vec2.h

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#include <SDL.h>
#include <stdbool.h>
 
#ifndef VEC2_H
#define VEC2_H
 
typedef struct Vec2
{
    float x; 
    float y; 
} Vec2;
 
static const Vec2 Vec2_Zero = {0, 0};
static const Vec2 Vec2_Up = {0, -1};
static const Vec2 Vec2_Down = {0, 1};
static const Vec2 Vec2_Left = {-1, 0};
static const Vec2 Vec2_Right = {1, 0};
 
float Vec2_Magnitude(Vec2 v);
 
float Vec2_Distance(Vec2 a, Vec2 b);
 
Vec2 Vec2_Normalize(Vec2 v);
 
Vec2 Vec2_Add(Vec2 a, Vec2 b);
 
Vec2 Vec2_Increment(Vec2* a, Vec2 b);
 
Vec2 Vec2_Subtract(Vec2 a, Vec2 b);
 
Vec2 Vec2_Decrement(Vec2* a, Vec2 b);
 
Vec2 Vec2_Multiply(Vec2 v, float scalar);
 
Vec2 Vec2_Divide(Vec2 v, float scalar);
 
float Vec2_Dot(Vec2 a, Vec2 b);
 
Vec2 Vec2_Lerp(Vec2 a, Vec2 b, float t);
 
Vec2 Vec2_RotateDegrees(Vec2 v, float angle);
 
Vec2 Vec2_RotateRadians(Vec2 v, float angle);
 
Vec2 Vec2_RotateAroundRadians(Vec2 point, Vec2 center, float angle);
 
Vec2 Vec2_RotateAroundDegrees(Vec2 point, Vec2 center, float angle);
 
SDL_Rect Vec2_ToRect(Vec2 position, Vec2 size);
 
SDL_Rect Vec2_ToCenteredRect(Vec2 position, Vec2 size);
 
Vec2 Vec2_ToCenteredPosition(Vec2 position, Vec2 size);
 
void Vec2_FromRect(SDL_Rect rect, Vec2* position, Vec2* size);
 
Vec2 Vec2_Clamp(Vec2 v, Vec2 min, Vec2 max);
 
Vec2 Vec2_Max(Vec2 a, Vec2 b);
 
Vec2 Vec2_Min(Vec2 a, Vec2 b);
 
Vec2 Vec2_Abs(Vec2 v);
 
Vec2 Vec2_FromPoint(SDL_Point point);
 
SDL_Point Vec2_ToPoint(Vec2 v);
 
bool Vec2_AreEqual(Vec2 a, Vec2 b);
Vec2 Vec2_Square(float side);
SDL_Rect Vec2_ToSquareRect(Vec2 position, float side);
SDL_Rect Vec2_ToCenteredSquareRect(Vec2 position, float side);
float Vec2_AngleBetween(Vec2 a, Vec2 b);
#endif