将指针函数移植到c#

Question

我在C中有以下内容

typedef void (*procfunc)(V2fT2f *, float);

typedef struct {
    procfunc func;
    procfunc degen;
} Filter;

const Filter filter[] = {
    { brightness             },
    { contrast               },
    { extrapolate, greyscale },
    { hue                    },
    { extrapolate, blur      }, // The blur could be exaggerated by downsampling to half size
};

我把它带到C#给我这个

public delegate void procfunc(ImagingDefs.V2fT2f[] quad,float t);

    public class Filter
    {
        public procfunc func;
        public procfunc degen;
    };

    public Filter[] filter = new Filter[]
    {
        new Filter { func = brightness },
        new Filter { func = contrast },
        new Filter { func = extrapolate, degen = greyscale },
        new Filter { func = hue },
        new Filter { func = extrapolate, degen = blur } // The blur could be exaggerated by downsampling to half size
    };

我的问题是我搞错了

A field initializer cannot reference the nonstatic field, method or property.

我有一种感觉，问题是委托，但我不确定-我从来没有需要移植这类代码之前。

ImagingDefs和V2fT2f都不被声明为静态

被调用的方法通常是

public void foo(ImagingDefs.V2fT2f[]quad, float t)

没有任何地方是静态的。

名称V2fT2f来自原始源代码

Answer 1

字段初始化器不能引用非静态字段、方法或属性。指的是过滤器方法，如brightness。

如果要在字段初始化器filter中引用这些方法，它们必须是静态的。

另一个选项是在要定义的类的构造函数中初始化该字段。

例如。

public class MyNewClass
{
    public delegate void procfunc(ImagingDefs.V2fT2f[] quad,float t);

    public class Filter
    {
        public procfunc func;
        public procfunc degen;
    };

    public Filter[] filter;

    public MyNewClass()
    {
        filter = new Filter[]
        {
            new Filter { func = brightness },
            new Filter { func = contrast },
            new Filter { func = extrapolate, degen = greyscale },
            new Filter { func = hue },
            new Filter { func = extrapolate, degen = blur } // The blur could be exaggerated by downsampling to half size
        };
    }   
}