ShaderLab cginc

固定 Vector.forward 方向的球形透视

参考： Shader in Unity & Curved world shader & Change material color 实现的效果

实现的只能是 Vector.forward 方向的球形投影

#ifndef __CURVE_WORLD_LIB_H__
#define __CURVE_WORLD_LIB_H__

// jave.lin 2023/02/01 curve world library

    #ifdef _CURVE_WORLD_ON

        uniform float _Curve_Depth;
        uniform float _Depth_Divider;

        void CurveWorldApply(inout float3 positionWS, out float3 positionOS)
        {
            float3 deltaVec = positionWS - _WorldSpaceCameraPos.xyz;
            float  E = -_Curve_Depth * _Depth_Divider;
            float  detlaVecZ2 = deltaVec.z * deltaVec.z;
            detlaVecZ2 *= E;
            float3 offset = float3(0.0, detlaVecZ2, 0.0);
            positionWS += offset;
            positionOS = mul(unity_WorldToObject, float4(positionWS, 1.0)).xyz;
        }

        #define CURVE_WORLD_APPLY(positionWS, positionOS) CurveWorldApply(positionWS, positionOS);

    #else

        #define CURVE_WORLD_APPLY(positionWS, positionOS)

    #endif

#endif

根据镜头任意视角方向的球形透视

#ifndef __CURVE_WORLD_LIB_H__
#define __CURVE_WORLD_LIB_H__

// jave.lin 2023/02/01 curve world library

    #ifdef _CURVE_WORLD_ON

        uniform float _Curve_Depth;
        uniform float _Depth_Divider;
        //uniform int _CW_Enabled;

        void CurveWorldApply(inout float3 positionWS, out float3 positionOS)
        {
            //float3 srcPosWS = positionWS;
            //float3 srcPosOS = positionOS;

            // jave.lin : zDist ref to : AutoLight.cginc

            float3 deltaVec = _WorldSpaceCameraPos - positionWS;
            float zDist = dot(deltaVec, UNITY_MATRIX_V[2].xyz);
            float  E = -_Curve_Depth * _Depth_Divider;
            float  zDist2 = zDist * zDist;
            zDist2 *= E;
            float3 offset = float3(0.0, zDist2, 0.0);
            positionWS += offset;
            positionOS = mul(unity_WorldToObject, float4(positionWS, 1.0)).xyz;

            //positionWS = lerp(srcPosWS, positionWS, _CW_Enabled);
            //positionOS = lerp(srcPosOS, positionOS, _CW_Enabled);
        }

        #define CURVE_WORLD_APPLY(positionWS, positionOS) CurveWorldApply(positionWS, positionOS);

    #else

        #define CURVE_WORLD_APPLY(positionWS, positionOS)

    #endif

#endif

CurveWorldControl.cs

// jave.lin : curve world control

using UnityEngine;

[ExecuteInEditMode]
public class CurveWorldControl : MonoBehaviour
{
    private bool _last_on = false;
    public bool on = true;
    [Range(0.005f, 1.0f)]
    public float curveDepth = 0.015f;
    public float depthDivider = 0.0f;

    private static int _Curve_Depth = Shader.PropertyToID("_Curve_Depth");
    private static int _Depth_Divider = Shader.PropertyToID("_Depth_Divider");
    private void Update()
    {
        if (_last_on != on)
        {
            if (on)
            {
                _Curve_Depth = Shader.PropertyToID("_Curve_Depth");
                _Depth_Divider = Shader.PropertyToID("_Depth_Divider");
                Shader.EnableKeyword("_CURVE_WORLD_ON");
            }
            else
            {
                Shader.DisableKeyword("_CURVE_WORLD_ON");
            }
            _last_on = on;
        }

        if (_last_on)
        {
            Shader.SetGlobalFloat(_Curve_Depth, curveDepth);
            Shader.SetGlobalFloat(_Depth_Divider, depthDivider);
        }
    }
}

需要修改的代码

修改所有 3D shader 即可

pass添加代码：

#pragma multi_compile _ _CURVE_WORLD_ON
#include “CurveWorldLib.cginc”
CURVE_WORLD_APPLY(posWorld.xyz, v.vertex.xyz)

要添加的pass

ForwardBase
ForwardAdd
ShadowCaster

CurveWorldControl.cs 的 DontDestryOnLoad
对应场景才开启 CurveWorldControl

Project

TestingSphereProjectionEffect - 参考： Shader in Unity & Curved world shader & Change material color 实现的效果

References

全部看完，相信你可以做一款很有意思的游戏，或是游戏中很有特色的效果

英文搜索关键字：
- 油管搜索关键字: curved-world
- google : curved-world
Shader in Unity & Curved world shader & Change material color
Mobile Optimized Curve Shader for Mobile Games || Universal Render Pipeline || Shader Graph
Curved World shader bending
curved world using vertex shaders, #threejs, #glsl
Making of SHRINKING PLANET - Ludum Dare 38
Make Awesome Curved Worlds! - Code Monkey 大佬的
Animal Crossing World Bending Effect | Shader Graph | Unity Tutorial
Curved World
Unity Endless Game - Part 16: Post Processing & Curved Shader