diff options
Diffstat (limited to 'src/location/maps/qgeoprojection.cpp')
| -rw-r--r-- | src/location/maps/qgeoprojection.cpp | 57 |
1 files changed, 52 insertions, 5 deletions
diff --git a/src/location/maps/qgeoprojection.cpp b/src/location/maps/qgeoprojection.cpp index 07747a31..609fb934 100644 --- a/src/location/maps/qgeoprojection.cpp +++ b/src/location/maps/qgeoprojection.cpp @@ -317,6 +317,13 @@ QList<QDoubleVector2D> QGeoProjectionWebMercator::visibleRegion() const return m_visibleRegion; } +QList<QDoubleVector2D> QGeoProjectionWebMercator::projectableRegion() const +{ + if (m_visibleRegionDirty) + const_cast<QGeoProjectionWebMercator *>(this)->updateVisibleRegion(); + return m_projectableRegion; +} + QDoubleVector2D QGeoProjectionWebMercator::viewportToWrappedMapProjection(const QDoubleVector2D &itemPosition) const { double s; @@ -350,6 +357,8 @@ void QGeoProjectionWebMercator::setupCamera() int intZoomLevel = static_cast<int>(std::floor(m_cameraData.zoomLevel())); m_sideLength = (1 << intZoomLevel) * defaultTileSize; m_center = m_centerMercator * m_sideLength; + //aperture(90 / 2) = 1 + m_aperture = tan(QLocationUtils::radians(m_cameraData.fieldOfView()) * 0.5); double f = m_viewportHeight; double z = std::pow(2.0, m_cameraData.zoomLevel() - intZoomLevel) * defaultTileSize; @@ -358,15 +367,13 @@ void QGeoProjectionWebMercator::setupCamera() double z_mercator = std::pow(2.0, m_cameraData.zoomLevel()) * defaultTileSize; double altitude_mercator = f / (2.0 * z_mercator); - //aperture(90 / 2) = 1 - m_aperture = tan(QLocationUtils::radians(m_cameraData.fieldOfView()) * 0.5); // calculate eye m_eye = m_center; m_eye.setZ(altitude * defaultTileSize / m_aperture); // And in mercator space m_eyeMercator = m_centerMercator; - m_eyeMercator.setZ(altitude_mercator); + m_eyeMercator.setZ(altitude_mercator / m_aperture); m_view = m_eye - m_center; QDoubleVector3D side = QDoubleVector3D::normal(m_view, QDoubleVector3D(0.0, 1.0, 0.0)); @@ -402,7 +409,7 @@ void QGeoProjectionWebMercator::setupCamera() m_eyeMercator = mTiltMercator * m_viewMercator + m_centerMercator; } - m_view = m_eye - m_center; + m_view = m_eye - m_center; // ToDo: this should be inverted (center - eye), and the rest should follow m_viewNormalized = m_view.normalized(); m_up = QDoubleVector3D::normal(m_view, m_side); @@ -455,7 +462,7 @@ void QGeoProjectionWebMercator::setupCamera() m_transformation.scale(m_sideLength, m_sideLength, 1.0); m_centerNearPlane = m_eye + m_viewNormalized; - m_centerNearPlaneMercator = m_eyeMercator + m_viewNormalized * m_nearPlaneMercator; + m_centerNearPlaneMercator = m_eyeMercator - m_viewNormalized * m_nearPlaneMercator; // The method does not support tilting angles >= 90.0 or < 0. @@ -505,6 +512,46 @@ void QGeoProjectionWebMercator::updateVisibleRegion() m_visibleRegion.clear(); if (res.size()) m_visibleRegion = QClipperUtils::pathToQList(res[0]); // Intersection between two convex quadrilaterals should always be a single polygon + + m_projectableRegion.clear(); + if (m_cameraData.tilt() == 0) { + m_projectableRegion = mapRect; + } else { + QGeoProjectionWebMercator::Plane nearPlane(m_centerNearPlaneMercator, m_viewNormalized); + Line2D nearPlaneXYIntersection = nearPlane.planeXYIntersection(); + double squareHalfSide = qMax(5.0, nearPlaneXYIntersection.m_point.length()); + QDoubleVector2D viewDirectionProjected = -m_viewNormalized.toVector2D().normalized(); + + + QDoubleVector2D tl = nearPlaneXYIntersection.m_point + - squareHalfSide * nearPlaneXYIntersection.m_direction + + 2 * squareHalfSide * viewDirectionProjected; + QDoubleVector2D tr = nearPlaneXYIntersection.m_point + + squareHalfSide * nearPlaneXYIntersection.m_direction + + 2 * squareHalfSide * viewDirectionProjected; + QDoubleVector2D bl = nearPlaneXYIntersection.m_point + - squareHalfSide * nearPlaneXYIntersection.m_direction; + QDoubleVector2D br = nearPlaneXYIntersection.m_point + + squareHalfSide * nearPlaneXYIntersection.m_direction; + + QList<QDoubleVector2D> projectableRect; + projectableRect.push_back(bl); + projectableRect.push_back(br); + projectableRect.push_back(tr); + projectableRect.push_back(tl); + + + c2t::clip2tri clipperProjectable; + clipperProjectable.clearClipper(); + clipperProjectable.addSubjectPath(QClipperUtils::qListToPath(mapRect), true); + clipperProjectable.addClipPolygon(QClipperUtils::qListToPath(projectableRect)); + + Paths resProjectable = clipperProjectable.execute(c2t::clip2tri::Intersection); + if (resProjectable.size()) + m_projectableRegion = QClipperUtils::pathToQList(resProjectable[0]); // Intersection between two convex quadrilaterals should always be a single polygon + else + m_projectableRegion = viewportRect; + } } /* |