Mercator
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Surface shader that defines the surface between two levels. More...
#include <ThresholdShader.h>
Public Member Functions | |
BandShader (float low_threshold=default_lowThreshold, float high_threshold=default_highThreshold) | |
Constructor. | |
BandShader (const Parameters ¶ms) | |
Constructor. | |
const float | lowThreshold () const |
Accessor for the level above which the shader renders. | |
const float | highThreshold () const |
Accessor for the level below which the shader renders. | |
virtual bool | checkIntersect (const Segment &) const |
Check whether this Shader has any effect on the given Segment. | |
virtual void | shade (Surface &) const |
Populate a Surface with data. | |
Static Public Attributes | |
static const std::string | key_lowThreshold |
Key string used when specifying the low threshold parameter. | |
static const std::string | key_highThreshold |
Key string used when specifying the high threshold parameter. | |
static const float | default_lowThreshold = -1.f |
Default level above which the shader renders. | |
static const float | default_highThreshold = 1.f |
Default level below which the shader renders. | |
Private Attributes | |
float | m_lowThreshold |
The level above which the shader renders. | |
float | m_highThreshold |
The level below which the shader renders. |
Surface shader that defines the surface between two levels.
Mercator::BandShader::BandShader | ( | float | low_threshold = default_lowThreshold , |
float | high_threshold = default_highThreshold |
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) | [explicit] |
Constructor.
low_threshold | level above which the shader renders. |
high_threshold | level below which the shader renders. |
Mercator::BandShader::BandShader | ( | const Parameters & | params | ) | [explicit] |
Constructor.
params | a map of parameters for the shader. |
References key_highThreshold, key_lowThreshold, m_highThreshold, and m_lowThreshold.
bool Mercator::BandShader::checkIntersect | ( | const Segment & | ) | const [virtual] |
Check whether this Shader has any effect on the given Segment.
Implements Mercator::Shader.
References Mercator::Segment::getMax(), Mercator::Segment::getMin(), m_highThreshold, and m_lowThreshold.