I have a "base" reference rect (red)
Inside a rotated div (#map), I need a clone rect (yellow), it has to be same size and position of "base" rect, independent of its parent (#map) rotation.
This is where I am so far, any help would be welcoming.
http://codepen.io/christianpugliese/pen/oXKOda
var controls = { degrees: 0, rectX:125, rectY:55 };
var wBounds = document.getElementById("wrapper").getBoundingClientRect(),
mapBounds = document.getElementById("map").getBoundingClientRect(),
rectBounds = document.getElementById("rect").getBoundingClientRect();
var _x = ((mapBounds.width - wBounds.width) / 2) + $('#rect').position().left,
_y = ((mapBounds.height - wBounds.height) / 2) + $('#rect').position().top;
$('#rect').css({top: controls.rectY+'px', left:controls.rectX+'px'});
$('#mapRect').width(rectBounds.width);
$('#mapRect').height(rectBounds.height);
$('#mapRect').css({top: _y+'px',
left:_x+'px',
'transform': 'rotate('+ Math.round(-controls.degrees) +'deg)'});
$('#map').css('transform', 'rotate('+ Math.round(controls.degrees) +'deg)');
Since you're rotating the #mapRect
an equal amount in the opposite direction you're getting rotation/orientation right but not the origin. The transform-origin
would be the center of the #mapBounds
, but relative to the #rect
;
Fork of your pen: http://codepen.io/MisterCurtis/pen/vNBYZJ?editors=101
Since there is some rounding/subpixel positioning happening the yellow rect doesn't align pixel perfect.
function updateUI(){
var _x = ((mapBounds.width - wBounds.width) / 2) + $('#rect').position().left,
_y = ((mapBounds.height - wBounds.height) / 2) + $('#rect').position().top,
_ox = mapBounds.width/2 - _x, // origin x
_oy = mapBounds.height/2 - _y; // origin y
...
$('#mapRect').css({
'transform-origin': _ox + 'px ' + _oy + 'px', // now it rotates by the bounds
top: _y + 'px',
left: _x + 'px',
'transform': 'rotate(' + Math.round(-controls.degrees) + 'deg)'
});
}
Edit: Updated the pen . You'll have to ditch using Rectangle and instead use Polygon. This way you can use a plugin like https://github.com/ahmadnassri/google-maps-polygon-rotate to perform the rotation along the map center.
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