Class SoIndexedFaceSet
- java.lang.Object
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- All Implemented Interfaces:
SafeDisposable
- Direct Known Subclasses:
SoGeoElevationGrid
,SoVolumeIndexedFaceSet
public class SoIndexedFaceSet extends SoIndexedShape
Indexed polygonal face shape node. This node represents a 3D shape formed by constructing faces (polygons) from vertices located at the coordinates specified in thevertexProperty
field (fromSoVertexShape
), or the current inherited state. For optimal performance, thevertexProperty
field is recommended.SoIndexedFaceSet
is a general purpose polygon rendering node. It can render triangles, quadrilaterals, and other types of polygons or any combination thereof.Tips:
- For best performance, arrange the faces with all triangles first, then all quadrilaterals, then general polygons.
- If the shape has only triangles, use
SoIndexedTriangleSet
instead (simpler and possibly faster).
SoIndexedFaceSet
supports both convex and non-convex polygons (unlike OpenGL). However polygons are assumed to be convex by default. Rendering non-convex polygons in this mode may produce incorrect results. Enable non-convex polygons using the faceType field of anSoShapeHints
node. In this modeSoIndexedFaceSet
will automatically convert non-convex polygons, if necessary, to faces that the hardware can handle.SoIndexedFaceSet
can also directly handle complex polygons with "holes". See the following paragraphs.If
SoShapeHints
is not used, or if windingType field fromSoShapeHints
is equal to NO_WINDING_TYPE,SoIndexedFaceSet
uses the indices in thecoordIndex
field (fromSoIndexedShape
) to specify simple polygonal faces. An index of SO_END_FACE_INDEX (-1) indicates that the current face has ended and the next one begins.If
SoShapeHints
is used with a windingType field other than NO_WINDING_TYPE,SoIndexedFaceSet
uses the indices in the coordIndex field (fromSoIndexedShape
) to specify complex polygonal faces (possibly) made up of multiple contours. An index of SO_END_CONTOUR_INDEX (-1) indicates that the current contour has ended and that the next one begins. An index of SO_END_POLYGON_INDEX (-2) indicates that the current complex face (group of contours) has ended. After the end of a complex face, you can create another complex face, and so on.The vertices of the faces are transformed by the current transformation matrix. The faces are drawn with the current light model and drawing style. Diffuse color and opacity may be specified using the orderedRGBA field of
SoVertexProperty
. Diffuse color, transparency and other color parameters used in the lighting equation may be specified usingSoMaterial
.Treatment of the current material and normal binding is as follows: The PER_PART and PER_FACE bindings specify a material or normal for each face. PER_VERTEX specifies a material or normal for each vertex. The corresponding _INDEXED bindings are the same, but use the
materialIndex
ornormalIndex
indices (seeSoIndexedShape
). The default material binding is OVERALL. The default normal binding is PER_VERTEX_INDEXED.If any normals (or materials) are specified, Open Inventor assumes you provide the correct number of them, as indicated by the binding. You will see unexpected results if you specify fewer normals (or materials) than the shape requires. If no normals are specified, they will be generated automatically.
Lighting is enabled by default (see
SoLightModel
). If lighting is enabled, by default only the "front face" of polygons are lit (the back face will be black). Which side is the front face is determined by the normal vector, if specified, else by the ordering of the vertices and the vertexOrdering field ofSoShapeHints
. You can also enable "two sided lighting" usingSoShapeHints
.If lighting is enabled and no normals are specified, they will be generated automatically. The normal generator computes "facet" or "smooth" (or a combination) normal vectors depending on the creaseAngle field of
SoShapeHints
.Textures may be applied using (for example)
SoTexture2
. Texture coordinates may be supplied usingSoVertexProperty
orSoTextureCoordinate2
. If a texture is applied and no texture coordinates were specified, they will be computed automatically. By default the computed coordinates map the texture to the axis-aligned bounding box of the shape, with the texture S axis corresponding to the longest axis of the box.Warning: The shape may not render or pick correctly if any of its polygons are self-intersecting or non-planar.
Limitations:
- Currently does not use OpenGL VBOs (vertex buffer objects) for rendering (and performance may be lower) when both texture coordinates and texture coordinate indices are specified. Just setting texture coordinates (indexed by the coordIndex values) is OK.
File format/default:
IndexedFaceSet {
vertexProperty NULL coordIndex -1 materialIndex -1 normalIndex -1 textureCoordIndex -1 Action behavior:
SoGLRenderAction
Draws faces based on the current coordinates, normals, materials, drawing style, and so on.SoRayPickAction
Picks faces based on the current coordinates and transformation. Details about the intersection are returned in anSoFaceDetail
.SoGetBoundingBoxAction
Computes the bounding box that encloses all vertices of the face set with the current transformation applied to them. Sets the center to the average of the coordinates of all vertices.SoCallbackAction
If any triangle callbacks are registered with the action, they will be invoked for each successive triangle generated from each face in the set.
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Nested Class Summary
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Nested classes/interfaces inherited from class com.openinventor.inventor.nodes.SoShape
SoShape.ShapeTypes
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Nested classes/interfaces inherited from class com.openinventor.inventor.nodes.SoNode
SoNode.RenderModes
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Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor
Inventor.ConstructorCommand
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Field Summary
Fields Modifier and Type Field Description static int
SO_END_FACE_INDEX
Value of an index inSoIndexedShape.coordIndex
indicating that the current face has ended and the next one begins.-
Fields inherited from class com.openinventor.inventor.nodes.SoIndexedShape
coordIndex, materialIndex, normalIndex, tangentIndex, textureCoordIndex
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Fields inherited from class com.openinventor.inventor.nodes.SoVertexShape
vertexProperty
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Fields inherited from class com.openinventor.inventor.nodes.SoShape
boundingBoxIgnoring
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Fields inherited from class com.openinventor.inventor.Inventor
VERBOSE_LEVEL, ZeroHandle
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Constructor Summary
Constructors Constructor Description SoIndexedFaceSet()
Creates an indexed face set node with default settings.
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Method Summary
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Methods inherited from class com.openinventor.inventor.nodes.SoVertexShape
getNormalCache, getTangentCache
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Methods inherited from class com.openinventor.inventor.nodes.SoShape
getShapeType, isPrimitiveRestartAvailable, isPrimitiveRestartAvailable
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Methods inherited from class com.openinventor.inventor.nodes.SoNode
affectsState, callback, copy, copy, distribute, doAction, getAlternateRep, getBoundingBox, getByName, getMatrix, getPrimitiveCount, getRenderEngineMode, getRenderUnitID, GLRender, GLRenderBelowPath, GLRenderInPath, GLRenderOffPath, grabEventsCleanup, grabEventsSetup, handleEvent, isBoundingBoxIgnoring, isOverride, pick, rayPick, search, setOverride, touch, write
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Methods inherited from class com.openinventor.inventor.fields.SoFieldContainer
copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults
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Methods inherited from class com.openinventor.inventor.misc.SoBase
dispose, getName, isDisposable, isSynchronizable, setName, setSynchronizable
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Methods inherited from class com.openinventor.inventor.Inventor
getNativeResourceHandle
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Field Detail
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SO_END_FACE_INDEX
public static final int SO_END_FACE_INDEX
Value of an index inSoIndexedShape.coordIndex
indicating that the current face has ended and the next one begins.- See Also:
- Constant Field Values
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