虚幻4的Shader宏

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虚幻4的shader宏简直丧心病狂，上图感受一下

如何正确理解它们是怎么嵌套的呢，下面我敲了个极短的控制台示例

#include <iostream>
#include <string>
using namespace std;

class Shader
{
public:
	void ShowShader()
	{
		cout << shaderindex << endl;
	}
	int shaderindex;
};

class Material
{
public:

	void ShowMaterial()
	{
		cout << MaterialName << endl;
	}

	string MaterialName;
};

#define CREATESHADER(ShaderName) Shader Shader##ShaderName
#define CREATEMATERIAL(MatName) Material Material##MatName

#define CREATESHADERANDMATERIAL(ShaderName, MatName)\
								CREATESHADER(ShaderName); \
								CREATEMATERIAL(MatName);

CREATESHADERANDMATERIAL(MyShader, MyMaterial)

int main()
{
	ShaderMyShader.shaderindex = 10;
	ShaderMyShader.ShowShader();
	MaterialMyMaterial.MaterialName = "MyMaterial";
	MaterialMyMaterial.ShowMaterial();

	system("Pause");
	return 0;
}

输出结果为

通过这个小例子就能理解庞大的虚幻的shader宏啦。

Enjoy It！