doodle/pkg/scripting/supervisor_events.go

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package scripting
import "git.kirsle.net/go/render"
/*
RegisterEventHooks attaches the supervisor level event hooks into a JS VM.
Names registered:
- EndLevel(): for a doodad to exit the level. Panics if the OnLevelExit
handler isn't defined.
- FailLevel(): for a doodad to cause a level failure.
- SetCheckpoint(): update the player's respawn location.
*/
func RegisterEventHooks(s *Supervisor, vm *VM) {
vm.Set("EndLevel", func() {
if s.onLevelFail == nil {
panic("JS FailLevel(): No OnLevelFail handler attached to script supervisor")
}
s.onLevelExit()
})
vm.Set("FailLevel", func(message string) {
if s.onLevelFail == nil {
panic("JS FailLevel(): No OnLevelFail handler attached to script supervisor")
}
s.onLevelFail(message)
})
vm.Set("SetCheckpoint", func(p render.Point) {
if s.onSetCheckpoint == nil {
panic("JS SetCheckpoint(): No OnSetCheckpoint handler attached to script supervisor")
}
s.onSetCheckpoint(p)
})
}
// OnLevelExit registers an event hook for when a Level Exit doodad is reached.
func (s *Supervisor) OnLevelExit(handler func()) {
s.onLevelExit = handler
}
// OnLevelFail registers an event hook for level failures (doodads killing the player).
func (s *Supervisor) OnLevelFail(handler func(string)) {
s.onLevelFail = handler
}
// OnSetCheckpoint registers an event hook for setting player checkpoints.
func (s *Supervisor) OnSetCheckpoint(handler func(render.Point)) {
s.onSetCheckpoint = handler
}