public class SoColorMap extends SoNode
SoIndexedTexture2
node and colors.
The data value coming from the SoIndexedTexture2
node is used as an index into the color map defined by the colorMap
field or the predefinedColorMap
field.
The predefinedColorMap
field allows you to specify a predefined color map or using value NONE, that the color map is contained in the colorMap
field.
The min
and max
fields define the range of the data values that will actually be used. The color map is modified such that only data values ranging from min
to max
will be mapped to the color map. The figure below illustrates the effects of these fields:
The SoColorMap
node acts like an SoShaderProgram
with an SoFragmentShader
. Standard Open Inventor operations on textures will be disabled on all subsequent nodes, thus using an SoTexture2
node or multitexturing after this node will not give the expected result.
NOTE:
SoColorMap
node must be inserted before the SoIndexedTexture2
.
SoColorMap
is only used to color SoIndexedTexture2
nodes. To specify a color map for volume rendering, see SoTransferFunction
.
The following example shows how to apply an indexed texture on a geometry node:
SoColorMap colorMap = new SoColorMap(); colorMap.predefinedColorMap.setValue( SoColorMap.PredefinedColorMaps.TEMPERATURE ); colorMap.min.setValue( -1000 ); colorMap.max.setValue( 20000 ); SoIndexedTexture2 indexedTexture = new SoIndexedTexture2(); indexedTexture.imageIndex.setValue(size, SoSFArray.DataTypes.SIGNED_SHORT, data); root.addChild( colorMap ); root.addChild( indexedTexture ); root.addChild( geometry );
File format/default:
ColorMap {
min | 0 |
max | 0 |
predefinedColorMap | TEMPERATURE |
colorMapFormat | RGB_ALPHA |
colorMap | 0 |
Action behavior:
SoGLRenderAction
, SoCallbackAction
Sets: SoColorMapElement
See also:
Modifier and Type | Class and Description |
---|---|
static class |
SoColorMap.ColorMapFormats
Color map format.
|
static class |
SoColorMap.Interpolations
The colormap interpolation type.
|
static class |
SoColorMap.PredefinedColorMaps
Predefined color map.
|
SoNode.RenderModes
Inventor.ConstructorCommand
Modifier and Type | Field and Description |
---|---|
SoMFFloat |
colorMap
Array of floats in range [0,1].
|
SoSFEnum<SoColorMap.ColorMapFormats> |
colorMapFormat
Indicates the format of the color map (number of color components).
|
SoSFEnum<SoColorMap.Interpolations> |
interpolation
The colormap interpolation type.
|
SoSFFloat |
max
See
min . |
SoSFFloat |
min
This field allow to remap the color map such that only data values ranging from min to max will be mapped to the color map.
|
SoSFEnum<SoColorMap.PredefinedColorMaps> |
predefinedColorMap
Use this field to load predefined color maps.
|
VERBOSE_LEVEL, ZeroHandle
Constructor and Description |
---|
SoColorMap()
Constructor.
|
Modifier and Type | Method and Description |
---|---|
int |
getNumColor()
This convenience method returns the number of colors in the color map (ie: colorMap.getNum()/Number of components or 256 if a predefined color map is used)
|
boolean |
hasTransparency()
Returns true if the current color map contains alpha values less than 1.
|
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
copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults
dispose, getName, isDisposable, isSynchronizable, setName, setSynchronizable
getNativeResourceHandle
public final SoSFFloat min
SoIndexedTexture2
node.
Values less than min and greater than max will be set to colorMap[0] and colorMap[colorMap.getNum()-1] respectively. If min is less than the minimum of the indexed texture minValue , it will be clamped to this minimum. If max is greater than the maximum of the indexed texture maxValue , it will be clamped to this maximum. When min
and max
are equal to 0 (the default), the entire range of data values is used.
Setting (min,max) to (64,192) while the predefined STANDARD color map is selected and in the case of a UNSIGNED_BYTE indexed texture will make the color map as shown:
public final SoSFEnum<SoColorMap.PredefinedColorMaps> predefinedColorMap
<TABLE border=0 cellspacing=0 cellpadding=5> <TR><TD valign=_top> GRAY <TD valign=_top> @image html grayColorMap.jpg <TR><TD valign=_top> TEMPERATURE <TD valign=_top> @image html temperatureColorMap.jpg <TR><TD valign=_top> PHYSICS <TD valign=_top> @image html physicsColorMap.jpg <TR><TD valign=_top> STANDARD <TD valign=_top> @image html standardColorMap.jpg <TR><TD valign=_top> GLOW <TD valign=_top> @image html glowColorMap.jpg <TR><TD valign=_top> BLUE_RED <TD valign=_top> @image html blue_redcolormap.jpg <TR><TD valign=_top> SEISMIC <TD valign=_top> @image html seismicColorMap.jpg <TR><TD valign=_top> BLUE_WHITE_RED <TD valign=_top> @image html blue_white_redcolormap.jpg <TR><TD valign=_top> INTENSITY <TD valign=_top> @image html intensityColorMap.jpg <TR><TD valign=_top> LABEL_256 <TD valign=_top> @image html label_256ColorMap.jpg <TR><TD valign=_top> VOLREN_RED <TD valign=_top> @image html volrenRedColorMap.jpg <TR><TD valign=_top> VOLREN_GREEN <TD valign=_top> @image html volrenGreenColorMap.jpg <TR><TD valign=_top> AIRWAY <TD valign=_top> @image html airwayColorMap.jpg <TR><TD valign=_top> AIRWAY_SURFACES <TD valign=_top> @image html airwaySurfaceColorMap.jpg </TABLE>
NOTE: In the images above the checkerboard pattern shows through where the color map alpha (opacity) value is less than 1.0.
If it is set to NONE, the fields below must be set.
public final SoSFEnum<SoColorMap.ColorMapFormats> colorMapFormat
LUMINANCE means one component per color for a grayscale color map.
ALPHA means one alpha component per color.
LUMINANCE_ALPHA means two components per color, luminance and alpha. In such a case the colorMap float array contains a list of two floats. Index 0 is luminance, index 1 is alpha, index 2 is luminance, index 3 is alpha and so on.
RGB means three components per color, ordered red first, then green and blue.
RGB_ALPHA means four components per color, ordered red first, then green, blue, and alpha.
An alpha value equal to zero means "fully transparent", an alpha value equal to one means "opaque".
public final SoMFFloat colorMap
colorMapFormat
. It is equal to the number of colors defined multiplied by the number of components per color. For example, for an RGBA color map of length n, there should be 4*n float values in the field. If a predefined color map is specified, the values of this field are not used.public final SoSFEnum<SoColorMap.Interpolations> interpolation
public int getNumColor()
public boolean hasTransparency()
Generated on July 31, 2019, Copyright © Thermo Fisher Scientific. All rights reserved. http://www.openinventor.com