Skip to main content

math

Fast integer math utilities namespace.

Namespace: enjin2::math

Header: include/enjin2/core/math.hpp

Functions​

uint16_t isqrt(uint32_t n)​

Integer square root via Newton's method.

nValue to take the square root of Floored integer square root

constexpr constexpr T abs(T value)​

Absolute value.

valueInput value Non-negative absolute value

constexpr constexpr T clamp(T value, T min_val, T max_val)​

Clamp value to [min_val, max_val].

valueValue to clamp min_valLower bound max_valUpper bound Clamped value

constexpr constexpr T lerp(T a, T b, float t)​

Linear interpolation between a and b.

aStart value bEnd value tInterpolation factor (0.0 = a, 1.0 = b) Interpolated value

constexpr constexpr T map(T value, T in_min, T in_max, T out_min, T out_max)​

Re-map a value from one range to another.

valueInput value in_minInput range lower bound in_maxInput range upper bound out_minOutput range lower bound out_maxOutput range upper bound Value mapped to output range

constexpr constexpr T sign(T value)​

Returns -1, 0, or 1 depending on the sign of value.

valueInput value Sign of the value

float smoothstep(float edge0, float edge1, float x)​

Hermite smoothstep (clamped, order-3)

edge0Lower edge edge1Upper edge xInput value Smooth interpolation result in [0, 1]

uint16_t distance(int16_t x1, int16_t y1, int16_t x2, int16_t y2)​

Integer Euclidean distance between two points.

x1First point X y1First point Y x2Second point X y2Second point Y Distance (integer square root)