#ifndef HANDMADE_MATH_H
#define HANDMADE_MATH_H

/* TODO: Make these static. */
struct v2 {
    float x, y;
    float e[2];
};

struct v2 V2(float x, float y)
{
    struct v2 result;

    result.x = x;
    result.y = y;

    return result;
}

struct v2 V2Multiply(float a, struct v2 b)
{
    struct v2 result;

    result.x = a * b.x;
    result.y = a * b.y;

    return result;
}

struct v2 V2Unary(struct v2 a)
{
    struct v2 result;

    result.x = -a.x;
    result.y = -a.y;

    return result;
}

struct v2 V2Add(struct v2 a, struct v2 b)
{
    struct v2 result;

    result.x = a.x + b.x;
    result.y = a.y + b.y;

    return result;
}

struct v2 V2Subtract(struct v2 a, struct v2 b)
{
    struct v2 result;

    result.x = a.x - b.x;
    result.y = a.y - b.y;

    return result;
}

float Square(float a)
{
    float result;

    result = a * a;

    return result;
}

float InnerProduct(struct v2 a, struct v2 b)
{
    float result = a.x*b.x + a.y*b.y;
    return result;
}

float LengthSq(struct v2 a)
{
    float result = InnerProduct(a, a);
    return result;
}

#endif