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Fixes Unreal Engine view angle matrix order

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The view angle rotation matrix order in Unreal Engine was incorrect, leading to incorrect camera orientation.

This commit fixes the order of rotation matrices to roll, pitch, yaw
to correctly implement Unreal Engine camera rotations.

Adds comprehensive unit tests for Unreal Engine formulas, camera and constants.

Marks Unreal Engine as supported in README.md.
This commit is contained in:
Orange
2025-08-25 21:42:58 +03:00
parent 0de6b4589f
commit c90497f77b
5 changed files with 111 additions and 11 deletions
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105
tests/engines/unit_test_unreal_engine.cpp
View File

@@ -1,3 +1,108 @@
//
// Created by Vlad on 8/25/2025.
//
//
// Created by Orange on 11/27/2024.
//
#include <gtest/gtest.h>
#include <omath/engines/unreal_engine/camera.hpp>
#include <omath/engines/unreal_engine/constants.hpp>
#include <omath/engines/unreal_engine/formulas.hpp>
#include <print>
TEST(unit_test_unreal_engine, ForwardVector)
{
const auto forward = omath::unreal_engine::forward_vector({});
EXPECT_EQ(forward, omath::unreal_engine::k_abs_forward);
}
TEST(unit_test_unreal_engine, ForwardVectorRotationYaw)
{
omath::unreal_engine::ViewAngles angles;
angles.yaw = omath::unreal_engine::YawAngle::from_degrees(90.f);
const auto forward = omath::unreal_engine::forward_vector(angles);
EXPECT_NEAR(forward.x, omath::unreal_engine::k_abs_right.x, 0.00001f);
EXPECT_NEAR(forward.y, omath::unreal_engine::k_abs_right.y, 0.00001f);
EXPECT_NEAR(forward.z, omath::unreal_engine::k_abs_right.z, 0.00001f);
}
TEST(unit_test_unreal_engine, ForwardVectorRotationPitch)
{
omath::unreal_engine::ViewAngles angles;
angles.pitch = omath::unreal_engine::PitchAngle::from_degrees(-90.f);
const auto forward = omath::unreal_engine::forward_vector(angles);
EXPECT_NEAR(forward.x, omath::unreal_engine::k_abs_up.x, 0.00001f);
EXPECT_NEAR(forward.y, omath::unreal_engine::k_abs_up.y, 0.00001f);
EXPECT_NEAR(forward.z, omath::unreal_engine::k_abs_up.z, 0.00001f);
}
TEST(unit_test_unreal_engine, ForwardVectorRotationRoll)
{
omath::unreal_engine::ViewAngles angles;
angles.roll = omath::unreal_engine::RollAngle::from_degrees(-90.f);
const auto forward = omath::unreal_engine::up_vector(angles);
EXPECT_NEAR(forward.x, omath::unreal_engine::k_abs_right.x, 0.00001f);
EXPECT_NEAR(forward.y, omath::unreal_engine::k_abs_right.y, 0.00001f);
EXPECT_NEAR(forward.z, omath::unreal_engine::k_abs_right.z, 0.00001f);
}
TEST(unit_test_unreal_engine, RightVector)
{
const auto right = omath::unreal_engine::right_vector({});
EXPECT_EQ(right, omath::unreal_engine::k_abs_right);
}
TEST(unit_test_unreal_engine, UpVector)
{
const auto up = omath::unreal_engine::up_vector({});
EXPECT_EQ(up, omath::unreal_engine::k_abs_up);
}
TEST(unit_test_unreal_engine, ProjectTargetMovedFromCamera)
{
constexpr auto fov = omath::projection::FieldOfView::from_degrees(60.f);
const auto cam = omath::unreal_engine::Camera({0, 0, 0}, {}, {1280.f, 720.f}, fov, 0.01f, 1000.f);
for (float distance = 0.02f; distance < 100.f; distance += 0.01f)
{
const auto projected = cam.world_to_screen({distance, 0, 0});
EXPECT_TRUE(projected.has_value());
if (!projected.has_value())
continue;
EXPECT_NEAR(projected->x, 640, 0.00001f);
EXPECT_NEAR(projected->y, 360, 0.00001f);
}
}
TEST(unit_test_unreal_engine, CameraSetAndGetFov)
{
constexpr auto fov = omath::projection::FieldOfView::from_degrees(90.f);
auto cam = omath::unreal_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, fov, 0.01f, 1000.f);
EXPECT_EQ(cam.get_field_of_view().as_degrees(), 90.f);
cam.set_field_of_view(omath::projection::FieldOfView::from_degrees(50.f));
EXPECT_EQ(cam.get_field_of_view().as_degrees(), 50.f);
}
TEST(unit_test_unreal_engine, CameraSetAndGetOrigin)
{
auto cam = omath::unreal_engine::Camera({0, 0, 0}, {}, {1920.f, 1080.f}, {}, 0.01f, 1000.f);
EXPECT_EQ(cam.get_origin(), omath::Vector3<float>{});
cam.set_field_of_view(omath::projection::FieldOfView::from_degrees(50.f));
EXPECT_EQ(cam.get_field_of_view().as_degrees(), 50.f);
}