68 lines
1.1 KiB
Go
68 lines
1.1 KiB
Go
package components
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import (
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. "openquell/config"
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)
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// movement in relation to position
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type Velocity struct {
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Data Position
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Direction int
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PointingAt int
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}
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func (velocity *Velocity) Set(new *Velocity) {
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velocity.Direction = new.Direction
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velocity.Data.Set(&new.Data)
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}
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func (velocity *Velocity) ResetDirectionAndStop() {
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velocity.Data.X = 0
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velocity.Data.Y = 0
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velocity.Direction = velocity.PointingAt
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}
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func (velocity *Velocity) Change(direction int) {
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switch direction {
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case East:
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velocity.Data.X = 1
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velocity.Data.Y = 0
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case West:
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velocity.Data.X = -1
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velocity.Data.Y = 0
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case South:
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velocity.Data.X = 0
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velocity.Data.Y = 1
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case North:
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velocity.Data.X = 0
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velocity.Data.Y = -1
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case Stop:
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velocity.Data.X = 0
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velocity.Data.Y = 0
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}
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velocity.Direction = direction
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}
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func (velocity *Velocity) Moving() bool {
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return velocity.Data.X != 0 || velocity.Data.Y != 0
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}
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func (velocity *Velocity) InvertDirection() int {
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switch velocity.Direction {
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case East:
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return West
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case West:
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return East
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case South:
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return North
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case North:
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return South
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case All:
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return Stop
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}
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// should not happen
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return All
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}
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