using Core.Utilities;
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using UnityEngine;
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namespace TowerDefense.Towers.Placement
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{
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/// <summary>
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/// An interface for a placement area that can contain a tower
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/// </summary>
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public interface IPlacementArea
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{
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/// <summary>
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/// Gets this object's transform
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/// </summary>
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Transform transform { get; }
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/// <summary>
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/// 获取当前PlaceMentArea的Size.
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/// </summary>
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IntVector2 getdimsize();
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/// <summary>
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/// 获取一个可以放置塔防的位置.
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/// </summary>
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/// <returns></returns>
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IntVector2 getFreePos(int xdim,int ydim,bool forceGet = false );
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/// <summary>
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/// 获取对应位置的充能子弹界面指针.
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/// </summary>
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/// <param name="x"></param>
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/// <returns></returns>
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BulletUICtl GetBulletUICtl(int x);
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/// <summary>
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/// 获取对应位置的能量条界面指针.
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/// </summary>
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/// <param name="x"></param>
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/// <returns></returns>
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EnergyUICtl GetEnergyUICtl(int x);
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/// <summary>
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/// 是否空置的攻击位
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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bool isFreeAtackPos(int x, int y);
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/// <summary>
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/// 是否有已开启的可放置攻击位置。
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/// </summary>
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/// <returns></returns>
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bool hasFreeAttackPos();
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/// <summary>
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/// 是否是等待购买的攻击塔位.
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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bool isWaitBuyGrid(int x, int y);
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void startCoinGenMode();
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/// <summary>
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/// 购买对应的待购攻击塔位.
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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bool buyWaitBuyGrid(int x, int y);
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/// <summary>
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/// 设置某一个格子为已破坏塔位。
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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bool SetDestroyedGrid(int x, int y );
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/// <summary>
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/// 设置格子为合成状态。
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/// </summary>
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/// <param name="x"></param>
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/// <param name="y"></param>
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/// <returns></returns>
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bool SetComboGrid(int x, int y);
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/// <summary>
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/// 设置塔位的血条血量数据
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/// </summary>
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/// <param name="ix"></param>
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/// <param name="health"></param>
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void setTowerPosHealth(int ix, float health);
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/// <summary>
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/// Calculates the grid position from a given world position, offset to center for a specific size object
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/// </summary>
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IntVector2 WorldToGrid(Vector3 worldPosition, IntVector2 sizeOffset);
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/// <summary>
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/// Calculates the snapped world position from a given grid position
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/// </summary>
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Vector3 GridToWorld(IntVector2 gridPosition, IntVector2 sizeOffset);
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/// <summary>
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/// 当前是否是反方的TowerPlacementGrid.
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/// </summary>
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bool isOpponent();
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/// <summary>
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/// Gets whether an object of a given size would fit on this grid at the given location
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/// </summary>
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/// <param name="gridPos">The grid location</param>
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/// <param name="size">The size of the item</param>
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/// <returns>True if the item would fit at <paramref name="gridPos"/></returns>
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TowerFitStatus Fits(IntVector2 gridPos, IntVector2 size);
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/// <summary>
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/// Occupy the given space on this placement area
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/// </summary>
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/// <param name="gridPos">The grid location</param>
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/// <param name="size">The size of the item</param>
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void Occupy(IntVector2 gridPos, IntVector2 size);
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/// <summary>
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/// Clear the given space on this placement area
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/// </summary>
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/// <param name="gridPos">The grid location</param>
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/// <param name="size">The size of the item</param>
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void Clear(IntVector2 gridPos, IntVector2 size);
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}
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public static class PlacementAreaExtensions
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{
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/// <summary>
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/// Snaps a given world positionn to this grid
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/// </summary>
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public static Vector3 Snap(this IPlacementArea placementArea, Vector3 worldPosition, IntVector2 sizeOffset)
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{
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// Calculate the nearest grid location and then change that back to world space
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return placementArea.GridToWorld(placementArea.WorldToGrid(worldPosition, sizeOffset), sizeOffset);
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}
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}
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}
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