Battlesnake/Byte-snake-engine
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Add TeamRuleset (#13)

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This builds on work done by @dlsteuer in #10
This commit is contained in:
Brad Van Vugt 2020-02-20 10:24:44 -08:00 • committed by GitHub
parent 8153585f57
commit 44b6b94666
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 420 additions and 15 deletions
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25
standard.go
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@ -131,7 +131,7 @@ func (r *StandardRuleset) isKnownBoardSize(b *BoardState) bool {
return false
}
func (r *StandardRuleset) ResolveMoves(prevState *BoardState, moves []SnakeMove) (*BoardState, error) {
func (r *StandardRuleset) CreateNextBoardState(prevState *BoardState, moves []SnakeMove) (*BoardState, error) {
// We specifically want to copy prevState, so as not to alter it directly.
nextState := &BoardState{
Height: prevState.Height,
@ -160,7 +160,7 @@ func (r *StandardRuleset) ResolveMoves(prevState *BoardState, moves []SnakeMove)
}
// TODO: LOG?
err = r.eliminateSnakes(nextState)
err = r.maybeEliminateSnakes(nextState)
if err != nil {
return nil, err
}
@ -172,7 +172,7 @@ func (r *StandardRuleset) ResolveMoves(prevState *BoardState, moves []SnakeMove)
// of equal length actually show length + 1
// TODO: LOG?
err = r.feedSnakes(nextState)
err = r.maybeFeedSnakes(nextState)
if err != nil {
return nil, err
}
@ -256,7 +256,7 @@ func (r *StandardRuleset) reduceSnakeHealth(b *BoardState) error {
return nil
}
func (r *StandardRuleset) eliminateSnakes(b *BoardState) error {
func (r *StandardRuleset) maybeEliminateSnakes(b *BoardState) error {
// First order snake indices by length.
// In multi-collision scenarios we want to always attribute elimination to the longest snake.
snakeIndicesByLength := make([]int, len(b.Snakes))
@ -351,7 +351,7 @@ func (r *StandardRuleset) snakeHasLostHeadToHead(s *Snake, other *Snake) bool {
return false
}
func (r *StandardRuleset) feedSnakes(b *BoardState) error {
func (r *StandardRuleset) maybeFeedSnakes(b *BoardState) error {
newFood := []Point{}
for _, food := range b.Food {
foodHasBeenEaten := false
@ -364,10 +364,8 @@ func (r *StandardRuleset) feedSnakes(b *BoardState) error {
}
if snake.Body[0].X == food.X && snake.Body[0].Y == food.Y {
r.feedSnake(snake)
foodHasBeenEaten = true
// Update snake
snake.Body = append(snake.Body, snake.Body[len(snake.Body)-1])
snake.Health = SnakeMaxHealth
}
}
// Persist food to next BoardState if not eaten
@ -380,6 +378,17 @@ func (r *StandardRuleset) feedSnakes(b *BoardState) error {
return nil
}
func (r *StandardRuleset) feedSnake(snake *Snake) {
r.growSnake(snake)
snake.Health = SnakeMaxHealth
}
func (r *StandardRuleset) growSnake(snake *Snake) {
if len(snake.Body) > 0 {
snake.Body = append(snake.Body, snake.Body[len(snake.Body)-1])
}
}
func (r *StandardRuleset) maybeSpawnFood(b *BoardState) error {
if len(b.Food) == 0 || rand.Float32() <= FoodSpawnChance {
return r.spawnFood(b, 1)