mirror of
https://gitea.wildfiregames.com/0ad/0ad
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8babfe2330
Reviewed By: elexis Tested By: Stan Differential Revision: https://code.wildfiregames.com/D2012 This was SVN commit r22404.
126 lines
3.4 KiB
C++
126 lines
3.4 KiB
C++
/* Copyright (C) 2019 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "lib/self_test.h"
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#include "graphics/Camera.h"
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#include "maths/MathUtil.h"
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#include "maths/Vector3D.h"
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#include <cmath>
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#include <vector>
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class TestCamera : public CxxTest::TestSuite
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{
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public:
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void test_frustum_perspective()
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{
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SViewPort viewPort;
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viewPort.m_X = 0;
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viewPort.m_Y = 0;
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viewPort.m_Width = 512;
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viewPort.m_Height = 512;
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CCamera camera;
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camera.SetViewPort(viewPort);
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camera.LookAlong(
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CVector3D(0.0f, 0.0f, 0.0f),
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CVector3D(0.0f, 0.0f, 1.0f),
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CVector3D(0.0f, 1.0f, 0.0f)
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);
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camera.SetPerspectiveProjection(1.0f, 101.0f, DEGTORAD(90.0f));
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camera.UpdateFrustum();
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const float sqrt2 = sqrtf(2.0f) / 2.0f;
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const std::vector<CPlane> expectedPlanes = {
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CVector4D(sqrt2, 0.0f, sqrt2, 0.0f),
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CVector4D(-sqrt2, 0.0f, sqrt2, 0.0f),
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CVector4D(0.0f, sqrt2, sqrt2, 0.0f),
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CVector4D(0.0f, -sqrt2, sqrt2, 0.0f),
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CVector4D(0.0f, 0.0f, -1.0f, 101.0f),
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CVector4D(0.0f, 0.0f, 1.0f, -1.0f),
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};
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CheckFrustumPlanes(camera.GetFrustum(), expectedPlanes);
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}
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void test_frustum_ortho()
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{
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SViewPort viewPort;
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viewPort.m_X = 0;
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viewPort.m_Y = 0;
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viewPort.m_Width = 512;
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viewPort.m_Height = 512;
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CCamera camera;
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camera.SetViewPort(viewPort);
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camera.LookAlong(
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CVector3D(0.0f, 0.0f, 0.0f),
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CVector3D(0.0f, 0.0f, 1.0f),
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CVector3D(0.0f, 1.0f, 0.0f)
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);
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CMatrix3D projection;
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projection.SetOrtho(-10.0f, 10.0f, -10.0f, 10.0f, -10.0f, 10.0f);
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camera.SetProjection(projection);
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camera.UpdateFrustum();
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const std::vector<CPlane> expectedPlanes = {
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CVector4D(1.0f, 0.0f, 0.0f, 10.0f),
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CVector4D(-1.0f, 0.0f, 0.0f, 10.0f),
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CVector4D(0.0f, 1.0f, 0.0f, 10.0f),
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CVector4D(0.0f, -1.0f, 0.0f, 10.0f),
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CVector4D(0.0f, 0.0f, 1.0f, 10.0f),
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CVector4D(0.0f, 0.0f, -1.0f, 10.0f)
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};
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CheckFrustumPlanes(camera.GetFrustum(), expectedPlanes);
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}
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// Order of planes is unknown. So use interactive checker.
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void CheckFrustumPlanes(const CFrustum& frustum, const std::vector<CPlane>& expectedPlanes)
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{
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TS_ASSERT_EQUALS(frustum.GetNumPlanes(), expectedPlanes.size());
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std::set<size_t> indices;
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for (size_t i = 0; i < expectedPlanes.size(); ++i)
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indices.insert(i);
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for (size_t i = 0; i < frustum.GetNumPlanes(); ++i)
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{
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bool found = false;
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for (size_t j : indices)
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{
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if (EqualPlanes(frustum[i], expectedPlanes[j]))
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{
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found = true;
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indices.erase(j);
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break;
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}
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}
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if (!found)
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TS_FAIL(frustum[i]);
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}
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}
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bool EqualPlanes(const CPlane& p1, const CPlane& p2) const
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{
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const float EPS = 1e-3f;
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if (std::fabs(p1.m_Dist - p2.m_Dist) >= EPS)
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return false;
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return
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std::fabs(p1.m_Norm.X - p2.m_Norm.X) < EPS &&
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std::fabs(p1.m_Norm.Y - p2.m_Norm.Y) < EPS &&
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std::fabs(p1.m_Norm.Z - p2.m_Norm.Z) < EPS;
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}
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};
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