Differential D14655 Diff 50460 source/blender/blenlib/BLI_math_rotation.hh

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				/* SPDX-License-Identifier: GPL-2.0-or-later */

				#pragma once

				/** \file
				* \ingroup bli
				*/

				#include "BLI_math_base.h"
				#include "BLI_math_vector.hh"

				namespace blender::math {

				static float3 rotate_direction_around_axis(const float3 &direction,
				JacquesLuckeUnsubmitted Not Done Inline Actions In a header that should be `inline`. Although this function looks like it doesn't have to be inlined. JacquesLucke: In a header that should be `inline`. Although this function looks like it doesn't have to be…
				const float3 &axis,
				const float angle)
				{
				BLI_assert(math::distance(math::length_squared(direction), 1.0f) < BLI_ASSERT_UNIT_EPSILON);
				BLI_assert(math::distance(math::length_squared(axis), 1.0f) < BLI_ASSERT_UNIT_EPSILON);

				const float3 axis_scaled = axis * math::dot(direction, axis);
				const float3 diff = direction - axis_scaled;
				const float3 cross = math::cross(axis, diff);

				return axis_scaled + diff * std::cos(angle) + cross * std::sin(angle);
				}

				} // namespace blender::math