Question

I want to add a C-style struct to a C++ header and use it in a C function. But this is not working:

struct Vertex {
float Position[2];
float Color[4];
};

struct Square{
Vertex vertices[4];
};

Elsewhere:

float color[4]={rColor, gColor, bColor, alpha};
float halfsize=(float)size/2;

Square square= {
    {{halfsize,halfsize},{color[0],color[1],color[2],color[3]}},
    {{halfsize,-halfsize},{color[0],color[1],color[2],color[3]}}, //error on this line
    {{-halfsize,-halfsize},{color[0],color[1],color[2],color[3]}},
    {{-halfsize,halfsize},{color[0],color[1],color[2],color[3]}}
};

Reports “Excess elements in struct initializer” on the second line.

On a related note, is there a more efficient way to pass in the array color to the square set?

Answer 1

You need to add an extra brace for the initializer for Vertex vertices[4];

                \/   
Square square= {{
    {{halfsize,halfsize},{color[0],color[1],color[2],color[3]}},
    {{halfsize,-halfsize},{color[0],color[1],color[2],color[3]}}, //error on this line
    {{-halfsize,-halfsize},{color[0],color[1],color[2],color[3]}},
    {{-halfsize,halfsize},{color[0],color[1],color[2],color[3]}}
}};
^