skb.ml

   1 open Format;;
   2
   3 let qof f = Qtr.make f.(5) f.(6) f.(7) f.(8);;
   4 let vof f = Vec.make f.(1) f.(2) f.(3);;
   5
   6 type t = int * (string * int32 array * float array * int array * float);;
   7
   8 let rt sbuf strtab =
   9   let d = Array.init 3 (fun n -> Xff.r32 sbuf (n*4)) in
  10   let f9 = Array.init 9 (fun n -> Xff.rfloat sbuf (12 +n*4)) in
  11   let h = Array.init 3 (fun n -> Xff.rint sbuf (48 + n*4)) in
  12   let f = Xff.rfloat sbuf 60 in
  13   (Xff.rcstrtabent strtab 0 (Int32.to_int d.(0)), d, f9, h, f)
  14 ;;
  15
  16 let r1 xff sbufxff =
  17   if Array.length xff.Xff.sections != 2
  18   then
  19     Xff.sbuferr sbufxff 0 "number of xff sections is not 2"
  20   ;
  21   let sectpos = xff.Xff.sections.(1).Xff.off in
  22   let sectbuf = Xff.sbufplus sbufxff sectpos in
  23   let skbbuf = Xff.sbufplus sectbuf xff.Xff.entry in
  24
  25   let count1 = Xff.rint skbbuf 4 in
  26   let _pos1 = Xff.rint skbbuf 8 in
  27   let tabpos1 = Xff.rint skbbuf 12 in
  28   let strtab1 = Xff.sbufplus sectbuf tabpos1 in
  29
  30   let bones = Array.init count1 (fun n ->
  31     let pos = Xff.rint skbbuf (44 + n*8) in
  32     let sbuf = Xff.sbufplus sectbuf pos in
  33     pos + sectpos, rt sbuf strtab1)
  34   in
  35   bones
  36 ;;
  37
  38 let vertices bones quats =
  39   let parentinfo = Array.make (Array.length bones + 1) (Qtr.id, Vec.origin) in
  40   let mapf i (pos, (name, offsets, floats, neighbors, float)) =
  41     let curq = quats.(i) in
  42     let curv = vof floats in
  43
  44     let parent = neighbors.(2) in
  45     let parentq, parentv = parentinfo.(parent + 1) in
  46
  47     let v = Qtr.apply parentq curv in
  48     let v = Vec.add v parentv in
  49
  50     let q = Qtr.compose curq parentq in
  51     parentinfo.(i + 1) <- (q, v);
  52     Vec.elts parentv, Vec.elts v;
  53   in
  54   Array.mapi mapf bones;
  55 ;;
  56
  57 let sphere =
  58   let quad = lazy (GluQuadric.create ()) in
  59   fun origin ->
  60     GlMat.mode `modelview;
  61     GlMat.push ();
  62     GlMat.translate3 (origin);
  63     let radius = Rend.view.Rend.radial_scale*.0.009 in
  64     let quad = Lazy.force quad in
  65     GluQuadric.sphere ~radius ~stacks:5 ~slices:5 ~quad ();
  66     GlMat.pop ();
  67 ;;
  68
  69 let draw bones =
  70   fun ?(dsphere=false) quats ->
  71     let rta = vertices bones quats in
  72     fun () ->
  73       GlDraw.polygon_mode `both `line;
  74       GlDraw.color (0., 0., 1.);
  75       Gl.disable  `depth_test;
  76       for i = 0 to Array.length bones - 1 do
  77         let v0, v1 = rta.(i) in
  78         if dsphere then (
  79           GlDraw.line_width 0.1;
  80           sphere v1;
  81         );
  82         GlDraw.line_width 2.0;
  83         GlDraw.begins `lines;
  84         GlDraw.vertex3 v0;
  85         GlDraw.vertex3 v1;
  86         GlDraw.ends ();
  87       done;
  88       Gl.enable `depth_test;
  89 ;;
  90
  91 let skbquats bones =
  92   Array.map (fun (_, (_, _, f, _, _)) -> qof f) bones
  93 ;;
  94
  95 let animate quats =
  96   Skin.set_anim quats;
  97   Skin.anim ();
  98 ;;
  99
 100 let obj bones anim =
 101   let posecount, rotations = anim in
 102   let clip poseno =
 103     let poseno' = poseno mod posecount in
 104     if poseno' < 0 then posecount + poseno' else poseno'
 105   in
 106   let skeldraw n quats =
 107     match n mod 3 with
 108     | 0 -> ()
 109     | 1 -> draw bones quats ()
 110     | _ -> draw ~dsphere:true bones quats ()
 111   in
 112   let skbquats = skbquats bones in
 113   (object (self)
 114     val drawindex = 0
 115     val sposeno = 0
 116     val dposeno = clip 1
 117     val quats = skbquats
 118     val t = 0.0
 119     val dir = 1
 120
 121     method private advance quats dir =
 122       let t = t +. !Rend.slerp_step in
 123       if t >= 1.0
 124       then
 125         let sposeno = dposeno
 126         and dposeno = clip (dposeno + dir) in
 127         {< quats = quats; sposeno = sposeno; dposeno = dposeno; t = 0.0 >}
 128       else
 129         {< quats = quats; sposeno = sposeno; dposeno = dposeno; t = 0.0 >}
 130
 131     method help =
 132       [("s", "toggle skeleton (S type)",
 133        if drawindex = 0 then "off" else string_of_int drawindex)
 134       ;"B", sprintf "toggle animation direction", string_of_int dir
 135       ;"f", "forward one frame", sprintf "%d, %f" sposeno t
 136       ;"b", "backward one frame", sprintf "%d, %f" sposeno t
 137       ;"", "", "total frames " ^ string_of_int posecount
 138       ;"r", "go to bind pose", ""
 139       ;"1,2", "go to first/last frame", ""
 140       ]
 141
 142     method draw = skeldraw drawindex quats
 143
 144     method char c =
 145       match c with
 146       | 'n' | 'f' | 'b' ->
 147           let quats = Anb.interpolated rotations sposeno dposeno t in
 148           animate quats;
 149           self#advance quats
 150             (match c with
 151             | 'n' -> dir
 152             | 'f' -> 1
 153             | _ -> -1)
 154
 155       | 'B' -> {< dir = -dir >}
 156
 157       | 'r' ->
 158           Skin.set_anim skbquats;
 159           Skin.anim ();
 160           {< drawindex = 1; quats = skbquats >}
 161
 162       | '1' | '2' ->
 163           let sposeno, dposeno =
 164             if c = '1'
 165             then 0, clip 1
 166             else clip (posecount - 1), 0
 167           in
 168           let quats = Anb.exact rotations sposeno in
 169           animate quats;
 170           let t = if dir > 0 then 1.0 else 0.0 in
 171           {< quats = quats; sposeno = sposeno; dposeno = dposeno; t = t >}
 172
 173       | 's' -> {< drawindex = drawindex lxor 1 >}
 174       | 'S' -> {< drawindex = (drawindex + 1) mod 3 >}
 175       | _ -> self
 176   end)
 177 ;;
 178
 179 let dummy draw =
 180   (object (self)
 181     val dodraw = false
 182
 183     method help = ["s", "toggle skeleton", if dodraw then "on" else "off"]
 184     method draw = if dodraw then draw ()
 185     method char c =
 186       if c = 's' then {< dodraw = not dodraw >} else self
 187   end)
 188 ;;
 189
 190 let skin bones =
 191   let skel = Array.map
 192     (fun (_, (_, _, floats, neighbors, _)) -> (neighbors.(2), floats))
 193     bones
 194   in
 195   Skin.set_skel skel;
 196 ;;
 197
 198 let main name =
 199   let obj =
 200     try
 201       let name =
 202         match !Rend.skb_name with
 203         | Some s -> s
 204         | None ->
 205             Filename.chop_extension name ^ ".skb"
 206       in
 207       let xff, sbuf = Xff.test2 name in
 208       let bones = r1 xff sbuf in
 209       begin match !Rend.anb_names with
 210       | [] ->
 211           let quats = skbquats bones in
 212           dummy (draw bones quats)
 213       | hd :: tl ->
 214           let ranb name =
 215             let xff, sbuf = Xff.test2 (Filename.basename name) in
 216             let anim = Anb.r xff sbuf in
 217             anim
 218           in
 219           let anim =
 220             List.fold_left
 221               (fun accu name -> Anb.append accu (ranb name)) (ranb hd) tl
 222           in
 223           skin bones;
 224           obj bones anim;
 225       end;
 226     with exn ->
 227       prerr_endline (Printexc.to_string exn);
 228       (object (self)
 229         method help = []
 230         method draw = ()
 231         method char _ = self
 232       end)
 233   in
 234   Rend.add_obj obj
 235 ;;