void TestQgsTessellator::asMultiPolygon()
{
QgsPolygon polygon;
polygon.fromWkt( "POLYGON((1 1, 2 1, 3 2, 1 2, 1 1))" );
QgsPolygon polygonZ;
polygonZ.fromWkt( "POLYGONZ((1 1 1, 2 1 2, 3 2 3, 1 2 4, 1 1 1))" );
QgsTessellator t( 0, 0, false );
t.addPolygon( polygon, 0 );
QCOMPARE( t.asMultiPolygon()->asWkt(), QStringLiteral( "MultiPolygonZ (((1 2 0, 2 1 0, 3 2 0, 1 2 0)),((1 2 0, 1 1 0, 2 1 0, 1 2 0)))" ) );
QgsTessellator t2( 0, 0, false );
t2.addPolygon( polygonZ, 0 );
QCOMPARE( t2.asMultiPolygon()->asWkt(), QStringLiteral( "MultiPolygonZ (((1 2 4, 2 1 2, 3 2 3, 1 2 4)),((1 2 4, 1 1 1, 2 1 2, 1 2 4)))" ) );
}
void TestQgsTessellator::testBasic()
{
QgsPolygon polygon;
polygon.fromWkt( "POLYGON((1 1, 2 1, 3 2, 1 2, 1 1))" );
QgsPolygon polygonZ;
polygonZ.fromWkt( "POLYGONZ((1 1 0, 2 1 0, 3 2 0, 1 2 0, 1 1 0))" );
QList<TriangleCoords> tc;
tc << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 2, 1, 0 ), QVector3D( 3, 2, 0 ) );
tc << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 1, 1, 0 ), QVector3D( 2, 1, 0 ) );
QVector3D up( 0, 0, 1 ); // surface normal pointing straight up
QList<TriangleCoords> tcNormals;
tcNormals << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 2, 1, 0 ), QVector3D( 3, 2, 0 ), up, up, up );
tcNormals << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 1, 1, 0 ), QVector3D( 2, 1, 0 ), up, up, up );
// without normals
QgsTessellator t( 0, 0, false );
t.addPolygon( polygon, 0 );
QVERIFY( checkTriangleOutput( t.data(), false, tc ) );
QgsTessellator tZ( 0, 0, false );
tZ.addPolygon( polygonZ, 0 );
QVERIFY( checkTriangleOutput( tZ.data(), false, tc ) );
// with normals
QgsTessellator tN( 0, 0, true );
tN.addPolygon( polygon, 0 );
QVERIFY( checkTriangleOutput( tN.data(), true, tcNormals ) );
QgsTessellator tNZ( 0, 0, true );
tNZ.addPolygon( polygonZ, 0 );
QVERIFY( checkTriangleOutput( tNZ.data(), true, tcNormals ) );
}
void TestQgsTessellator::testBadCoordinates()
{
// triangulation would crash for me with this polygon if there is no simplification
// to remove the coordinates that are very close to each other
QgsPolygon polygon;
polygon.fromWkt( "POLYGON((1 1, 2 1, 2.0000001 1.0000001, 2.0000002 1.0000001, 2.0000001 1.0000002, 2.0000002 1.0000002, 3 2, 1 2, 1 1))" );
QList<TriangleCoords> tc;
tc << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 2, 1, 0 ), QVector3D( 3, 2, 0 ) );
tc << TriangleCoords( QVector3D( 1, 2, 0 ), QVector3D( 1, 1, 0 ), QVector3D( 2, 1, 0 ) );
QgsTessellator t( 0, 0, false );
t.addPolygon( polygon, 0 );
QVERIFY( checkTriangleOutput( t.data(), false, tc ) );
}
void TestQgsTessellator::testWalls()
{
QgsPolygon polygonZ;
polygonZ.fromWkt( "POLYGONZ((1 1 1, 2 1 2, 3 2 3, 1 2 4, 1 1 1))" );
QList<TriangleCoords> tc;
tc << TriangleCoords( QVector3D( 1, 2, 14 ), QVector3D( 2, 1, 12 ), QVector3D( 3, 2, 13 ) );
tc << TriangleCoords( QVector3D( 1, 2, 14 ), QVector3D( 1, 1, 11 ), QVector3D( 2, 1, 12 ) );
tc << TriangleCoords( QVector3D( 1, 1, 11 ), QVector3D( 1, 2, 14 ), QVector3D( 1, 1, 1 ) );
tc << TriangleCoords( QVector3D( 1, 1, 1 ), QVector3D( 1, 2, 14 ), QVector3D( 1, 2, 4 ) );
tc << TriangleCoords( QVector3D( 1, 2, 14 ), QVector3D( 3, 2, 13 ), QVector3D( 1, 2, 4 ) );
tc << TriangleCoords( QVector3D( 1, 2, 4 ), QVector3D( 3, 2, 13 ), QVector3D( 3, 2, 3 ) );
tc << TriangleCoords( QVector3D( 3, 2, 13 ), QVector3D( 2, 1, 12 ), QVector3D( 3, 2, 3 ) );
tc << TriangleCoords( QVector3D( 3, 2, 3 ), QVector3D( 2, 1, 12 ), QVector3D( 2, 1, 2 ) );
tc << TriangleCoords( QVector3D( 2, 1, 12 ), QVector3D( 1, 1, 11 ), QVector3D( 2, 1, 2 ) );
tc << TriangleCoords( QVector3D( 2, 1, 2 ), QVector3D( 1, 1, 11 ), QVector3D( 1, 1, 1 ) );
QgsTessellator tZ( 0, 0, false );
tZ.addPolygon( polygonZ, 10 );
QVERIFY( checkTriangleOutput( tZ.data(), false, tc ) );
}