        uint32           :overlay-at (-> pad 0))
   (total-size     uint32           :overlay-at (-> pad 4))
   (total-qwc      uint32)
   (num-joints     uint32)
   (num-fragments  uint32)
   (frags          shadow-frag-ref  :inline :dynamic)
   )
  )


(defmethod new shadow-control ((allocation symbol)
                             (type-to-make type)
                             (arg0 float)
                             (arg1 float)
                             (arg2 float)
                             (arg3 vector)
                             (arg4 float)
                             (arg5 float)
                             )
  (let ((v0-0 (object-new allocation type-to-make (the-as int (-> type-to-make size)))))
    (if arg3
        (set! (-> v0-0 settings center quad) (-> arg3 quad))
        )
    (set! (-> v0-0 settings flags) (the-as shadow-flags arg4))
    (set-vector! (-> v0-0 settings shadow-dir) 0.0 -1.0 0.0 arg2)
    (set-vector! (-> v0-0 settings bot-plane) 0.0 1.0 0.0 (- arg0))
    (set-vector! (-> v0-0 settings top-plane) 0.0 1.0 0.0 (- arg1))
    (set! (-> v0-0 settings fade-dist) arg5)
    (set! (-> v0-0 settings shadow-type) 0)
    v0-0
    )
  )

(define *shadow* #f)

(define *shadow-object* #f)

(define *shadow-debug* #f)

(define *shadow-dma-buf* (new 'global 'dma-buffer 512))