3D_HW9

3D游戏编程 HW9

• 血条(Health Bar)设计

• IMGUI

• UGUI

• 两者比较

• 预制的使用方法

• 视频网址

血条(Health Bar)设计

IMGUI

这种实现比较容易, 直接在脚本里面添加相关的GUI即可.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class IMGUI : MonoBehaviour {
    public float health;
    private float change_health;
    private Rect blood_rec;
    private Rect blood_inc;
    private Rect blood_dec;

    private int blood_rec_x;
    private int blood_rec_y;
    private int blood_rec_len;
    private int blood_rec_height;
    private float blood_unit;

    void Start() {
        health = 0;
        change_health = 0;
        blood_unit = 0.2f;
        blood_rec_x = 700;
        blood_rec_y = 270;
        blood_rec_len = 300;
        blood_rec_height = 30;

        blood_rec = new Rect(blood_rec_x, blood_rec_y, blood_rec_len, blood_rec_height);
        blood_inc = new Rect(blood_rec_x, blood_rec_y - 33, 80, 20);
        blood_dec = new Rect(blood_rec_x + 100, blood_rec_y - 33, 80, 20);
    }

    void OnGUI() {
        if (GUI.Button(blood_inc, "increase")) {
            change_health = change_health + blood_unit > 1.0f ? 1.0f : change_health + blood_unit;
        }
        if (GUI.Button(blood_dec, "decrease")) {
            change_health = change_health - blood_unit < 0.0f ? 0.0f : change_health - blood_unit;
        }
        health = Mathf.Lerp(health, change_health, 0.05f);
        GUI.HorizontalScrollbar(blood_rec, 0.0f, health, 0.0f, 1.0f);
    }

    private void Update() {
        
    }
}

演示效果

gif动图	静态图片

UGUI

我们为上图的小恐龙添加一个血条.

• 添加UI -> Canvas
• Canvas，添加Slider
• 删除Handle Slider Area
• 删除Background
• 修改颜色
• 设置maxValue

演示效果

两者比较

IMGUI的文档如下: Unity originally had just two GUI Components. These have since been replaced by both the modern UI System, and the scripting-driven IMGUI System. The original GUI components are kept for legacy purposes but should not be used for new projects
IMGUI的特点是性能比较低, 主要用于游戏调试与自定义的Inspector面板.
而UGUI的运行效率会比IMGUI强, 性能比较好, 但是缺点是功能不是很完善, 目前主要用于游戏中的交互.

预制的使用方法

• 将预制拖入scene中.
• 导入相应的资源, 构建自己需要的场景.
• 然后将Canvas prefab拖到物体上, 变为子对象.
• 最后修改相应的属性.

视频网址

http://www.iqiyi.com/w_19say2kr65.html