| 1 |
<?xml version="1.0" encoding="UTF-8"?>
|
| 2 |
<!DOCTYPE X3D PUBLIC "ISO//Web3D//DTD X3D 3.3//EN" "https://www.web3d.org/specifications/x3d-3.3.dtd">
|
| 3 | <X3D profile='Interchange' version='3.3' xmlns:xsd='http://www.w3.org/2001/XMLSchema-instance' xsd:noNamespaceSchemaLocation='https://www.web3d.org/specifications/x3d-3.3.xsd'> |
| 4 | <head> |
| 5 | <meta name='title' content='NormalInterpolatorExample.x3d'/> |
| 6 | <meta name='description' content='Example normal (perpendicular vector) animation, where orange vectors show normal direction at each polygon vertex.'/> |
| 7 | <meta name='creator' content='Don Brutzman'/> |
| 8 | <meta name='created' content='3 May 2008'/> |
| 9 | <meta name='modified' content='25 August 2023'/> |
| 10 | <meta name='reference' content='https://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter19-NormalsShading/Figure19.27SquareFaceAnimatingNormals.x3d'/> |
| 11 | <meta name='subject' content='X3D NormalInterpolator example'/> |
| 12 | <meta name='identifier' content='https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter07EventAnimationInterpolation/NormalInterpolatorExample.x3d'/> |
| 13 | <meta name='generator' content='X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit'/> |
| 14 | <meta name='license' content='../license.html'/> |
| 15 | </head> |
Index for DEF nodes:
AnimatedNormalNode,
Clock,
FlatSquare,
LightBlue,
NormalPath,
NormalVectors,
NormalVectorsAnimation
| 16 | <Scene> |
| 17 | <WorldInfo title='NormalInterpolatorExample.x3d'/> |
| 18 | <Viewpoint description='Animating normals on right vertices of a quadrilateral' position='0 0 8'/> |
| 19 | <Viewpoint description='Other side - note difference in animated shading' orientation='0 1 0 3.14159' position='0 0 -7'/> |
| 20 | <Shape> |
| 21 | <IndexedFaceSet DEF='FlatSquare' solid='false' coordIndex='0 1 2 3' normalIndex='0 1 2 3'> |
| 22 | <Coordinate point='-2 -2 0 2 -2 0 2 2 0 -2 2 0'/> |
| 23 | <!-- Normal vector with 4 SFVec3f triplet values, one for each corner of quadrilateral --> |
| 24 |
<!-- ROUTE information for AnimatedNormalNode node:
[from NormalPath.value_changed to set_vector
]
-->
<Normal DEF='AnimatedNormalNode' vector='0 0 1 0 0 1 0 0 1 0 0 1'/> |
| 25 | </IndexedFaceSet> |
| 26 | <Appearance> |
| 27 | <Material DEF='LightBlue' diffuseColor='0.3 0.6 0.9'/> |
| 28 | </Appearance> |
| 29 | </Shape> |
| 30 | <!-- NormalInterpolator keyValue array must match sizes of target Normal vector and key arrays --> |
| 31 | <!-- Thus this keyValue array has 4 * 3 = 12 total SFVec3f triplet values --> |
| 32 |
<!-- ROUTE information for NormalPath node:
[from Clock.fraction_changed to set_fraction
]
[from value_changed to AnimatedNormalNode.set_vector
]
-->
<NormalInterpolator DEF='NormalPath' key='0 0.5 1' keyValue='0 0 1 0 0 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 0 0 1 0 0 1 0 0 1 0 0 1'/> |
| 33 | < ROUTE fromNode='NormalPath' fromField='value_changed' toNode='AnimatedNormalNode' toField='set_vector'/> |
| 34 |
<!-- ROUTE information for Clock node:
[from fraction_changed to NormalPath.set_fraction
]
[from fraction_changed to NormalVectorsAnimation.set_fraction
]
-->
<TimeSensor DEF='Clock' cycleInterval='8' loop='true'/> |
| 35 | < ROUTE fromNode='Clock' fromField='fraction_changed' toNode='NormalPath' toField='set_fraction'/> |
| 36 | <!-- This block above completes the primary functionality of this scene. More to follow, however! --> |
| 37 | <!-- ============================================================================================================== --> |
| 38 | <!-- Note that a Normal is not rendered - it is invisible. So this scene adds some lines to visualize what is happening. --> |
| 39 | <Shape> |
| 40 | <IndexedLineSet coordIndex='0 1 -1 2 3 -1 4 5 -1 6 7 -1'> |
| 41 |
<!-- ROUTE information for NormalVectors node:
[from NormalVectorsAnimation.value_changed to point
]
-->
<Coordinate DEF='NormalVectors' point='-2 -2 0 -2 -2 1 2 -2 0 2 -2 1 2 2 0 2 2 1 -2 2 0 -2 2 1'/> |
| 42 | </IndexedLineSet> |
| 43 | <Appearance> |
| 44 | <Material emissiveColor='0.9 0.6 0.1'/> |
| 45 | </Appearance> |
| 46 | </Shape> |
| 47 |
<!-- ROUTE information for NormalVectorsAnimation node:
[from Clock.fraction_changed to set_fraction
]
[from value_changed to NormalVectors.point
]
-->
<CoordinateInterpolator DEF='NormalVectorsAnimation' key='0 0.5 1' keyValue='-2 -2 0 -2 -2 1 2 -2 0 2 -2 1 2 2 0 2 2 1 -2 2 0 -2 2 1 -2 -2 0 -2 -2 1 2 -2 0 3 -2 0 2 2 0 3 2 0 -2 2 0 -2 2 1 -2 -2 0 -2 -2 1 2 -2 0 2 -2 1 2 2 0 2 2 1 -2 2 0 -2 2 1'/> |
| 48 | < ROUTE fromNode='NormalVectorsAnimation' fromField='value_changed' toNode='NormalVectors' toField='point'/> |
| 49 | < ROUTE fromNode='Clock' fromField='fraction_changed' toNode='NormalVectorsAnimation' toField='set_fraction'/> |
| 50 | </Scene> |
| 51 | </X3D> |
Index for DEF nodes:
AnimatedNormalNode,
Clock,
FlatSquare,
LightBlue,
NormalPath,
NormalVectors,
NormalVectorsAnimation
Event Graph ROUTE Table with 4 ROUTE connections total, showing X3D event-model relationships for this scene.
Each row shows an event cascade that may occur during a single timestamp interval between frame renderings, as part of the X3D execution model.
|
Clock
TimeSensor fraction_changed SFFloat |
NormalPath
NormalInterpolator set_fraction SFFloat |
then
|
NormalPath
NormalInterpolator value_changed MFVec3f |
AnimatedNormalNode
Normal set_vector MFVec3f |
||
|
Clock
TimeSensor fraction_changed SFFloat |
NormalVectorsAnimation
CoordinateInterpolator set_fraction SFFloat |
then
|
NormalVectorsAnimation
CoordinateInterpolator value_changed MFVec3f |
NormalVectors
Coordinate point MFVec3f |
<!--
Color legend: X3D terminology
<X3dNode
DEF='idName' field='value'/>
matches XML terminology
<XmlElement
DEF='idName' attribute='value'/>
(Light-blue background: event-based behavior node or statement)
(Grey background inside box: inserted documentation)
(Magenta background: X3D Extensibility)
-->
<!--
For additional help information about X3D scenes, please see X3D Tooltips, X3D Resources, and X3D Scene Authoring Hints.
-->
