UnityShader3波浪效果 UnityShader3实现波浪效果
宏哥1995 人气:0参考链接: 【OpenGL】Shader实例分析(一)-Wave
效果图:
1.首先,实现格子背景图
Shader "Custom/Curve" { Properties { _BackgroundColor ("BackgroundColor", Color) = (1, 1, 1, 1) _BackgroundColor2 ("BackgroundColor2", Color) = (0, 0, 0, 1) _Space ("Space", Range(0, 1)) = 0.2 _XOffset ("XOffset", Range(-1, 1)) = 0.15 _YOffset ("YOffset", Range(-1, 1)) = 0.05 } SubShader { Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; float2 uv : TEXCOORD0; }; //格子背景 fixed4 _BackgroundColor; fixed4 _BackgroundColor2; fixed _Space; fixed _XOffset; fixed _YOffset; v2f vert (appdata v) { v2f o; o.vertex = mul(UNITY_MATRIX_MVP, v.vertex); o.uv = v.uv; return o; } fixed4 frag (v2f i) : SV_Target { //fmod(x, y):x/y的余数,和x有同样的符号 //step(a, x):如果x<a,返回0;如果x>=a,返回1 //得到一个小于_Space的余数,即a的范围为[0, _Space) fixed a = fmod(i.uv.x + _XOffset, _Space); //有1/2概率返回0,有1/2概率返回1,从而形成间隔效果 a = step(0.5 * _Space, a); fixed b = fmod(i.uv.y + _YOffset, _Space); b = step(0.5 * _Space, b); return _BackgroundColor * a * b + _BackgroundColor2 * (1 - a * b); } ENDCG } } }
2.在中间添加一条直线
Shader "Custom/Curve" { Properties { _BackgroundColor ("BackgroundColor", Color) = (1, 1, 1, 1) _BackgroundColor2 ("BackgroundColor2", Color) = (0, 0, 0, 1) _Space ("Space", Range(0, 1)) = 0.2 _XOffset ("XOffset", Range(-1, 1)) = 0.15 _YOffset ("YOffset", Range(-1, 1)) = 0.05 } SubShader { Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; float2 uv : TEXCOORD0; }; //格子背景 fixed4 _BackgroundColor; fixed4 _BackgroundColor2; fixed _Space; fixed _XOffset; fixed _YOffset; v2f vert (appdata v) { v2f o; o.vertex = mul(UNITY_MATRIX_MVP, v.vertex); o.uv = v.uv; return o; } fixed4 frag (v2f i) : SV_Target { //fmod(x, y):x/y的余数,和x有同样的符号 //step(a, x):如果x<a,返回0;如果x>=a,返回1 //得到一个小于_Space的余数,即a的范围为[0, _Space) fixed a = fmod(i.uv.x + _XOffset, _Space); //有1/2概率返回0,有1/2概率返回1,从而形成间隔效果 a = step(0.5 * _Space, a); fixed b = fmod(i.uv.y + _YOffset, _Space); b = step(0.5 * _Space, b); fixed4 bgCol = _BackgroundColor * a * b + _BackgroundColor2 * (1 - a * b); //范围(1, 51),乘上100是扩大差距(中间最亮其他两边基本不亮),加上1是防止0作为除数,同时确保最中间最亮 float v = abs(i.uv.y - 0.5) * 100 + 1; v = 1 / v; fixed4 lineCol = fixed4(v, v, v, 1); return bgCol + lineCol; } ENDCG } } }
3.直线变曲线
Shader "Custom/Curve" { Properties { //调整背景 _BackgroundColor ("BackgroundColor", Color) = (1, 1, 1, 1) _BackgroundColor2 ("BackgroundColor2", Color) = (0, 0, 0, 1) _Space ("Space", Range(0, 1)) = 0.2 _XOffset ("XOffset", Range(-1, 1)) = 0.15 _YOffset ("YOffset", Range(-1, 1)) = 0.05 //调整曲线的波动 _Frequency ("Frequency", Range(0, 100)) = 10//频率 _Amplitude ("Amplitude", Range(0, 1)) = 0.1//振幅 _Speed ("Speed", Range(0, 100)) = 10//速度 } SubShader { Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; float2 uv : TEXCOORD0; }; //格子背景 fixed4 _BackgroundColor; fixed4 _BackgroundColor2; fixed _Space; fixed _XOffset; fixed _YOffset; half _Frequency; half _Amplitude; half _Speed; v2f vert (appdata v) { v2f o; o.vertex = mul(UNITY_MATRIX_MVP, v.vertex); o.uv = v.uv; return o; } fixed4 frag (v2f i) : SV_Target { //fmod(x, y):x/y的余数,和x有同样的符号 //step(a, x):如果x<a,返回0;如果x>=a,返回1 //得到一个小于_Space的余数,即a的范围为[0, _Space) fixed a = fmod(i.uv.x + _XOffset, _Space); //有1/2概率返回0,有1/2概率返回1,从而形成间隔效果 a = step(0.5 * _Space, a); fixed b = fmod(i.uv.y + _YOffset, _Space); b = step(0.5 * _Space, b); fixed4 bgCol = _BackgroundColor * a * b + _BackgroundColor2 * (1 - a * b); //范围(1, 51),乘上100是扩大差距(中间最亮其他两边基本不亮),加上1是防止0作为除数,同时确保最中间最亮 //float y = i.uv.y + sin(_Time.y);扫描线效果 float y = i.uv.y + sin(i.uv.x * _Frequency + _Time.y * _Speed) * _Amplitude;//可以看成一条y的关于x的方程式 float v = abs(y - 0.5) * 100 + 1; v = 1 / v; fixed4 lineCol = fixed4(v, v, v, 1); return bgCol + lineCol; } ENDCG } } }
注释掉的是扫描线效果:
4.多曲线。其实就是for循环,然后在频率和振幅上加些变量,即可形成多条不同的曲线。
Shader "Custom/Curve" { Properties { //调整背景 _BackgroundColor ("BackgroundColor", Color) = (1, 1, 1, 1) _BackgroundColor2 ("BackgroundColor2", Color) = (0, 0, 0, 1) _Space ("Space", Range(0, 1)) = 0.2 _XOffset ("XOffset", Range(-1, 1)) = 0.15 _YOffset ("YOffset", Range(-1, 1)) = 0.05 //调整曲线的波动 _Frequency ("Frequency", Range(0, 100)) = 10//频率 _Amplitude ("Amplitude", Range(0, 1)) = 0.1//振幅 _Speed ("Speed", Range(0, 100)) = 10//速度 } SubShader { Pass { CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" struct appdata { float4 vertex : POSITION; float2 uv : TEXCOORD0; }; struct v2f { float4 vertex : SV_POSITION; float2 uv : TEXCOORD0; }; //格子背景 fixed4 _BackgroundColor; fixed4 _BackgroundColor2; fixed _Space; fixed _XOffset; fixed _YOffset; half _Frequency; half _Amplitude; half _Speed; v2f vert (appdata v) { v2f o; o.vertex = mul(UNITY_MATRIX_MVP, v.vertex); o.uv = v.uv; return o; } fixed4 frag (v2f i) : SV_Target { //fmod(x, y):x/y的余数,和x有同样的符号 //step(a, x):如果x<a,返回0;如果x>=a,返回1 //得到一个小于_Space的余数,即a的范围为[0, _Space) fixed a = fmod(i.uv.x + _XOffset, _Space); //有1/2概率返回0,有1/2概率返回1,从而形成间隔效果 a = step(0.5 * _Space, a); fixed b = fmod(i.uv.y + _YOffset, _Space); b = step(0.5 * _Space, b); fixed4 bgCol = _BackgroundColor * a * b + _BackgroundColor2 * (1 - a * b); //范围(1, 51),乘上100是扩大差距(中间最亮其他两边基本不亮),加上1是防止0作为除数,同时确保最中间最亮 //float y = i.uv.y + sin(_Time.y);扫描线效果 fixed4 lineCol; for(int count = 0;count < 3;count++) { float y = i.uv.y + sin(i.uv.x * _Frequency * count * 0.1 + _Time.y * _Speed) * (_Amplitude + count * 0.1);//可以看成一条y的关于x的方程式 y = saturate(y);//重新映射到(0, 1)范围 float v = abs(y - 0.5) * 100 + 1; v = 1 / v; lineCol += fixed4(v, v, v, 1);//注意是"+"操作,对颜色进行叠加 } return bgCol + lineCol; } ENDCG } } }
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