func (self *Transform) processMovement(deltaT float32, component *components.Transform) {
moveDir := component.MoveDir()
if component.MoveRelativeToRotation {
moveDir = component.Rotation.Inverse().TimesV(moveDir)
}
moveDir = moveDir.Times(component.Speed).Scale(deltaT)
component.Position = component.Position.Add(moveDir)
}
func (self *Transform) Update(deltaT float32) {
var transform *components.Transform
for _, entity := range self.entitySet.Entities() {
transform = components.GetTransform(entity)
if transform.UsingPositionOf == nil {
self.processMovement(deltaT, transform)
self.processRotation(deltaT, transform)
} else {
transform.Position = components.GetTransform(transform.UsingPositionOf).Position
}
}
}