OELinearColorGradient¶
class OELinearColorGradient : public OEColorGradientBase
The OELinearColorGradient class interpolates between colors that are defined by using the OEColorStop class. See Figure Example of linear color gradient
Example of linear color gradient with (-1.0, OERed), (0.0, OEWhite) and (+1.0, OEBlue) color stops
See also
- OEColorStop class
- OEExponentColorGradient class
- OEExponentialColorGradient class
- OELogarithmicColorGradient class
The following methods are publicly inherited from OEColorGradientBase:
| operator= | GetMaxColor | GetStops |
| AddStop | GetMaxValue | IsEmpty |
| DeleteStop | GetMinColor | NumStops |
| GetColorAt | GetMinValue | TransformValue |
Constructors¶
OELinearColorGradient()
Default constructor that creates an “empty” color gradient.
Note
An “empty” color gradient always returns the OEBlack color, when calling the OEColorGradientBase.GetColorAt, the OEColorGradientBase.GetMinColor or the OEColorGradientBase.GetMaxColor methods.
OELinearColorGradient(const OEColorStop &oneStop)
Creates an OELinearColorGradient object with one color stop. An OELinearColorGradient object that has only one color stop will always return that color when calling the OEColorGradientBase.GetColorAt method.
OELinearColorGradient(const OEColorStop &bgnStop, const OEColorStop &endStop)
Creates an OELinearColorGradient object with interpolation range between the two specified color stops.
OELinearColorGradient(const OELinearColorGradient &rhs)
Copy constructor.
TransformValue¶
double TransformValue(double value) const
Performs a \(f(x) = x\) linear transformation. This method is called by OEColorGradientBase.GetColorAt method to transform a value before performing color interpolation.