60 lines
2.1 KiB
Plaintext
60 lines
2.1 KiB
Plaintext
|
Shader "Ares/WaterWave/WaterWaveEffect"
|
|||
|
|
{
|
|||
|
|
Properties
|
|||
|
|
{
|
|||
|
|
_MainTex ("Base (RGB)", 2D) = "white" {}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
CGINCLUDE
|
|||
|
|
#include "UnityCG.cginc"
|
|||
|
|
#include "../../Gonbest/Include/Base/MathCG.cginc"
|
|||
|
|
uniform sampler2D _MainTex;
|
|||
|
|
uniform float _distanceFactor;
|
|||
|
|
uniform float _timeFactor;
|
|||
|
|
uniform float _totalFactor;
|
|||
|
|
uniform float _waveWidth;
|
|||
|
|
uniform float _curWaveDis;
|
|||
|
|
|
|||
|
|
fixed4 frag(v2f_img i) : SV_Target
|
|||
|
|
{
|
|||
|
|
//计算uv到中间点的向量(向外扩，反过来就是向里缩)
|
|||
|
|
float2 dv = float2(0.5, 0.5) - i.uv;
|
|||
|
|
//按照屏幕长宽比进行缩放
|
|||
|
|
dv = dv * float2(_ScreenParams.x / _ScreenParams.y, 1);
|
|||
|
|
//计算像素点距中点的距离
|
|||
|
|
float dis = sqrt(dv.x * dv.x + dv.y * dv.y);
|
|||
|
|
//用sin函数计算出波形的偏移值factor
|
|||
|
|
//dis在这里都是小于1的，所以我们需要乘以一个比较大的数，比如60，这样就有多个波峰波谷
|
|||
|
|
//sin函数是（-1，1）的值域，我们希望偏移值很小，所以这里我们缩小100倍，据说乘法比较快,so...
|
|||
|
|
float sinFactor = sin(dis * _distanceFactor + _Time.y * _timeFactor) * _totalFactor * 0.01;
|
|||
|
|
//距离当前波纹运动点的距离，如果小于waveWidth才予以保留，否则已经出了波纹范围，factor通过clamp设置为0
|
|||
|
|
float discardFactor = clamp(_waveWidth - abs(_curWaveDis - dis), 0, 1);
|
|||
|
|
//归一化
|
|||
|
|
float2 dv1 = GBNormalizeSafe(dv);
|
|||
|
|
//计算每个像素uv的偏移值
|
|||
|
|
float2 offset = dv1 * sinFactor * discardFactor;
|
|||
|
|
//像素采样时偏移offset
|
|||
|
|
float2 uv = offset + i.uv;
|
|||
|
|
return tex2D(_MainTex, uv);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
ENDCG
|
|||
|
|
|
|||
|
|
SubShader
|
|||
|
|
{
|
|||
|
|
Pass
|
|||
|
|
{
|
|||
|
|
ZTest Always
|
|||
|
|
Cull Off
|
|||
|
|
ZWrite Off
|
|||
|
|
Fog { Mode off }
|
|||
|
|
|
|||
|
|
CGPROGRAM
|
|||
|
|
#pragma vertex vert_img
|
|||
|
|
#pragma fragment frag
|
|||
|
|
#pragma fragmentoption ARB_precision_hint_fastest
|
|||
|
|
ENDCG
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
Fallback off
|
|||
|
|
}
|