| | 1 | Here is a code snippet from Antti Roppola, there is also another example in the GMap demo application that is a little fancier (GMap demo http://www2.dmsolutions.ca/gmap/gmap75.phtml download demo: http://dl.maptools.org/dl/). |
| | 2 | {{{ |
| | 3 | /** |
| | 4 | * converts pixel units into map units |
| | 5 | * |
| | 6 | * @param int $click_x coordinate X in pixels |
| | 7 | * @param int $click_y coordinate Y in pixels |
| | 8 | * @param array $current_extent holds the current extent of the map (XMin, YMin, XMax, YMax) |
| | 9 | * @global map object |
| | 10 | * @return array [0]=> X in map units; [1]=> Y in map units |
| | 11 | */ |
| | 12 | function click2map ($click_x, $click_y, $current_extent) { |
| | 13 | global $map; |
| | 14 | |
| | 15 | $x_pct = ($click_x / $map->width); |
| | 16 | $y_pct = 1 - ($click_y / $map->height); |
| | 17 | |
| | 18 | $x_map = $current_extent[0] + ( ($current_extent[2] - $current_extent[0]) * $x_pct); |
| | 19 | $y_map = $current_extent[1] + ( ($current_extent[3] - $current_extent[1]) * $y_pct); |
| | 20 | |
| | 21 | return array($x_map, $y_map); |
| | 22 | } |
| | 23 | }}} |
