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added constexpr engine traits

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Orange
2026-06-14 22:46:24 +03:00
parent 136cd39496
commit 91d9335f83
32 changed files with 879 additions and 859 deletions
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source/engines/iw_engine/formulas.cpp
-75
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@@ -2,78 +2,3 @@
// Created by Vlad on 3/19/2025.
//
#include "omath/engines/iw_engine/formulas.hpp"
namespace omath::iw_engine
{
Vector3<float> forward_vector(const ViewAngles& angles) noexcept
{
const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_forward);
return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
}
Vector3<float> right_vector(const ViewAngles& angles) noexcept
{
const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_right);
return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
}
Vector3<float> up_vector(const ViewAngles& angles) noexcept
{
const auto vec = rotation_matrix(angles) * mat_column_from_vector(k_abs_up);
return {vec.at(0, 0), vec.at(1, 0), vec.at(2, 0)};
}
Mat4X4 rotation_matrix(const ViewAngles& angles) noexcept
{
return mat_rotation_axis_z(angles.yaw) * mat_rotation_axis_y(angles.pitch) * mat_rotation_axis_x(angles.roll);
}
Vector3<float> extract_origin(const Mat4X4& mat) noexcept
{
return mat_extract_origin(mat);
}
Vector3<float> extract_scale(const Mat4X4& mat) noexcept
{
return mat_extract_scale(mat);
}
ViewAngles extract_rotation_angles(const Mat4X4& mat) noexcept
{
const auto angles = mat_extract_rotation_zyx(mat);
return {
PitchAngle::from_degrees(angles.y),
YawAngle::from_degrees(angles.z),
RollAngle::from_degrees(angles.x),
};
}
Mat4X4 calc_view_matrix(const ViewAngles& angles, const Vector3<float>& cam_origin) noexcept
{
return mat_camera_view(forward_vector(angles), right_vector(angles), up_vector(angles), cam_origin);
}
Mat4X4 calc_perspective_projection_matrix(const float field_of_view, const float aspect_ratio, const float near,
const float far, const NDCDepthRange ndc_depth_range) noexcept
{
// InfinityWard Engine (inherited from Quake) stores FOV as horizontal FOV at a 4:3
// reference aspect. Convert to true vertical FOV, then delegate to the
// standard vertical-FOV left-handed builder with the caller's actual
// aspect ratio.
// vfov = 2 · atan( tan(hfov_4:3 / 2) / (4/3) )
constexpr float k_source_reference_aspect = 4.f / 3.f;
const auto vertical_fov = angles::horizontal_fov_to_vertical(field_of_view, k_source_reference_aspect);
if (ndc_depth_range == NDCDepthRange::ZERO_TO_ONE)
return mat_perspective_left_handed_vertical_fov<
float, MatStoreType::ROW_MAJOR, NDCDepthRange::ZERO_TO_ONE>(
vertical_fov, aspect_ratio, near, far);
if (ndc_depth_range == NDCDepthRange::NEGATIVE_ONE_TO_ONE)
return mat_perspective_left_handed_vertical_fov<
float, MatStoreType::ROW_MAJOR, NDCDepthRange::NEGATIVE_ONE_TO_ONE>(
vertical_fov, aspect_ratio, near, far);
std::unreachable();
};
} // namespace omath::iw_engine