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Adds Camera test for frustum.

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Reviewed By: wraitii
Tested By: Stan
Differential Revision: https://code.wildfiregames.com/D1927
This was SVN commit r22319.
This commit is contained in:
vladislavbelov 2019-05-29 20:12:41 +00:00
parent 97fad1fe1d
commit ebfec91057
1 changed files with 93 additions and 0 deletions
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source/graphics/tests/test_Camera.h Normal file
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/* Copyright (C) 2019 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lib/self_test.h"
#include "graphics/Camera.h"
#include "maths/MathUtil.h"
#include "maths/Vector3D.h"
#include <vector>
class TestCamera : public CxxTest::TestSuite
{
public:
void test_frustum_perspective()
{
SViewPort viewPort;
viewPort.m_X = 0;
viewPort.m_Y = 0;
viewPort.m_Width = 512;
viewPort.m_Height = 512;
CCamera camera;
camera.SetViewPort(viewPort);
camera.LookAlong(
CVector3D(0.0f, 0.0f, 0.0f),
CVector3D(0.0f, 0.0f, 1.0f),
CVector3D(0.0f, 1.0f, 0.0f)
);
camera.SetProjection(1.0f, 101.0f, DEGTORAD(90.0f));
camera.UpdateFrustum();
const float sqrt2 = sqrtf(2.0f) / 2.0f;
const std::vector<CPlane> expectedPlanes = {
CVector4D(sqrt2, 0.0f, sqrt2, 0.0f),
CVector4D(-sqrt2, 0.0f, sqrt2, 0.0f),
CVector4D(0.0f, sqrt2, sqrt2, 0.0f),
CVector4D(0.0f, -sqrt2, sqrt2, 0.0f),
CVector4D(0.0f, 0.0f, -1.0f, 101.0f),
CVector4D(0.0f, 0.0f, 1.0f, -1.0f),
};
CheckFrustumPlanes(camera.GetFrustum(), expectedPlanes);
}
// Order of planes is unknown. So use interactive checker.
void CheckFrustumPlanes(const CFrustum& frustum, const std::vector<CPlane>& expectedPlanes)
{
TS_ASSERT_EQUALS(frustum.GetNumPlanes(), expectedPlanes.size());
std::set<size_t> indices;
for (size_t i = 0; i < expectedPlanes.size(); ++i)
indices.insert(i);
for (size_t i = 0; i < frustum.GetNumPlanes(); ++i)
{
bool found = false;
for (size_t j : indices)
{
if (EqualPlanes(frustum[i], expectedPlanes[j]))
{
found = true;
indices.erase(j);
break;
}
}
TS_ASSERT(found);
}
}
bool EqualPlanes(const CPlane& p1, const CPlane& p2) const
{
const float EPS = 1e-3f;
if (std::fabsf(p1.m_Dist - p2.m_Dist) >= EPS)
return false;
return
std::fabsf(p1.m_Norm.X - p2.m_Norm.X) < EPS &&
std::fabsf(p1.m_Norm.Y - p2.m_Norm.Y) < EPS &&
std::fabsf(p1.m_Norm.Z - p2.m_Norm.Z) < EPS;
}
};