#pragma once #include #include #include #include #ifdef __cplusplus extern "C" { #endif static inline void *zero_malloc(size_t size) { void *d = malloc(size); memset(d, 0, size); return d; } // A 2d vector of double. typedef struct { double x, y; } Vec2; inline Vec2 vec2(double x, double y) { Vec2 v = {.x = x, .y = y}; return v; } Vec2 vec2_Add(Vec2 x, Vec2 y); Vec2 vec2_Scale(Vec2 v, double scale); // A 2d box of double. typedef struct { Vec2 lefttop; Vec2 size; } Box2; // Intersection test. bool box2_Intersects(const Box2 x, const Box2 y, Box2 *out_intersection); Box2 box2_Offset(Box2 box, Vec2 offset); Box2 box2_OffsetX(Box2 box, double offsetX); Box2 box2_OffsetY(Box2 box, double offsetY); // Time duration. typedef struct { int64_t microseconds; } Duration; static inline double duration_Seconds(const Duration t) { return ((double)t.microseconds) / 1000000.0; } static inline double duration_Milliseconds(const Duration t) { return ((double)t.microseconds) / 1000.0; } // This function has a precision of at most 1ms under Windows. Sad void duration_Sleep(const Duration t); // A Time point, counted since a fixed point in the past. typedef struct { int64_t microseconds; } TimePoint; TimePoint time_Now(); Duration time_Since(TimePoint prev); Duration time_Difference(TimePoint now, TimePoint prev); Duration time_Reset(TimePoint *prev); // 1e-6 extern const double EPS; #ifdef __cplusplus } #endif