float4 type (union)

gistfile1.c

#include <stdio.h>

struct float4 {
        union {
                struct { float r, g, b, a; };
                struct { float x, y, z, w; };
                float at[4];
        };
};

inline void float4_copy(struct float4 *const dst,
                        struct float4 const *const src) {

}

inline void float4_zero(struct float4 *const val) {
        val->x = val->y = val->z = val->w = 0.0;
}

inline void float4_dot() {

}

inline void float4_norm() {

}

int main(int argc, char* argv[]) {

        struct float4 col;
        float4_set(&col, 0.666, 0.666, 0.666, 0.666);

        printf("%f %f %f %f\n", col.r, col.g, col.b, col.a);

        float4_zero(&col);

        col.a = 0.666;
        col.at[2] = 1.112;

        float* p = &col.r;
        p[1] = 0.4242;

        printf("%f %f %f %f\n", col.r, col.g, col.b, col.a);

        return 0;
}