Purpose of Practice
概要。项目瀑布波纹效果的要求。内容。
参考游戏 : RIM2
Shader 的实现。使用不同的两张波纹（Ripple）纹理，各自设置不同的速度使波纹效果更自然。
为了让Mesh的波纹呈现向外围渐渐消失的效果，使用Vertex Color。
为了在Shader使波纹的边缘自然地Fade-out,Vertex color 要用 mask。
- 先用黑色填满整体后，在开着Soft-Selection的状态下选择里面的Vertex填满红色。
- 用Vertex tool的Blur功能把整体修改得自然。
- Mesh的内部也需要添加自然波纹效果的话，内部也设置成黑色便可。
Shader Snippet
该着色器是使用“ Amplify Shader Editor”创建的。
This shader was created using the Amplify Shader Editor.
Shader "Water Ripple Shader"
{
Properties
{
_Cutoff( "Mask Clip Value", Float ) = 0.5
_RippleFoam("RippleFoam", 2D) = "white" {}
_MainFoamSpeed("Main Foam Speed", Float) = 0.1
_SecondFoamSpeed("Second Foam Speed", Float) = 0.1
_MainFoamScale("Main Foam Scale", Float) = 2
[HideInInspector] __dirty( "", Int ) = 1
}
SubShader
{
Tags{ "RenderType" = "TransparentCutout" "Queue" = "AlphaTest+0" "IgnoreProjector" = "True" "ForceNoShadowCasting" = "True" "IsEmissive" = "true" }
Cull Back
CGPROGRAM
#include "UnityShaderVariables.cginc"
#pragma target 3.5
#pragma multi_compile_instancing
#pragma only_renderers d3d11 glcore gles gles3 metal
#pragma surface surf Unlit keepalpha noshadow novertexlights nolightmap nodynlightmap nodirlightmap nometa noforwardadd vertex:vertexDataFunc
struct Input
{
float2 vertexToFrag32;
float2 vertexToFrag33;
float4 vertexColor : COLOR;
};
uniform float _MainFoamSpeed;
uniform float _MainFoamScale;
uniform sampler2D _RippleFoam;
uniform float _SecondFoamSpeed;
uniform float _Cutoff = 0.5;
void vertexDataFunc( inout appdata_full v, out Input o )
{
UNITY_INITIALIZE_OUTPUT( Input, o );
float temp_output_30_0 = ( _MainFoamSpeed * 0.15 );
float2 appendResult31 = (float2(temp_output_30_0 , temp_output_30_0));
float2 panner8 = ( ( appendResult31 * _Time.y ).x * float2( 0,1 ) + v.texcoord.xy);
float2 temp_output_22_0 = ( panner8 * _MainFoamScale );
o.vertexToFrag32 = temp_output_22_0;
float temp_output_15_0 = ( _SecondFoamSpeed * 0.15 );
float2 appendResult18 = (float2(temp_output_15_0 , temp_output_15_0));
o.vertexToFrag33 = ( temp_output_22_0 + ( appendResult18 * _Time.y ) );
}
inline fixed4 LightingUnlit( SurfaceOutput s, half3 lightDir, half atten )
{
return fixed4 ( 0, 0, 0, s.Alpha );
}
void surf( Input i , inout SurfaceOutput o )
{
o.Emission = float4(1,1,1,0).rgb;
o.Alpha = 1;
float lerpResult40 = lerp( 0.5 , ( tex2D( _RippleFoam, i.vertexToFrag32 ).g + tex2D( _RippleFoam, i.vertexToFrag33 ).r ) , i.vertexColor.r);
clip( lerpResult40 - _Cutoff );
}
ENDCG
}
CustomEditor "ASEMaterialInspector"
}