64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
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package cube
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import "github.com/go-gl/mathgl/mgl64"
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// Axis represents the axis that a block, such as a log, may be directed in.
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type Axis int
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const (
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// Y represents the vertical Y axis.
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Y Axis = iota
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// Z represents the horizontal Z axis.
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Z
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// X represents the horizontal X axis.
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X
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)
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// String converts an Axis into either x, y or z, depending on which axis it is.
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func (a Axis) String() string {
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switch a {
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case X:
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return "x"
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case Y:
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return "y"
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default:
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return "z"
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}
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}
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// RotateLeft rotates an Axis from X to Z or from Z to X.
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func (a Axis) RotateLeft() Axis {
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switch a {
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case X:
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return Z
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case Z:
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return X
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default:
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return 0
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}
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}
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// RotateRight rotates an Axis from X to Z or from Z to X.
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func (a Axis) RotateRight() Axis {
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// No difference in rotating left or right for an Axis.
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return a.RotateLeft()
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}
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// Vec3 returns a unit Vec3 of either (1, 0, 0), (0, 1, 0) or (0, 0, 1),
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// depending on the Axis.
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func (a Axis) Vec3() mgl64.Vec3 {
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switch a {
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case X:
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return mgl64.Vec3{1, 0, 0}
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case Y:
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return mgl64.Vec3{0, 1, 0}
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default:
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return mgl64.Vec3{0, 0, 1}
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}
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}
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// Axes return all possible axes. (x, y, z)
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func Axes() []Axis {
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return []Axis{X, Y, Z}
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}
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