fsMapViewSetWeatherRadarColorAlphaEnabled
This function can be used to enable the use of alpha channel values for rain rate colors set by fsMapViewSetWeatherRadarRainColors. Applies to weather radar maps in the horizontal (FS_MAP_VIEW_WEATHER_RADAR_MODE_HORIZONTAL) and vertical (FS_MAP_VIEW_WEATHER_RADAR_MODE_VERTICAL) mode. By default, this is disabled and alpha values are ignored (set to 1). For alpha blending information, see Remarks.
Syntax
bool fsMapViewSetWeatherRadarColorAlphaEnabled(
FsContext ctx,
FsTextureId id,
bool bEnabled
);Members
| Parameters | Description |
|---|---|
ctx | A value of type FsContext provided as an argument of the gauge callback. |
id | The MapView render ID as returned by the function fsMapViewCreate. |
bEnabled | Whether the alpha channel should be enabled or not. |
Return Values
Returns false if:
- no texture matches the given MapView ID
- the
ctxis invalid
Otherwise it will return true.
Remarks
In order to get correct alpha blending (for rain rate colors with alpha values different than 0 and 1), the map view must be created with the FS_RENDER_IMAGE_PREMULTIPLIED image flag.