几何变换_扭曲01
2020-07-02 本文已影响0人
Rayson
1.空白shader
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
v2f o;
o.pos= UnityObjectToClipPos(v.vertex);
o.color= fixed4(1,1,1,1);
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
float angle=length(v.vertex)*_SinTime.w ; //模长计算
//加入旋转矩阵
float4x4 m =
{
float4(cos(angle),0,sin(angle),0),
float4(0,1,0,1),
float4(-sin(angle),0,cos(angle),0),
float4(0,0,0,1)
};
float4x4 p = UNITY_MATRIX_MVP;
m =mul(p,m);
v2f o;
o.pos= mul(m,v.vertex); //传入矩阵变换
o.color= fixed4(0,1,1,1); //以高度作为颜色
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
效果参考
矩阵优化
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
float angle=length(v.vertex)*_SinTime.w ; //模长计算
float x = cos(angle)*v.vertex.x + sin(angle)*v.vertex.z;
float z = cos(angle)*v.vertex.z - sin(angle)*v.vertex.x;
v.vertex.x = x;
v.vertex.z = z;
v2f o;
float4x4 p = UNITY_MATRIX_MVP; //用MVP矩阵去变换新矩阵
o.pos= mul(p,v.vertex); //传入矩阵变换
o.color= fixed4(0,1,1,1); //以高度作为颜色
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
Z方向顶点缩放 效果
矩阵公式
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
float angle=length(v.vertex)*_SinTime.w ; //模长计算
// float x = cos(angle)*v.vertex.x + sin(angle)*v.vertex.z;
// float z = cos(angle)*v.vertex.z - sin(angle)*v.vertex.x;
// v.vertex.x = x;
// v.vertex.z = z;
float4x4 m =
{
float4(sin(angle),0,0,0),
float4(0,1,0,1),
float4(0,0,1,0),
float4(0,0,0,1)
};
v.vertex = mul(m,v.vertex);
v2f o;
float4x4 p = UNITY_MATRIX_MVP; //用MVP矩阵去变换新矩阵
o.pos= mul(p,v.vertex); //传入矩阵变换
o.color= fixed4(0,1,1,1); //以高度作为颜色
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
效果
通过给 x值做效果限制 限制在0-1之间
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
float angle=length(v.vertex)*_SinTime.w ; //模长计算
// float x = cos(angle)*v.vertex.x + sin(angle)*v.vertex.z;
// float z = cos(angle)*v.vertex.z - sin(angle)*v.vertex.x;
// v.vertex.x = x;
// v.vertex.z = z;
float4x4 m =
{
float4(sin(angle)/8+0.5 ,0,0,0), //X/2+0.5 把值限制在0 - 1之间
float4(0,1,0,1),
float4(0,0,1,0),
float4(0,0,0,1)
};
v.vertex = mul(m,v.vertex);
v2f o;
float4x4 p = UNITY_MATRIX_MVP; //用MVP矩阵去变换新矩阵
o.pos= mul(p,v.vertex); //传入矩阵变换
o.color= fixed4(0,1,1,1); //以高度作为颜色
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
随时间因子做匀速变化
Shader "Unlit/niuqu"
{
SubShader{
pass{
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "UnityCG.cginc"
struct a2v
{
float4 vertex : POSITION;
};
struct v2f {
float4 pos:POSITION;
float4 color:COLOR;
};
v2f vert(appdata_base v )
{
// float angle=length(v.vertex)*_SinTime.w ; //模长计算
// float x = cos(angle)*v.vertex.x + sin(angle)*v.vertex.z;
// float z = cos(angle)*v.vertex.z - sin(angle)*v.vertex.x;
// v.vertex.x = x;
// v.vertex.z = z;
float angle = v.vertex.z+_Time.y ; //z值+缩放时间因子 会得出随着时间叠加不断变 匀速扭曲的效果
float4x4 m =
{
float4(sin(angle)/8+0.5 ,0,0,0), //X/2+0.5 把值限制在0 - 1之间
float4(0,1,0,1),
float4(0,0,1,0),
float4(0,0,0,1)
};
v.vertex = mul(m,v.vertex);
v2f o;
float4x4 p = UNITY_MATRIX_MVP; //用MVP矩阵去变换新矩阵
o.pos= mul(p,v.vertex); //传入矩阵变换
o.color= fixed4(0,1,1,1); //以高度作为颜色
return o;
}
fixed4 frag(v2f i):SV_TARGET //返回类型要统一 传入传出类型一定要一致
{
return i.color;
}
ENDCG
}
}
}
image.png
