The RenderableStars class requires a few different data variables in the SPECK file. The mapping between internal name and the name of the variable in the SPECK file can be specified in the .asset file. The combination of selected rendering parameter determine which values are necessary:
| Size Composition | Color Option | Required Data Value |
|---|---|---|
| App Brightness | Color | luminance |
| Lum and Size | Color | bv, luminance, absoluteMagnitude |
| Lum, Size and App Brightness | Color | bv, luminance, absoluteMagnitude |
| Abs Magnitude | Color | bv, absoluteMagnitude |
| App Magnitude | Color | bv, absoluteMagnitude |
| Distance Modulus | Color | bv, absoluteMagnitude |
| App Brightness | Velocity | luminance, vx, vy, vz |
| Lum and Size | Velocity | luminance, absoluteMagnitude, vx, vy, vz |
| Lum, Size and App Brightness | Velocity | bv, luminance, absoluteMagnitude, vx, vy, vz |
| Abs Magnitude | Velocity | absoluteMagnitude, vx, vy, vz |
| App Magnitude | Velocity | absoluteMagnitude, vx, vy, vz |
| Distance Modulus | Velocity | absoluteMagnitude, vx, vy, vz |
| App Brightness | Speed | luminance, speed |
| Lum and Size | Speed | luminance, absoluteMagnitude, speed |
| Lum, Size and App Brightness | Speed | bv, luminance, absoluteMagnitude, speed |
| Abs Magnitude | Speed | absoluteMagnitude, speed |
| App Magnitude | Speed | absoluteMagnitude, speed |
| Distance Modulus | Speed | absoluteMagnitude, speed |
| App Brightness | Other Data | luminance, |
| Lum and Size | Other Data | luminance, absoluteMagnitude, |
| Lum, Size and App Brightness | Other Data | bv, luminance, absoluteMagnitude, |
| Abs Magnitude | Other Data | absoluteMagnitude, |
| App Magnitude | Other Data | absoluteMagnitude, |
| Distance Modulus | Other Data | absoluteMagnitude, |
| App Brightness | Fixed Color | luminance |
| Lum and Size | Fixed Color | luminance, absoluteMagnitude |
| Lum, Size and App Brightness | Fixed Color | bv, luminance, absoluteMagnitude |
| Abs Magnitude | Fixed Color | absoluteMagnitude |
| App Magnitude | Fixed Color | absoluteMagnitude |
| Distance Modulus | Fixed Color | absoluteMagnitude |
The bold values denote the default value for the stars.asset distributed with OpenSpace