Vector and Union
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#include <stdio.h>
typedef union
{
struct
{
unsigned int x , y;
};
unsigned int e[2];
}v2;
typedef union
{
struct
{
unsigned int x , y , z;
};
struct
{
unsigned int r , g , b;
};
v2 xy;
unsigned int e[3];
}v3;
typedef union
{
struct
{
unsigned int x , y , z , w;
};
struct
{
unsigned int r , g , b , a;
};
v3 xyz;
v3 rgb;
unsigned int e[4];
}v4;
// v2add , v3add , v4add
#define vXaddDefine(Elements) \
void v##Elements##add(unsigned int *Result,unsigned int *First,unsigned int *Second) \
{ \
for(int i = 0; \
i < Elements; \
i++) \
Result[i] = First[i] + Second[i]; \
}
vXaddDefine(2)
vXaddDefine(3)
vXaddDefine(4)
// vAdd, pass in vector size
void vAdd(unsigned int *Result,unsigned int *First,unsigned int *Second, int Elements)
{
for(int i = 0;
i < Elements;
i++)
Result[i] = First[i] + Second[i];
}
int main() {
v4 aero = {};
aero.x = 5;
aero.y = 3;
aero.z = 9;
aero.w = 100;
v4add(aero.e,aero.e,aero.e); //Equivalent functions
vAdd(aero.e,aero.e,aero.e,4);
printf("%i\n",aero.x);
printf("%i\n",aero.y);
printf("%i\n",aero.z);
printf("%i\n",aero.w);
printf("\n");
v2 llll;
llll.x = 1;
llll.y = 2;
printf("v2.x %i\n",llll.x);
printf("v2.y %i\n",llll.y);
printf("v2.e[0] %i\n",llll.e[0]);
printf("v2.e[1] %i\n",llll.e[1]);
return 0;
}
C
INFO