How to implement a grid construction system

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What our build system is trying to achieve：

• WASD在地图上移动
• 按1~6key to switch the construction unit type
• Building units can occupy multiple grids
• Left click to execute build（Has a build effect）
• Rkey and change the construction direction
• Right click to destroy built in units
• Can't overlap builds

Defines the underlying grid data structure

Define building prefabs,点击创建实例

点击创建实例

Resolve creation location overlap

Can only be created inside a grid（cannot be crossed）

• Get the grid position based on the mouse position
• This ensures that it is drawn within the grid
• 思考：How to get grid position from mouse position？

Make sure not to overlap builds

Configure the data for each building unit

Resolved cross grid building unit overlap

解决方法：

• Get all grid coordinates occupied by building units（如何实现？）
• Find grid objects based on grid coordinates
• Set these meshes to be occupied by the building being created
• 思考：如何实现GetPositionList？

Made building unit creation direction rotatable(难点)

Define the axis of rotation（在Step2）

• Defines the current orientation
• Define rotation rules
• How to keep the rotation within the same grid area？
• 思考如何实现：
  • GetNextDir
  • GetRotationOffset
  • GetRotationAngle

Press the button to switch the type of building unit

• Build a list of building unit types
• By default, create a new section0types of buildings

Create building placement preview effects

• GridObjectstore insteadPlaceObject
• 存储PlaceObject到GridObject

Right-click to clear the preview object

Use the placement effect

Business advancement

• How to achieve building unit upgrades？
• 升级系统（数据配置、UI界面、升级逻辑、服务器交互…）
• How to realize the construction unitAI？
• Abstraction of architectural units：
• 怪物：自动战斗
• 角色：自主行为（休息、工作、娱乐、生活）、with in-scenario prop units（such as driving facilities）的交互
• 设施：Auto-travel taxis、Playground facilities, etc
• 资源：extractable material、Pickup items、障碍…
• What if there are hundreds of buildings？
• What if different player types could build different types of buildings？
• How to add building game unitsUI操作界面？
• How to play online？

更多学习资源请加QQ：1517069595获取（/企业级性能优化/热更新/Shader特效/服务器/商业项目实战/每周直播/一对一指导）
完整视频可以点击B站链接：https://www.bilibili.com/video/BV1TK4y1g7Se