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tests: Add uv to tangent lengths test

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This commit is contained in:
Jakob Bornecrantz 2023-10-04 00:39:21 +01:00
parent 77efa57e0a
commit 6d0ab43cda
2 changed files with 113 additions and 1 deletions
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3
tests/CMakeLists.txt
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@ -37,7 +37,7 @@ if(XRT_HAVE_D3D12)
list(APPEND tests tests_comp_client_d3d12)
endif()
if(XRT_HAVE_VULKAN)
list(APPEND tests tests_comp_client_vulkan)
list(APPEND tests tests_comp_client_vulkan tests_uv_to_tangent)
endif()
if(XRT_HAVE_OPENGL
AND XRT_HAVE_OPENGL_GLX
@ -101,6 +101,7 @@ if(XRT_HAVE_VULKAN)
target_link_libraries(
tests_comp_client_vulkan PRIVATE comp_client comp_mock comp_util aux_vk
)
target_link_libraries(tests_uv_to_tangent PRIVATE comp_render)
endif()
if(_have_opengl_test)

111
tests/tests_uv_to_tangent.cpp Normal file
View file

@ -0,0 +1,111 @@
// Copyright 2023, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
* @file
* @brief Testing UV to tangent values.
* @author Jakob Bornecrantz <jakob@collabora.com>
*/
#include "catch/catch.hpp"
#include "math/m_mathinclude.h"
#include "render/render_interface.h"
#define QUARTER_PI (M_PI / 4)
#define SIXTH_PI (M_PI / 6)
#define MARGIN (0.000001)
static inline xrt_normalized_rect
rect(float x, float y, float w, float h)
{
xrt_normalized_rect rect = {x, y, w, h};
return rect;
}
static inline void
check(xrt_normalized_rect &result, xrt_normalized_rect &&truth)
{
REQUIRE_THAT(result.x, Catch::WithinAbs(truth.x, MARGIN));
REQUIRE_THAT(result.y, Catch::WithinAbs(truth.y, MARGIN));
REQUIRE_THAT(result.w, Catch::WithinAbs(truth.w, MARGIN));
REQUIRE_THAT(result.h, Catch::WithinAbs(truth.h, MARGIN));
}
#define CAPUTER_FOV(FOV) CAPTURE(FOV.angle_up, FOV.angle_down, FOV.angle_left, FOV.angle_right);
TEST_CASE("render_calc_uv_to_tangent_lengths_rect")
{
// Sanity check.
REQUIRE_THAT(tan(QUARTER_PI), Catch::WithinAbs(1.0, MARGIN));
SECTION("45_degrees")
{
struct xrt_fov f45 = XRT_STRUCT_INIT;
f45.angle_down = -QUARTER_PI;
f45.angle_up = QUARTER_PI;
f45.angle_left = -QUARTER_PI;
f45.angle_right = QUARTER_PI;
SECTION("normal")
{
CAPTURE(f45.angle_up, f45.angle_down, f45.angle_left, f45.angle_right);
struct xrt_normalized_rect result;
render_calc_uv_to_tangent_lengths_rect(&f45, &result);
/*
* We expect a fov of 45 degrees in all angles to have tangets
* of 1 or -1. In order to transform uv [0 .. 1] to [-1 .. 1]
* we need to have a width of 2 and a offset of -1.
*/
check(result, rect(-1, -1, 2, 2));
}
SECTION("flipped_vertical")
{
f45.angle_down = -f45.angle_down;
f45.angle_up = -f45.angle_up;
CAPUTER_FOV(f45);
struct xrt_normalized_rect result;
render_calc_uv_to_tangent_lengths_rect(&f45, &result);
// We expect the same values as normal but with y and h negated.
check(result, rect(-1, 1, 2, -2));
}
SECTION("flipped_horizontal")
{
f45.angle_left = -f45.angle_left;
f45.angle_right = -f45.angle_right;
CAPUTER_FOV(f45);
struct xrt_normalized_rect result;
render_calc_uv_to_tangent_lengths_rect(&f45, &result);
// We expect the same values as normal but with x and w negated.
check(result, rect(1, -1, -2, 2));
}
}
SECTION("30_degrees")
{
struct xrt_fov f30 = XRT_STRUCT_INIT;
f30.angle_down = -SIXTH_PI;
f30.angle_up = SIXTH_PI;
f30.angle_left = -SIXTH_PI;
f30.angle_right = SIXTH_PI;
CAPUTER_FOV(f30);
struct xrt_normalized_rect result;
render_calc_uv_to_tangent_lengths_rect(&f30, &result);
float t = tan(SIXTH_PI);
float t2 = t * 2;
// We expect the offset to be -tan(PI/6) and the lengths to be tan(PI/6) * 2.
check(result, rect(-t, -t, t2, t2));
}
}