Mercator
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Surface shader that defines the surface above a given level. More...
#include <ThresholdShader.h>
Public Member Functions | |
HighShader (float threshold=default_threshold) | |
Constructor. More... | |
HighShader (const Parameters ¶ms) | |
Constructor. More... | |
const float | threshold () const |
Accessor for level above which the shader renders. | |
virtual bool | checkIntersect (const Segment &) const |
Check whether this Shader has any effect on the given Segment. More... | |
virtual void | shade (Surface &) const |
Populate a Surface with data. | |
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virtual | ~Shader () |
Destructor does nothing interesting. | |
bool | getColor () const |
Accessor for color flag. | |
bool | getAlpha () const |
Accessor for alpha flag. | |
Surface * | newSurface (const Segment &) const |
Create a new Surface which matches the requirements of this shader. More... | |
Static Public Attributes | |
static const std::string | key_threshold |
Key string used when specifying the threshold parameter. | |
static const float | default_threshold = 1.f |
Default level above which the shader renders. | |
Private Attributes | |
float | m_threshold |
The level above which the shader renders. | |
Additional Inherited Members | |
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typedef std::map< std::string, float > | Parameters |
STL map of parameter values for a shader constructor. | |
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Shader (bool color=false, bool alpha=true) | |
Protected constructor for classes which inherit from this one. More... | |
Surface shader that defines the surface above a given level.
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explicit |
Constructor.
threshold | level below which the shader renders. |
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explicit |
Constructor.
params | a map of parameters for the shader. |
References key_threshold, and m_threshold.
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virtual |
Check whether this Shader has any effect on the given Segment.
Implements Mercator::Shader.
References Mercator::Segment::getMax(), and m_threshold.
Referenced by Mercator::BandShader::highThreshold(), threshold(), and Mercator::LowShader::threshold().