#X3D V3.0 utf8
PROFILE Immersive
# [X3D] version=3.0
# [X3D] noNamespaceSchemaLocation=https://www.web3d.org/specifications/x3d-3.0.xsd
# X3D-to-ClassicVRML XSL translation autogenerated by X3dToClassicVrmlEncoding.xslt and X3dToVrml97.xslt
# https://www.web3d.org/x3d/content/X3dToClassicVrmlEncoding.xslt
# https://www.web3d.org/x3d/content/X3dToVrml97.xslt
# Transformation using XSLT processor: Saxonica
# head
META "title" "CrossHairExample.x3d"
META "description" "Example use of a heads-up display (HUD) crosshair showing center of screen, useful for assessing lookAt point."
META "creator" "Don Brutzman"
META "created" "1 February 2003"
META "modified" "28 November 2019"
META "identifier" "https://savage.nps.edu/Savage/Tools/HeadsUpDisplays/CrossHairExample.x3d"
META "subject" "crosshair display"
META "generator" "X3D-Edit 3.2, https://savage.nps.edu/X3D-Edit"
META "license" "../../license.html"

# [Scene] ========== ========== ==========
# ========================
# Copy this ExternProtoDeclare and ProtoInstance for use in another scene
WorldInfo {
  title "CrossHairExample.x3d"
}
EXTERNPROTO CrossHair [ 
  # [appinfo] CrossHair prototype provides a heads-up display (HUD) crosshair at the view center, which is useful for assessing NavigationInfo lookAt point

  initializeOnly SFBool	 enabled    # [appinfo] whether CrossHair prototype is enabled or not

  inputOnly      SFBool	 set_enabled    # [appinfo] control whether enabled/disabled

  inputOutput    SFColor	 markerColor    # [appinfo] color of CrossHair marker

  inputOutput    SFVec3f	 scale    # [appinfo] size of CrossHair in meters

  inputOutput    SFVec3f	 positionOffsetFromCamera    # [appinfo] distance in front of HUD viewpoint

][
"../../../Savage/Tools/HeadsUpDisplays/CrossHairPrototype.x3d#CrossHair" "https://savage.nps.edu/Savage/Tools/HeadsUpDisplays/CrossHairPrototype.x3d#CrossHair" "../../../Savage/Tools/HeadsUpDisplays/CrossHairPrototype.wrl#CrossHair" "https://savage.nps.edu/Savage/Tools/HeadsUpDisplays/CrossHairPrototype.wrl#CrossHair"
 ]
DEF CrossHairInstance  CrossHair {
  enabled  TRUE
  markerColor  1 0.5 0
  scale  1 1 1
  positionOffsetFromCamera  0 0 -6
}
# ========================
# Test scene and background, to see that HUD remains fixed relative to viewpoint.
Viewpoint {
  description "walk and rotate to test heads-up display (HUD)"
}
Viewpoint {
  description "outside proximity box turns crosshair off"
  position 0 0 20
}
NavigationInfo {
  speed 10
  type [ "FLY" "ANY"  ] 
}
Background {
  skyColor [ 0.7 0.7 0.9 ]
}
Shape {
  geometry Text {
    string [ "Click text, zoom out/in," "or switch viewpoints to" "toggle CrossHair HUD" ]
    fontStyle FontStyle {
      justify [ "MIDDLE" "MIDDLE"  ] 
    }
  }
  appearance Appearance {
    material Material {
      diffuseColor 0.4 0.4 0.13
    }
  }
}
# ========================
# Turn CrossHair on/off depending on toggling Box touch
DEF TouchBox TouchSensor {
  description "touch to toggle CrossHair"
}
DEF TouchToggle BooleanToggle {
}
ROUTE TouchBox.isActive TO TouchToggle.set_boolean
# TouchToggle toggle_changed should likely revert to TouchToggle toggle when inputOutput fields supported in Script, or native implementation provided.
ROUTE TouchToggle.toggle_changed TO CrossHairInstance.set_enabled
# ========================
# Turn CrossHair on/off depending on proximity to a target location
Group {
  children [
      DEF ProximityBox ProximitySensor {
        size 21 21 21
      }
      DEF EnterProximityBox BooleanTrigger {
      }
      DEF ExitProximityBox BooleanTrigger {
      }
      DEF ExitFilter BooleanFilter {
      }
  ]
ROUTE ProximityBox.enterTime TO EnterProximityBox.set_triggerTime
ROUTE EnterProximityBox.triggerTrue TO CrossHairInstance.set_enabled
ROUTE ProximityBox.exitTime TO ExitProximityBox.set_triggerTime
ROUTE ExitProximityBox.triggerTrue TO ExitFilter.set_boolean
ROUTE ExitFilter.inputNegate TO CrossHairInstance.set_enabled
}