Unity3D仿星露谷物语开发43之农作物生长

1、目标

把防风草种子种在地里，并展示植物种子，防风草种子将随着时间变化而生长成植株。

2、创建Crop.cs脚本

在Assets -> Scripts下创建新的目录命名为Crop，在其下创建新的脚本命名为Crop.cs。

代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class Crop : MonoBehaviour
{[HideInInspector]public Vector2Int cropGridPosition;
}

3、创建CropDetails.cs脚本

在Assets -> Scripts -> Crop下创建CropDetails.cs脚本。

代码如下：

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;[System.Serializable]
public class CropDetails 
{[ItemCodeDescription]public int seedItemCode; // this is the item code for the corresponding seedpublic int[] growthDays; // days growth for each stagepublic int totalGrowthDays; // total growth dayspublic GameObject[] growthPrefab; // prefab to use when instantiating growth stagespublic Sprite[] growthSprite; // growth spritepublic Season[] seasons; // growth seasonspublic Sprite harvestedSprite; // sprite used once harvested[ItemCodeDescription]public int harvestedTransformItemCode; // if the item transform into another item when harvested this item code will be populatedpublic bool hideCropBeforeHarvestedAnimation; // if the crop should be disabled before the harvested animationpublic bool disableCropCollidersBeforeHarvestedAnimation; // if colliders on crop should be disabled to avoid the harvested animation effecting any other game objectspublic bool isHarvestedAnimation; // true if harvested animation to be played on final growth stage prefabpublic bool isHarvestActionEffect = false; // flag to determine whether there is a harvest action effectpublic bool spawnCropProducedAtPlayerPosition;public HarvestActionEffect harvestActionEffect; // the harvest action effect for the crop[ItemCodeDescription]public int[] harvestToolItemCode; // array of item codes for the tools that can harvest or 0 array elements if no tool requiredpublic int[] requiredHarvestActions; // number of harvest actions required for corresponding tool in harvest tool item code array[ItemCodeDescription]public int[] cropProducedItemCode; // array of item codes produced for the harvested croppublic int[] cropProducedMinQuantity; // array of minimum quantities produced for the harvested croppublic int[] cropProducedMaxQuantity; // if max quantity is > min quantity then a random number of crops between min and max are producedpublic int daysToRegrow; // days to regrow next crop or -1 if a single crop/// <summary>/// returns true if the tool item code can be used to harvest this crop, else returns false/// </summary>/// <param name="toolItemCode"></param>/// <returns></returns>public bool CanUseToolToHarvestCrop(int toolItemCode){if(RequiredHarvestActionsForTool(toolItemCode) == -1){return false;}else{return true;}}/// <summary>/// returns -1 if the tool can't be used to harvest this crop, else returns thhe number of harvest actions required by this tool/// </summary>/// <param name="toolItemCode"></param>/// <returns></returns>public int RequiredHarvestActionsForTool(int toolItemCode){for(int i = 0; i < harvestToolItemCode.Length; i++){if (harvestToolItemCode[i] == toolItemCode){return requiredHarvestActions[i];}}return -1;}}

4、创建SO_CropDetailsList.cs脚本

在Assets -> Scripts -> Crop下创建SO_CropDetailsList.cs脚本。

代码如下：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;[CreateAssetMenu(fileName ="CropDetailsList", menuName ="Scriptable Objects/Crop/Crop Details List")]
public class SO_CropDetailList : ScriptableObject
{[SerializeField]public List<CropDetails> cropDetails;public CropDetails GetCropDetails(int seedItemCode){return cropDetails.Find(x => x.seedItemCode == seedItemCode);}
}

5、填充防风草作物的数据

（1）制作Crop预制体

第1步，在Hierarchy -> PersistentScene下创建新的物体命名为CropStandard。

第2步，给该物体添加Box Collider 2D组件，并设置参数如下：

第3步，添加Crop组件和Item Nudge组件。

第4步，在CropStandard下创建子物体命名为CropSprite。

第5步，给CropSprite添加Sprite Renderer组件，并且设置参数如下：

如果Sorting Layer未设置未Instances，将导致seed无法正确显示（因为优先级不够）。

第6步，将Hierarchy下的CropStandard拖到Assets -> Prefabs -> Crop目录下，并且删除Hierarchy下的CropStandard。

（2）创建Crop的Scriptable资源

第1步，在Assets -> Scriptable Object Assets 下创建新的目录命名为Crop。

第2步，右击Crop目录，选择Scriptable Objects -> Crop -> Crop Details List，命名为so_CropDetailsList。

第3步，配置so_CropDetailsList的信息如下：

6、防风草生长

（1）优化Tags.cs脚本

添加一个变量：

public const string CropsParentTransform = "CropsParentTransform";

（2）添加Crops对象

首先，加载Scene1_Farm场景

然后，在Hierarchy -> Scene1_Farm下创建新的物体命名为Crops

接着，在Inspector界面下创建新的Tag：CropsParentTransform，并且指定Crops的Tag为新Tag。

最后，Unload Scene1_Farm场景。

对Scene2_Field场景进行同样的操作。

（3）优化EventHandler.cs脚本

添加新的事件如下：

// Remove selected item from inventory
public static event Action RemoveSelectedItemFromInventoryEvent;public static void CallRemoveSelectedItemFromInventoryEvent()
{if(RemoveSelectedItemFromInventoryEvent != null){RemoveSelectedItemFromInventoryEvent();}
}

（4）优化GridPropertiesManager.cs脚本

添加变量1：

private Transform cropParentTransform;

修改AfterSceneLoaded函数，添加如下代码：

if(GameObject.FindGameObjectWithTag(Tags.CropsParentTransform) != null)
{cropParentTransform = GameObject.FindGameObjectWithTag(Tags.CropsParentTransform).transform;
}
else
{cropParentTransform = null;
}

添加变量2：

[SerializeField] private SO_CropDetailList so_CropDetailList = null;

修改ClearDisplayGridPropertyDetails函数，添加如下代码：

private void ClearDisplayAllPlantedCrops()
{// Destory all crops in sceneCrop[] cropArray;cropArray = FindObjectsOfType<Crop>();   foreach(Crop crop in cropArray){Destroy(crop.gameObject);}}private void ClearDisplayGridPropertyDetails()
{ClearDisplayGroundDecorations();ClearDisplayAllPlantedCrops();
}

修改DisplayGridPropertyDetails函数，代码如下：

private void DisplayGridPropertyDetails()
{// Loop throught all grid itemsforeach(KeyValuePair<string, GridPropertyDetails> item in gridPropertyDictionary){GridPropertyDetails gridPropertyDetails = item.Value;DisplayDugGround(gridPropertyDetails);DisplayWateredGround(gridPropertyDetails);DisplayPlantedCrop(gridPropertyDetails);}
}public void DisplayPlantedCrop(GridPropertyDetails gridPropertyDetails)
{if(gridPropertyDetails.seedItemCode > -1){// get crop detailsCropDetails cropDetails = so_CropDetailList.GetCropDetails(gridPropertyDetails.seedItemCode);// prefab to useGameObject cropPrefab;// instantiate crop prefab at grid locationint growthStages = cropDetails.growthDays.Length;int currentGrowthStage = 0;int daysCounter = cropDetails.totalGrowthDays;// 找出目前所处的成长阶段for(int i = growthStages - 1; i >= 0; i--){if(gridPropertyDetails.growthDays >= daysCounter){currentGrowthStage = i;break;}daysCounter = daysCounter - cropDetails.growthDays[i];}cropPrefab = cropDetails.growthPrefab[currentGrowthStage];Sprite growthSprite = cropDetails.growthSprite[currentGrowthStage];Vector3 worldPosition = groundDecoration2.CellToWorld(new Vector3Int(gridPropertyDetails.gridX, gridPropertyDetails.gridY, 0));worldPosition = new Vector3(worldPosition.x + Settings.gridCellSize / 2, worldPosition.y, worldPosition.z);GameObject cropInstance = Instantiate(cropPrefab, worldPosition, Quaternion.identity);cropInstance.GetComponentInChildren<SpriteRenderer>().sprite = growthSprite;cropInstance.transform.SetParent(cropParentTransform);cropInstance.GetComponent<Crop>().cropGridPosition = new Vector2Int(gridPropertyDetails.gridX, gridPropertyDetails.gridY);}
}

修改AdvanceDay函数，代码如下：

private void AdvanceDay(int gameYear, Season gameSeason, int gameDay, string gameDayyOfWeek, int gameHour, int gameMinute, int gameSecond)
{// Clear Display All Grid Property DetailsClearDisplayGridPropertyDetails();// loop through all scenes - by looping through all gridproperty in the arrayforeach(SO_GridProperties so_GridProperties in so_gridPropertiesArray){// Get gridpropertydetails dictionary for sceneif(GameObjectSave.sceneData.TryGetValue(so_GridProperties.sceneName.ToString(), out SceneSave sceneSave)){if(sceneSave.gridPropertyDetailsDictionary != null){for(int i = sceneSave.gridPropertyDetailsDictionary.Count - 1; i >= 0; i--){KeyValuePair<string, GridPropertyDetails> item = sceneSave.gridPropertyDetailsDictionary.ElementAt(i);GridPropertyDetails gridPropertyDetails = item.Value;#region Update all grid properties to reflect the advance in the day// if a crop is plantedif(gridPropertyDetails.growthDays > -1){gridPropertyDetails.growthDays += 1;}// if ground is watered, then clear waterif(gridPropertyDetails.daysSinceWatered > -1){gridPropertyDetails.daysSinceWatered = -1;}// Set gridpropertydetailsSetGridPropertyDetails(gridPropertyDetails.gridX, gridPropertyDetails.gridY, gridPropertyDetails, sceneSave.gridPropertyDetailsDictionary);#endregion Update all grid properties to reflect the advance in the day}}}}// Display grid property details to reflect changed valuesDisplayGridPropertyDetails();
}

（5）优化Player.cs脚本

优化ProcessPlayerClickInput函数，代码如下：

修改ProcessPlayerClickInputSeed函数如下：

private void ProcessPlayerClickInputSeed(GridPropertyDetails gridPropertyDetails, ItemDetails itemDetails)
{if(itemDetails.canBeDropped && gridCursor.CursorPositionIsValid && gridPropertyDetails.daysSinceDug > -1 && gridPropertyDetails.seedItemCode == -1){PlantSeedAtCursor(gridPropertyDetails, itemDetails);}else if (itemDetails.canBeDropped && gridCursor.CursorPositionIsValid){EventHandler.CallDropSelectedItemEvent();}
}

添加PlantSeedAtCursor函数如下：

 private void PlantSeedAtCursor(GridPropertyDetails gridPropertyDetails, ItemDetails itemDetails){// update grid properties with seed detailsgridPropertyDetails.seedItemCode = itemDetails.itemCode;gridPropertyDetails.growthDays = 0;// Display planted crop at grid property detailsGridPropertiesManager.Instance.DisplayPlantedCrop(gridPropertyDetails);// Remove item from inventoryEventHandler.CallRemoveSelectedItemFromInventoryEvent();}

（6）优化UIInventorySlot.cs脚本

修改OnEnable代码，

 private void OnEnable(){EventHandler.AfterSceneLoadEvent += SceneLoaded;EventHandler.RemoveSelectedItemFromInventoryEvent += RemoveSelectedItemFromInventory;EventHandler.DropSelectedItemEvent += DropSelectedItemAtMousePosition;}

修改OnDisable代码：

private void OnDisable()
{EventHandler.AfterSceneLoadEvent -= SceneLoaded;EventHandler.RemoveSelectedItemFromInventoryEvent -= RemoveSelectedItemFromInventory;EventHandler.DropSelectedItemEvent -= DropSelectedItemAtMousePosition;
}

添加RemoveSelectedItemFromInventory函数代码：

 private void RemoveSelectedItemFromInventory(){if(itemDetails != null && isSelected){int itemCode = itemDetails.itemCode;// Remove item from players inventoryInventoryManager.Instance.RemoveItem(InventoryLocation.player, itemCode);// If no more of iitem then clear selectedif(InventoryManager.Instance.FindItemInInventory(InventoryLocation.player, itemCode) == -1){ClearSelectedItem();}}}

（7）补充配置信息

配置GridPropertiesManager的So_Crop Detail List信息如下：

7、运行游戏

先用Hoe挖一块地

然后洒下Parsnip的种子

按下G键可以加速时间，此时就可以看到防风草生长的过程。