目的

便于后续自己的 CTRL+C,V的面向复制、粘贴编程

思路

非常简单：可以使用 perlin noise，simple noise 或是其他的 noise 函数，又或是 noise tex 来提取顶点 xyz 的偏移

然后 vs 里便宜就好了，需要阴影跟随飘动的投影就加上 “LightMode”=“ShadowCaster” 的 pass

Script

include cginc

#ifndef __WIND_COMMON_H__
#define __WIND_COMMON_H__// jave.lin 2021/04/13#include "UnityCG.cginc"#if defined(_WIND_ON)half  _WindSpeed;
half    _WindWavesScale;
half    _WindForce;
half4   _WindDir;
half    _MoveHeight;
half    _MoveHeightPow;float3 mod3D289(float3 x) { return x - floor(x / 289.0) * 289.0; }float4 mod3D289(float4 x) { return x - floor(x / 289.0) * 289.0; }float4 permute(float4 x) { return mod3D289((x * 34.0 + 1.0) * x); }float4 taylorInvSqrt(float4 r) { return 1.79284291400159 - r * 0.85373472095314; }float snoise(float3 v)
{const float2 C = float2(1.0 / 6.0, 1.0 / 3.0);float3 i = floor(v + dot(v, C.yyy));float3 x0 = v - i + dot(i, C.xxx);float3 g = step(x0.yzx, x0.xyz);float3 l = 1.0 - g;float3 i1 = min(g.xyz, l.zxy);float3 i2 = max(g.xyz, l.zxy);float3 x1 = x0 - i1 + C.xxx;float3 x2 = x0 - i2 + C.yyy;float3 x3 = x0 - 0.5;i = mod3D289(i);float4 p = permute(permute(permute(i.z + float4(0.0, i1.z, i2.z, 1.0)) + i.y + float4(0.0, i1.y, i2.y, 1.0)) + i.x + float4(0.0, i1.x, i2.x, 1.0));float4 j = p - 49.0 * floor(p / 49.0);  // mod(p,7*7)float4 x_ = floor(j / 7.0);float4 y_ = floor(j - 7.0 * x_);  // mod(j,N)float4 x = (x_ * 2.0 + 0.5) / 7.0 - 1.0;float4 y = (y_ * 2.0 + 0.5) / 7.0 - 1.0;float4 h = 1.0 - abs(x) - abs(y);float4 b0 = float4(x.xy, y.xy);float4 b1 = float4(x.zw, y.zw);float4 s0 = floor(b0) * 2.0 + 1.0;float4 s1 = floor(b1) * 2.0 + 1.0;float4 sh = -step(h, 0.0);float4 a0 = b0.xzyw + s0.xzyw * sh.xxyy;float4 a1 = b1.xzyw + s1.xzyw * sh.zzww;float3 g0 = float3(a0.xy, h.x);float3 g1 = float3(a0.zw, h.y);float3 g2 = float3(a1.xy, h.z);float3 g3 = float3(a1.zw, h.w);float4 norm = taylorInvSqrt(float4(dot(g0, g0), dot(g1, g1), dot(g2, g2), dot(g3, g3)));g0 *= norm.x;g1 *= norm.y;g2 *= norm.z;g3 *= norm.w;float4 m = max(0.6 - float4(dot(x0, x0), dot(x1, x1), dot(x2, x2), dot(x3, x3)), 0.0);m = m * m;m = m * m;float4 px = float4(dot(x0, g0), dot(x1, g1), dot(x2, g2), dot(x3, g3));return 42.0 * dot(m, px);
}void windNoiseHandle(inout float4 posOS, float modelY, float uv_v)
{if (_MoveHeight <= 0) return; jave.lin 2021/12/13 : 新版本的方式，目前暂时没用上 uv//float hT = modelY / _MoveHeight;//float3 positionOS = posOS;//float windSpeed = _Time.y * (_WindSpeed * 5);//float3 noisePos = (positionOS + windSpeed) * _WindWavesScale;//float windNoise = snoise(noisePos) * (_WindForce * 30);//windNoise *= hT;//windNoise *= pow(hT, _MoveHeightPow);//posOS.xyz = positionOS + _WindDir.xyz * windNoise;// jave.lin : 旧版本的方式float3 positionOS = posOS;float windSpeed = _Time.y * (_WindSpeed * 5);float windNoise = snoise((mul(unity_ObjectToWorld, posOS) + windSpeed) * _WindWavesScale);windNoise = (windNoise * 0.01);//#ifdef _FIXTHEBASEOFFOLIAGE_ON//    windNoise = (windNoise * pow(uv_v, 2.0));//#endif//windNoise = (windNoise * pow(uv_v, 2.0));windNoise = (windNoise * pow(modelY / _MoveHeight, _MoveHeightPow));windNoise = (windNoise * (_WindForce * 30));posOS.xyz += (_WindDir.xyz * windNoise) * (1 + (sin(_Time.y * 0.5) * 0.5 + 0.5));
}#define VERT_WIND(wpos, modelY, uv_v) windNoiseHandle(wpos, modelY, uv_v);#else
#define VERT_WIND(wpos, modelY, uv_v)
#endif#endif

appled shader

// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)Shader "OnePiece/Legacy Shaders/Transparent/Cutout/Diffuse_DoubleSide_Wind" {Properties {_Color ("Main Color", Color) = (1,1,1,1)_MainTex ("Base (RGB) Trans (A)", 2D) = "white" {}_Cutoff ("Alpha cutoff", Range(0,1)) = 0.5
}SubShader {Tags {"Queue"="AlphaTest" "IgnoreProjector"="True" "RenderType"="TransparentCutout"}LOD 200Cull OffCGPROGRAM
#define _WIND_ON
#pragma surface surf Lambert fullforwardshadows addshadow alphatest:_Cutoff vertex:vert// include 引入
#include "Includes/CG/WindCommon.cginc"sampler2D _MainTex;
fixed4 _Color;struct Input {float2 uv_MainTex;
};void vert(inout appdata_full v)
{// 应用VERT_WIND(v.vertex, v.vertex.y, v.texcoord.y)
}void surf (Input IN, inout SurfaceOutput o) {fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;o.Albedo = c.rgb;o.Alpha = c.a;
}
ENDCG
}Fallback "Legacy Shaders/Transparent/Cutout/VertexLit"
}

csharp

// jave.lin 2021/04/13using UnityEngine;#if UNITY_EDITOR
using UnityEditor;
#endif[ExecuteInEditMode]
public class WindArgsController : MonoBehaviour
{private static int _WindForce = Shader.PropertyToID("_WindForce");private static int _WindWavesScale = Shader.PropertyToID("_WindWavesScale");private static int _WindSpeed = Shader.PropertyToID("_WindSpeed");private static int _WindStrengthen = Shader.PropertyToID("_WindStrengthen");private static int _WindDir = Shader.PropertyToID("_WindDir");private static int _MoveHeight = Shader.PropertyToID("_MoveHeight");private static int _MoveHeightPow = Shader.PropertyToID("_MoveHeightPow");public bool windToggle = true;private bool lastWindToggle = false;[Range(0.0f, 1.0f)]public float WindSpeed = 0.3f;private float lastWindSpeed;[Range(0.0f, 1.0f)]public float WindStrengthen = 1;private float lastWindStrengthen = 1;[Range(0.0f, 1.0f)]public float WindWavesScale = 0.25f;private float lastWindWavesScale;[Range(0.0f, 1.0f)]public float WindForce = 0.5f;private float lastWindForce;public bool DirFromForward = true;public Vector4 WindDir = new Vector4(1, 0, 0, 0);private Vector4 lastWindDir;public float MoveHeight = 5.0f;private float lastMoveHeight;[Range(0.001f, 5.0f)]public float MoveHeightPow = 1.0f;private float lastMoveHeightPow;#if UNITY_EDITORpublic float GizmosDirLineSize = 8.0f;public Color GizmosDirLineColor = Color.green;public Color GizmosCircleColor = Color.red;public int GizmosDirHeadCircleLineSegmentNum = 12;public int GizmosDirHeadCircleLineRadius = 2;
#endifprivate void Start(){WindDir = transform.forward;if (windToggle)Shader.EnableKeyword("_WIND_ON");elseShader.DisableKeyword("_WIND_ON");Shader.SetGlobalFloat(_WindSpeed, WindSpeed);Shader.SetGlobalFloat(_WindWavesScale, WindWavesScale);Shader.SetGlobalFloat(_WindForce, WindForce);Shader.SetGlobalVector(_WindDir, WindDir);Shader.SetGlobalFloat(_MoveHeight, MoveHeight);Shader.SetGlobalFloat(_MoveHeightPow, MoveHeightPow);}private void Update(){if (lastWindToggle != windToggle){lastWindToggle = windToggle;if (windToggle)Shader.EnableKeyword("_WIND_ON");elseShader.DisableKeyword("_WIND_ON");}if (lastWindSpeed != WindSpeed){lastWindSpeed = WindSpeed;Shader.SetGlobalFloat(_WindSpeed, WindSpeed);}if (lastWindStrengthen != WindStrengthen){lastWindStrengthen = WindStrengthen;Shader.SetGlobalFloat(_WindStrengthen, WindStrengthen);}if (lastWindWavesScale != WindWavesScale){lastWindWavesScale = WindWavesScale;Shader.SetGlobalFloat(_WindWavesScale, WindWavesScale);}if (lastWindForce != WindForce){lastWindForce = WindForce;Shader.SetGlobalFloat(_WindForce, WindForce);}if (DirFromForward){WindDir = transform.forward;}if (!lastWindDir.Equals(WindDir)){lastWindDir = WindDir;Shader.SetGlobalVector(_WindDir, WindDir);}if (lastMoveHeight != MoveHeight){lastMoveHeight = MoveHeight;Shader.SetGlobalFloat(_MoveHeight, MoveHeight);}if (lastMoveHeightPow != MoveHeightPow){lastMoveHeightPow = MoveHeightPow;Shader.SetGlobalFloat(_MoveHeightPow, MoveHeightPow);}}#if UNITY_EDITORprivate void OnDrawGizmos(){// jave.lin 2021/12/13 - 添加实现 风向 显示的 Gizmosvar transWPos = transform.position;Vector3 transForward;if (DirFromForward){transForward = transform.forward;}else{transForward = WindDir;}// back up gizmos colvar srcCol = Gizmos.color;int count = GizmosDirHeadCircleLineSegmentNum;float curAngle = 0;float perIterateAngle = (2.0f * Mathf.PI) / count;// center lineGizmos.color = GizmosCircleColor;Gizmos.DrawLine(transWPos, transWPos + transForward * GizmosDirLineSize);// local to world matvar L2WMat = transform.localToWorldMatrix;for (int i = 0; i < count; i++){// draw circleGizmos.color = GizmosCircleColor;var cx = Mathf.Cos(curAngle);var cy = Mathf.Sin(curAngle);var cv = new Vector3(cx, cy, 0) * GizmosDirHeadCircleLineRadius;cv = L2WMat.MultiplyVector(cv);curAngle += perIterateAngle;var nx = Mathf.Cos(curAngle);var ny = Mathf.Sin(curAngle);var nv = new Vector3(nx, ny, 0) * GizmosDirHeadCircleLineRadius;nv = L2WMat.MultiplyVector(nv);Gizmos.DrawLine(transWPos + cv, transWPos + nv);// draw dir lineGizmos.color = GizmosDirLineColor;Gizmos.DrawLine(transWPos + cv, transWPos + cv + transForward * GizmosDirLineSize);}// recovery gizmos colorGizmos.color = srcCol;}
#endif
}

效果

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Unity Shader - 板砖日志 - 简单的树、草等植物的随风飘扬动画

文章目录

目的

思路

Script

include cginc

appled shader

csharp

效果

Unity Shader - 板砖日志 - 简单的树、草等植物的随风飘扬动画相关推荐

最新文章

热门文章

Unity Shader - 板砖日志 - 简单的树、草 等植物的 随风飘扬 动画

文章目录

目的

思路

Script

include cginc

appled shader

csharp

效果

Unity Shader - 板砖日志 - 简单的树、草 等植物的 随风飘扬 动画相关推荐

最新文章

热门文章

Unity Shader - 板砖日志 - 简单的树、草等植物的随风飘扬动画

Unity Shader - 板砖日志 - 简单的树、草等植物的随风飘扬动画相关推荐