Shader 如何表现攻击范围

使用Projector组件
方形

Shader "LSQ/EffectAchievement/AttackRectRange"
{Properties {_ShadowTex ("Cookie", 2D) = "" {}_MainColor ("ScanColor", Color) = (1,1,1,1)_Border ("Border", Range(0, 0.5)) = 0.2_ScanSpeed ("ScanSpeed", float) = 0.5_ScanSize ("ScanSize", Range(0, 0.5)) = 0.2_ScanInterval ("ScanInterval", float) = 3}Subshader {Tags { "RenderType"="Transparent" "Queue"="Transparent"}Pass {ZWrite OffBlend SrcAlpha OneMinusSrcAlphaOffset -1, -1CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct a2v {float4 vertex : POSITION;};struct v2f {float4 pos : SV_POSITION;float4 uvShadow : TEXCOORD1;};float4x4 unity_Projector;fixed4 _MainColor;sampler2D _ShadowTex;float _Border;float _ScanSize;float _ScanSpeed;float _ScanInterval;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uvShadow = mul(unity_Projector, v.vertex);return o;}float Rectangle(float2 samplePos, float2 halfSize){float2 edgeDistance = abs(samplePos) - halfSize;float2 outsideDistance = length(max(0, edgeDistance));float2 insideDistance = min(0, max(edgeDistance.x, edgeDistance.y));float2 softRect = outsideDistance + insideDistance;float change = fwidth(softRect) * 0.5;float hardRect = smoothstep(-change, change, softRect);return hardRect;}fixed4 frag (v2f i) : SV_Target{//投影fixed fullMask = tex2Dproj (_ShadowTex, UNITY_PROJ_COORD(i.uvShadow)).a;//去除边缘拉伸const float BORDER = 0.001;if (i.uvShadow.x / i.uvShadow.w < BORDER|| i.uvShadow.x / i.uvShadow.w > 1 - BORDER  || i.uvShadow.y / i.uvShadow.w < BORDER|| i.uvShadow.y / i.uvShadow.w > 1 - BORDER){fullMask = 0;}float2 uv = i.uvShadow - 0.5f;float len = length(uv);//正方形float borderRect = saturate(Rectangle(uv, 0.5 - _Border));//正方形波float dis = (abs(uv.x) + abs(uv.y)) + _Time.y * _ScanSpeed;dis *= _ScanInterval;dis = dis - floor(dis);float rectWave1 = Rectangle(uv, dis);float rectWave2 = Rectangle(uv, dis + _ScanSize);float rectWave = saturate(rectWave1 - rectWave2);float alpha = (borderRect + rectWave) * fullMask;return fixed4(_MainColor.rgb, alpha);}ENDCG}}
}

圆形

Shader "LSQ/EffectAchievement/AttackCircleRange"
{Properties {_ShadowTex ("Cookie", 2D) = "" {}_MainColor ("ScanColor", Color) = (1,1,1,1)_Forward ("Forward", Range(0, 360)) = 0_MinRange ("MinRange", Range(0, 0.25)) = 0_AttackAngle ("AttackAngle", Range(0, 360)) = 60_Power ("Power", float) = 5_Strength ("Strength", float) = 1_ScanSpeed ("ScanSpeed", float) = 0.5_ScanInterval ("ScanInterval", float) = 3_ScanStrength ("ScanStrength", float) = 1}Subshader {Tags { "RenderType"="Transparent" "Queue"="Transparent"}Pass {ZWrite OffBlend SrcAlpha OneMinusSrcAlphaOffset -1, -1CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct a2v {float4 vertex : POSITION;};struct v2f {float4 pos : SV_POSITION;float4 uvShadow : TEXCOORD1;};float4x4 unity_Projector;fixed4 _MainColor;sampler2D _ShadowTex;float _Forward;float _MinRange;float _AttackAngle;float _Power;float _Strength;float _ScanSpeed;float _ScanInterval;float _ScanStrength;v2f vert (a2v v){v2f o;o.pos = UnityObjectToClipPos(v.vertex);o.uvShadow = mul(unity_Projector, v.vertex);return o;}float2 Rotate(float2 samplePosition, float rotation){const float PI = 3.14159;float angle = rotation / 180 * PI;float sine, cosine;sincos(angle, sine, cosine);return float2(cosine * samplePosition.x + sine * samplePosition.y, cosine * samplePosition.y - sine * samplePosition.x);}fixed4 frag (v2f i) : SV_Target{float2 uv = i.uvShadow - 0.5f;uv = Rotate(uv, _Forward);float len = length(uv);float len2 = uv.x * uv.x + uv.y * uv.y;float range;//最小范围          if (len2 < _MinRange){range = 0;}else{//角度const float PI = 3.14159;float angle = atan2(uv.y, uv.x) / PI * 180;range = 1 - step(smoothstep(_AttackAngle * 0.5, 0, angle) - smoothstep(0, -_AttackAngle * 0.5, angle), 0);}//投影fixed fullMask = tex2Dproj (_ShadowTex, UNITY_PROJ_COORD(i.uvShadow)).a;//去除边缘拉伸const float BORDER = 0.001;if (i.uvShadow.x / i.uvShadow.w < BORDER|| i.uvShadow.x / i.uvShadow.w > 1 - BORDER  || i.uvShadow.y / i.uvShadow.w < BORDER|| i.uvShadow.y / i.uvShadow.w > 1 - BORDER){fullMask = 0;}//最外圈float alpha = pow(len, _Power) * fullMask * _Strength;//中心波float centerWave = 0;if(alpha > 0){float dis = len + _Time.y * _ScanSpeed;dis *= _ScanInterval;float wave = dis - floor(dis);wave = pow(wave, _Power) * _ScanStrength;alpha = clamp(alpha + wave, 0, _Strength);}return fixed4(_MainColor.rgb, alpha * range);}ENDCG}}
}

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