4fc8226838
You can now change the orientation of north to be to the right, bottom, left in addition to the default of top
561 lines
18 KiB
C++
561 lines
18 KiB
C++
#include <mbgl/map/camera.hpp>
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#include <mbgl/map/transform.hpp>
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#include <mbgl/map/view.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/mat4.hpp>
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#include <mbgl/util/math.hpp>
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#include <mbgl/util/unitbezier.hpp>
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#include <mbgl/util/interpolate.hpp>
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#include <mbgl/util/tile_coordinate.hpp>
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#include <mbgl/platform/platform.hpp>
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#include <cstdio>
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#include <cmath>
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using namespace mbgl;
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/** Converts the given angle (in radians) to be numerically close to the anchor angle, allowing it to be interpolated properly without sudden jumps. */
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static double _normalizeAngle(double angle, double anchorAngle)
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{
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if (std::isnan(angle) || std::isnan(anchorAngle)) {
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return 0;
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}
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angle = util::wrap(angle, -M_PI, M_PI);
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if (angle == -M_PI) angle = M_PI;
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double diff = std::abs(angle - anchorAngle);
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if (std::abs(angle - util::M2PI - anchorAngle) < diff) {
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angle -= util::M2PI;
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}
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if (std::abs(angle + util::M2PI - anchorAngle) < diff) {
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angle += util::M2PI;
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}
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return angle;
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}
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Transform::Transform(View &view_, ConstrainMode constrainMode)
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: view(view_)
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, state(constrainMode)
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{
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}
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#pragma mark - Map View
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bool Transform::resize(const std::array<uint16_t, 2> size) {
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if (state.width != size[0] || state.height != size[1]) {
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view.notifyMapChange(MapChangeRegionWillChange);
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state.width = size[0];
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state.height = size[1];
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state.constrain(state.scale, state.x, state.y);
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view.notifyMapChange(MapChangeRegionDidChange);
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return true;
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} else {
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return false;
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}
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}
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#pragma mark - Position
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void Transform::jumpTo(const CameraOptions& options) {
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CameraOptions jumpOptions(options);
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jumpOptions.duration.reset();
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easeTo(jumpOptions);
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}
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void Transform::easeTo(const CameraOptions& options) {
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CameraOptions easeOptions(options);
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LatLng latLng = easeOptions.center ? *easeOptions.center : getLatLng();
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double zoom = easeOptions.zoom ? *easeOptions.zoom : getZoom();
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double angle = easeOptions.angle ? *easeOptions.angle : getAngle();
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if (!latLng || std::isnan(zoom) || std::isnan(angle)) {
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return;
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}
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double new_scale = std::pow(2.0, zoom);
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const double s = new_scale * util::tileSize;
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state.Bc = s / 360;
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state.Cc = s / util::M2PI;
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const double m = 1 - 1e-15;
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const double f = ::fmin(::fmax(std::sin(util::DEG2RAD * latLng.latitude), -m), m);
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double xn = -latLng.longitude * state.Bc;
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double yn = 0.5 * state.Cc * std::log((1 + f) / (1 - f));
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easeOptions.center.reset();
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easeOptions.zoom.reset();
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easeOptions.angle.reset();
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_easeTo(easeOptions, new_scale, angle, xn, yn);
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}
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void Transform::moveBy(const PrecisionPoint& point, const Duration& duration) {
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if (!point) {
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return;
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}
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_moveBy(point, duration);
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}
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void Transform::_moveBy(const PrecisionPoint& point, const Duration& duration) {
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double x = state.x + std::cos(state.angle) * point.x + std::sin( state.angle) * point.y;
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double y = state.y + std::cos(state.angle) * point.y + std::sin(-state.angle) * point.x;
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state.constrain(state.scale, x, y);
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CameraOptions options;
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options.duration = duration;
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_easeTo(options, state.scale, state.angle, x, y);
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}
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void Transform::setLatLng(const LatLng& latLng, const Duration& duration) {
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if (!latLng) {
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return;
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}
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CameraOptions options;
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options.center = latLng;
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options.duration = duration;
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easeTo(options);
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}
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void Transform::setLatLng(const LatLng& latLng, const PrecisionPoint& point, const Duration& duration) {
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if (!latLng || !point) {
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return;
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}
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auto coord = state.latLngToCoordinate(latLng);
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auto coordAtPoint = state.pointToCoordinate(point);
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auto coordCenter = state.pointToCoordinate({ state.width / 2.0f, state.height / 2.0f });
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float columnDiff = coordAtPoint.column - coord.column;
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float rowDiff = coordAtPoint.row - coord.row;
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auto newLatLng = state.coordinateToLatLng({
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coordCenter.column - columnDiff,
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coordCenter.row - rowDiff,
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coordCenter.zoom
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});
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setLatLng(newLatLng, duration);
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}
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void Transform::setLatLngZoom(const LatLng& latLng, double zoom, const Duration& duration) {
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if (!latLng || std::isnan(zoom)) {
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return;
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}
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CameraOptions options;
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options.center = latLng;
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options.zoom = zoom;
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options.duration = duration;
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easeTo(options);
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}
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#pragma mark - Zoom
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void Transform::scaleBy(double ds, const PrecisionPoint& center, const Duration& duration) {
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if (std::isnan(ds) || !center) {
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return;
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}
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// clamp scale to min/max values
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double new_scale = state.scale * ds;
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if (new_scale < state.min_scale) {
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new_scale = state.min_scale;
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} else if (new_scale > state.max_scale) {
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new_scale = state.max_scale;
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}
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_setScale(new_scale, center, duration);
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}
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void Transform::setScale(double scale, const PrecisionPoint& center, const Duration& duration) {
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if (std::isnan(scale) || !center) {
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return;
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}
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_setScale(scale, center, duration);
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}
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void Transform::setZoom(double zoom, const Duration& duration) {
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if (std::isnan(zoom)) {
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return;
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}
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_setScale(std::pow(2.0, zoom), { 0, 0 }, duration);
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}
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double Transform::getZoom() const {
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return state.getZoom();
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}
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double Transform::getScale() const {
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return state.scale;
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}
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void Transform::_setScale(double new_scale, const PrecisionPoint& center, const Duration& duration) {
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// Ensure that we don't zoom in further than the maximum allowed.
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if (new_scale < state.min_scale) {
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new_scale = state.min_scale;
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} else if (new_scale > state.max_scale) {
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new_scale = state.max_scale;
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}
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const double factor = new_scale / state.scale;
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double dx = 0;
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double dy = 0;
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if (center.x > 0 || center.y > 0) {
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auto coord = state.pointToCoordinate({ center.x, state.getHeight() - center.y }).zoomTo(state.getZoom());
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auto centerCoord = state.pointToCoordinate({ state.width / 2.0f, state.height / 2.0f }).zoomTo(state.getZoom());
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auto coordDiff = centerCoord - coord;
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dx = coordDiff.column * util::tileSize * (1.0 - factor);
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dy = coordDiff.row * util::tileSize * (1.0 - factor);
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}
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const double xn = state.x * factor - dx;
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const double yn = state.y * factor - dy;
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_setScaleXY(new_scale, xn, yn, duration);
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}
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void Transform::_setScaleXY(double new_scale, double xn, double yn,
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const Duration& duration) {
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CameraOptions options;
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options.duration = duration;
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_easeTo(options, new_scale, state.angle, xn, yn);
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}
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void Transform::_easeTo(const CameraOptions& options, double new_scale, double new_angle, double xn, double yn) {
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CameraOptions easeOptions(options);
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Update update = state.scale == new_scale ? Update::Repaint : Update::Zoom;
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double scale = new_scale;
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double x = xn;
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double y = yn;
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state.constrain(scale, x, y);
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double angle = _normalizeAngle(new_angle, state.angle);
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state.angle = _normalizeAngle(state.angle, angle);
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double pitch = easeOptions.pitch ? *easeOptions.pitch : state.pitch;
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if (!easeOptions.duration) {
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easeOptions.duration = Duration::zero();
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}
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if (!easeOptions.duration || *easeOptions.duration == Duration::zero()) {
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view.notifyMapChange(MapChangeRegionWillChange);
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state.scale = scale;
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state.x = x;
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state.y = y;
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const double s = state.scale * util::tileSize;
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state.Bc = s / 360;
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state.Cc = s / util::M2PI;
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state.angle = angle;
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state.pitch = pitch;
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if (options.transitionFinishFn) {
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options.transitionFinishFn();
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}
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view.notifyMapChange(MapChangeRegionDidChange);
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} else {
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view.notifyMapChange(MapChangeRegionWillChangeAnimated);
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const double startS = state.scale;
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const double startA = state.angle;
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const double startP = state.pitch;
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const double startX = state.x;
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const double startY = state.y;
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state.panning = true;
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state.scaling = true;
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state.rotating = true;
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startTransition(
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[=](double t) {
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util::UnitBezier ease = easeOptions.easing ? *easeOptions.easing : util::UnitBezier(0, 0, 0.25, 1);
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return ease.solve(t, 0.001);
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},
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[=](double t) {
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state.scale = util::interpolate(startS, scale, t);
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state.x = util::interpolate(startX, x, t);
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state.y = util::interpolate(startY, y, t);
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const double s = state.scale * util::tileSize;
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state.Bc = s / 360;
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state.Cc = s / util::M2PI;
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state.angle = util::wrap(util::interpolate(startA, angle, t), -M_PI, M_PI);
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state.pitch = util::interpolate(startP, pitch, t);
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// At t = 1.0, a DidChangeAnimated notification should be sent from finish().
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if (t < 1.0) {
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if (options.transitionFrameFn) {
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options.transitionFrameFn(t);
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}
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view.notifyMapChange(MapChangeRegionIsChanging);
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}
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return update;
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},
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[=] {
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state.panning = false;
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state.scaling = false;
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state.rotating = false;
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if (options.transitionFinishFn) {
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options.transitionFinishFn();
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}
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view.notifyMapChange(MapChangeRegionDidChangeAnimated);
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}, *easeOptions.duration);
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}
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}
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void Transform::flyTo(const CameraOptions &options) {
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CameraOptions flyOptions(options);
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LatLng latLng = options.center ? *options.center : getLatLng();
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LatLng startLatLng = getLatLng();
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double zoom = flyOptions.zoom ? *flyOptions.zoom : getZoom();
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double angle = flyOptions.angle ? *flyOptions.angle : getAngle();
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if (std::isnan(latLng.latitude) || std::isnan(latLng.longitude) || std::isnan(zoom)) {
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return;
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}
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double new_scale = std::pow(2.0, zoom);
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const double scaled_tile_size = new_scale * util::tileSize;
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state.Bc = scaled_tile_size / 360;
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state.Cc = scaled_tile_size / util::M2PI;
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const double m = 1 - 1e-15;
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const double f = ::fmin(::fmax(std::sin(util::DEG2RAD * latLng.latitude), -m), m);
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double xn = -latLng.longitude * state.Bc;
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double yn = 0.5 * state.Cc * std::log((1 + f) / (1 - f));
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view.notifyMapChange(MapChangeRegionWillChangeAnimated);
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const double startS = state.scale;
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const double startA = state.angle;
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state.panning = true;
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state.scaling = true;
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state.rotating = true;
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const double rho = 1.42;
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double w0 = std::max(state.width, state.height);
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double w1 = w0 / new_scale;
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double u1 = ::hypot(xn, yn);
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double rho2 = rho * rho;
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auto r = [=](double i) {
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double b = (w1 * w1 - w0 * w0 + (i ? -1 : 1) * rho2 * rho2 * u1 * u1) / (2 * (i ? w1 : w0) * rho2 * u1);
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return std::log(std::sqrt(b * b + 1) - b);
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};
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bool is_close = std::abs(u1) < 0.000001;
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if (is_close && std::abs(w0 - w1) < 0.000001) {
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return;
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}
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double r0 = r(0);
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auto w = [=](double s) {
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return (is_close ? std::exp((w1 < w0 ? -1 : 1) * rho * s)
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: (std::cosh(r0) / std::cosh(r0 + rho * s)));
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};
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auto u = [=](double s) {
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return (is_close ? 0.
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: (w0 * ((std::cosh(r0) * std::tanh(r0 + rho * s) - std::sinh(r0)) / rho2) / u1));
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};
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double S = (is_close ? (std::abs(std::log(w1 / w0)) / rho)
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: ((r(1) - r0) / rho));
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if (!flyOptions.duration) {
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flyOptions.duration = Duration::zero();
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}
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startTransition(
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[=](double t) {
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util::UnitBezier ease = flyOptions.easing ? *flyOptions.easing : util::UnitBezier(0, 0, 0.25, 1);
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return ease.solve(t, 0.001);
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},
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[=](double k) {
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double s = k * S;
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double us = u(s);
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//First calculate the desired latlng
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double desiredLat = startLatLng.latitude + (latLng.latitude - startLatLng.latitude) * us;
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double desiredLng = startLatLng.longitude + (latLng.longitude - startLatLng.longitude) * us;
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//Now calculate desired zoom
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state.scale = startS - w(s);
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//Now set values
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const double new_scaled_tile_size = state.scale * util::tileSize;
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state.Bc = new_scaled_tile_size / 360;
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state.Cc = new_scaled_tile_size / util::M2PI;
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const double f2 = ::fmin(::fmax(std::sin(util::DEG2RAD * desiredLat), -m), m);
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state.x = -desiredLng * state.Bc;
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state.y = 0.5 * state.Cc * std::log((1 + f2) / (1 - f2));
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if (angle != startA) {
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state.angle = util::wrap(util::interpolate(startA, angle, k), -M_PI, M_PI);
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}
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view.notifyMapChange(MapChangeRegionIsChanging);
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return Update::Zoom;
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},
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[=] {
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state.panning = false;
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state.scaling = false;
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state.rotating = false;
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view.notifyMapChange(MapChangeRegionDidChangeAnimated);
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}, *flyOptions.duration);
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};
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#pragma mark - Angle
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void Transform::rotateBy(const PrecisionPoint& first, const PrecisionPoint& second, const Duration& duration) {
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if (!first || !second) {
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return;
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}
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PrecisionPoint center(state.width, state.height);
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center /= 2;
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const PrecisionPoint offset = first - center;
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const double distance = std::sqrt(std::pow(2, offset.x) + std::pow(2, offset.y));
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// If the first click was too close to the center, move the center of rotation by 200 pixels
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// in the direction of the click.
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if (distance < 200) {
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const double heightOffset = -200;
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const double rotateAngle = std::atan2(offset.y, offset.x);
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center.x = first.x + std::cos(rotateAngle) * heightOffset;
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center.y = first.y + std::sin(rotateAngle) * heightOffset;
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}
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const PrecisionPoint newFirst = first - center;
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const PrecisionPoint newSecond = second - center;
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const double ang = state.angle + util::angle_between(newFirst.x, newFirst.y, newSecond.x, newSecond.y);
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_setAngle(ang, duration);
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}
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void Transform::setAngle(double new_angle, const Duration& duration) {
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if (std::isnan(new_angle)) {
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return;
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}
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_setAngle(new_angle, duration);
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}
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void Transform::setAngle(double new_angle, const PrecisionPoint& center) {
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if (std::isnan(new_angle) || !center) {
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return;
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}
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LatLng rotationCenter;
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if (center.x > 0 || center.y > 0) {
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rotationCenter = state.pointToLatLng(center);
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setLatLng(rotationCenter, Duration::zero());
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}
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_setAngle(new_angle);
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if (center.x > 0 && center.y > 0) {
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setLatLng(rotationCenter, center, Duration::zero());
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}
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}
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void Transform::_setAngle(double new_angle, const Duration& duration) {
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CameraOptions options;
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options.angle = new_angle;
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options.duration = duration;
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easeTo(options);
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}
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double Transform::getAngle() const {
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return state.angle;
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}
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#pragma mark - Pitch
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void Transform::setPitch(double pitch, const Duration& duration) {
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if (std::isnan(pitch)) {
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return;
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}
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CameraOptions options;
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options.pitch = pitch;
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options.duration = duration;
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easeTo(options);
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}
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double Transform::getPitch() const {
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return state.pitch;
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}
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#pragma mark - North Orientation
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void Transform::setNorthOrientation(NorthOrientation orientation) {
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state.orientation = orientation;
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state.constrain(state.scale, state.x, state.y);
|
|
}
|
|
|
|
NorthOrientation Transform::getNorthOrientation() const {
|
|
return state.getNorthOrientation();
|
|
}
|
|
|
|
#pragma mark - Transition
|
|
|
|
void Transform::startTransition(std::function<double(double)> easing,
|
|
std::function<Update(double)> frame,
|
|
std::function<void()> finish,
|
|
const Duration& duration) {
|
|
if (transitionFinishFn) {
|
|
transitionFinishFn();
|
|
}
|
|
|
|
transitionStart = Clock::now();
|
|
transitionDuration = duration;
|
|
|
|
transitionFrameFn = [easing, frame, this](const TimePoint now) {
|
|
float t = std::chrono::duration<float>(now - transitionStart) / transitionDuration;
|
|
if (t >= 1.0) {
|
|
Update result = frame(1.0);
|
|
transitionFinishFn();
|
|
transitionFrameFn = nullptr;
|
|
transitionFinishFn = nullptr;
|
|
return result;
|
|
} else {
|
|
return frame(easing(t));
|
|
}
|
|
};
|
|
|
|
transitionFinishFn = finish;
|
|
}
|
|
|
|
bool Transform::inTransition() const {
|
|
return transitionFrameFn != nullptr;
|
|
}
|
|
|
|
Update Transform::updateTransitions(const TimePoint& now) {
|
|
return transitionFrameFn ? transitionFrameFn(now) : Update::Nothing;
|
|
}
|
|
|
|
void Transform::cancelTransitions() {
|
|
if (transitionFinishFn) {
|
|
transitionFinishFn();
|
|
}
|
|
|
|
transitionFrameFn = nullptr;
|
|
transitionFinishFn = nullptr;
|
|
}
|
|
|
|
void Transform::setGestureInProgress(bool inProgress) {
|
|
state.gestureInProgress = inProgress;
|
|
}
|