经常看到有这样的画面，一个美人在翩翩起舞，而我们站在旁边就可以与她进行合影，拍照。但是怎么实现？这里需要很多配合。别的不说，程序这块需要编写Shader（这一步估计把80%的开发工程师剔除了），当然本大大不在此列。 如下图
Iphone7拍的都这么差，可能环境光影响
代码：
代码语言：javascript复制Shader "Custom/ARVideo"
{
Properties
{
_Color ("Color", Color) = (1,1,1,1)
_MainTex ("Albedo (RGB)", 2D) = "white" {}
_AlphaVideo ("Alpha Video(R)", 2D) = "white" {}
_Glossiness ("Smoothness", Range(0,1)) = 0.5
_Metallic ("Metallic", Range(0,1)) = 0.0
}
SubShader
{
Tags { "Queue"="Transparent" "RenderType"="Transparent" }
LOD 200
CGPROGRAM
// Physically based Standard lighting model, and enable shadows on all light types
#pragma surface surf Standard alpha
// Use shader model 3.0 target, to get nicer looking lighting
#pragma target 3.0
sampler2D _MainTex;
sampler2D _AlphaVideo;
struct Input {
float2 uv_MainTex;
float2 uv_AlphaVideo;
};
half _Glossiness;
half _Metallic;
fixed4 _Color;
void surf (Input IN, inout SurfaceOutputStandard o) {
// Albedo comes from a texture tinted by color
fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
fixed4 _alpha = tex2D (_AlphaVideo, IN.uv_AlphaVideo);
o.Albedo = c.rgb;
// Metallic and smoothness come from slider variables
o.Metallic = _Metallic;
o.Smoothness = _Glossiness;
o.Alpha = _alpha.r;
}
ENDCG
}
FallBack "Diffuse"
} 另一种Shader
代码语言：javascript复制Shader "Custom/ARMovieShader" {
Properties {
_MainTex ("Albedo (RGB)", 2D) = "white" {}
}
SubShader{
Tags {"Queue" = "Transparent" "RenderType" = "Transparent"}
LOD 200
CGPROGRAM
#pragma surface surf Nolighting alpha
#pragma target 3.0
sampler2D _MainTex;
struct Input {
float2 uv_MainTex;
};
fixed4 LightingNoLighting(SurfaceOutput s, fixed3 lightDir, fixed atten)
{
fixed c;
c.rgb = s.Albedo;
c.a = s.Alpha;
return c;
}
void surf (Input IN, inout SurfaceOutput o) {
o.Emission = tex2D (_MainTex, IN.uv_MainTex).rgb;
if (IN.uv_MainTex.x >= 0.5)
{
o.Alpha = 0;
}
else
{
o.Alpha = tex2D(_MainTex, float2(IN.uv_MainTex.x 0.5, IN.uv_MainTex.y)).rgb;
}
}
ENDCG
}
FallBack "Diffuse"
}透明视频的制作
- 1.下载Adobe After Effects软件
- 操作步骤
- 01-找到文件素材，打开
- 02-新建合成（Ctrl N），点击OK按钮即可
- 03-将素材拖进合成里面，调整（S键可以调整），复制一份并命名保存
- 04-在合成窗口中右键创建白色的固态层，调整位置在素材的下面，选择Alpha模式为Alpha Matte的视频文件
- 05-新建合成，最好将视频宽度放大为原视频的两倍
- 06-将之前的合成视频（03）放入（05），设置成一般的模式即可
- 07-将之前的（04）合成放入新和成，作为另一半
- 08选择合成（Ctrl M）输出MP4
- 操作步骤
