unity中草实现举例
https://blog.csdn.net/qq_38275140/article/details/89070146
https://roystan.net/articles/grass-shader.html
https://blog.csdn.net/yangxuan0261/article/details/90382630
1、草的mesh网格
草的主纹理：
草的采样shader：
Shader "Unlit/GrassShader"
{
Properties
{
_MainTex ("Texture", 2D) = "white" {}
}
SubShader
{
Tags { "RenderType"="Opaque" }
Pass
{
Cull Off //背面剔除关闭，使草正反面都绘制
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct appdata
{
float4 vertex : POSITION;
float2 uv : TEXCOORD0;
};
struct v2f
{
float2 uv : TEXCOORD0;
float4 vertex : SV_POSITION;
};
sampler2D _MainTex;
float4 _MainTex_ST;
v2f vert (appdata v)
{
v2f o;
o.vertex = UnityObjectToClipPos(v.vertex);
o.uv = TRANSFORM_TEX(v.uv, _MainTex);
return o;
}
fixed4 frag (v2f i) : SV_Target
{
fixed4 col = tex2D(_MainTex, i.uv);
clip(col.a - 0.5); //剔除alpha小于0.5的点
return col;
}
ENDCG
}
}
}
给顶点定义动画：
待续……
这个顶点动画，属于私密文件。哈哈