512 lines
14 KiB
C++
512 lines
14 KiB
C++
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#include <stdio.h>
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#include <map>
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#include <set>
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#include <hash_map>
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#include "renderRules.h"
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#include "common.h"
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#include "mapObjects.h"
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/// !!! Fuly copied from MapRenderRepositories.java, should be carefully synchroinized
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bool isClockwiseWay(std::vector<int_pair>& c) ;
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bool calculateLineCoordinates(bool inside, int x, int y, bool pinside, int px, int py, int leftX, int rightX,
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int bottomY, int topY, std::vector<int_pair>& coordinates);
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void combineMultipolygonLine(std::vector<coordinates>& completedRings, std::vector<coordinates>& incompletedRings,
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coordinates& coordinates);
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void unifyIncompletedRings(std::vector<std::vector<int_pair> >& incompletedRings, std::vector<std::vector<int_pair> >& completedRings,
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int leftX, int rightX, int bottomY, int topY, long dbId, int zoom);
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void processCoastlines(std::vector<MapDataObject*>& coastLines, int leftX, int rightX, int bottomY, int topY, int zoom,
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bool showIncompleted, std::vector<MapDataObject*>& res) {
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std::vector<coordinates> completedRings;
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std::vector<coordinates > uncompletedRings;
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std::vector<MapDataObject*>::iterator val = coastLines.begin();
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res.reserve(coastLines.size());
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long long dbId = 0;
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for (; val != coastLines.end(); val++) {
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MapDataObject* o = *val;
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int len = o->points.size();
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if (len < 2) {
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continue;
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}
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dbId = o->id >> 1;
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coordinates* cs = new coordinates();
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int px = o->points.at(0).first;
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int py = o->points.at(0).second;
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int x = px;
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int y = py;
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bool pinside = leftX <= x && x <= rightX && y >= topY && y <= bottomY;
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if (pinside) {
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cs->push_back(int_pair(x, y));
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}
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for (int i = 1; i < len; i++) {
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x = o->points.at(i).first;
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y = o->points.at(i).second;
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bool inside = leftX <= x && x <= rightX && y >= topY && y <= bottomY;
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bool lineEnded = calculateLineCoordinates(inside, x, y, pinside, px, py, leftX, rightX, bottomY, topY, *cs);
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if (lineEnded) {
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combineMultipolygonLine(completedRings, uncompletedRings, *cs);
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// create new line if it goes outside
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cs = new coordinates();
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}
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px = x;
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py = y;
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pinside = inside;
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}
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combineMultipolygonLine(completedRings, uncompletedRings, *cs);
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}
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if (completedRings.size() == 0 && uncompletedRings.size() == 0) {
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return;
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}
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if (uncompletedRings.size() > 0) {
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unifyIncompletedRings(uncompletedRings, completedRings, leftX, rightX, bottomY, topY, dbId, zoom);
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}
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if (!showIncompleted && uncompletedRings.size() > 0) {
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res.clear();
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return;
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}
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bool clockwiseFound = false;
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for (int i = 0; i < completedRings.size(); i++) {
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bool clockwise = isClockwiseWay(completedRings[i]);
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clockwiseFound = clockwiseFound || clockwise;
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MapDataObject* o = new MapDataObject();
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o->points = completedRings[i];
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if (clockwise) {
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o->types.push_back(tag_value("natural", "coastline"));
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} else {
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o->types.push_back(tag_value("natural", "land"));
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}
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o->id = dbId;
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o->area = true;
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res.push_back(o);
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}
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// draw uncompleted for debug purpose
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for (int i = 0; i < uncompletedRings.size(); i++) {
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MapDataObject* o = new MapDataObject();
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o->points = uncompletedRings[i];
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o->types.push_back(tag_value("natural", "coastline_broken"));
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//res.push_back(o);
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}
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if (!clockwiseFound && uncompletedRings.size() == 0) {
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// add complete water tile
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MapDataObject* o = new MapDataObject();
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o->points.push_back(int_pair(leftX, topY));
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o->points.push_back(int_pair(rightX, topY));
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o->points.push_back(int_pair(rightX, bottomY));
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o->points.push_back(int_pair(leftX, bottomY));
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o->points.push_back(int_pair(leftX, topY));
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o->id = dbId;
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o->types.push_back(tag_value("natural", "coastline"));
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osmand_log_print(LOG_ERROR, "!!! Isolated islands !!!");
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res.push_back(o);
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}
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}
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// Copied from MapAlgorithms
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int ray_intersect_x(int prevX, int prevY, int x, int y, int middleY) {
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// prev node above line
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// x,y node below line
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if (prevY > y) {
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int tx = x;
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int ty = y;
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x = prevX;
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y = prevY;
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prevX = tx;
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prevY = ty;
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}
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if (y == middleY || prevY == middleY) {
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middleY -= 1;
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}
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if (prevY > middleY || y < middleY) {
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return INT_MIN;
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} else {
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if (y == prevY) {
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// the node on the boundary !!!
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return x;
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}
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// that tested on all cases (left/right)
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double rx = x + ((double) middleY - y) * ((double) x - prevX) / (((double) y - prevY));
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return (int) rx;
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}
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}
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// Copied from MapAlgorithms
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bool isClockwiseWay(std::vector<int_pair>& c) {
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if (c.size() == 0) {
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return true;
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}
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// calculate middle Y
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long long middleY = 0;
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for (size_t i = 0; i < c.size(); i++) {
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middleY += c.at(i).second;
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}
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middleY /= (long long) c.size();
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double clockwiseSum = 0;
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bool firstDirectionUp = false;
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int previousX = INT_MIN;
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int firstX = INT_MIN;
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int prevX = c.at(0).first;
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int prevY = c.at(0).second;
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for (size_t i = 1; i < c.size(); i++) {
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int x = c.at(i).first;
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int y = c.at(i).second;
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int rX = ray_intersect_x(prevX, prevY, x, y, (int) middleY);
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if (rX != INT_MIN) {
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bool skipSameSide = (y <= middleY) == (prevY <= middleY);
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if (skipSameSide) {
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continue;
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}
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bool directionUp = prevY >= middleY;
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if (firstX == INT_MIN) {
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firstDirectionUp = directionUp;
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firstX = rX;
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} else {
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bool clockwise = (!directionUp) == (previousX < rX);
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if (clockwise) {
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clockwiseSum += abs(previousX - rX);
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} else {
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clockwiseSum -= abs(previousX - rX);
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}
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}
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previousX = rX;
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}
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prevX = x;
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prevY = y;
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}
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if (firstX != INT_MIN) {
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bool clockwise = (!firstDirectionUp) == (previousX < firstX);
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if (clockwise) {
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clockwiseSum += abs(previousX - firstX);
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} else {
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clockwiseSum -= abs(previousX - firstX);
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}
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}
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return clockwiseSum >= 0;
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}
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void combineMultipolygonLine(std::vector<coordinates>& completedRings, std::vector<coordinates>& incompletedRings,
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coordinates& coordinates) {
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if (coordinates.size() > 0) {
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if (coordinates.at(0) == coordinates.at(coordinates.size() - 1)) {
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completedRings.push_back(coordinates);
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} else {
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bool add = true;
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for (size_t k = 0; k < incompletedRings.size();) {
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bool remove = false;
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std::vector<int_pair> i = incompletedRings.at(k);
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if (coordinates.at(0) == i.at(i.size() - 1)) {
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std::vector<int_pair>::iterator tit = coordinates.begin();
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i.insert(i.end(), ++tit, coordinates.end());
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remove = true;
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coordinates = i;
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} else if (coordinates.at(coordinates.size() - 1) == i.at(0)) {
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std::vector<int_pair>::iterator tit = i.begin();
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coordinates.insert(coordinates.end(), ++tit, i.end());
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remove = true;
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}
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if (remove) {
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std::vector<std::vector<int_pair> >::iterator ti = incompletedRings.begin();
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ti += k;
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incompletedRings.erase(ti);
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} else {
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k++;
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}
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if (coordinates.at(0) == coordinates.at(coordinates.size() - 1)) {
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completedRings.push_back(coordinates);
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add = false;
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break;
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}
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}
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if (add) {
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incompletedRings.push_back(coordinates);
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}
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}
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}
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}
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int safelyAddDelta(int number, int delta) {
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int res = number + delta;
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if (delta > 0 && res < number) {
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return INT_MAX;
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} else if (delta < 0 && res > number) {
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return INT_MIN;
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}
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return res;
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}
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void unifyIncompletedRings(std::vector<std::vector<int_pair> >& toProccess, std::vector<std::vector<int_pair> >& completedRings,
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int leftX, int rightX, int bottomY, int topY, long dbId, int zoom) {
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std::set<int> nonvisitedRings;
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std::vector<coordinates > incompletedRings(toProccess);
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toProccess.clear();
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std::vector<coordinates >::iterator ir = incompletedRings.begin();
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int j = 0;
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for (j = 0; ir != incompletedRings.end(); ir++,j++) {
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int x = ir->at(0).first;
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int y = ir->at(0).second;
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int sx = ir->at(ir->size() - 1).first;
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int sy = ir->at(ir->size() - 1).second;
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bool st = y == topY || x == rightX || y == bottomY || x == leftX;
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bool end = sy == topY || sx == rightX || sy == bottomY || sx == leftX;
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// something goes wrong
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// These exceptions are used to check logic about processing multipolygons
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// However this situation could happen because of broken multipolygons (so it should data causes app error)
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// that's why these exceptions could be replaced with return; statement.
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if (!end || !st) {
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osmand_log_print(LOG_ERROR, "Error processing multipolygon");
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toProccess.push_back(*ir);
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} else {
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nonvisitedRings.insert(j);
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}
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}
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ir = incompletedRings.begin();
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for (j = 0; ir != incompletedRings.end(); ir++, j++) {
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if (nonvisitedRings.find(j) == nonvisitedRings.end()) {
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continue;
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}
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int x = ir->at(ir->size() - 1).first;
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int y = ir->at(ir->size() - 1).second;
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// 31 - (zoom + 8)
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const int EVAL_DELTA = 6 << (23 - zoom);
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const int UNDEFINED_MIN_DIFF = -1 - EVAL_DELTA;
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while (true) {
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int st = 0; // st already checked to be one of the four
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if (y == topY) {
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st = 0;
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} else if (x == rightX) {
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st = 1;
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} else if (y == bottomY) {
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st = 2;
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} else if (x == leftX) {
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st = 3;
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}
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int nextRingIndex = -1;
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// BEGIN go clockwise around rectangle
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for (int h = st; h < st + 4; h++) {
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// BEGIN find closest nonvisited start (including current)
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int mindiff = UNDEFINED_MIN_DIFF;
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std::vector<std::vector<int_pair> >::iterator cni = incompletedRings.begin();
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int cnik = 0;
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for (;cni != incompletedRings.end(); cni++, cnik ++) {
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if (nonvisitedRings.find(cnik) == nonvisitedRings.end()) {
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continue;
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}
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int csx = cni->at(0).first;
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int csy = cni->at(0).second;
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if (h % 4 == 0) {
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// top
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if (csy == topY && csx >= safelyAddDelta(x, -EVAL_DELTA)) {
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if (mindiff == UNDEFINED_MIN_DIFF || (csx - x) <= mindiff) {
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mindiff = (csx - x);
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nextRingIndex = cnik;
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}
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}
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} else if (h % 4 == 1) {
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// right
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if (csx == rightX && csy >= safelyAddDelta(y, -EVAL_DELTA)) {
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if (mindiff == UNDEFINED_MIN_DIFF || (csy - y) <= mindiff) {
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mindiff = (csy - y);
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nextRingIndex = cnik;
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}
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}
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} else if (h % 4 == 2) {
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// bottom
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if (csy == bottomY && csx <= safelyAddDelta(x, EVAL_DELTA)) {
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if (mindiff == UNDEFINED_MIN_DIFF || (x - csx) <= mindiff) {
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mindiff = (x - csx);
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nextRingIndex = cnik;
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}
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}
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} else if (h % 4 == 3) {
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// left
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if (csx == leftX && csy <= safelyAddDelta(y, EVAL_DELTA)) {
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if (mindiff == UNDEFINED_MIN_DIFF || (y - csy) <= mindiff) {
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mindiff = (y - csy);
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nextRingIndex = cnik;
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}
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}
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}
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} // END find closest start (including current)
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// we found start point
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if (mindiff != UNDEFINED_MIN_DIFF) {
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break;
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} else {
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if (h % 4 == 0) {
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// top
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y = topY;
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x = rightX;
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} else if (h % 4 == 1) {
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// right
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y = bottomY;
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x = rightX;
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} else if (h % 4 == 2) {
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// bottom
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y = bottomY;
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x = leftX;
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} else if (h % 4 == 3) {
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y = topY;
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x = leftX;
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}
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ir->push_back(int_pair(x, y));
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}
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} // END go clockwise around rectangle
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if (nextRingIndex == -1) {
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// it is impossible (current start should always be found)
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} else if (nextRingIndex == j) {
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ir->push_back(ir->at(0));
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nonvisitedRings.erase(j);
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break;
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} else {
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std::vector<int_pair> p = incompletedRings.at(nextRingIndex);
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ir->insert(ir->end(), p.begin(), p.end());
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nonvisitedRings.erase(nextRingIndex);
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// get last point and start again going clockwise
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x = ir->at(ir->size() - 1).first;
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y = ir->at(ir->size() - 1).second;
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}
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}
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completedRings.push_back(*ir);
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}
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}
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/**
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* @return -1 if there is no instersection or x<<32 | y
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*/
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bool calculateIntersection(int x, int y, int px, int py, int leftX, int rightX, int bottomY, int topY, int_pair& b) {
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// firstly try to search if the line goes in
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if (py < topY && y >= topY) {
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int tx = (int) (px + ((double) (x - px) * (topY - py)) / (y - py));
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if (leftX <= tx && tx <= rightX) {
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b.first = tx;
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b.second = topY;
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return true;
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}
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}
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if (py > bottomY && y <= bottomY) {
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int tx = (int) (px + ((double) (x - px) * (py - bottomY)) / (py - y));
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if (leftX <= tx && tx <= rightX) {
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b.first = tx;
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b.second = bottomY;
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return true;
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}
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}
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if (px < leftX && x >= leftX) {
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int ty = (int) (py + ((double) (y - py) * (leftX - px)) / (x - px));
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if (ty >= topY && ty <= bottomY) {
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b.first = leftX;
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b.second = ty;
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return true;
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}
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}
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if (px > rightX && x <= rightX) {
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int ty = (int) (py + ((double) (y - py) * (px - rightX)) / (px - x));
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if (ty >= topY && ty <= bottomY) {
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b.first = rightX;
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b.second = ty;
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return true;
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}
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}
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// try to search if point goes out
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if (py > topY && y <= topY) {
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int tx = (int) (px + ((double) (x - px) * (topY - py)) / (y - py));
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if (leftX <= tx && tx <= rightX) {
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b.first = tx;
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b.second = topY;
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return true;
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}
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}
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if (py < bottomY && y >= bottomY) {
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int tx = (int) (px + ((double) (x - px) * (py - bottomY)) / (py - y));
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if (leftX <= tx && tx <= rightX) {
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b.first = tx;
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b.second = bottomY;
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return true;
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}
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}
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if (px > leftX && x <= leftX) {
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int ty = (int) (py + ((double) (y - py) * (leftX - px)) / (x - px));
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if (ty >= topY && ty <= bottomY) {
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b.first = leftX;
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b.second = ty;
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return true;
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}
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}
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if (px < rightX && x >= rightX) {
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int ty = (int) (py + ((double) (y - py) * (px - rightX)) / (px - x));
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if (ty >= topY && ty <= bottomY) {
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b.first = rightX;
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b.second = ty;
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return true;
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}
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}
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if (px == rightX || px == leftX || py == topY || py == bottomY) {
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b.first = px;
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b.second = py;
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// return true;
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// Is it right? to not return anything?
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}
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return false;
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}
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bool calculateLineCoordinates(bool inside, int x, int y, bool pinside, int px, int py, int leftX, int rightX,
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int bottomY, int topY, std::vector<int_pair>& coordinates) {
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bool lineEnded = false;
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int_pair b(x, y);
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if (pinside) {
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if (!inside) {
|
|
bool is = calculateIntersection(x, y, px, py, leftX, rightX, bottomY, topY, b);
|
|
if (!is) {
|
|
b.first = px;
|
|
b.second = py;
|
|
}
|
|
coordinates.push_back(b);
|
|
lineEnded = true;
|
|
} else {
|
|
coordinates.push_back(b);
|
|
}
|
|
} else {
|
|
bool is = calculateIntersection(x, y, px, py, leftX, rightX, bottomY, topY, b);
|
|
if (inside) {
|
|
// assert is != -1;
|
|
coordinates.push_back(b);
|
|
int_pair n(x, y);
|
|
coordinates.push_back(n);
|
|
} else if (is) {
|
|
coordinates.push_back(b);
|
|
calculateIntersection(x, y, b.first, b.second, leftX, rightX, bottomY, topY, b);
|
|
coordinates.push_back(b);
|
|
lineEnded = true;
|
|
}
|
|
}
|
|
|
|
return lineEnded;
|
|
}
|