60 lines
2.1 KiB
C#
60 lines
2.1 KiB
C#
using Godot;
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namespace FOU.Scripts.Elements;
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public abstract class Liquid : Element {
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public const int MAX_VERTICAL_SPREAD = 3;
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protected Liquid(int x, int y, ref Chunk chunk) : base(x, y, chunk) {
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MarkForUpdate();
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}
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public override bool Update() {
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if (!base.Update()) return false;
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Tick();
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return true; // not necessarily end, subclasses could do some more things
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}
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protected virtual void Tick() {
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Vector2I randomDirection = RandomDirectionDown();
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if (randomDirection.Y != 0)
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randomDirection *= Vector2I.Left * (int)(GD.Randi() % MAX_VERTICAL_SPREAD);
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if (Chunk.IsEmpty(Position + Vector2I.Down))
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Chunk.Swap(this, Position + Vector2I.Down);
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else if (Chunk.IsEmpty(Position + randomDirection))
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Chunk.Swap(this, Position + randomDirection);
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else if (Chunk.IsEmpty(Position + randomDirection * VERTICAL_OPPOSITE))
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Chunk.Swap(this, Position + randomDirection * VERTICAL_OPPOSITE);
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else if (Chunk.IsEmpty(Position + 1 * randomDirection))
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Chunk.Swap(this, Position + 1 * randomDirection);
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else if (Chunk.IsEmpty(Position - 1 * randomDirection * VERTICAL_OPPOSITE))
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Chunk.Swap(this, Position - 1 * randomDirection * VERTICAL_OPPOSITE);
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else if (Chunk.IsEmpty(Position + 2 * randomDirection))
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Chunk.Swap(this, Position + 2 * randomDirection);
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else if (Chunk.IsEmpty(Position - 2 * randomDirection * VERTICAL_OPPOSITE))
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Chunk.Swap(this, Position - 2 * randomDirection * VERTICAL_OPPOSITE);
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}
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public override void ActivateNeighbors() {
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Element n = Chunk.Get(Position + Vector2I.Up);
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if (n != null && !n.IsEmpty())
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n.Active = true;
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// only activate liquids left or right
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Element e = Chunk.Get(Position + Vector2I.Right);
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if (e != null && e.GetType() == typeof(Liquid))
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e.Active = true;
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Element s = Chunk.Get(Position + Vector2I.Down);
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if (null != s && s.GetType() == typeof(Liquid))
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s.Active = true;
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}
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}
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