#X3D V3.0 utf8
# X3D-to-ClassicVRML XSL translation autogenerated by X3dToVrml97.xslt
# https://www.web3d.org/x3d/content/X3dToVrml97.xslt
# Generated using XSLT processor: Saxonica

PROFILE Immersive
# [X3D] version=3.0
# [X3D] noNamespaceSchemaLocation=https://www.web3d.org/specifications/x3d-3.0.xsd
# [head]

META "title" "DoubleClickTouchSensorPrototype.x3d"
META "description" "Double-click TouchSensor design pattern, implemented as a reusable prototype node."
META "creator" "Don Brutzman"
META "created" "26 May 2004"
META "modified" "6 June 2020"
META "reference" "DoubleClickTouchSensorExample.x3d"
META "reference" "https://www.web3d.org/x3d/specifications/ISO-IEC-19775-FDIS-X3dAbstractSpecification/Part01/components/pointingsensor.html#TouchSensor"
META "subject" "DoubleClickTouchSensor"
META "identifier" "https://savage.nps.edu/Savage/Tools/Animation/DoubleClickTouchSensorPrototype.x3d"
META "generator" "X3D-Edit 3.2, https://savage.nps.edu/X3D-Edit"
META "license" "../../license.html"

# [Scene] ========== ========== ==========

NavigationInfo { type [ "EXAMINE" "ANY" ] } ###  Default X3D NavigationInfo

WorldInfo {
  title "DoubleClickTouchSensorPrototype.x3d"
}
PROTO DoubleClickTouchSensor [
  # [appinfo] DoubleClickTouchSensor functionality activates when user double clicks (or double selects) within maxDelayInterval

  inputOutput    SFString	 description ""    # [appinfo] describe the purpose of this sensor

  initializeOnly SFTime	 maxDelayInterval 0.5    # [appinfo] seconds

  inputOutput    SFBool	 enabled TRUE
  outputOnly     SFBool	 isActive
  outputOnly     SFBool	 isOver
  outputOnly     SFTime	 touchTime    # [appinfo] seconds

  outputOnly     SFVec3f	 hitPoint_changed
  outputOnly     SFVec3f	 hitNormal_changed
  outputOnly     SFVec2f	 hitTexCoord_changed
  initializeOnly SFNode       metadata NULL    # [appinfo] can contain one of Metadata nodes

    # initialization node (if any) goes here

  initializeOnly SFBool	 traceEnabled FALSE
] {
  DEF TouchSensorNode TouchSensor {
           ### Warning:  IS/connect ignored for nodeField='description' since not a supported field in VRML97 for parent TouchSensor
 ### description IS description
      enabled IS enabled
      isOver IS isOver
  }
  Group {
    children [
        DEF DoubleClickTouchScript Script {
          inputOutput    SFString	 description IS description
          inputOnly      SFBool	 checkClicks
          initializeOnly SFTime	 maxDelayInterval IS maxDelayInterval            # [appinfo] seconds

          initializeOnly SFTime	 priorTouchTime -1
          initializeOnly SFTime	 currentTouchTime -1
          initializeOnly SFNode       touchSensor             USE TouchSensorNode
            # [appinfo] permits controlled access to various TouchSensorNode fields
          outputOnly     SFBool	 isActive IS isActive
          outputOnly     SFTime	 touchTime IS touchTime            # [appinfo] seconds

          outputOnly     SFVec3f	 hitPoint_changed IS hitPoint_changed
          outputOnly     SFVec3f	 hitNormal_changed IS hitNormal_changed
          outputOnly     SFVec2f	 hitTexCoord_changed IS hitTexCoord_changed
          initializeOnly SFBool	 traceEnabled IS traceEnabled
          directOutput TRUE
                                                                                                          
	url [ "ecmascript: // ### X3D Browser.print() not supported by all VRML97 viewers, instead simply using print()


//  inputOnly events are handled by functions,
//  initializeOnly fields are variable objects,
//  outputOnly events are sent by setting values

function initialize ()
{
	tracePrint ('initialize (); enabled=' + touchSensor.enabled);
}

// trigger on isActive to filter touchTime events when unclicking

function checkClicks (value, timestamp)  // activated from TouchSensorNode.isActive
{
	if (value == false) // doubleClick isActive=false events
	{
		if (isActive == true) // need to unclick
		{
			isActive  = false;	// send output events
			touchTime = timestamp;
			tracePrint ('DoubleClick isActive=false;');
		}
		return;
	}
	priorTouchTime = currentTouchTime;
	currentTouchTime = timestamp;
	computedDelay = (currentTouchTime - priorTouchTime);

	if      (priorTouchTime == -1)
	{
		tracePrint ('priorTouchTime == -1, return;');
		return;
	}
	else if (computedDelay <= maxDelayInterval)
	{
		tracePrint ('computedDelay=' + computedDelay + ', DoubleClick isActive=true;');

		isActive  = true;	// send output events
		touchTime = timestamp;
		hitPoint_changed    = touchSensor.hitPoint_changed;
		hitNormal_changed   = touchSensor.hitNormal_changed;
		hitTexCoord_changed = touchSensor.hitTexCoord_changed;
	}
	else
	{
		tracePrint ('computedDelay=' + computedDelay + ', single click');
		return;
	}

}
function set_description (newDescription)
{
    description = newDescription;
}
function tracePrint (outputString)
{
	if (traceEnabled) Browser.println ('[DoubleClickTouchSensor] ' + outputString);
}

          
" ]
        }
        DEF MetadataHolder Collision {
          enabled FALSE
                      proxy IS metadata
        }
    ]
  ROUTE TouchSensorNode.isActive TO DoubleClickTouchScript.checkClicks
  }
}
# ======================================
# Example use
Anchor {
  description "DoubleClickTouchSensor Example"
  parameter [ "target=_blank" ]
  url [ "DoubleClickTouchSensorExample.x3d" "https://savage.nps.edu/Savage/Tools/Animation/DoubleClickTouchSensorExample.x3d" "DoubleClickTouchSensorExample.wrl" "https://savage.nps.edu/Savage/Tools/Animation/DoubleClickTouchSensorExample.wrl" ]
  children [
      Shape {
        geometry Text {
          string [ "DoubleClickTouchSensorPrototype" "defines a prototype" "" "Click text to see" "DoubleClickTouchSensorExample scene" ]
          fontStyle FontStyle {
            justify [ "MIDDLE" "MIDDLE"  ] 
            size 0.7
          }
        }
        appearance Appearance {
          material Material {
            diffuseColor 1 1 0.2
          }
        }
      }
  ]
}