diff --git a/src/joystick/hidapi/SDL_hidapi_switch.c b/src/joystick/hidapi/SDL_hidapi_switch.c index 96d9c7823f..5b0b5bfa95 100644 --- a/src/joystick/hidapi/SDL_hidapi_switch.c +++ b/src/joystick/hidapi/SDL_hidapi_switch.c @@ -351,6 +351,10 @@ typedef struct float fGyroScaleX; float fGyroScaleY; float fGyroScaleZ; + + Sint16 sGyroOffsetX; + Sint16 sGyroOffsetY; + Sint16 sGyroOffsetZ; } m_IMUScaleData; } SDL_DriverSwitch_Context; @@ -1129,6 +1133,11 @@ static bool LoadIMUCalibration(SDL_DriverSwitch_Context *ctx) } } + // Gyro zero-rate offset + ctx->m_IMUScaleData.sGyroOffsetX = sGyroRawX; + ctx->m_IMUScaleData.sGyroOffsetY = sGyroRawY; + ctx->m_IMUScaleData.sGyroOffsetZ = sGyroRawZ; + // Accelerometer scale ctx->m_IMUScaleData.fAccelScaleX = SWITCH_ACCEL_SCALE_MULT / ((float)sAccelSensCoeffX - (float)sAccelRawX) * SDL_STANDARD_GRAVITY; ctx->m_IMUScaleData.fAccelScaleY = SWITCH_ACCEL_SCALE_MULT / ((float)sAccelSensCoeffY - (float)sAccelRawY) * SDL_STANDARD_GRAVITY; @@ -1151,6 +1160,10 @@ static bool LoadIMUCalibration(SDL_DriverSwitch_Context *ctx) ctx->m_IMUScaleData.fGyroScaleX = gyroScale; ctx->m_IMUScaleData.fGyroScaleY = gyroScale; ctx->m_IMUScaleData.fGyroScaleZ = gyroScale; + + ctx->m_IMUScaleData.sGyroOffsetX = 0; + ctx->m_IMUScaleData.sGyroOffsetY = 0; + ctx->m_IMUScaleData.sGyroOffsetZ = 0; } return true; } @@ -2366,9 +2379,13 @@ static void SendSensorUpdate(Uint64 timestamp, SDL_Joystick *joystick, SDL_Drive * users will want consistent axis mappings across devices. */ if (type == SDL_SENSOR_GYRO || type == SDL_SENSOR_GYRO_L || type == SDL_SENSOR_GYRO_R) { - data[0] = -(ctx->m_IMUScaleData.fGyroScaleY * (float)values[1]); - data[1] = ctx->m_IMUScaleData.fGyroScaleZ * (float)values[2]; - data[2] = -(ctx->m_IMUScaleData.fGyroScaleX * (float)values[0]); + const float gyroX = (float)(values[0] - ctx->m_IMUScaleData.sGyroOffsetX); + const float gyroY = (float)(values[1] - ctx->m_IMUScaleData.sGyroOffsetY); + const float gyroZ = (float)(values[2] - ctx->m_IMUScaleData.sGyroOffsetZ); + + data[0] = -(ctx->m_IMUScaleData.fGyroScaleY * gyroY); + data[1] = ctx->m_IMUScaleData.fGyroScaleZ * gyroZ; + data[2] = -(ctx->m_IMUScaleData.fGyroScaleX * gyroX); } else { data[0] = -(ctx->m_IMUScaleData.fAccelScaleY * (float)values[1]); data[1] = ctx->m_IMUScaleData.fAccelScaleZ * (float)values[2];