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Rotate map canvas after composition

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This commit is contained in:
Andreas Hocevar
2016-02-13 21:55:09 +01:00
parent 98b823c5fc
commit a109062b1f
12 changed files with 171 additions and 79 deletions
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src/ol/extent.js
+18 -12
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@@ -575,18 +575,24 @@ ol.extent.getForViewAndSize = function(center, resolution, rotation, size, opt_e
var dy = resolution * size[1] / 2;
var cosRotation = Math.cos(rotation);
var sinRotation = Math.sin(rotation);
/** @type {Array.<number>} */
var xs = [-dx, -dx, dx, dx];
/** @type {Array.<number>} */
var ys = [-dy, dy, -dy, dy];
var i, x, y;
for (i = 0; i < 4; ++i) {
x = xs[i];
y = ys[i];
xs[i] = center[0] + x * cosRotation - y * sinRotation;
ys[i] = center[1] + x * sinRotation + y * cosRotation;
}
return ol.extent.boundingExtentXYs_(xs, ys, opt_extent);
var xCos = dx * cosRotation;
var xSin = dx * sinRotation;
var yCos = dy * cosRotation;
var ySin = dy * sinRotation;
var x = center[0];
var y = center[1];
var x0 = x - xCos + ySin;
var x1 = x - xCos - ySin;
var x2 = x + xCos - ySin;
var x3 = x + xCos + ySin;
var y0 = y - xSin - yCos;
var y1 = y - xSin + yCos;
var y2 = y + xSin + yCos;
var y3 = y + xSin - yCos;
return ol.extent.createOrUpdate(
Math.min(x0, x1, x2, x3), Math.min(y0, y1, y2, y3),
Math.max(x0, x1, x2, x3), Math.max(y0, y1, y2, y3),
opt_extent);
};