VertexShader几何变换顶点颜色变换1

1、顶点颜色变换

// Upgrade NOTE: replaced &＃39;mul(UNITY_MATRIX_MVP,*)&＃39; with &＃39;UnityObjectToClipPos(*)&＃39;Shader "Custom/s_nine" {SubShader{pass {CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "unitycg.cginc"float4x4 mvp;float4x4 rm;float4x4 sm;struct v2f {float4 pos:POSITION;fixed4 color : COLOR;};v2f vert(appdata_base v) {v2f o;float4x4 m &＃61; mul(sm, UNITY_MATRIX_MVP);o.pos &＃61; mul(m,v.vertex);if (float(v.vertex.x) > 0)o.color &＃61; fixed4(1, 0, 0, 1); //显示为红色elseo.color &＃61; fixed4(0,0,1,1); //显示为蓝色return o;}fixed4 frag(v2f IN) :COLOR{return IN.color;}ENDCG}}
}

运行结果&＃xff1a;中间颜色自动渐变

2、改变某个顶点的颜色值

// Upgrade NOTE: replaced &＃39;mul(UNITY_MATRIX_MVP,*)&＃39; with &＃39;UnityObjectToClipPos(*)&＃39;Shader "Custom/s_nine" {SubShader{pass {CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "unitycg.cginc"float4x4 mvp;float4x4 rm;float4x4 sm;struct v2f {float4 pos:POSITION;fixed4 color : COLOR;};v2f vert(appdata_base v) {v2f o;float4x4 m &＃61; mul(sm, UNITY_MATRIX_MVP);o.pos &＃61; mul(m,v.vertex);if (float(v.vertex.x) &＃61;&＃61; 0.5&&v.vertex.y&＃61;&＃61;0.5&&v.vertex.z&＃61;&＃61;0.5)o.color &＃61; fixed4(1, 0, 0, 1); //显示为红色elseo.color &＃61; fixed4(0,0,1,1); //显示为蓝色return o;}fixed4 frag(v2f IN) :COLOR{return IN.color;}ENDCG}}
}

3、

在不同的位置&＃xff0c;颜色不一样

4、加上时间因子后&＃xff0c;颜色的变化

// Upgrade NOTE: replaced &＃39;mul(UNITY_MATRIX_MVP,*)&＃39; with &＃39;UnityObjectToClipPos(*)&＃39;Shader "Custom/s_nine" {SubShader{pass {CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#include "unitycg.cginc"float4x4 mvp;float4x4 rm;float4x4 sm;struct v2f {float4 pos:POSITION;fixed4 color : COLOR;};v2f vert(appdata_base v) {v2f o;float4x4 m &＃61; mul(sm, UNITY_MATRIX_MVP);o.pos &＃61; mul(m,v.vertex);if (float(v.vertex.x) &＃61;&＃61; 0.5&&v.vertex.y &＃61;&＃61; 0.5&&v.vertex.z &＃61;&＃61; 0.5)o.color &＃61; fixed4(_SinTime.w/2&＃43;0.5,_CosTime.w/2&＃43;0.5,_SinTime.y/2 &＃43; 0.5,1); //显示为红色elseo.color &＃61; fixed4(0, 0, 1, 1); //显示为蓝色return o;}fixed4 frag(v2f IN) :COLOR{return IN.color;}ENDCG}}
}