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Fix Camera3D::project_position() when depth=zfar

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This commit is contained in:
Florent Guiocheau 2024-10-24 11:55:49 +02:00
parent 3dbef70d17
commit 771e561cdd
2 changed files with 11 additions and 2 deletions
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7
scene/3d/camera_3d.cpp
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@ -528,9 +528,12 @@ Vector3 Camera3D::project_position(const Point2 &p_point, real_t p_z_depth) cons
}
Size2 viewport_size = get_viewport()->get_visible_rect().size;
Projection cm = _get_camera_projection(p_z_depth);
Projection cm = _get_camera_projection(_near);
Vector2 vp_he = cm.get_viewport_half_extents();
Plane z_slice(Vector3(0, 0, 1), -p_z_depth);
Vector3 res;
z_slice.intersect_3(cm.get_projection_plane(Projection::Planes::PLANE_RIGHT), cm.get_projection_plane(Projection::Planes::PLANE_TOP), &res);
Vector2 vp_he(res.x, res.y);
Vector2 point;
point.x = (p_point.x / viewport_size.x) * 2.0 - 1.0;

6
tests/scene/test_camera_3d.h
View file

@ -231,10 +231,13 @@ TEST_CASE("[SceneTree][Camera3D] Project/Unproject position") {
test_camera->set_orthogonal(5.0f, 0.5f, 1000.0f);
// Center.
CHECK(test_camera->project_position(Vector2(200, 100), 0.5f).is_equal_approx(Vector3(0, 0, -0.5f)));
CHECK(test_camera->project_position(Vector2(200, 100), test_camera->get_far()).is_equal_approx(Vector3(0, 0, -test_camera->get_far())));
// Top left.
CHECK(test_camera->project_position(Vector2(0, 0), 1.5f).is_equal_approx(Vector3(-5.0f, 2.5f, -1.5f)));
CHECK(test_camera->project_position(Vector2(0, 0), test_camera->get_near()).is_equal_approx(Vector3(-5.0f, 2.5f, -test_camera->get_near())));
// Bottom right.
CHECK(test_camera->project_position(Vector2(400, 200), 5.0f).is_equal_approx(Vector3(5.0f, -2.5f, -5.0f)));
CHECK(test_camera->project_position(Vector2(400, 200), test_camera->get_far()).is_equal_approx(Vector3(5.0f, -2.5f, -test_camera->get_far())));
}
SUBCASE("Perspective projection") {
@ -242,12 +245,15 @@ TEST_CASE("[SceneTree][Camera3D] Project/Unproject position") {
// Center.
CHECK(test_camera->project_position(Vector2(200, 100), 0.5f).is_equal_approx(Vector3(0, 0, -0.5f)));
CHECK(test_camera->project_position(Vector2(200, 100), 100.0f).is_equal_approx(Vector3(0, 0, -100.0f)));
CHECK(test_camera->project_position(Vector2(200, 100), test_camera->get_far()).is_equal_approx(Vector3(0, 0, -1.0f) * test_camera->get_far()));
// 3/4th way to Top left.
CHECK(test_camera->project_position(Vector2(100, 50), 0.5f).is_equal_approx(Vector3(-SQRT3 * 0.5f, SQRT3 * 0.25f, -0.5f)));
CHECK(test_camera->project_position(Vector2(100, 50), 1.0f).is_equal_approx(Vector3(-SQRT3, SQRT3 * 0.5f, -1.0f)));
CHECK(test_camera->project_position(Vector2(100, 50), test_camera->get_near()).is_equal_approx(Vector3(-SQRT3, SQRT3 * 0.5f, -1.0f) * test_camera->get_near()));
// 3/4th way to Bottom right.
CHECK(test_camera->project_position(Vector2(300, 150), 0.5f).is_equal_approx(Vector3(SQRT3 * 0.5f, -SQRT3 * 0.25f, -0.5f)));
CHECK(test_camera->project_position(Vector2(300, 150), 1.0f).is_equal_approx(Vector3(SQRT3, -SQRT3 * 0.5f, -1.0f)));
CHECK(test_camera->project_position(Vector2(300, 150), test_camera->get_far()).is_equal_approx(Vector3(SQRT3, -SQRT3 * 0.5f, -1.0f) * test_camera->get_far()));
}
}