34 lines
970 B
Go
34 lines
970 B
Go
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package cube
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import "math"
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// Orientation represents the rotation of a block divided into 16 options.
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type Orientation int
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// OrientationFromYaw returns an Orientation value that (roughly) matches the
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// yaw passed.
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func OrientationFromYaw(yaw float64) Orientation {
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yaw = math.Mod(yaw, 360)
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return Orientation(math.Round(yaw / 360 * 16))
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}
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// Yaw returns the yaw value that matches the orientation.
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func (o Orientation) Yaw() float64 {
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return float64(o) / 16 * 360
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}
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// Opposite returns the opposite orientation value of the Orientation.
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func (o Orientation) Opposite() Orientation {
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return OrientationFromYaw(o.Yaw() + 180)
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}
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// RotateLeft rotates the orientation left by 90 degrees and returns it.
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func (o Orientation) RotateLeft() Orientation {
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return OrientationFromYaw(o.Yaw() - 90)
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}
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// RotateRight rotates the orientation right by 90 degrees and returns it.
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func (o Orientation) RotateRight() Orientation {
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return OrientationFromYaw(o.Yaw() + 90)
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}
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