math::TrigLUT

Fast trigonometry using lookup table.

Uses 256-step table for 0-2pi range. Backed by a precomputed constexpr int16_t[256] sine table. Avoids std::sin/cos at runtime — suitable for embedded targets (ESP32).

Namespace: enjin2

Header: include/enjin2/core/math.hpp

Public Methods

`static int16_t sin(uint16_t angle)`

Fixed-point sine of a 256-step angle.

angleAngle in 256ths of a full turn (0-255, wraps) Sine value scaled to [-32767, 32767]

`static int16_t cos(uint16_t angle)`

Fixed-point cosine of a 256-step angle.

cos(x) = sin(x + 64) (quarter-turn phase offset)angleAngle in 256ths of a full turn (0-255, wraps) Cosine value scaled to [-32767, 32767]

`static uint16_t angleToIndex(float radians)`

Convert radians to 256-step LUT index.

radiansAngle in radians LUT index (0-255)

Private Methods

`static int16_t getSineValue(uint8_t index)`

Look up sine value for a given 8-bit table index.

indexTable index (0-255, wraps automatically) Sine value scaled to [-32767, 32767]

Public Methods​

static int16_t sin(uint16_t angle)​

static int16_t cos(uint16_t angle)​

static uint16_t angleToIndex(float radians)​

Private Methods​

static int16_t getSineValue(uint8_t index)​