//----------------------------------------------------------
void ScreenItemAdd::addStraightArrowWave(int o, int /*duration*/, float density)
{
float freq = 1.0/density;
float c = SRAND;
EnemyWave straightArrow(EnemyStraight);
straightArrow.setInOut(o, o+130);
straightArrow.setXRand(0.0);
straightArrow.setPos(c, 10.0);
straightArrow.setFrequency((int)(50*freq), 0);
straightArrow.setXRand(1.6);
straightArrow.setFormation(EnemyWave::Arrow);
addWave(straightArrow);
EnemyWave omniWave(EnemyOmni);
omniWave.setFrequency((int)(15*freq), 5);
omniWave.setPos(c, 9.0);
omniWave.setXRand(2.0);
omniWave.setInOut(o+220, o+260);
addWave(omniWave);
omniWave.setXRand(3.0);
omniWave.setFrequency((int)(22*freq), 5);
omniWave.setInOut(o+440, o+600);
addWave(omniWave);
}
//----------------------------------------------------------
void ScreenItemAdd::addGnatWave(int o, int duration, float density, bool mixed)
{
float freq = 1.0/density;
float c = -FRAND*3.0;
if(mixed)
{
EnemyWave straightArrow(EnemyStraight);
straightArrow.setInOut(o+50, o+duration);
straightArrow.setXRand(0.0);
straightArrow.setPos(c, 10.0);
straightArrow.setFrequency((int)(90*freq), 20);
straightArrow.setXRand(8.0);
if(c > 0.0)
{
addWave(straightArrow);
}
else
{
EnemyWave omniArrow(EnemyOmni);
omniArrow.setInOut(o+50, o+130);
omniArrow.setPos(c, 10.0);
omniArrow.setFrequency((int)(20*freq), 0);
omniArrow.setXRand(1.1);
addWave(omniArrow);
omniArrow.setInOut(o+320, o+400);
addWave(omniArrow);
straightArrow.setInOut(o+200, o+250);
addWave(straightArrow);
}
EnemyWave gnatWave(EnemyGnat);
// gnatWave.setInOut(o, o+(17*game->gameSkill)*(1.0+FRAND*0.2));
gnatWave.setInOut(o, o+(int)((25*game->gameSkill)*(1.0+FRAND*0.2)));
gnatWave.setPos(SRAND*5.0, 10.0);
gnatWave.setFrequency((int)(3*freq), 0);
gnatWave.setXRand(3.0);
addWave(gnatWave);
}
else
{
EnemyWave gnatWave(EnemyGnat);
// gnatWave.setInOut(o, o+(17*game->gameSkill)*(1.0+FRAND*0.2));
gnatWave.setPos(-3.0+SRAND*5.0, 10.0);
gnatWave.setFrequency((int)(1*freq), 0);
gnatWave.setXRand(3.0);
gnatWave.setInOut(o, o+35);
addWave(gnatWave);
gnatWave.setPos(SRAND*5.0, 10.0);
gnatWave.setInOut(o+300, o+310);
addWave(gnatWave);
gnatWave.setFrequency((int)(30*freq), 0);
gnatWave.setInOut(o+300, o+400);
addWave(gnatWave);
}
}
void QgsArrowSymbolLayer::renderPolyline( const QPolygonF& points, QgsSymbolV2RenderContext& context )
{
Q_UNUSED( points );
if ( !context.renderContext().painter() )
{
return;
}
context.renderContext().expressionContext().appendScope( mExpressionScope.data() );
mExpressionScope->setVariable( QgsExpressionContext::EXPR_GEOMETRY_POINT_COUNT, points.size() + 1 );
mExpressionScope->setVariable( QgsExpressionContext::EXPR_GEOMETRY_POINT_NUM, 1 );
if ( isCurved() )
{
for ( int pIdx = 0; pIdx < points.size() - 1; pIdx += 2 )
{
mExpressionScope->setVariable( QgsExpressionContext::EXPR_GEOMETRY_POINT_NUM, pIdx + 1 );
_resolveDataDefined( context );
if ( points.size() - pIdx >= 3 )
{
// origin point
QPointF po( points.at( pIdx ) );
// middle point
QPointF pm( points.at( pIdx + 1 ) );
// destination point
QPointF pd( points.at( pIdx + 2 ) );
QPolygonF poly = curvedArrow( po, pm, pd, mScaledArrowStartWidth, mScaledArrowWidth, mScaledHeadSize, mComputedHeadType, mScaledOffset );
mSymbol->renderPolygon( poly, /* rings */ nullptr, context.feature(), context.renderContext() );
}
// straight arrow
else if ( points.size() - pIdx == 2 )
{
// origin point
QPointF po( points.at( pIdx ) );
// destination point
QPointF pd( points.at( pIdx + 1 ) );
QPolygonF poly = straightArrow( po, pd, mScaledArrowStartWidth, mScaledArrowWidth, mScaledHeadSize, mComputedHeadType, mScaledOffset );
mSymbol->renderPolygon( poly, /* rings */ nullptr, context.feature(), context.renderContext() );
}
}
}
else
{
// only straight arrows
for ( int pIdx = 0; pIdx < points.size() - 1; pIdx++ )
{
mExpressionScope->setVariable( QgsExpressionContext::EXPR_GEOMETRY_POINT_NUM, pIdx + 1 );
_resolveDataDefined( context );
// origin point
QPointF po( points.at( pIdx ) );
// destination point
QPointF pd( points.at( pIdx + 1 ) );
QPolygonF poly = straightArrow( po, pd, mScaledArrowStartWidth, mScaledArrowWidth, mScaledHeadSize, mComputedHeadType, mScaledOffset );
mSymbol->renderPolygon( poly, /* rings */ nullptr, context.feature(), context.renderContext() );
}
}
context.renderContext().expressionContext().popScope();
}
QPolygonF curvedArrow( QPointF po, QPointF pm, QPointF pd, qreal startWidth, qreal width, qreal headSize, QgsArrowSymbolLayer::HeadType headType, qreal offset )
{
qreal circleRadius;
QPointF circleCenter;
if ( ! pointsToCircle( po, pm, pd, circleCenter, circleRadius ) || circleRadius > 10000.0 )
{
// aligned points => draw a straight arrow
return straightArrow( po, pd, startWidth, width, headSize, headType, offset );
}
// angles of each point
qreal angle_o = clampAngle( atan2( circleCenter.y() - po.y(), po.x() - circleCenter.x() ) );
qreal angle_m = clampAngle( atan2( circleCenter.y() - pm.y(), pm.x() - circleCenter.x() ) );
qreal angle_d = clampAngle( atan2( circleCenter.y() - pd.y(), pd.x() - circleCenter.x() ) );
// arc direction : 1 = counter-clockwise, -1 = clockwise
int direction = clampAngle( angle_m - angle_o ) < clampAngle( angle_m - angle_d ) ? 1 : -1;
qreal deltaAngle = angle_d - angle_o;
if ( direction * deltaAngle < 0.0 )
deltaAngle = deltaAngle + direction * 2 * M_PI;
qreal length = euclidian_distance( po, pd );
// for close points and deltaAngle < 180, draw a straight line
if ( fabs( deltaAngle ) < M_PI && ((( headType == QgsArrowSymbolLayer::HeadSingle ) && ( length < headSize ) ) ||
(( headType == QgsArrowSymbolLayer::HeadReversed ) && ( length < headSize ) ) ||
(( headType == QgsArrowSymbolLayer::HeadDouble ) && ( length < 2*headSize ) ) ) )
{
return straightArrow( po, pd, startWidth, width, headSize, headType, offset );
}
// ajust coordinates to include offset
circleRadius += offset;
po = circlePoint( circleCenter, circleRadius, angle_o );
pm = circlePoint( circleCenter, circleRadius, angle_m );
pd = circlePoint( circleCenter, circleRadius, angle_d );
qreal headAngle = direction * atan( headSize / circleRadius );
QPainterPath path;
if ( headType == QgsArrowSymbolLayer::HeadDouble )
{
// the first head
path.moveTo( po );
path.lineTo( circlePoint( circleCenter, circleRadius + direction * headSize, angle_o + headAngle ) );
pathArcTo( path, circleCenter, circleRadius + direction * width / 2, angle_o + headAngle, angle_d - headAngle, direction );
// the second head
path.lineTo( circlePoint( circleCenter, circleRadius + direction * headSize, angle_d - headAngle ) );
path.lineTo( pd );
path.lineTo( circlePoint( circleCenter, circleRadius - direction * headSize, angle_d - headAngle ) );
pathArcTo( path, circleCenter, circleRadius - direction * width / 2, angle_d - headAngle, angle_o + headAngle, -direction );
// the end of the first head
path.lineTo( circlePoint( circleCenter, circleRadius - direction * headSize, angle_o + headAngle ) );
path.lineTo( po );
}
else if ( headType == QgsArrowSymbolLayer::HeadSingle )
{
path.moveTo( circlePoint( circleCenter, circleRadius + direction * startWidth / 2, angle_o ) );
spiralArcTo( path, circleCenter, angle_o, circleRadius + direction * startWidth / 2, angle_d - headAngle, circleRadius + direction * width / 2, direction );
// the arrow head
path.lineTo( circlePoint( circleCenter, circleRadius + direction * headSize, angle_d - headAngle ) );
path.lineTo( pd );
path.lineTo( circlePoint( circleCenter, circleRadius - direction * headSize, angle_d - headAngle ) );
spiralArcTo( path, circleCenter, angle_d - headAngle, circleRadius - direction * width / 2, angle_o, circleRadius - direction * startWidth / 2, -direction );
path.lineTo( circlePoint( circleCenter, circleRadius + direction * startWidth / 2, angle_o ) );
}
else if ( headType == QgsArrowSymbolLayer::HeadReversed )
{
path.moveTo( circlePoint( circleCenter, circleRadius + direction * width / 2, angle_o + headAngle ) );
spiralArcTo( path, circleCenter, angle_o + headAngle, circleRadius + direction * width / 2, angle_d, circleRadius + direction * startWidth / 2, direction );
path.lineTo( circlePoint( circleCenter, circleRadius - direction * startWidth / 2, angle_d ) );
spiralArcTo( path, circleCenter, angle_d, circleRadius - direction * startWidth / 2, angle_o + headAngle, circleRadius - direction * width / 2, - direction );
path.lineTo( circlePoint( circleCenter, circleRadius - direction * headSize, angle_o + headAngle ) );
path.lineTo( po );
path.lineTo( circlePoint( circleCenter, circleRadius + direction * headSize, angle_o + headAngle ) );
path.lineTo( circlePoint( circleCenter, circleRadius + direction * width / 2, angle_o + headAngle ) );
}
return path.toSubpathPolygons().at( 0 );
}