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#pragma once
#include <mbgl/geometry/anchor.hpp>
#include <mbgl/text/shaping.hpp>
#include <mbgl/tile/geometry_tile_data.hpp>
#include <mbgl/geometry/feature_index.hpp>
#include <vector>
namespace mbgl {
class CollisionBox {
public:
CollisionBox(Point<float> _anchor, Point<float> _offset, float _x1, float _y1, float _x2, float _y2, float _signedDistanceFromAnchor = 0, float _radius = 0) :
anchor(std::move(_anchor)), offset(_offset), x1(_x1), y1(_y1), x2(_x2), y2(_y2), used(true), signedDistanceFromAnchor(_signedDistanceFromAnchor), radius(_radius) {}
// the box is centered around the anchor point
Point<float> anchor;
// the offset of the box from the label's anchor point
Point<float> offset;
// distances to the edges from the anchor
float x1;
float y1;
float x2;
float y2;
// Projected box geometry: generated/updated at placement time
float px1;
float py1;
float px2;
float py2;
// Projected circle geometry: generated/updated at placement time
float px;
float py;
bool used;
float signedDistanceFromAnchor;
float radius;
};
class CollisionFeature {
public:
// for text
CollisionFeature(const GeometryCoordinates& line,
const Anchor& anchor,
const Shaping& shapedText,
const float boxScale,
const float padding,
const style::SymbolPlacementType placement,
const IndexedSubfeature& indexedFeature_,
const float overscaling)
: CollisionFeature(line, anchor, shapedText.top, shapedText.bottom, shapedText.left, shapedText.right, boxScale, padding, placement, indexedFeature_, overscaling) {}
// for icons
// Icons collision features are always SymbolPlacementType::Point, which means the collision feature
// will be viewport-rotation-aligned even if the icon is map-rotation-aligned (e.g. `icon-rotation-alignment: map`
// _or_ `symbol-placement: line`). We're relying on most icons being "close enough" to square that having
// incorrect rotation alignment doesn't throw off collision detection too much.
// See: https://github.com/mapbox/mapbox-gl-js/issues/4861
CollisionFeature(const GeometryCoordinates& line,
const Anchor& anchor,
optional<PositionedIcon> shapedIcon,
const float boxScale,
const float padding,
const IndexedSubfeature& indexedFeature_)
: CollisionFeature(line, anchor,
(shapedIcon ? shapedIcon->top() : 0),
(shapedIcon ? shapedIcon->bottom() : 0),
(shapedIcon ? shapedIcon->left() : 0),
(shapedIcon ? shapedIcon->right() : 0),
boxScale,
padding,
style::SymbolPlacementType::Point,
indexedFeature_, 1) {}
CollisionFeature(const GeometryCoordinates& line,
const Anchor&,
const float top,
const float bottom,
const float left,
const float right,
const float boxScale,
const float padding,
const style::SymbolPlacementType,
IndexedSubfeature,
const float overscaling);
std::vector<CollisionBox> boxes;
IndexedSubfeature indexedFeature;
bool alongLine;
private:
void bboxifyLabel(const GeometryCoordinates& line, GeometryCoordinate& anchorPoint,
const int segment, const float length, const float height, const float overscaling);
};
} // namespace mbgl
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