garsonlab/UnityShaderRepository

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Unity Shader Repository

Use Unity Version > 5 当前使用Unity版本大于5

Table of Contents

[TOCM]

1. Forge 雾效

1.1

2. Mask 裁剪

2.1 Rotate Mask 旋转裁剪

 fixed4 frag (v2f i) : COLOR
 {
 float2 center = float2(_CenterX, _CenterY);//自定义旋转中心点
 float2 uv = i.uv.xy - center;//当前点对应中心点的相对坐标
 // 旋转矩阵的公式: (cos - sin, sin + cos)顺时针
 float cosVal = cos(_RotateSpeed*_Time.y);
 float sinVal = sin(_RotateSpeed*_Time.y);
 uv = mul(uv, float2x2(cosVal, -sinVal, sinVal, cosVal)) + center;
 fixed4 color = tex2D(_MainTex, i.uv.xy)*_Color;
 color.a = color.a * tex2D(_MaskTex, uv).a;//用MaskTex的a做裁剪
 return color;
 }

2.2 Rect Soft Mask 矩形软裁剪

 if (_UseClipRect) 
 {
 //根据世界坐标计算,源自NGUI
 float2 factor = float2(0.0,0.0);
 float2 tempXY = (i.worldPos.xy - _ClipRect.xy)/float2(_SoftClipLeft, _SoftClipBottom)*step(_ClipRect.xy, i.worldPos.xy);
 factor = max(factor,tempXY);
 float2 tempZW = (_ClipRect.zw-i.worldPos.xy)/float2(_SoftClipRight, _SoftClipTop)*step(i.worldPos.xy,_ClipRect.zw);
 factor = min(factor,tempZW);
 color.a *= clamp(min(factor.x,factor.y),0.0,1.0);
 }