Shader纹理动画¶
参考 《unity shader 入门精要》¶
0X01 序列帧动画¶
爆炸的动画¶
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Book/11.ImageSequenceAnimation"
{
//折射
Properties
{
_Color ("Color Tint",Color)=(1,1,1,1)
_MainTex("Main Tex",2D)="white"{}
_HorizontalAmount("Horizontal Amount",Float)=4.0
_VerticalAmount("Vertical Amount",Float)=4.0
_Speed("Speed",Range(1,100))=30.0
}
SubShader
{
Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
Pass
{
Tags { "LightMode"="ForwardBase" }
ZWrite Off
Blend srcAlpha OneMinusSrcAlpha
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
float4 _Color;
sampler2D _MainTex;
float _HorizontalAmount,_VerticalAmount,_Speed;
float4 _MainTex_ST;
struct a2v
{
float4 vertex : POSITION;
float3 normal: NORMAL;
float4 tangent:TANGENT;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float3 lightDir:TEXCOORD1;
float3 viewDir:TEXCOORD2;
float3 worldNormal:TEXCOORD3;
float3 worldPos:TEXCOORD4;
float3 worldRefr:TEXCOORD5;
};
v2f vert (a2v v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.texcoord,_MainTex);
float time = floor(_Time.y*_Speed);
float y = floor(time/_HorizontalAmount);
float x = time - y*_HorizontalAmount;
o.uv= o.uv +float2(x,-y);
o.uv.x /= _HorizontalAmount;
o.uv.y /= _VerticalAmount;
return o;
}
fixed4 frag (v2f i) : SV_Target
{
float4 col = tex2D(_MainTex,i.uv);
col.rgb*=_Color.rgb;
return col;
}
fixed4 frag1 (v2f i) : SV_Target
{
float time = floor(_Time.y*_Speed);
/*
float offset = time%(_HorizontalAmount*_VerticalAmount);
float offsetY=floor(offset/_HorizontalAmount);
float offsetX = offset - offsetY*_HorizontalAmount;
float2 uv = float2(i.uv.x/_HorizontalAmount,i.uv.y/_VerticalAmount) +float2(offsetX*1/_HorizontalAmount,-offsetY*1/_VerticalAmount);
*/
//想象成动画一直竖着往下滚动，向下无限远且循环，time是当前要播放第几帧的编号，这个编号一直无限增加
float y = floor(time/_HorizontalAmount);
float x = time - y*_HorizontalAmount;
float2 uv = i.uv +float2(x,-y);
uv.x /= _HorizontalAmount;
uv.y /= _VerticalAmount;
float4 col = tex2D(_MainTex,uv);
col.rgb*=_Color.rgb;
return col;
}
ENDCG
}
}
FallBack "Diffuse"
}
滚动背景¶
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Book/11.ScrollingBackground"
{
//折射
Properties
{
_MainTex("Base Layer",2D)="white"{}
_DetailTex("2nd Layer",2D)="white"{}
_ScrollX("Base Layer Scroll Speed",Float)=4.0
_Scroll2X("2nd Layer Scroll Speed",Float)=4.0
_Multiplier("Layer Multiplier",Float)=1.0
}
SubShader
{
Tags { "RenderType"="Opaque" "Queue"="Geometry"}
Pass
{
Tags { "LightMode"="ForwardBase" }
ZWrite Off
Blend srcAlpha OneMinusSrcAlpha
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
sampler2D _MainTex,_DetailTex;
float _ScrollX,_Scroll2X,_Multiplier;
float4 _MainTex_ST,_DetailTex_ST;
struct a2v
{
float4 vertex : POSITION;
float3 normal: NORMAL;
float4 tangent:TANGENT;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float4 uv : TEXCOORD0;
float3 lightDir:TEXCOORD1;
float3 viewDir:TEXCOORD2;
float3 worldNormal:TEXCOORD3;
float3 worldPos:TEXCOORD4;
float3 worldRefr:TEXCOORD5;
};
v2f vert (a2v v)
{
v2f o;
o.pos = UnityObjectToClipPos(v.vertex);
o.uv.xy = TRANSFORM_TEX(v.texcoord,_MainTex)+frac(float2(_ScrollX*_Time.y,0));
o.uv.zw = TRANSFORM_TEX(v.texcoord,_DetailTex)+frac(float2(_Scroll2X*_Time.y,0));
return o;
}
fixed4 frag (v2f i) : SV_Target
{
float4 baseColor = tex2D(_MainTex,i.uv.xy);
float4 secondColor = tex2D(_DetailTex,i.uv.zw);
fixed4 c = lerp(baseColor,secondColor,secondColor.a);
c.rgb *= _Multiplier;
return c;
}
ENDCG
}
}
FallBack "Diffuse"
}
0X02 顶点动画¶
流动的河流¶
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Book/11.Water"
{
//折射
Properties
{
_MainTex("Main Tex",2D)="white"{}
_Color("Color Tint",Color)=(1,1,1,1)
_Magnitude("Distortion Magnitude",float)=1
_Frequency("Distortion Frequency",float)=1
_InvWaveLength("Distortion Inverse Wave Length",float)=10
_Speed("Speed",float)=0.5
}
SubShader
{
Tags { "RenderType"="Transparent" "Queue"="Transparent" "IgnoreProjector"="True" "DisableBatching"="True"}
Pass
{
Tags { "LightMode"="ForwardBase" }
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
Cull Off
//Cull Front
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
float4 _Color;
sampler2D _MainTex;
float _Magnitude,_Frequency,_InvWaveLength,_Speed;
float4 _MainTex_ST;
struct a2v
{
float4 vertex : POSITION;
float3 normal: NORMAL;
float4 tangent:TANGENT;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float4 uv : TEXCOORD0;
float3 lightDir:TEXCOORD1;
float3 viewDir:TEXCOORD2;
float3 worldNormal:TEXCOORD3;
float3 worldPos:TEXCOORD4;
float3 worldRefr:TEXCOORD5;
};
v2f vert (a2v v)
{
v2f o;
float4 offset=float4(0,0,0,0);
//offset.x = sin(_Time.y*_Frequency+(v.vertex.x+v.vertex.y+v.vertex.z)*_InvWaveLength)*_Magnitude;
offset.x = sin(_Time.y*_Frequency+(v.vertex.z)*_InvWaveLength)*_Magnitude;
//offset.x = sin((v.vertex.z)*_InvWaveLength)*_Magnitude;
o.pos = UnityObjectToClipPos(v.vertex+offset);
o.uv.xy = TRANSFORM_TEX(v.texcoord,_MainTex)+frac(float2(0,_Speed*_Time.y));
return o;
}
fixed4 frag (v2f i) : SV_Target
{
fixed4 c = tex2D(_MainTex,i.uv.xy);;
return c;
}
ENDCG
}
}
FallBack "Diffuse"
}
广告牌（始终面向摄像机）¶
// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
Shader "Book/11.Billboard"
{
//折射
Properties
{
_MainTex("Main Tex",2D)="white"{}
_Color("Color Tint",Color)=(1,1,1,1)
_VerticalBillboarding("Vertical Restraints",Range(0,1))=1
}
SubShader
{
Tags { "RenderType"="Transparent" "Queue"="Transparent" "IgnoreProjector"="True" "DisableBatching"="True"}
//Tags { "RenderType"="Transparent" "Queue"="Transparent" "IgnoreProjector"="True"}
Pass
{
Tags { "LightMode"="ForwardBase" }
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
//Cull Front
Cull Off
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
// make fog work
//#pragma multi_compile_fog
#include "UnityCG.cginc"
float4 _Color;
sampler2D _MainTex;
float _VerticalBillboarding;
float4 _MainTex_ST;
struct a2v
{
float4 vertex : POSITION;
float3 normal: NORMAL;
float4 tangent:TANGENT;
float2 texcoord : TEXCOORD0;
};
struct v2f
{
float4 pos : SV_POSITION;
float4 uv : TEXCOORD0;
float3 lightDir:TEXCOORD1;
float3 viewDir:TEXCOORD2;
float3 worldNormal:TEXCOORD3;
float3 worldPos:TEXCOORD4;
float3 worldRefr:TEXCOORD5;
};
v2f vert (a2v v)
{
v2f o;
float3 center = float3(0,0,0);
float3 viewer = mul(unity_WorldToObject,float4(_WorldSpaceCameraPos,1));
float3 normalDir =viewer-center;
normalDir.y=normalDir.y*_VerticalBillboarding;
normalDir = normalize(normalDir);
float3 upDir = abs(normalDir.y)>0.999?float3(0,0,1): float3(0,1,0);
float3 rightDir=normalize(cross(upDir,normalDir));
upDir = normalize(cross(normalDir,rightDir));
float3 centerOffs = v.vertex.xyz - center;
float3 localPos = center+ rightDir*centerOffs.x+upDir*centerOffs.y+normalDir*centerOffs.z;
//o.pos = mul(UNITY_MATRIX_MVP,float4(localPos,1));
o.pos = UnityObjectToClipPos(float4(localPos, 1));
o.uv.xy = TRANSFORM_TEX(v.texcoord,_MainTex);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
fixed4 c = tex2D(_MainTex,i.uv.xy);;
c.rgb*=_Color.rgb;
return c;
}
ENDCG
}
}
FallBack "Transparent/VertexLit"
}