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made constexpr cryengine camera & fromulas

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Orange
2026-06-12 00:52:22 +03:00
parent 4a9125549f
commit 5f14510e5b
6 changed files with 195 additions and 130 deletions
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tests/engines/unit_test_cry_engine.cpp
+102 -16
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@@ -9,6 +9,98 @@
#include <ranges>
using namespace omath;
#ifdef OMATH_USE_GCEM
namespace
{
constexpr bool close_to(const float actual, const float expected, const float epsilon)
{
const float diff = actual - expected;
return (diff < 0.0f ? -diff : diff) <= epsilon;
}
constexpr bool vec_close_to(const Vector3<float>& actual, const Vector3<float>& expected, const float epsilon)
{
return close_to(actual.x, expected.x, epsilon) && close_to(actual.y, expected.y, epsilon)
&& close_to(actual.z, expected.z, epsilon);
}
} // namespace
static_assert(
[]
{
constexpr omath::cry_engine::ViewAngles angles{};
constexpr auto forward = omath::cry_engine::forward_vector(angles);
constexpr auto right = omath::cry_engine::right_vector(angles);
constexpr auto up = omath::cry_engine::up_vector(angles);
constexpr auto rotation = omath::cry_engine::rotation_matrix(angles);
return vec_close_to(forward, omath::cry_engine::k_abs_forward, 1e-5f)
&& vec_close_to(right, omath::cry_engine::k_abs_right, 1e-5f)
&& vec_close_to(up, omath::cry_engine::k_abs_up, 1e-5f) && close_to(rotation.at(0, 0), 1.0f, 1e-5f)
&& close_to(rotation.at(1, 1), 1.0f, 1e-5f) && close_to(rotation.at(2, 2), 1.0f, 1e-5f)
&& close_to(rotation.at(3, 3), 1.0f, 1e-5f);
}(),
"CryEngine basis vectors should be constexpr with gcem");
static_assert(
[]
{
constexpr auto view = omath::cry_engine::calc_view_matrix({}, {});
return close_to(view.at(0, 0), 1.0f, 1e-5f) && close_to(view.at(1, 2), 1.0f, 1e-5f)
&& close_to(view.at(2, 1), 1.0f, 1e-5f) && close_to(view.at(3, 3), 1.0f, 1e-5f);
}(),
"CryEngine view matrix should be constexpr with gcem");
static_assert(
[]
{
constexpr auto transform = mat_translation<float, MatStoreType::ROW_MAJOR>({1.0f, 2.0f, 3.0f})
* mat_scale<float, MatStoreType::ROW_MAJOR>({2.0f, 3.0f, 4.0f});
constexpr auto origin = omath::cry_engine::extract_origin(transform);
constexpr auto scale = omath::cry_engine::extract_scale(transform);
return vec_close_to(origin, {1.0f, 2.0f, 3.0f}, 1e-5f) && vec_close_to(scale, {2.0f, 3.0f, 4.0f}, 1e-5f);
}(),
"CryEngine transform extraction should be constexpr with gcem");
static_assert(
[]
{
constexpr auto projection = omath::cry_engine::calc_perspective_projection_matrix(
90.0f, 1.0f, 1.0f, 11.0f, NDCDepthRange::ZERO_TO_ONE);
return close_to(projection.at(0, 0), 1.0f, 1e-5f) && close_to(projection.at(1, 1), 1.0f, 1e-5f)
&& close_to(projection.at(2, 2), 1.1f, 1e-5f) && close_to(projection.at(2, 3), -1.1f, 1e-5f)
&& close_to(projection.at(3, 2), 1.0f, 1e-5f);
}(),
"CryEngine projection matrix should be constexpr with gcem");
static_assert(
[]
{
constexpr auto angles =
omath::cry_engine::CameraTrait::calc_look_at_angle({}, omath::cry_engine::k_abs_forward);
constexpr auto view = omath::cry_engine::CameraTrait::calc_view_matrix(angles, {});
constexpr auto projection = omath::cry_engine::CameraTrait::calc_projection_matrix(
projection::FieldOfView::from_degrees(90.0f), {1.0f, 1.0f}, 1.0f, 11.0f,
NDCDepthRange::ZERO_TO_ONE);
return close_to(angles.pitch.as_degrees(), 0.0f, 1e-5f) && close_to(angles.yaw.as_degrees(), 0.0f, 1e-5f)
&& close_to(angles.roll.as_degrees(), 0.0f, 1e-5f) && close_to(view.at(0, 0), 1.0f, 1e-5f)
&& close_to(view.at(2, 1), 1.0f, 1e-5f) && close_to(projection.at(0, 0), 1.0f, 1e-5f)
&& close_to(projection.at(1, 1), 1.0f, 1e-5f) && close_to(projection.at(2, 2), 1.1f, 1e-5f)
&& close_to(projection.at(2, 3), -1.1f, 1e-5f) && close_to(projection.at(3, 2), 1.0f, 1e-5f);
}(),
"CryEngine CameraTrait should be constexpr with gcem");
static_assert(omath::cry_engine::units_to_centimeters(100.0f) == 1.0f);
static_assert(omath::cry_engine::units_to_meters(2.0f) == 2.0f);
static_assert(omath::cry_engine::units_to_kilometers(2000.0f) == 2.0f);
static_assert(omath::cry_engine::centimeters_to_units(1.0f) == 100.0f);
static_assert(omath::cry_engine::meters_to_units(2.0f) == 2.0f);
static_assert(omath::cry_engine::kilometers_to_units(2.0f) == 2000.0f);
#endif
TEST(unit_test_cry_engine, look_at_forward)
{
const auto angles = cry_engine::CameraTrait::calc_look_at_angle({}, cry_engine::k_abs_forward);
@@ -251,11 +343,9 @@ TEST(unit_test_cry_engine, ViewAnglesAsVector3Zero)
TEST(unit_test_cry_engine, ViewAnglesAsVector3Values)
{
const omath::cry_engine::ViewAngles angles{
omath::cry_engine::PitchAngle::from_degrees(45.f),
omath::cry_engine::YawAngle::from_degrees(-90.f),
omath::cry_engine::RollAngle::from_degrees(30.f)
};
const omath::cry_engine::ViewAngles angles{omath::cry_engine::PitchAngle::from_degrees(45.f),
omath::cry_engine::YawAngle::from_degrees(-90.f),
omath::cry_engine::RollAngle::from_degrees(30.f)};
const auto vec = angles.as_vector3();
EXPECT_FLOAT_EQ(vec.x, 45.f);
@@ -266,11 +356,9 @@ TEST(unit_test_cry_engine, ViewAnglesAsVector3Values)
TEST(unit_test_cry_engine, ViewAnglesAsVector3ClampedPitch)
{
// Pitch is clamped to [-90, 90]
const omath::cry_engine::ViewAngles angles{
omath::cry_engine::PitchAngle::from_degrees(120.f),
omath::cry_engine::YawAngle::from_degrees(0.f),
omath::cry_engine::RollAngle::from_degrees(0.f)
};
const omath::cry_engine::ViewAngles angles{omath::cry_engine::PitchAngle::from_degrees(120.f),
omath::cry_engine::YawAngle::from_degrees(0.f),
omath::cry_engine::RollAngle::from_degrees(0.f)};
const auto vec = angles.as_vector3();
EXPECT_FLOAT_EQ(vec.x, 90.f);
@@ -279,12 +367,10 @@ TEST(unit_test_cry_engine, ViewAnglesAsVector3ClampedPitch)
TEST(unit_test_cry_engine, ViewAnglesAsVector3NormalizedYaw)
{
// Yaw is normalized to [-180, 180], 270 wraps to -90
const omath::cry_engine::ViewAngles angles{
omath::cry_engine::PitchAngle::from_degrees(0.f),
omath::cry_engine::YawAngle::from_degrees(270.f),
omath::cry_engine::RollAngle::from_degrees(0.f)
};
const omath::cry_engine::ViewAngles angles{omath::cry_engine::PitchAngle::from_degrees(0.f),
omath::cry_engine::YawAngle::from_degrees(270.f),
omath::cry_engine::RollAngle::from_degrees(0.f)};
const auto vec = angles.as_vector3();
EXPECT_NEAR(vec.y, -90.f, 0.01f);
}
}