Hans Goudey
47d961a4b1
The ported normal calculation from ceed37fc5c neglected to
use the tilt attribute to rotate the normals around the tangents.
This commit adds that behavior back, adding a new math header file
to avoid duplicating the rotation function for normalized axes.
Differential Revision: https://developer.blender.org/D14655
27 lines
656 B
C++
27 lines
656 B
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
/** \file
|
|
* \ingroup bli
|
|
*/
|
|
|
|
#include "BLI_math_base.h"
|
|
#include "BLI_math_rotation.hh"
|
|
#include "BLI_math_vector.h"
|
|
#include "BLI_math_vector.hh"
|
|
|
|
namespace blender::math {
|
|
|
|
float3 rotate_direction_around_axis(const float3 &direction, const float3 &axis, const float angle)
|
|
{
|
|
BLI_ASSERT_UNIT_V3(direction);
|
|
BLI_ASSERT_UNIT_V3(axis);
|
|
|
|
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
|