#include "vector4.h"


void setVector4 (Vector4 v, float a, float b, float c, float d)
{
	v[0]=a;
	v[1]=b;
	v[2]=c;
	v[3]=d;
}

void copyVector4 (Vector4 v, Vector4 res)
{
	int i;
	for (i=0; i<4; i++) res[i] = v[i];
}

void crossProductVector4 (Vector4 v1, Vector4 v2, Vector4 res) {

	res[0] = v1[1]*v2[2] - v1[2]*v2[1];
	res[1] = v1[2]*v2[0] - v1[0]*v2[2];
	res[2] = v1[0]*v2[1] - v1[1]*v2[0];
	res[3] = 0.;
}

void normalizeVector4 (Vector4 v) {

	float norm = sqrt(v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
	if (norm != 0.)
	{
		v[0] /= norm;
		v[1] /= norm;
		v[2] /= norm;
	}
}

void sumVector4 (Vector4 v1, Vector4 v2, Vector4 res) {

	res[0] = v1[0]+v2[0];
	res[1] = v1[1]+v2[1];
	res[2] = v1[2]+v2[2];
	res[3] = v1[3];
}

void diffVector4 (Vector4 v1, Vector4 v2, Vector4 res) {

	res[0] = v1[0]-v2[0];
	res[1] = v1[1]-v2[1];
	res[2] = v1[2]-v2[2];
	res[3] = 0.;
}

void multFloatVector4 (float f, Vector4 v, Vector4 res) {

	res[0] = f*v[0];
	res[1] = f*v[1];
	res[2] = f*v[2];
	res[3] = v[3];
}