Lines Matching refs:zoom
26 lat2pixel( float zoom, in lat2pixel() argument
36 pixel_y = -( (lat_m * TILESIZE * exp(zoom * M_LN2) ) / (2*M_PI)) + in lat2pixel()
37 (exp(zoom * M_LN2) * (TILESIZE/2) ); in lat2pixel()
45 lon2pixel( float zoom, in lon2pixel() argument
50 pixel_x = ( (lon * TILESIZE * exp(zoom * M_LN2) ) / (2*M_PI) ) + in lon2pixel()
51 ( exp(zoom * M_LN2) * (TILESIZE/2) ); in lon2pixel()
56 pixel2lon( float zoom, in pixel2lon() argument
61 lon = ((pixel_x - ( exp(zoom * M_LN2) * (TILESIZE/2) ) ) *2*M_PI) / in pixel2lon()
62 (TILESIZE * exp(zoom * M_LN2) ); in pixel2lon()
68 pixel2lat( float zoom, in pixel2lat() argument
73 lat_m = (-( pixel_y - ( exp(zoom * M_LN2) * (TILESIZE/2) ) ) * (2*M_PI)) / in pixel2lat()
74 (TILESIZE * exp(zoom * M_LN2)); in pixel2lat()
200 float zoom = 17.0; in get_zoom_covering() local
202 while (zoom>=2) in get_zoom_covering()
205 pixel_x1 = lon2pixel((float)zoom, lon_min); in get_zoom_covering()
206 pixel_y1 = lat2pixel((float)zoom, lat_max); in get_zoom_covering()
208 pixel_x2 = lon2pixel((float)zoom, lon_max); in get_zoom_covering()
209 pixel_y2 = lat2pixel((float)zoom, lat_min); in get_zoom_covering()
215 return zoom; in get_zoom_covering()
217 zoom--; in get_zoom_covering()
220 return zoom; in get_zoom_covering()