// compile with: dmd vector.d -inline -O -release -w -g
// debug with:   windbg vector.exe

import std.stdio;
import std.string;
import std.c.windows.windows;

struct Vector3(T) {
	T x, y, z;

	string toString() {
		return "("  ~ format("%g", x) ~ " " ~ format("%g", y) ~ " " ~ format("%g", z) ~ ")";
	}

	void opAddAssign(Vector3 v) {
		x += v.x;
		y += v.y;
		z += v.z;
	}

	void opSubAssign(ref Vector3 v) {
		x += v.x;
		y += v.y;
		z += v.z;
	}

	Vector3 opMul(T s) {
		return Vector3(x * s, y * s, z * s);
	}
}

alias Vector3!(float) Vector3f;

int main(char[][] args) {
	long start, end, freq;
	QueryPerformanceFrequency(&freq);
	Vector3f v1 = {1.0f, 2.0f, 3.0f};
	Vector3f v2 = {4.0f, 5.0f, 6.0f};
	writefln(v1, " ", v2);

	// first
	QueryPerformanceCounter(&start);
	for (int i=0; i<0x40FFFFFF; i++) {
		v1 += v2 * 3.0f;
	}
	QueryPerformanceCounter(&end);
	writefln("%.3fs", (end - start) / cast(float)freq);

	// second
	QueryPerformanceCounter(&start);
	for (int i=0; i<0x40FFFFFF; i++) {
		v1 -= v2 * 3.0f;
	}
	QueryPerformanceCounter(&end);
	writefln("%.3fs", (end - start) / cast(float)freq);

	// third
	QueryPerformanceCounter(&start);
	for (int i=0; i<0x40FFFFFF; i++) {
		v1.x += v2.x * 3.0f;
		v1.y += v2.y * 3.0f;
		v1.z += v2.z * 3.0f;
	}
	QueryPerformanceCounter(&end);
	writefln("%.3fs", (end - start) / cast(float)freq);

	writefln(v1, " ", v2);
	return 0;
}