Add unit tests for triangleboundingvolume

Change-Id: I05f3450bbb037c2d8b9bf45a3d6eb66d1db846bd
Reviewed-by: Andy Nichols <andy.nichols@theqtcompany.com>

3 files changed, 236 insertions, 1 deletions

diff --git a/tests/auto/render/render.pro b/tests/auto/render/render.pro
index 2aa837edb..60a860309 100644
--- a/tests/auto/render/render.pro
+++ b/tests/auto/render/render.pro
@@ -41,5 +41,6 @@ contains(QT_CONFIG, private_tests) {
         qboundingvolumedebug \
         boundingvolumedebug \
         qdefaultmeshes \
-        trianglesextractor
+        trianglesextractor \
+        triangleboundingvolume
 }
diff --git a/tests/auto/render/triangleboundingvolume/triangleboundingvolume.pro b/tests/auto/render/triangleboundingvolume/triangleboundingvolume.pro
new file mode 100644
index 000000000..e88a997e2
--- /dev/null
+++ b/tests/auto/render/triangleboundingvolume/triangleboundingvolume.pro
@@ -0,0 +1,9 @@
+TEMPLATE = app
+
+TARGET = tst_triangleboundingvolume
+
+QT += 3dcore 3dcore-private 3drender 3drender-private testlib
+
+CONFIG += testcase
+
+SOURCES += tst_triangleboundingvolume.cpp
diff --git a/tests/auto/render/triangleboundingvolume/tst_triangleboundingvolume.cpp b/tests/auto/render/triangleboundingvolume/tst_triangleboundingvolume.cpp
new file mode 100644
index 000000000..2a35d06c5
--- /dev/null
+++ b/tests/auto/render/triangleboundingvolume/tst_triangleboundingvolume.cpp
@@ -0,0 +1,225 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <Qt3DRender/private/entity_p.h>
+#include <Qt3DRender/private/triangleboundingvolume_p.h>
+#include <Qt3DRender/qraycastingservice.h>
+#include <Qt3DCore/qray3d.h>
+#include <Qt3DCore/qcameralens.h>
+#include <Qt3DCore/qcamera.h>
+#include <Qt3DCore/qboundingvolume.h>
+
+class tst_TriangleBoundingVolume : public QObject
+{
+    Q_OBJECT
+public:
+    tst_TriangleBoundingVolume() {}
+    ~tst_TriangleBoundingVolume() {}
+
+private Q_SLOTS:
+    void checkInitialState()
+    {
+        // GIVEN
+        Qt3DRender::Render::TriangleBoundingVolume volume = Qt3DRender::Render::TriangleBoundingVolume(Qt3DCore::QNodeId(),
+                                                                                                       QVector3D(),
+                                                                                                       QVector3D(),
+                                                                                                       QVector3D());
+
+        // THEN
+        QCOMPARE(volume.id(), Qt3DCore::QNodeId());
+        QCOMPARE(volume.a(), QVector3D());
+        QCOMPARE(volume.b(), QVector3D());
+        QCOMPARE(volume.c(), QVector3D());
+        QCOMPARE(volume.type(), Qt3DCore::QBoundingVolume::Triangle);
+    }
+
+    void transformed_data()
+    {
+        QTest::addColumn<QVector3D>("a");
+        QTest::addColumn<QVector3D>("b");
+        QTest::addColumn<QVector3D>("c");
+
+        QTest::addColumn<QVector3D>("transformedA");
+        QTest::addColumn<QVector3D>("transformedB");
+        QTest::addColumn<QVector3D>("transformedC");
+
+        QTest::newRow("onFarPlane")
+                << QVector3D(-1.0, 1.0, 0.0)
+                << QVector3D(0.0, -1.0, 0.0)
+                << QVector3D(1.0, 1.0, 0.0)
+                << QVector3D(-1.0, 1.0, -40.0)
+                << QVector3D(0.0, -1.0, -40.0)
+                << QVector3D(1.0, 1.0, -40.0);
+
+        QTest::newRow("onNearPlane")
+                << QVector3D(-1.0, 1.0, 40.0)
+                << QVector3D(0.0, -1.0, 40.0)
+                << QVector3D(1.0, 1.0, 40.0)
+                << QVector3D(-1.0, 1.0, 0.0)
+                << QVector3D(0.0, -1.0, 0.0)
+                << QVector3D(1.0, 1.0, 0.0);
+
+
+    }
+
+    void transformed()
+    {
+        // GIVEN
+        QFETCH(QVector3D, a);
+        QFETCH(QVector3D, b);
+        QFETCH(QVector3D, c);
+        QFETCH(QVector3D, transformedA);
+        QFETCH(QVector3D, transformedB);
+        QFETCH(QVector3D, transformedC);
+        Qt3DRender::Render::TriangleBoundingVolume volume(Qt3DCore::QNodeId(),
+                                                          a,
+                                                          b,
+                                                          c);
+        Qt3DCore::QCamera camera;
+        camera.setProjectionType(Qt3DCore::QCameraLens::PerspectiveProjection);
+        camera.setFieldOfView(45.0f);
+        camera.setAspectRatio(800.0/600.0f);
+        camera.setNearPlane(0.1f);
+        camera.setFarPlane(1000.0f);
+        camera.setPosition(QVector3D(0.0f, 0.0f, 40.0f));
+        camera.setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
+        camera.setViewCenter(QVector3D(0.0f, 0.0f, 0.0f));
+
+        const QMatrix4x4 viewMatrix = camera.viewMatrix();
+
+        // WHEN
+        volume.transform(viewMatrix);
+
+        // THEN
+        QCOMPARE(transformedA, volume.a());
+        QCOMPARE(transformedB, volume.b());
+        QCOMPARE(transformedC, volume.c());
+    }
+
+    void intersects_data()
+    {
+        QTest::addColumn<Qt3DCore::QRay3D>("ray");
+        QTest::addColumn<QVector3D>("a");
+        QTest::addColumn<QVector3D>("b");
+        QTest::addColumn<QVector3D>("c");
+        QTest::addColumn<QVector3D>("uvw");
+        QTest::addColumn<float>("t");
+        QTest::addColumn<bool>("isIntersecting");
+
+        const float farPlaneDistance = 40.0;
+
+        QTest::newRow("halfway_center")
+                << Qt3DCore::QRay3D(QVector3D(), QVector3D(0.0, 0.0, 1.0), farPlaneDistance)
+                << QVector3D(3.0, 1.5, 20.0)
+                << QVector3D(0.0, -1.5, 20.0)
+                << QVector3D(-3, 1.5, 20.0)
+                << QVector3D(0.25, 0.5, 0.25)
+                << 0.5f
+                << true;
+        QTest::newRow("miss_halfway_center_too_short")
+                << Qt3DCore::QRay3D(QVector3D(), QVector3D(0.0, 0.0, 1.0), farPlaneDistance * 0.25f)
+                << QVector3D(3.0, 1.5, 20.0)
+                << QVector3D(0.0, -1.5, 20.0)
+                << QVector3D(-3, 1.5, 20.0)
+                << QVector3D()
+                << 0.0f
+                << false;
+        QTest::newRow("far_center")
+                << Qt3DCore::QRay3D(QVector3D(), QVector3D(0.0, 0.0, 1.0), farPlaneDistance)
+                << QVector3D(3.0, 1.5, 40.0)
+                << QVector3D(0.0, -1.5, 40.0)
+                << QVector3D(-3, 1.5, 40.0)
+                << QVector3D(0.25, 0.5, 0.25)
+                << 1.0f
+                << true;
+        QTest::newRow("near_center")
+                << Qt3DCore::QRay3D(QVector3D(), QVector3D(0.0, 0.0, 1.0), 1.0f)
+                << QVector3D(3.0, 1.5, 0.0)
+                << QVector3D(0.0, -1.5, 0.0)
+                << QVector3D(-3, 1.5, 0.0)
+                << QVector3D(0.25, 0.5, 0.25)
+                << 0.0f
+                << true;
+        QTest::newRow("above_miss_center")
+                << Qt3DCore::QRay3D(QVector3D(0.0, 2.0, 0.0), QVector3D(0.0, 2.0, 1.0), 1.0f)
+                << QVector3D(3.0, 1.5, 0.0)
+                << QVector3D(0.0, -1.5, 0.0)
+                << QVector3D(-3, 1.5, 0.0)
+                << QVector3D()
+                << 0.0f
+                << false;
+        QTest::newRow("below_miss_center")
+                << Qt3DCore::QRay3D(QVector3D(0.0, -2.0, 0.0), QVector3D(0.0, -2.0, 1.0), 1.0f)
+                << QVector3D(3.0, 1.5, 0.0)
+                << QVector3D(0.0, -1.5, 0.0)
+                << QVector3D(-3, 1.5, 0.0)
+                << QVector3D()
+                << 0.0f
+                << false;
+    }
+
+    void intersects()
+    {
+        // GIVEN
+        QFETCH(Qt3DCore::QRay3D, ray);
+        QFETCH(QVector3D, a);
+        QFETCH(QVector3D, b);
+        QFETCH(QVector3D, c);
+        QFETCH(QVector3D, uvw);
+        QFETCH(float, t);
+        QFETCH(bool, isIntersecting);
+
+        // WHEN
+        QVector3D tmp_uvw;
+        float tmp_t;
+        const bool shouldBeIntersecting = Qt3DRender::Render::intersectsSegmentTriangle(ray,
+                                                                                        a, b, c,
+                                                                                        tmp_uvw,
+                                                                                        tmp_t);
+
+        // THEN
+        QCOMPARE(shouldBeIntersecting, isIntersecting);
+        if (isIntersecting) {
+            QVERIFY(qFuzzyCompare(uvw, tmp_uvw));
+            QVERIFY(qFuzzyCompare(t, tmp_t));
+        }
+    }
+};
+
+QTEST_APPLESS_MAIN(tst_TriangleBoundingVolume)
+
+#include "tst_triangleboundingvolume.moc"