Question

I am trying to pass an array containing an X, Y, and Z coordinate (type float) to the function glTranslatef() however I can’t figure out a way to accomplish this.

As an example of what I am trying to accomplish;

float xyz[3] = {3,2,1};
glTranslatef(xyz);

I get the following error whenever I try to attempt something like this

cannot convert ‘float*’ to ‘GLfloat {aka float}’ for argument ‘1’ to ‘void glTranslatef(GLfloat, GLfloat, GLfloat)’

I have tried searching all over google but I couldn’t find what I was looking for.

Answer 1

glTranslatef takes three float arguments, not one array argument. That’s the end of it.

float XYZ[3] = {3,2,1};
glTranslatef(XYZ[0], XYZ[1], XYZ[2]);

If you’re really desperate you can unpack it with a macro:

#define UNPACK_TRI_ARRAY(ar) ar[0], ar[1], ar[2]

float XYZ[3] = {3,2,1};
glTranslatef(UNPACK_TRI_ARRAY(XYZ));

But once you get to that point, you have to ask yourself why.