static void roadmap_square_get_tiles (RoadMapArea *area, int min_scale) {
RoadMapPosition position;
RoadMapPosition corner;
RoadMapPosition origin;
int scale;
int step;
int max_scale = roadmap_tile_get_max_scale ();
corner.longitude = area->west;
corner.latitude = area->south;
if (max_scale > min_scale + 1) {
max_scale = min_scale + 1;
}
for (scale = min_scale; scale <= max_scale; scale++) {
roadmap_tile_get_origin (scale, &corner, &origin);
step = roadmap_tile_get_size (scale);
for (position.longitude = origin.longitude;
position.longitude <= area->east;
position.longitude += step) {
for (position.latitude = origin.latitude;
position.latitude <= area->north;
position.latitude += step) {
roadmap_tile_request (roadmap_tile_get_id_from_position (scale, &position), ROADMAP_TILE_STATUS_PRIORITY_NONE, 0, NULL);
}
}
}
}
void roadmap_tile_get_origin (int scale, const RoadMapPosition *position, RoadMapPosition *origin) {
int tile_size = roadmap_tile_get_size (scale);
origin->longitude = (position->longitude + 180000000) / tile_size * tile_size - 180000000;
origin->latitude = (position->latitude + 90000000) / tile_size * tile_size - 90000000;
}
void roadmap_square_request_location (const RoadMapPosition *position) {
static int last_requested[5] = {-1, -1, -1, -1, -1};
int tile_size;
int square;
RoadMapPosition neighbour;
if (RoadMapSquareActive == NULL) return;
square = roadmap_square_location (position, 0);
tile_size = roadmap_tile_get_size (0);
if (square != last_requested[0]) {
roadmap_square_request (square, ROADMAP_TILE_STATUS_PRIORITY_GPS, 0); // original position
last_requested[0] = square;
}
neighbour = *position;
neighbour.longitude += tile_size / 4;
neighbour.latitude += tile_size / 4;
square = roadmap_square_location (&neighbour, 0);
if (square != last_requested[1]) {
roadmap_square_request (square, ROADMAP_TILE_STATUS_PRIORITY_NEIGHBOURS, 0); // north-east
last_requested[1] = square;
}
neighbour.longitude -= tile_size / 2;
square = roadmap_square_location (&neighbour, 0);
if (square != last_requested[2]) {
roadmap_square_request (square, ROADMAP_TILE_STATUS_PRIORITY_NEIGHBOURS, 0); // north-west
last_requested[2] = square;
}
neighbour.latitude -= tile_size / 2;
square = roadmap_square_location (&neighbour, 0);
if (square != last_requested[3]) {
roadmap_square_request (square, ROADMAP_TILE_STATUS_PRIORITY_NEIGHBOURS, 0); // south-west
last_requested[3] = square;
}
neighbour.longitude += tile_size / 2;
square = roadmap_square_location (&neighbour, 0);
if (square != last_requested[4]) {
roadmap_square_request (square, ROADMAP_TILE_STATUS_PRIORITY_NEIGHBOURS, 0); // south-east
last_requested[4] = square;
}
}
int roadmap_square_view (int *square, int size, RoadMapArea *squares_area) {
RoadMapPosition origin;
RoadMapPosition position;
RoadMapArea screen;
RoadMapArea peripheral;
int count;
int index;
int step;
int slot;
int filter_count = 0;
if (RoadMapSquareActive == NULL) return 0;
roadmap_math_screen_edges (&screen);
position.longitude = screen.west;
position.latitude = screen.south;
roadmap_tile_get_origin (RoadMapScaleCurrent, &position, &origin);
if (squares_area) {
squares_area->west = origin.longitude;
squares_area->south = origin.latitude;
}
step = roadmap_tile_get_size (RoadMapScaleCurrent);
count = 0;
peripheral.west = (screen.west * 9 - screen.east) / 8;
peripheral.east = (screen.east * 9 - screen.west) / 8;
peripheral.south = (screen.south * 9 - screen.north) / 8;
peripheral.north = (screen.north * 9 - screen.south) / 8;
for (position.longitude = origin.longitude; position.longitude < screen.east; position.longitude += step) {
for (position.latitude = origin.latitude; position.latitude <= screen.north; position.latitude += step) {
RoadMapArea edges;
RoadMapPosition topleft, topright;
RoadMapPosition bottomright, bottomleft;
RoadMapGuiPoint points[4];
int i, il, ir;
index = roadmap_tile_get_id_from_position (RoadMapScaleCurrent, &position);
// roadmap_log(ROADMAP_ERROR, "%d %d %d", position.latitude, position.longitude, RoadMapScaleCurrent);
slot = roadmap_square_find (index);
if (slot >= 0)
roadmap_square_edges (index, &edges);
else
roadmap_tile_edges(index, &edges.west, &edges.east, &edges.south, &edges.north);
topleft.longitude = edges.west;
topright.longitude = edges.east;
topleft.latitude = edges.north;
topright.latitude = edges.north;
bottomleft.longitude = edges.west;
bottomright.longitude = edges.east;
bottomleft.latitude = edges.south;
bottomright.latitude = edges.south;
roadmap_math_coordinate (&topleft, points);
roadmap_math_coordinate (&bottomright, points+1);
roadmap_math_coordinate (&topright, points+2);
roadmap_math_coordinate (&bottomleft, points+3);
for (i=0; i< 4; ++i) {
roadmap_math_rotate_project_coordinate(points+i);
}
if ((abs(points[0].x - points[1].x) < 30 &&
abs(points[0].y - points[1].y) < 30)) {
filter_count++;
continue;
}
for (il=0; il< 4; ++il) {
if (points[il].x>= 0)
break;
}
if (il==4) {
filter_count++;
continue;
}
for (ir=0; ir< 4; ++ir) {
if (points[ir].x<= roadmap_canvas_width())
break;
}
if (ir==4) {
filter_count++;
continue;
}
if (slot < 0) {
roadmap_tile_request (index, ROADMAP_TILE_STATUS_PRIORITY_ON_SCREEN, 0, NULL);
if (roadmap_square_set_current (index)) {
slot = roadmap_square_find (index);
}
}
if (slot >= 0) {
if (RoadMapSquareForceUpdateMode ||
((*roadmap_tile_status_get (index)) & ROADMAP_TILE_STATUS_FLAG_ROUTE)) {
// force new version of route tiles when on screen
roadmap_tile_request (index, ROADMAP_TILE_STATUS_PRIORITY_ON_SCREEN, 1, NULL);
}
if (count < size) {
square[count] = index;
}
count += 1;
if (size > 0 && count > size) {
roadmap_log (ROADMAP_ERROR,
"too many square are visible: %d is not enough",
size);
}
}
}
}
if (squares_area) {
squares_area->east = position.longitude;
squares_area->north = position.latitude;
}
#ifndef J2ME
roadmap_square_get_tiles (&peripheral, RoadMapScaleCurrent);
#endif
RoadMapSquareForceUpdateMode = 0;
//printf("count: %d filter: %d \n", count, filter_count);
return count;
}
int roadmap_square_find_neighbours (const RoadMapPosition *position, int scale_index, int squares[9]) {
int count = 0;
RoadMapPosition cross;
int square;
int step;
RoadMapPosition origin;
if (scale_index < 0) {
scale_index = RoadMapScaleCurrent;
}
step = roadmap_tile_get_size (scale_index);
roadmap_tile_get_origin (RoadMapScaleCurrent, position, &origin);
// check same square
square = roadmap_square_search (&origin, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
// check square to the south
cross.longitude = position->longitude;
cross.latitude = origin.latitude;
if (roadmap_math_point_is_visible (&cross)) {
cross.longitude = origin.longitude;
cross.latitude = origin.latitude - step;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the north
cross.longitude = position->longitude;
cross.latitude = origin.latitude + step;
if (roadmap_math_point_is_visible (&cross)) {
cross.longitude = origin.longitude;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the east
cross.longitude = origin.longitude;
cross.latitude = position->latitude;
if (roadmap_math_point_is_visible (&cross)) {
cross.longitude = origin.longitude - step;
cross.latitude = origin.latitude;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the west
cross.longitude = origin.longitude + step;
cross.latitude = position->latitude;
if (roadmap_math_point_is_visible (&cross)) {
cross.latitude = origin.latitude;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the south-east
cross.longitude = origin.longitude;
cross.latitude = origin.latitude;
if (roadmap_math_point_is_visible (&cross)) {
cross.longitude = origin.longitude - step;
cross.latitude = origin.latitude - step;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the south-west
cross.longitude = origin.longitude + step;
cross.latitude = origin.latitude;
if (roadmap_math_point_is_visible (&cross)) {
cross.latitude = origin.latitude - step;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the north-east
cross.longitude = origin.longitude;
cross.latitude = origin.latitude + step;
if (roadmap_math_point_is_visible (&cross)) {
cross.longitude = origin.longitude - step;
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
// check square to the north-west
cross.longitude = origin.longitude + step;
cross.latitude = origin.latitude + step;
if (roadmap_math_point_is_visible (&cross)) {
square = roadmap_square_search (&cross, scale_index);
if (square != ROADMAP_SQUARE_GLOBAL) squares[count++] = square;
}
return count;
}