DiscreteRotationMath

public static final int fromSurfaceRotation(int surfaceRotation)

Get a DiscreteRotation from Surface rotation values.

public static final void requireDiscreteRotation(int degrees)

Throws an IllegalArgumentException if the given degrees is not one of 0, 90, 180, 270.

public static final int round(float degrees)

Round degrees to the nearest discrete rotation (0, 90, 180, 270). Negative values are rounded to the nearest positive discrete rotation value.

Example(s):

• 40.000f => 0°

• 44.990f => 0°

• 45.001f => 90°

• -40.00f° => 0° (Equivalent to -40.000f + 360 => round(320) => 0)

• -50.00f° => 270° (Equivalent to -50.000f + 360 => round(310) => 270)

public static final int round(int degrees)

Round degrees to the nearest discrete rotation (0, 90, 180, 270). Negative values are rounded to the nearest positive discrete rotation value.

Example(s):

• 40 => 0°

• 50 => 90°

• -40 => 0° (Equivalent to -40 + 360 => round(320) => 0)

• -50 => 270° (Equivalent to -50 + 360 => round(310) => 270°)