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gamepad graphics

• To: mathgroup at smc.vnet.net
• Subject: [mg79816] gamepad graphics
• From: zzzz <giarc54 at gmail.com>
• Date: Sun, 5 Aug 2007 04:56:23 -0400 (EDT)

I wrote a program that is supposed to use my Logitech
gamepad (for ps3) to control a point so that as it aproaches
a disk, the hue of the disk will change.
Curiously,(to me anyway) this programs works (kind of) only when a
print command is inserted as below:


DynamicModule[{x = -400, y = -400, d = 1000, a = .5},
 ControllerManipulate[

  Graphics[{{Hue[Dynamic[a]], Disk[{0, 0}, 200]}, {PointSize[Large],
     Point[{x, y}]}}, Axes -> True, PlotRange -> 1000,
   AspectRatio -> 1/1, ImageSize -> {500, 500}],
  Dynamic[x = x + ControllerState["Z1"]],
  Dynamic[y = y + ControllerState["Y2"]],


  Dynamic[d = Sqrt[Abs[((x - 0)^2) + ((y - 0)^2)]  ] ] ,
                Dynamic[a = (N[Dynamic[d]/1000])],
  (* Print[]  *)

                "Z1" -> {x, -1000, 1000, .01},
                       "Y2" -> {y, -1000, 1000, .01},

                    ControllerMethod -> "None"]]




  When I remove the comment parentheses and asterix,
it works,,,slowly. If I leave the them, the disk won't change
color. How can I implement this better?Correctly?
Please Help.
I have a similar problem in 3D Below:


DynamicModule[{x = 900, y = 900, z = 900, d = 0.00, p = 1.3, q = -2.4,
   r = 2, a = 1},
 ControllerManipulate[

  Dynamic[
   Graphics3D[{PointSize[Large], Hue[Dynamic[a]],
     Sphere[{0, 0, 0}, 200], {Hue[.8], Sphere[{x, y, z}, 50]}},
    PlotRange -> 1050, AspectRatio -> Automatic,
    BoxRatios -> {1, 1, 1}, Axes -> True, ImageSize -> {600, 600},
    ViewPoint -> {p, q, r}]],

  Dynamic[
   d = Sqrt[((Dynamic[x] - 0)^2) + ((Dynamic[y] -
          0)^2) + ((Dynamic[z] - 0)^2)]  ],
   Dynamic[a = (N[Dynamic[d]/1000])],
  Dynamic[z = z + ControllerState["Y1"]],
  Dynamic[x = x + ControllerState["Z1"]],
  Dynamic[y = y + ControllerState["Y2"]],
  Dynamic[p = p + ControllerState["X3"]],
  Dynamic[q = q + ControllerState["Y3"]],

  (*Print[],  *)

  "Y3" -> {q, -10, 10, .00001},
  "X3" -> {p, -10, 10, .00001},
  "Y1" -> {z, -1000, 1000, .01},
  "Z1" -> {x, -1000, 1000, .01},
  "Y2" -> {y, -1000, 1000, .01},
  ControllerMethod -> "None", TrackedSymbols -> All]
     ]


Gratefull for any help!

• Follow-Ups:
  • Re: gamepad graphics
    • From: Murray Eisenberg <murray@math.umass.edu>