使用unity3D实现全景图像查看器

最新推荐文章于 2025-09-01 18:12:19 发布

转载最新推荐文章于 2025-09-01 18:12:19 发布 · 4.6k 阅读

本文介绍了一种用于全景图展示的特殊Shader实现方式，通过Unlit/Pano360Shader达到内部纹理映射的效果，并实现了基于Unity的鼠标拖拽全景视图功能。此外，还提供了一个用于图像遮罩的MaskIcon Shader示例。

转载自   http://www.taidous.com/thread-52133-1-1.html

Shader "Unlit / Pano360Shader"
{
        Properties
{
        _MainTex("Base(RGB)", 2D) = "white"{}
        _Color("Main Color", Color) = (1,1,1,0.5)
}
SubShader
{
        Tags{ "RenderType" = "Opaque" }
        //This is used to print the texture inside of the sphere
        Cull Front
        CGPROGRAM
#pragma surface surf SimpleLambert
        half4 LightingSimpleLambert(SurfaceOutput s, half3 lightDir, half atten)
{
        half4 c;
        c.rgb = s.Albedo;
        return c;
}

sampler2D _MainTex;
struct Input
{
        float2 uv_MainTex;
        float4 myColor : COLOR;
};

fixed3 _Color;
void surf(Input IN, inout SurfaceOutput o)
{
        //This is used to mirror the image correctly when printing it inside of the sphere
        IN.uv_MainTex.x = 1 - IN.uv_MainTex.x;
        fixed3 result = tex2D(_MainTex, IN.uv_MainTex)*_Color;
        o.Albedo = result.rgb;
        o.Alpha = 1;
}
ENDCG
}
Fallback "Diffuse"
}

遮罩Shader

[AppleScript] 纯文本查看复制代码

Shader "ImageEffect/MaskIcon"
{
        Properties
        {
                [PerRendererData] _MainTex("Sprite Texture", 2D) = "white" {}
        _Mask("Base (RGB)", 2D) = "white" {}


        _Color("Tint", Color) = (1,1,1,1)
                _StencilComp("Stencil Comparison", Float) = 8
                _Stencil("Stencil ID", Float) = 0
                _StencilOp("Stencil Operation", Float) = 0
                _StencilWriteMask("Stencil Write Mask", Float) = 255
                _StencilReadMask("Stencil Read Mask", Float) = 255
                _ColorMask("Color Mask", Float) = 15
                [Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip("Use Alpha Clip", Float) = 0
        }

                SubShader
        {
                Tags
        {
                "Queue" = "Transparent"
                "IgnoreProjector" = "True"
                "RenderType" = "Transparent"
                "PreviewType" = "Plane"
                "CanUseSpriteAtlas" = "True"
        }

                Stencil
        {
                Ref[_Stencil]
                Comp[_StencilComp]
                Pass[_StencilOp]
                ReadMask[_StencilReadMask]
                WriteMask[_StencilWriteMask]
        }

                Cull Off
                Lighting Off
                ZWrite Off
                ZTest[unity_GUIZTestMode]
                Blend SrcAlpha OneMinusSrcAlpha
                ColorMask[_ColorMask]

                Pass
        {
                CGPROGRAM
#pragma vertex vert
#pragma fragment frag

#include "UnityCG.cginc"
#include "UnityUI.cginc"

#pragma multi_compile __ UNITY_UI_ALPHACLIP

                struct a2v
        {
                fixed2 uv : TEXCOORD0;
                half4 vertex : POSITION;
                float4 color    : COLOR;
        };

        fixed4 _Color;

        struct v2f
        {
                fixed2 uv : TEXCOORD0;
                half4 vertex : SV_POSITION;
                float4 color    : COLOR;
        };

        sampler2D _MainTex;
        sampler2D _Mask;

        v2f vert(a2v i)
        {
                v2f o;
                o.vertex = mul(UNITY_MATRIX_MVP, i.vertex);
                o.uv = i.uv;

                o.color = i.color * _Color;
                return o;
        }

        fixed4 frag(v2f i) : COLOR
        {
                half4 color = tex2D(_MainTex, i.uv) * i.color;
                half4 mask = tex2D(_Mask, i.uv);
                color.a *= mask.a;
                return color;
        }
                ENDCG
        }
        }
}

C#代码

[AppleScript] 纯文本查看复制代码

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

public class Pano360 : MonoBehaviour {
    
    public  Transform container;
    float turnSpeedMouse=50;

    /// <summary>  
    /// 第一次按下的位置  
    /// </summary>  
    private Vector2 first = Vector2.zero;
    /// <summary>  
    /// 鼠标的拖拽位置（第二次的位置）  
    /// </summary>  
    private Vector2 second = Vector2.zero;
    /// <summary>  
    /// 旋转的角度  
    /// </summary>  
    private float angle = 3f;

    void OnGUI()
    {
        if (Event.current.type == EventType.MouseDown)
        {
            //记录鼠标按下的位置 　　  
            first = Event.current.mousePosition;
        }
        if (Event.current.type == EventType.MouseDrag)
        {
            //记录鼠标拖动的位置 　　  
            second = Event.current.mousePosition;

            if (second.x < first.x)
            {
                //拖动的位置的x坐标比按下的位置的x坐标小时,响应向左事件 　　  
                this.transform.Rotate(Vector3.up , angle);

                container.Rotate(new Vector3(0 , angle * (-1) , 0f) * Time.deltaTime * turnSpeedMouse);
                transform.Rotate(new Vector3(angle , 0 , 0) * Time.deltaTime * turnSpeedMouse);
            }
            if (second.x > first.x)
            {
                //拖动的位置的x坐标比按下的位置的x坐标大时,响应向右事件 　　  
                this.transform.Rotate(Vector3.down , angle);
                container.Rotate(new Vector3(0 , angle * (1) , 0f) * Time.deltaTime * turnSpeedMouse);
                transform.Rotate(new Vector3(angle , 0 , 0) * Time.deltaTime * turnSpeedMouse);
            }
            first = second;
        }
    }
}