How to use transform method in localstack

Best Python code snippet using localstack_python

geo.py

Source:geo.py Github

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...57 Axes.set_xlim(self, -np.pi, np.pi)58 Axes.set_ylim(self, -np.pi /​ 2.0, np.pi /​ 2.0)59 def _set_lim_and_transforms(self):60 # A (possibly non-linear) projection on the (already scaled) data61 self.transProjection = self._get_core_transform(self.RESOLUTION)62 self.transAffine = self._get_affine_transform()63 self.transAxes = BboxTransformTo(self.bbox)64 # The complete data transformation stack -- from data all the65 # way to display coordinates66 self.transData = \67 self.transProjection + \68 self.transAffine + \69 self.transAxes70 # This is the transform for longitude ticks.71 self._xaxis_pretransform = \72 Affine2D() \73 .scale(1.0, self._longitude_cap * 2.0) \74 .translate(0.0, -self._longitude_cap)75 self._xaxis_transform = \76 self._xaxis_pretransform + \77 self.transData78 self._xaxis_text1_transform = \79 Affine2D().scale(1.0, 0.0) + \80 self.transData + \81 Affine2D().translate(0.0, 4.0)82 self._xaxis_text2_transform = \83 Affine2D().scale(1.0, 0.0) + \84 self.transData + \85 Affine2D().translate(0.0, -4.0)86 # This is the transform for latitude ticks.87 yaxis_stretch = Affine2D().scale(np.pi * 2.0, 1.0).translate(-np.pi, 0.0)88 yaxis_space = Affine2D().scale(1.0, 1.1)89 self._yaxis_transform = \90 yaxis_stretch + \91 self.transData92 yaxis_text_base = \93 yaxis_stretch + \94 self.transProjection + \95 (yaxis_space + \96 self.transAffine + \97 self.transAxes)98 self._yaxis_text1_transform = \99 yaxis_text_base + \100 Affine2D().translate(-8.0, 0.0)101 self._yaxis_text2_transform = \102 yaxis_text_base + \103 Affine2D().translate(8.0, 0.0)104 def _get_affine_transform(self):105 transform = self._get_core_transform(1)106 xscale, _ = transform.transform_point((np.pi, 0))107 _, yscale = transform.transform_point((0, np.pi /​ 2.0))108 return Affine2D() \109 .scale(0.5 /​ xscale, 0.5 /​ yscale) \110 .translate(0.5, 0.5)111 def get_xaxis_transform(self,which='grid'):112 if which not in ['tick1','tick2','grid']:113 msg = "'which' must be on of [ 'tick1' | 'tick2' | 'grid' ]"114 raise ValueError(msg)115 return self._xaxis_transform116 def get_xaxis_text1_transform(self, pad):117 return self._xaxis_text1_transform, 'bottom', 'center'118 def get_xaxis_text2_transform(self, pad):119 return self._xaxis_text2_transform, 'top', 'center'120 def get_yaxis_transform(self,which='grid'):121 if which not in ['tick1','tick2','grid']:122 msg = "'which' must be one of [ 'tick1' | 'tick2' | 'grid' ]"123 raise ValueError(msg)124 return self._yaxis_transform125 def get_yaxis_text1_transform(self, pad):126 return self._yaxis_text1_transform, 'center', 'right'127 def get_yaxis_text2_transform(self, pad):128 return self._yaxis_text2_transform, 'center', 'left'129 def _gen_axes_patch(self):130 return Circle((0.5, 0.5), 0.5)131 def _gen_axes_spines(self):132 return {'geo':mspines.Spine.circular_spine(self,133 (0.5, 0.5), 0.5)}134 def set_yscale(self, *args, **kwargs):135 if args[0] != 'linear':136 raise NotImplementedError137 set_xscale = set_yscale138 def set_xlim(self, *args, **kwargs):139 raise TypeError("It is not possible to change axes limits "140 "for geographic projections. Please consider "141 "using Basemap or Cartopy.")142 set_ylim = set_xlim143 def format_coord(self, lon, lat):144 'return a format string formatting the coordinate'145 lon = lon * (180.0 /​ np.pi)146 lat = lat * (180.0 /​ np.pi)147 if lat >= 0.0:148 ns = 'N'149 else:150 ns = 'S'151 if lon >= 0.0:152 ew = 'E'153 else:154 ew = 'W'155 return '%f\u00b0%s, %f\u00b0%s' % (abs(lat), ns, abs(lon), ew)156 def set_longitude_grid(self, degrees):157 """158 Set the number of degrees between each longitude grid.159 """160 number = (360.0 /​ degrees) + 1161 self.xaxis.set_major_locator(162 FixedLocator(163 np.linspace(-np.pi, np.pi, number, True)[1:-1]))164 self._logitude_degrees = degrees165 self.xaxis.set_major_formatter(self.ThetaFormatter(degrees))166 def set_latitude_grid(self, degrees):167 """168 Set the number of degrees between each longitude grid.169 """170 number = (180.0 /​ degrees) + 1171 self.yaxis.set_major_locator(172 FixedLocator(173 np.linspace(-np.pi /​ 2.0, np.pi /​ 2.0, number, True)[1:-1]))174 self._latitude_degrees = degrees175 self.yaxis.set_major_formatter(self.ThetaFormatter(degrees))176 def set_longitude_grid_ends(self, degrees):177 """178 Set the latitude(s) at which to stop drawing the longitude grids.179 """180 self._longitude_cap = degrees * (np.pi /​ 180.0)181 self._xaxis_pretransform \182 .clear() \183 .scale(1.0, self._longitude_cap * 2.0) \184 .translate(0.0, -self._longitude_cap)185 def get_data_ratio(self):186 '''187 Return the aspect ratio of the data itself.188 '''189 return 1.0190 ### Interactive panning191 def can_zoom(self):192 """193 Return *True* if this axes supports the zoom box button functionality.194 This axes object does not support interactive zoom box.195 """196 return False197 def can_pan(self) :198 """199 Return *True* if this axes supports the pan/​zoom button functionality.200 This axes object does not support interactive pan/​zoom.201 """202 return False203 def start_pan(self, x, y, button):204 pass205 def end_pan(self):206 pass207 def drag_pan(self, button, key, x, y):208 pass209class AitoffAxes(GeoAxes):210 name = 'aitoff'211 class AitoffTransform(Transform):212 """213 The base Aitoff transform.214 """215 input_dims = 2216 output_dims = 2217 is_separable = False218 def __init__(self, resolution):219 """220 Create a new Aitoff transform. Resolution is the number of steps221 to interpolate between each input line segment to approximate its222 path in curved Aitoff space.223 """224 Transform.__init__(self)225 self._resolution = resolution226 def transform_non_affine(self, ll):227 longitude = ll[:, 0:1]228 latitude = ll[:, 1:2]229 # Pre-compute some values230 half_long = longitude /​ 2.0231 cos_latitude = np.cos(latitude)232 alpha = np.arccos(cos_latitude * np.cos(half_long))233 # Mask this array or we'll get divide-by-zero errors234 alpha = ma.masked_where(alpha == 0.0, alpha)235 # The numerators also need to be masked so that masked236 # division will be invoked.237 # We want unnormalized sinc. numpy.sinc gives us normalized238 sinc_alpha = ma.sin(alpha) /​ alpha239 x = (cos_latitude * ma.sin(half_long)) /​ sinc_alpha240 y = (ma.sin(latitude) /​ sinc_alpha)241 return np.concatenate((x.filled(0), y.filled(0)), 1)242 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__243 def transform_path_non_affine(self, path):244 vertices = path.vertices245 ipath = path.interpolated(self._resolution)246 return Path(self.transform(ipath.vertices), ipath.codes)247 transform_path_non_affine.__doc__ = Transform.transform_path_non_affine.__doc__248 def inverted(self):249 return AitoffAxes.InvertedAitoffTransform(self._resolution)250 inverted.__doc__ = Transform.inverted.__doc__251 class InvertedAitoffTransform(Transform):252 input_dims = 2253 output_dims = 2254 is_separable = False255 def __init__(self, resolution):256 Transform.__init__(self)257 self._resolution = resolution258 def transform_non_affine(self, xy):259 # MGDTODO: Math is hard ;(260 return xy261 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__262 def inverted(self):263 return AitoffAxes.AitoffTransform(self._resolution)264 inverted.__doc__ = Transform.inverted.__doc__265 def __init__(self, *args, **kwargs):266 self._longitude_cap = np.pi /​ 2.0267 GeoAxes.__init__(self, *args, **kwargs)268 self.set_aspect(0.5, adjustable='box', anchor='C')269 self.cla()270 def _get_core_transform(self, resolution):271 return self.AitoffTransform(resolution)272class HammerAxes(GeoAxes):273 name = 'hammer'274 class HammerTransform(Transform):275 """276 The base Hammer transform.277 """278 input_dims = 2279 output_dims = 2280 is_separable = False281 def __init__(self, resolution):282 """283 Create a new Hammer transform. Resolution is the number of steps284 to interpolate between each input line segment to approximate its285 path in curved Hammer space.286 """287 Transform.__init__(self)288 self._resolution = resolution289 def transform_non_affine(self, ll):290 longitude = ll[:, 0:1]291 latitude = ll[:, 1:2]292 # Pre-compute some values293 half_long = longitude /​ 2.0294 cos_latitude = np.cos(latitude)295 sqrt2 = np.sqrt(2.0)296 alpha = np.sqrt(1.0 + cos_latitude * np.cos(half_long))297 x = (2.0 * sqrt2) * (cos_latitude * np.sin(half_long)) /​ alpha298 y = (sqrt2 * np.sin(latitude)) /​ alpha299 return np.concatenate((x, y), 1)300 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__301 def transform_path_non_affine(self, path):302 vertices = path.vertices303 ipath = path.interpolated(self._resolution)304 return Path(self.transform(ipath.vertices), ipath.codes)305 transform_path_non_affine.__doc__ = Transform.transform_path_non_affine.__doc__306 def inverted(self):307 return HammerAxes.InvertedHammerTransform(self._resolution)308 inverted.__doc__ = Transform.inverted.__doc__309 class InvertedHammerTransform(Transform):310 input_dims = 2311 output_dims = 2312 is_separable = False313 def __init__(self, resolution):314 Transform.__init__(self)315 self._resolution = resolution316 def transform_non_affine(self, xy):317 x = xy[:, 0:1]318 y = xy[:, 1:2]319 quarter_x = 0.25 * x320 half_y = 0.5 * y321 z = np.sqrt(1.0 - quarter_x*quarter_x - half_y*half_y)322 longitude = 2 * np.arctan((z*x) /​ (2.0 * (2.0*z*z - 1.0)))323 latitude = np.arcsin(y*z)324 return np.concatenate((longitude, latitude), 1)325 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__326 def inverted(self):327 return HammerAxes.HammerTransform(self._resolution)328 inverted.__doc__ = Transform.inverted.__doc__329 def __init__(self, *args, **kwargs):330 self._longitude_cap = np.pi /​ 2.0331 GeoAxes.__init__(self, *args, **kwargs)332 self.set_aspect(0.5, adjustable='box', anchor='C')333 self.cla()334 def _get_core_transform(self, resolution):335 return self.HammerTransform(resolution)336class MollweideAxes(GeoAxes):337 name = 'mollweide'338 class MollweideTransform(Transform):339 """340 The base Mollweide transform.341 """342 input_dims = 2343 output_dims = 2344 is_separable = False345 def __init__(self, resolution):346 """347 Create a new Mollweide transform. Resolution is the number of steps348 to interpolate between each input line segment to approximate its349 path in curved Mollweide space.350 """351 Transform.__init__(self)352 self._resolution = resolution353 def transform_non_affine(self, ll):354 def d(theta):355 delta = -(theta + np.sin(theta) - pi_sin_l) /​ (1 + np.cos(theta))356 return delta, np.abs(delta) > 0.001357 longitude = ll[:, 0]358 latitude = ll[:, 1]359 clat = np.pi/​2 - np.abs(latitude)360 ihigh = clat < 0.087 # within 5 degrees of the poles361 ilow = ~ihigh362 aux = np.empty(latitude.shape, dtype=np.float)363 if ilow.any(): # Newton-Raphson iteration364 pi_sin_l = np.pi * np.sin(latitude[ilow])365 theta = 2.0 * latitude[ilow]366 delta, large_delta = d(theta)367 while np.any(large_delta):368 theta[large_delta] += delta[large_delta]369 delta, large_delta = d(theta)370 aux[ilow] = theta /​ 2371 if ihigh.any(): # Taylor series-based approx. solution372 e = clat[ihigh]373 d = 0.5 * (3 * np.pi * e**2) ** (1.0/​3)374 aux[ihigh] = (np.pi/​2 - d) * np.sign(latitude[ihigh])375 xy = np.empty(ll.shape, dtype=np.float)376 xy[:,0] = (2.0 * np.sqrt(2.0) /​ np.pi) * longitude * np.cos(aux)377 xy[:,1] = np.sqrt(2.0) * np.sin(aux)378 return xy379 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__380 def transform_path_non_affine(self, path):381 vertices = path.vertices382 ipath = path.interpolated(self._resolution)383 return Path(self.transform(ipath.vertices), ipath.codes)384 transform_path_non_affine.__doc__ = Transform.transform_path_non_affine.__doc__385 def inverted(self):386 return MollweideAxes.InvertedMollweideTransform(self._resolution)387 inverted.__doc__ = Transform.inverted.__doc__388 class InvertedMollweideTransform(Transform):389 input_dims = 2390 output_dims = 2391 is_separable = False392 def __init__(self, resolution):393 Transform.__init__(self)394 self._resolution = resolution395 def transform_non_affine(self, xy):396 x = xy[:, 0:1]397 y = xy[:, 1:2]398 # from Equations (7, 8) of399 # http:/​/​mathworld.wolfram.com/​MollweideProjection.html400 theta = np.arcsin(y /​ np.sqrt(2))401 lon = (np.pi /​ (2 * np.sqrt(2))) * x /​ np.cos(theta)402 lat = np.arcsin((2 * theta + np.sin(2 * theta)) /​ np.pi)403 return np.concatenate((lon, lat), 1)404 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__405 def inverted(self):406 return MollweideAxes.MollweideTransform(self._resolution)407 inverted.__doc__ = Transform.inverted.__doc__408 def __init__(self, *args, **kwargs):409 self._longitude_cap = np.pi /​ 2.0410 GeoAxes.__init__(self, *args, **kwargs)411 self.set_aspect(0.5, adjustable='box', anchor='C')412 self.cla()413 def _get_core_transform(self, resolution):414 return self.MollweideTransform(resolution)415class LambertAxes(GeoAxes):416 name = 'lambert'417 class LambertTransform(Transform):418 """419 The base Lambert transform.420 """421 input_dims = 2422 output_dims = 2423 is_separable = False424 def __init__(self, center_longitude, center_latitude, resolution):425 """426 Create a new Lambert transform. Resolution is the number of steps427 to interpolate between each input line segment to approximate its428 path in curved Lambert space.429 """430 Transform.__init__(self)431 self._resolution = resolution432 self._center_longitude = center_longitude433 self._center_latitude = center_latitude434 def transform_non_affine(self, ll):435 longitude = ll[:, 0:1]436 latitude = ll[:, 1:2]437 clong = self._center_longitude438 clat = self._center_latitude439 cos_lat = np.cos(latitude)440 sin_lat = np.sin(latitude)441 diff_long = longitude - clong442 cos_diff_long = np.cos(diff_long)443 inner_k = (1.0 +444 np.sin(clat)*sin_lat +445 np.cos(clat)*cos_lat*cos_diff_long)446 # Prevent divide-by-zero problems447 inner_k = np.where(inner_k == 0.0, 1e-15, inner_k)448 k = np.sqrt(2.0 /​ inner_k)449 x = k*cos_lat*np.sin(diff_long)450 y = k*(np.cos(clat)*sin_lat -451 np.sin(clat)*cos_lat*cos_diff_long)452 return np.concatenate((x, y), 1)453 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__454 def transform_path_non_affine(self, path):455 vertices = path.vertices456 ipath = path.interpolated(self._resolution)457 return Path(self.transform(ipath.vertices), ipath.codes)458 transform_path_non_affine.__doc__ = Transform.transform_path_non_affine.__doc__459 def inverted(self):460 return LambertAxes.InvertedLambertTransform(461 self._center_longitude,462 self._center_latitude,463 self._resolution)464 inverted.__doc__ = Transform.inverted.__doc__465 class InvertedLambertTransform(Transform):466 input_dims = 2467 output_dims = 2468 is_separable = False469 def __init__(self, center_longitude, center_latitude, resolution):470 Transform.__init__(self)471 self._resolution = resolution472 self._center_longitude = center_longitude473 self._center_latitude = center_latitude474 def transform_non_affine(self, xy):475 x = xy[:, 0:1]476 y = xy[:, 1:2]477 clong = self._center_longitude478 clat = self._center_latitude479 p = np.sqrt(x*x + y*y)480 p = np.where(p == 0.0, 1e-9, p)481 c = 2.0 * np.arcsin(0.5 * p)482 sin_c = np.sin(c)483 cos_c = np.cos(c)484 lat = np.arcsin(cos_c*np.sin(clat) +485 ((y*sin_c*np.cos(clat)) /​ p))486 lon = clong + np.arctan(487 (x*sin_c) /​ (p*np.cos(clat)*cos_c - y*np.sin(clat)*sin_c))488 return np.concatenate((lon, lat), 1)489 transform_non_affine.__doc__ = Transform.transform_non_affine.__doc__490 def inverted(self):491 return LambertAxes.LambertTransform(492 self._center_longitude,493 self._center_latitude,494 self._resolution)495 inverted.__doc__ = Transform.inverted.__doc__496 def __init__(self, *args, **kwargs):497 self._longitude_cap = np.pi /​ 2.0498 self._center_longitude = kwargs.pop("center_longitude", 0.0)499 self._center_latitude = kwargs.pop("center_latitude", 0.0)500 GeoAxes.__init__(self, *args, **kwargs)501 self.set_aspect('equal', adjustable='box', anchor='C')502 self.cla()503 def cla(self):504 GeoAxes.cla(self)505 self.yaxis.set_major_formatter(NullFormatter())506 def _get_core_transform(self, resolution):507 return self.LambertTransform(508 self._center_longitude,509 self._center_latitude,510 resolution)511 def _get_affine_transform(self):512 return Affine2D() \513 .scale(0.25) \...

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affinetransform.js

Source:affinetransform.js Github

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1/​/​ Copyright 2008 The Closure Library Authors. All Rights Reserved.2/​/​3/​/​ Licensed under the Apache License, Version 2.0 (the "License");4/​/​ you may not use this file except in compliance with the License.5/​/​ You may obtain a copy of the License at6/​/​7/​/​ http:/​/​www.apache.org/​licenses/​LICENSE-2.08/​/​9/​/​ Unless required by applicable law or agreed to in writing, software10/​/​ distributed under the License is distributed on an "AS-IS" BASIS,11/​/​ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12/​/​ See the License for the specific language governing permissions and13/​/​ limitations under the License.14/​**15 * @fileoverview Provides an object representation of an AffineTransform and16 * methods for working with it.17 */​18goog.provide('goog.graphics.AffineTransform');19goog.require('goog.math');20/​**21 * Creates a 2D affine transform. An affine transform performs a linear22 * mapping from 2D coordinates to other 2D coordinates that preserves the23 * "straightness" and "parallelness" of lines.24 *25 * Such a coordinate transformation can be represented by a 3 row by 3 column26 * matrix with an implied last row of [ 0 0 1 ]. This matrix transforms source27 * coordinates (x,y) into destination coordinates (x',y') by considering them28 * to be a column vector and multiplying the coordinate vector by the matrix29 * according to the following process:30 * <pre>31 * [ x'] [ m00 m01 m02 ] [ x ] [ m00x + m01y + m02 ]32 * [ y'] = [ m10 m11 m12 ] [ y ] = [ m10x + m11y + m12 ]33 * [ 1 ] [ 0 0 1 ] [ 1 ] [ 1 ]34 * </​pre>35 *36 * This class is optimized for speed and minimizes calculations based on its37 * knowledge of the underlying matrix (as opposed to say simply performing38 * matrix multiplication).39 *40 * @param {number=} opt_m00 The m00 coordinate of the transform.41 * @param {number=} opt_m10 The m10 coordinate of the transform.42 * @param {number=} opt_m01 The m01 coordinate of the transform.43 * @param {number=} opt_m11 The m11 coordinate of the transform.44 * @param {number=} opt_m02 The m02 coordinate of the transform.45 * @param {number=} opt_m12 The m12 coordinate of the transform.46 * @constructor47 */​48goog.graphics.AffineTransform = function(opt_m00, opt_m10, opt_m01,49 opt_m11, opt_m02, opt_m12) {50 if (arguments.length == 6) {51 this.setTransform(/​** @type {number} */​ (opt_m00),52 /​** @type {number} */​ (opt_m10),53 /​** @type {number} */​ (opt_m01),54 /​** @type {number} */​ (opt_m11),55 /​** @type {number} */​ (opt_m02),56 /​** @type {number} */​ (opt_m12));57 } else if (arguments.length != 0) {58 throw Error('Insufficient matrix parameters');59 } else {60 this.m00_ = this.m11_ = 1;61 this.m10_ = this.m01_ = this.m02_ = this.m12_ = 0;62 }63};64/​**65 * @return {boolean} Whether this transform is the identity transform.66 */​67goog.graphics.AffineTransform.prototype.isIdentity = function() {68 return this.m00_ == 1 && this.m10_ == 0 && this.m01_ == 0 &&69 this.m11_ == 1 && this.m02_ == 0 && this.m12_ == 0;70};71/​**72 * @return {!goog.graphics.AffineTransform} A copy of this transform.73 */​74goog.graphics.AffineTransform.prototype.clone = function() {75 return new goog.graphics.AffineTransform(this.m00_, this.m10_, this.m01_,76 this.m11_, this.m02_, this.m12_);77};78/​**79 * Sets this transform to the matrix specified by the 6 values.80 *81 * @param {number} m00 The m00 coordinate of the transform.82 * @param {number} m10 The m10 coordinate of the transform.83 * @param {number} m01 The m01 coordinate of the transform.84 * @param {number} m11 The m11 coordinate of the transform.85 * @param {number} m02 The m02 coordinate of the transform.86 * @param {number} m12 The m12 coordinate of the transform.87 * @return {!goog.graphics.AffineTransform} This affine transform.88 */​89goog.graphics.AffineTransform.prototype.setTransform = function(m00, m10, m01,90 m11, m02, m12) {91 if (!goog.isNumber(m00) || !goog.isNumber(m10) || !goog.isNumber(m01) ||92 !goog.isNumber(m11) || !goog.isNumber(m02) || !goog.isNumber(m12)) {93 throw Error('Invalid transform parameters');94 }95 this.m00_ = m00;96 this.m10_ = m10;97 this.m01_ = m01;98 this.m11_ = m11;99 this.m02_ = m02;100 this.m12_ = m12;101 return this;102};103/​**104 * Sets this transform to be identical to the given transform.105 *106 * @param {!goog.graphics.AffineTransform} tx The transform to copy.107 * @return {!goog.graphics.AffineTransform} This affine transform.108 */​109goog.graphics.AffineTransform.prototype.copyFrom = function(tx) {110 this.m00_ = tx.m00_;111 this.m10_ = tx.m10_;112 this.m01_ = tx.m01_;113 this.m11_ = tx.m11_;114 this.m02_ = tx.m02_;115 this.m12_ = tx.m12_;116 return this;117};118/​**119 * Concatenates this transform with a scaling transformation.120 *121 * @param {number} sx The x-axis scaling factor.122 * @param {number} sy The y-axis scaling factor.123 * @return {!goog.graphics.AffineTransform} This affine transform.124 */​125goog.graphics.AffineTransform.prototype.scale = function(sx, sy) {126 this.m00_ *= sx;127 this.m10_ *= sx;128 this.m01_ *= sy;129 this.m11_ *= sy;130 return this;131};132/​**133 * Pre-concatenates this transform with a scaling transformation,134 * i.e. calculates the following matrix product:135 *136 * <pre>137 * [sx 0 0] [m00 m01 m02]138 * [ 0 sy 0] [m10 m11 m12]139 * [ 0 0 1] [ 0 0 1]140 * </​pre>141 *142 * @param {number} sx The x-axis scaling factor.143 * @param {number} sy The y-axis scaling factor.144 * @return {!goog.graphics.AffineTransform} This affine transform.145 */​146goog.graphics.AffineTransform.prototype.preScale = function(sx, sy) {147 this.m00_ *= sx;148 this.m01_ *= sx;149 this.m02_ *= sx;150 this.m10_ *= sy;151 this.m11_ *= sy;152 this.m12_ *= sy;153 return this;154};155/​**156 * Concatenates this transform with a translate transformation.157 *158 * @param {number} dx The distance to translate in the x direction.159 * @param {number} dy The distance to translate in the y direction.160 * @return {!goog.graphics.AffineTransform} This affine transform.161 */​162goog.graphics.AffineTransform.prototype.translate = function(dx, dy) {163 this.m02_ += dx * this.m00_ + dy * this.m01_;164 this.m12_ += dx * this.m10_ + dy * this.m11_;165 return this;166};167/​**168 * Pre-concatenates this transform with a translate transformation,169 * i.e. calculates the following matrix product:170 *171 * <pre>172 * [1 0 dx] [m00 m01 m02]173 * [0 1 dy] [m10 m11 m12]174 * [0 0 1] [ 0 0 1]175 * </​pre>176 *177 * @param {number} dx The distance to translate in the x direction.178 * @param {number} dy The distance to translate in the y direction.179 * @return {!goog.graphics.AffineTransform} This affine transform.180 */​181goog.graphics.AffineTransform.prototype.preTranslate = function(dx, dy) {182 this.m02_ += dx;183 this.m12_ += dy;184 return this;185};186/​**187 * Concatenates this transform with a rotation transformation around an anchor188 * point.189 *190 * @param {number} theta The angle of rotation measured in radians.191 * @param {number} x The x coordinate of the anchor point.192 * @param {number} y The y coordinate of the anchor point.193 * @return {!goog.graphics.AffineTransform} This affine transform.194 */​195goog.graphics.AffineTransform.prototype.rotate = function(theta, x, y) {196 return this.concatenate(197 goog.graphics.AffineTransform.getRotateInstance(theta, x, y));198};199/​**200 * Pre-concatenates this transform with a rotation transformation around an201 * anchor point.202 *203 * @param {number} theta The angle of rotation measured in radians.204 * @param {number} x The x coordinate of the anchor point.205 * @param {number} y The y coordinate of the anchor point.206 * @return {!goog.graphics.AffineTransform} This affine transform.207 */​208goog.graphics.AffineTransform.prototype.preRotate = function(theta, x, y) {209 return this.preConcatenate(210 goog.graphics.AffineTransform.getRotateInstance(theta, x, y));211};212/​**213 * Concatenates this transform with a shear transformation.214 *215 * @param {number} shx The x shear factor.216 * @param {number} shy The y shear factor.217 * @return {!goog.graphics.AffineTransform} This affine transform.218 */​219goog.graphics.AffineTransform.prototype.shear = function(shx, shy) {220 var m00 = this.m00_;221 var m10 = this.m10_;222 this.m00_ += shy * this.m01_;223 this.m10_ += shy * this.m11_;224 this.m01_ += shx * m00;225 this.m11_ += shx * m10;226 return this;227};228/​**229 * Pre-concatenates this transform with a shear transformation.230 * i.e. calculates the following matrix product:231 *232 * <pre>233 * [ 1 shx 0] [m00 m01 m02]234 * [shy 1 0] [m10 m11 m12]235 * [ 0 0 1] [ 0 0 1]236 * </​pre>237 *238 * @param {number} shx The x shear factor.239 * @param {number} shy The y shear factor.240 * @return {!goog.graphics.AffineTransform} This affine transform.241 */​242goog.graphics.AffineTransform.prototype.preShear = function(shx, shy) {243 var m00 = this.m00_;244 var m01 = this.m01_;245 var m02 = this.m02_;246 this.m00_ += shx * this.m10_;247 this.m01_ += shx * this.m11_;248 this.m02_ += shx * this.m12_;249 this.m10_ += shy * m00;250 this.m11_ += shy * m01;251 this.m12_ += shy * m02;252 return this;253};254/​**255 * @return {string} A string representation of this transform. The format of256 * of the string is compatible with SVG matrix notation, i.e.257 * "matrix(a,b,c,d,e,f)".258 * @override259 */​260goog.graphics.AffineTransform.prototype.toString = function() {261 return 'matrix(' +262 [this.m00_, this.m10_, this.m01_, this.m11_, this.m02_, this.m12_].join(263 ',') +264 ')';265};266/​**267 * @return {number} The scaling factor in the x-direction (m00).268 */​269goog.graphics.AffineTransform.prototype.getScaleX = function() {270 return this.m00_;271};272/​**273 * @return {number} The scaling factor in the y-direction (m11).274 */​275goog.graphics.AffineTransform.prototype.getScaleY = function() {276 return this.m11_;277};278/​**279 * @return {number} The translation in the x-direction (m02).280 */​281goog.graphics.AffineTransform.prototype.getTranslateX = function() {282 return this.m02_;283};284/​**285 * @return {number} The translation in the y-direction (m12).286 */​287goog.graphics.AffineTransform.prototype.getTranslateY = function() {288 return this.m12_;289};290/​**291 * @return {number} The shear factor in the x-direction (m01).292 */​293goog.graphics.AffineTransform.prototype.getShearX = function() {294 return this.m01_;295};296/​**297 * @return {number} The shear factor in the y-direction (m10).298 */​299goog.graphics.AffineTransform.prototype.getShearY = function() {300 return this.m10_;301};302/​**303 * Concatenates an affine transform to this transform.304 *305 * @param {!goog.graphics.AffineTransform} tx The transform to concatenate.306 * @return {!goog.graphics.AffineTransform} This affine transform.307 */​308goog.graphics.AffineTransform.prototype.concatenate = function(tx) {309 var m0 = this.m00_;310 var m1 = this.m01_;311 this.m00_ = tx.m00_ * m0 + tx.m10_ * m1;312 this.m01_ = tx.m01_ * m0 + tx.m11_ * m1;313 this.m02_ += tx.m02_ * m0 + tx.m12_ * m1;314 m0 = this.m10_;315 m1 = this.m11_;316 this.m10_ = tx.m00_ * m0 + tx.m10_ * m1;317 this.m11_ = tx.m01_ * m0 + tx.m11_ * m1;318 this.m12_ += tx.m02_ * m0 + tx.m12_ * m1;319 return this;320};321/​**322 * Pre-concatenates an affine transform to this transform.323 *324 * @param {!goog.graphics.AffineTransform} tx The transform to preconcatenate.325 * @return {!goog.graphics.AffineTransform} This affine transform.326 */​327goog.graphics.AffineTransform.prototype.preConcatenate = function(tx) {328 var m0 = this.m00_;329 var m1 = this.m10_;330 this.m00_ = tx.m00_ * m0 + tx.m01_ * m1;331 this.m10_ = tx.m10_ * m0 + tx.m11_ * m1;332 m0 = this.m01_;333 m1 = this.m11_;334 this.m01_ = tx.m00_ * m0 + tx.m01_ * m1;335 this.m11_ = tx.m10_ * m0 + tx.m11_ * m1;336 m0 = this.m02_;337 m1 = this.m12_;338 this.m02_ = tx.m00_ * m0 + tx.m01_ * m1 + tx.m02_;339 this.m12_ = tx.m10_ * m0 + tx.m11_ * m1 + tx.m12_;340 return this;341};342/​**343 * Transforms an array of coordinates by this transform and stores the result344 * into a destination array.345 *346 * @param {!Array.<number>} src The array containing the source points347 * as x, y value pairs.348 * @param {number} srcOff The offset to the first point to be transformed.349 * @param {!Array.<number>} dst The array into which to store the transformed350 * point pairs.351 * @param {number} dstOff The offset of the location of the first transformed352 * point in the destination array.353 * @param {number} numPts The number of points to tranform.354 */​355goog.graphics.AffineTransform.prototype.transform = function(src, srcOff, dst,356 dstOff, numPts) {357 var i = srcOff;358 var j = dstOff;359 var srcEnd = srcOff + 2 * numPts;360 while (i < srcEnd) {361 var x = src[i++];362 var y = src[i++];363 dst[j++] = x * this.m00_ + y * this.m01_ + this.m02_;364 dst[j++] = x * this.m10_ + y * this.m11_ + this.m12_;365 }366};367/​**368 * @return {number} The determinant of this transform.369 */​370goog.graphics.AffineTransform.prototype.getDeterminant = function() {371 return this.m00_ * this.m11_ - this.m01_ * this.m10_;372};373/​**374 * Returns whether the transform is invertible. A transform is not invertible375 * if the determinant is 0 or any value is non-finite or NaN.376 *377 * @return {boolean} Whether the transform is invertible.378 */​379goog.graphics.AffineTransform.prototype.isInvertible = function() {380 var det = this.getDeterminant();381 return goog.math.isFiniteNumber(det) &&382 goog.math.isFiniteNumber(this.m02_) &&383 goog.math.isFiniteNumber(this.m12_) &&384 det != 0;385};386/​**387 * @return {!goog.graphics.AffineTransform} An AffineTransform object388 * representing the inverse transformation.389 */​390goog.graphics.AffineTransform.prototype.createInverse = function() {391 var det = this.getDeterminant();392 return new goog.graphics.AffineTransform(393 this.m11_ /​ det,394 -this.m10_ /​ det,395 -this.m01_ /​ det,396 this.m00_ /​ det,397 (this.m01_ * this.m12_ - this.m11_ * this.m02_) /​ det,398 (this.m10_ * this.m02_ - this.m00_ * this.m12_) /​ det);399};400/​**401 * Creates a transform representing a scaling transformation.402 *403 * @param {number} sx The x-axis scaling factor.404 * @param {number} sy The y-axis scaling factor.405 * @return {!goog.graphics.AffineTransform} A transform representing a scaling406 * transformation.407 */​408goog.graphics.AffineTransform.getScaleInstance = function(sx, sy) {409 return new goog.graphics.AffineTransform().setToScale(sx, sy);410};411/​**412 * Creates a transform representing a translation transformation.413 *414 * @param {number} dx The distance to translate in the x direction.415 * @param {number} dy The distance to translate in the y direction.416 * @return {!goog.graphics.AffineTransform} A transform representing a417 * translation transformation.418 */​419goog.graphics.AffineTransform.getTranslateInstance = function(dx, dy) {420 return new goog.graphics.AffineTransform().setToTranslation(dx, dy);421};422/​**423 * Creates a transform representing a shearing transformation.424 *425 * @param {number} shx The x-axis shear factor.426 * @param {number} shy The y-axis shear factor.427 * @return {!goog.graphics.AffineTransform} A transform representing a shearing428 * transformation.429 */​430goog.graphics.AffineTransform.getShearInstance = function(shx, shy) {431 return new goog.graphics.AffineTransform().setToShear(shx, shy);432};433/​**434 * Creates a transform representing a rotation transformation.435 *436 * @param {number} theta The angle of rotation measured in radians.437 * @param {number} x The x coordinate of the anchor point.438 * @param {number} y The y coordinate of the anchor point.439 * @return {!goog.graphics.AffineTransform} A transform representing a rotation440 * transformation.441 */​442goog.graphics.AffineTransform.getRotateInstance = function(theta, x, y) {443 return new goog.graphics.AffineTransform().setToRotation(theta, x, y);444};445/​**446 * Sets this transform to a scaling transformation.447 *448 * @param {number} sx The x-axis scaling factor.449 * @param {number} sy The y-axis scaling factor.450 * @return {!goog.graphics.AffineTransform} This affine transform.451 */​452goog.graphics.AffineTransform.prototype.setToScale = function(sx, sy) {453 return this.setTransform(sx, 0, 0, sy, 0, 0);454};455/​**456 * Sets this transform to a translation transformation.457 *458 * @param {number} dx The distance to translate in the x direction.459 * @param {number} dy The distance to translate in the y direction.460 * @return {!goog.graphics.AffineTransform} This affine transform.461 */​462goog.graphics.AffineTransform.prototype.setToTranslation = function(dx, dy) {463 return this.setTransform(1, 0, 0, 1, dx, dy);464};465/​**466 * Sets this transform to a shearing transformation.467 *468 * @param {number} shx The x-axis shear factor.469 * @param {number} shy The y-axis shear factor.470 * @return {!goog.graphics.AffineTransform} This affine transform.471 */​472goog.graphics.AffineTransform.prototype.setToShear = function(shx, shy) {473 return this.setTransform(1, shy, shx, 1, 0, 0);474};475/​**476 * Sets this transform to a rotation transformation.477 *478 * @param {number} theta The angle of rotation measured in radians.479 * @param {number} x The x coordinate of the anchor point.480 * @param {number} y The y coordinate of the anchor point.481 * @return {!goog.graphics.AffineTransform} This affine transform.482 */​483goog.graphics.AffineTransform.prototype.setToRotation = function(theta, x, y) {484 var cos = Math.cos(theta);485 var sin = Math.sin(theta);486 return this.setTransform(cos, sin, -sin, cos,487 x - x * cos + y * sin, y - x * sin - y * cos);488};489/​**490 * Compares two affine transforms for equality.491 *492 * @param {goog.graphics.AffineTransform} tx The other affine transform.493 * @return {boolean} whether the two transforms are equal.494 */​495goog.graphics.AffineTransform.prototype.equals = function(tx) {496 if (this == tx) {497 return true;498 }499 if (!tx) {500 return false;501 }502 return this.m00_ == tx.m00_ &&503 this.m01_ == tx.m01_ &&504 this.m02_ == tx.m02_ &&505 this.m10_ == tx.m10_ &&506 this.m11_ == tx.m11_ &&507 this.m12_ == tx.m12_;...

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_LookupTransformResult.py

Source:_LookupTransformResult.py Github

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1# This Python file uses the following encoding: utf-82"""autogenerated by genpy from tf2_msgs/​LookupTransformResult.msg. Do not edit."""3import sys4python3 = True if sys.hexversion > 0x03000000 else False5import genpy6import struct7import geometry_msgs.msg8import tf2_msgs.msg9import std_msgs.msg10class LookupTransformResult(genpy.Message):11 _md5sum = "3fe5db6a19ca9cfb675418c5ad875c36"12 _type = "tf2_msgs/​LookupTransformResult"13 _has_header = False #flag to mark the presence of a Header object14 _full_text = """# ====== DO NOT MODIFY! AUTOGENERATED FROM AN ACTION DEFINITION ======15geometry_msgs/​TransformStamped transform16tf2_msgs/​TF2Error error17================================================================================18MSG: geometry_msgs/​TransformStamped19# This expresses a transform from coordinate frame header.frame_id20# to the coordinate frame child_frame_id21#22# This message is mostly used by the 23# <a href="http:/​/​www.ros.org/​wiki/​tf">tf</​a> package. 24# See its documentation for more information.25Header header26string child_frame_id # the frame id of the child frame27Transform transform28================================================================================29MSG: std_msgs/​Header30# Standard metadata for higher-level stamped data types.31# This is generally used to communicate timestamped data 32# in a particular coordinate frame.33# 34# sequence ID: consecutively increasing ID 35uint32 seq36#Two-integer timestamp that is expressed as:37# * stamp.sec: seconds (stamp_secs) since epoch (in Python the variable is called 'secs')38# * stamp.nsec: nanoseconds since stamp_secs (in Python the variable is called 'nsecs')39# time-handling sugar is provided by the client library40time stamp41#Frame this data is associated with42# 0: no frame43# 1: global frame44string frame_id45================================================================================46MSG: geometry_msgs/​Transform47# This represents the transform between two coordinate frames in free space.48Vector3 translation49Quaternion rotation50================================================================================51MSG: geometry_msgs/​Vector352# This represents a vector in free space. 53# It is only meant to represent a direction. Therefore, it does not54# make sense to apply a translation to it (e.g., when applying a 55# generic rigid transformation to a Vector3, tf2 will only apply the56# rotation). If you want your data to be translatable too, use the57# geometry_msgs/​Point message instead.58float64 x59float64 y60float64 z61================================================================================62MSG: geometry_msgs/​Quaternion63# This represents an orientation in free space in quaternion form.64float64 x65float64 y66float64 z67float64 w68================================================================================69MSG: tf2_msgs/​TF2Error70uint8 NO_ERROR = 071uint8 LOOKUP_ERROR = 172uint8 CONNECTIVITY_ERROR = 273uint8 EXTRAPOLATION_ERROR = 374uint8 INVALID_ARGUMENT_ERROR = 475uint8 TIMEOUT_ERROR = 576uint8 TRANSFORM_ERROR = 677uint8 error78string error_string79"""80 __slots__ = ['transform','error']81 _slot_types = ['geometry_msgs/​TransformStamped','tf2_msgs/​TF2Error']82 def __init__(self, *args, **kwds):83 """84 Constructor. Any message fields that are implicitly/​explicitly85 set to None will be assigned a default value. The recommend86 use is keyword arguments as this is more robust to future message87 changes. You cannot mix in-order arguments and keyword arguments.88 The available fields are:89 transform,error90 :param args: complete set of field values, in .msg order91 :param kwds: use keyword arguments corresponding to message field names92 to set specific fields.93 """94 if args or kwds:95 super(LookupTransformResult, self).__init__(*args, **kwds)96 #message fields cannot be None, assign default values for those that are97 if self.transform is None:98 self.transform = geometry_msgs.msg.TransformStamped()99 if self.error is None:100 self.error = tf2_msgs.msg.TF2Error()101 else:102 self.transform = geometry_msgs.msg.TransformStamped()103 self.error = tf2_msgs.msg.TF2Error()104 def _get_types(self):105 """106 internal API method107 """108 return self._slot_types109 def serialize(self, buff):110 """111 serialize message into buffer112 :param buff: buffer, ``StringIO``113 """114 try:115 _x = self116 buff.write(_struct_3I.pack(_x.transform.header.seq, _x.transform.header.stamp.secs, _x.transform.header.stamp.nsecs))117 _x = self.transform.header.frame_id118 length = len(_x)119 if python3 or type(_x) == unicode:120 _x = _x.encode('utf-8')121 length = len(_x)122 if python3:123 buff.write(struct.pack('<I%sB'%length, length, *_x))124 else:125 buff.write(struct.pack('<I%ss'%length, length, _x))126 _x = self.transform.child_frame_id127 length = len(_x)128 if python3 or type(_x) == unicode:129 _x = _x.encode('utf-8')130 length = len(_x)131 if python3:132 buff.write(struct.pack('<I%sB'%length, length, *_x))133 else:134 buff.write(struct.pack('<I%ss'%length, length, _x))135 _x = self136 buff.write(_struct_7dB.pack(_x.transform.transform.translation.x, _x.transform.transform.translation.y, _x.transform.transform.translation.z, _x.transform.transform.rotation.x, _x.transform.transform.rotation.y, _x.transform.transform.rotation.z, _x.transform.transform.rotation.w, _x.error.error))137 _x = self.error.error_string138 length = len(_x)139 if python3 or type(_x) == unicode:140 _x = _x.encode('utf-8')141 length = len(_x)142 if python3:143 buff.write(struct.pack('<I%sB'%length, length, *_x))144 else:145 buff.write(struct.pack('<I%ss'%length, length, _x))146 except struct.error as se: self._check_types(struct.error("%s: '%s' when writing '%s'" % (type(se), str(se), str(locals().get('_x', self)))))147 except TypeError as te: self._check_types(ValueError("%s: '%s' when writing '%s'" % (type(te), str(te), str(locals().get('_x', self)))))148 def deserialize(self, str):149 """150 unpack serialized message in str into this message instance151 :param str: byte array of serialized message, ``str``152 """153 try:154 if self.transform is None:155 self.transform = geometry_msgs.msg.TransformStamped()156 if self.error is None:157 self.error = tf2_msgs.msg.TF2Error()158 end = 0159 _x = self160 start = end161 end += 12162 (_x.transform.header.seq, _x.transform.header.stamp.secs, _x.transform.header.stamp.nsecs,) = _struct_3I.unpack(str[start:end])163 start = end164 end += 4165 (length,) = _struct_I.unpack(str[start:end])166 start = end167 end += length168 if python3:169 self.transform.header.frame_id = str[start:end].decode('utf-8')170 else:171 self.transform.header.frame_id = str[start:end]172 start = end173 end += 4174 (length,) = _struct_I.unpack(str[start:end])175 start = end176 end += length177 if python3:178 self.transform.child_frame_id = str[start:end].decode('utf-8')179 else:180 self.transform.child_frame_id = str[start:end]181 _x = self182 start = end183 end += 57184 (_x.transform.transform.translation.x, _x.transform.transform.translation.y, _x.transform.transform.translation.z, _x.transform.transform.rotation.x, _x.transform.transform.rotation.y, _x.transform.transform.rotation.z, _x.transform.transform.rotation.w, _x.error.error,) = _struct_7dB.unpack(str[start:end])185 start = end186 end += 4187 (length,) = _struct_I.unpack(str[start:end])188 start = end189 end += length190 if python3:191 self.error.error_string = str[start:end].decode('utf-8')192 else:193 self.error.error_string = str[start:end]194 return self195 except struct.error as e:196 raise genpy.DeserializationError(e) #most likely buffer underfill197 def serialize_numpy(self, buff, numpy):198 """199 serialize message with numpy array types into buffer200 :param buff: buffer, ``StringIO``201 :param numpy: numpy python module202 """203 try:204 _x = self205 buff.write(_struct_3I.pack(_x.transform.header.seq, _x.transform.header.stamp.secs, _x.transform.header.stamp.nsecs))206 _x = self.transform.header.frame_id207 length = len(_x)208 if python3 or type(_x) == unicode:209 _x = _x.encode('utf-8')210 length = len(_x)211 if python3:212 buff.write(struct.pack('<I%sB'%length, length, *_x))213 else:214 buff.write(struct.pack('<I%ss'%length, length, _x))215 _x = self.transform.child_frame_id216 length = len(_x)217 if python3 or type(_x) == unicode:218 _x = _x.encode('utf-8')219 length = len(_x)220 if python3:221 buff.write(struct.pack('<I%sB'%length, length, *_x))222 else:223 buff.write(struct.pack('<I%ss'%length, length, _x))224 _x = self225 buff.write(_struct_7dB.pack(_x.transform.transform.translation.x, _x.transform.transform.translation.y, _x.transform.transform.translation.z, _x.transform.transform.rotation.x, _x.transform.transform.rotation.y, _x.transform.transform.rotation.z, _x.transform.transform.rotation.w, _x.error.error))226 _x = self.error.error_string227 length = len(_x)228 if python3 or type(_x) == unicode:229 _x = _x.encode('utf-8')230 length = len(_x)231 if python3:232 buff.write(struct.pack('<I%sB'%length, length, *_x))233 else:234 buff.write(struct.pack('<I%ss'%length, length, _x))235 except struct.error as se: self._check_types(struct.error("%s: '%s' when writing '%s'" % (type(se), str(se), str(locals().get('_x', self)))))236 except TypeError as te: self._check_types(ValueError("%s: '%s' when writing '%s'" % (type(te), str(te), str(locals().get('_x', self)))))237 def deserialize_numpy(self, str, numpy):238 """239 unpack serialized message in str into this message instance using numpy for array types240 :param str: byte array of serialized message, ``str``241 :param numpy: numpy python module242 """243 try:244 if self.transform is None:245 self.transform = geometry_msgs.msg.TransformStamped()246 if self.error is None:247 self.error = tf2_msgs.msg.TF2Error()248 end = 0249 _x = self250 start = end251 end += 12252 (_x.transform.header.seq, _x.transform.header.stamp.secs, _x.transform.header.stamp.nsecs,) = _struct_3I.unpack(str[start:end])253 start = end254 end += 4255 (length,) = _struct_I.unpack(str[start:end])256 start = end257 end += length258 if python3:259 self.transform.header.frame_id = str[start:end].decode('utf-8')260 else:261 self.transform.header.frame_id = str[start:end]262 start = end263 end += 4264 (length,) = _struct_I.unpack(str[start:end])265 start = end266 end += length267 if python3:268 self.transform.child_frame_id = str[start:end].decode('utf-8')269 else:270 self.transform.child_frame_id = str[start:end]271 _x = self272 start = end273 end += 57274 (_x.transform.transform.translation.x, _x.transform.transform.translation.y, _x.transform.transform.translation.z, _x.transform.transform.rotation.x, _x.transform.transform.rotation.y, _x.transform.transform.rotation.z, _x.transform.transform.rotation.w, _x.error.error,) = _struct_7dB.unpack(str[start:end])275 start = end276 end += 4277 (length,) = _struct_I.unpack(str[start:end])278 start = end279 end += length280 if python3:281 self.error.error_string = str[start:end].decode('utf-8')282 else:283 self.error.error_string = str[start:end]284 return self285 except struct.error as e:286 raise genpy.DeserializationError(e) #most likely buffer underfill287_struct_I = genpy.struct_I288_struct_3I = struct.Struct("<3I")...

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convertTransform.js

Source:convertTransform.js Github

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...75 if (params.removeUseless) {76 data = removeUseless(data);77 }78 if (data.length) {79 item.attr(attrName).value = js2transform(data, params);80 } else {81 item.removeAttr(attrName);82 }83}84/​**85 * Defines precision to work with certain parts.86 * transformPrecision - for scale and four first matrix parameters (needs a better precision due to multiplying),87 * floatPrecision - for translate including two last matrix and rotate parameters,88 * degPrecision - for rotate and skew. By default it's equal to (rougly)89 * transformPrecision - 2 or floatPrecision whichever is lower. Can be set in params.90 *91 * @param {Array} transforms input array92 * @param {Object} params plugin params93 * @return {Array} output array94 */​95function definePrecision(data, params) {96 /​* jshint validthis: true */​97 var matrixData = data.reduce(getMatrixData, []),98 significantDigits = params.transformPrecision;99 /​/​ Clone params so it don't affect other elements transformations.100 params = EXTEND({}, params);101 /​/​ Limit transform precision with matrix one. Calculating with larger precision doesn't add any value.102 if (matrixData.length) {103 params.transformPrecision = Math.min(params.transformPrecision,104 Math.max.apply(Math, matrixData.map(floatDigits)) || params.transformPrecision);105 significantDigits = Math.max.apply(Math, matrixData.map(function(n) {106 return String(n).replace(/​\D+/​g, '').length; /​/​ Number of digits in a number. 123.45 → 5107 }));108 }109 /​/​ No sense in angle precision more then number of significant digits in matrix.110 if (!('degPrecision' in params)) {111 params.degPrecision = Math.max(0, Math.min(params.floatPrecision, significantDigits - 2));112 }113 floatRound = params.floatPrecision >= 1 && params.floatPrecision < 20 ?114 smartRound.bind(this, params.floatPrecision) :115 round;116 degRound = params.degPrecision >= 1 && params.floatPrecision < 20 ?117 smartRound.bind(this, params.degPrecision) :118 round;119 transformRound = params.transformPrecision >= 1 && params.floatPrecision < 20 ?120 smartRound.bind(this, params.transformPrecision) :121 round;122 return params;123}124/​**125 * Gathers four first matrix parameters.126 *127 * @param {Array} a array of data128 * @param {Object} transform129 * @return {Array} output array130 */​131function getMatrixData(a, b) {132 return b.name == 'matrix' ? a.concat(b.data.slice(0, 4)) : a;133}134/​**135 * Returns number of digits after the point. 0.125 → 3136 */​137function floatDigits(n) {138 return (n = String(n)).slice(n.indexOf('.')).length - 1;139}140/​**141 * Convert transforms to the shorthand alternatives.142 *143 * @param {Array} transforms input array144 * @param {Object} params plugin params145 * @return {Array} output array146 */​147function convertToShorts(transforms, params) {148 for(var i = 0; i < transforms.length; i++) {149 var transform = transforms[i];150 /​/​ convert matrix to the short aliases151 if (152 params.matrixToTransform &&153 transform.name === 'matrix'154 ) {155 var decomposed = matrixToTransform(transform, params);156 if (decomposed != transform &&157 js2transform(decomposed, params).length <= js2transform([transform], params).length) {158 transforms.splice.apply(transforms, [i, 1].concat(decomposed));159 }160 transform = transforms[i];161 }162 /​/​ fixed-point numbers163 /​/​ 12.754997 → 12.755164 roundTransform(transform);165 /​/​ convert long translate transform notation to the shorts one166 /​/​ translate(10 0) → translate(10)167 if (168 params.shortTranslate &&169 transform.name === 'translate' &&170 transform.data.length === 2 &&171 !transform.data[1]172 ) {173 transform.data.pop();174 }175 /​/​ convert long scale transform notation to the shorts one176 /​/​ scale(2 2) → scale(2)177 if (178 params.shortScale &&179 transform.name === 'scale' &&180 transform.data.length === 2 &&181 transform.data[0] === transform.data[1]182 ) {183 transform.data.pop();184 }185 /​/​ convert long rotate transform notation to the short one186 /​/​ translate(cx cy) rotate(a) translate(-cx -cy) → rotate(a cx cy)187 if (188 params.shortRotate &&189 transforms[i - 2] &&190 transforms[i - 2].name === 'translate' &&191 transforms[i - 1].name === 'rotate' &&192 transforms[i].name === 'translate' &&193 transforms[i - 2].data[0] === -transforms[i].data[0] &&194 transforms[i - 2].data[1] === -transforms[i].data[1]195 ) {196 transforms.splice(i - 2, 3, {197 name: 'rotate',198 data: [199 transforms[i - 1].data[0],200 transforms[i - 2].data[0],201 transforms[i - 2].data[1]202 ]203 });204 /​/​ splice compensation205 i -= 2;206 transform = transforms[i];207 }208 }209 return transforms;210}211/​**212 * Remove useless transforms.213 *214 * @param {Array} transforms input array215 * @return {Array} output array216 */​217function removeUseless(transforms) {218 return transforms.filter(function(transform) {219 /​/​ translate(0), rotate(0[, cx, cy]), skewX(0), skewY(0)220 if (221 ['translate', 'rotate', 'skewX', 'skewY'].indexOf(transform.name) > -1 &&222 (transform.data.length == 1 || transform.name == 'rotate') &&223 !transform.data[0] ||224 /​/​ translate(0, 0)225 transform.name == 'translate' &&226 !transform.data[0] &&227 !transform.data[1] ||228 /​/​ scale(1)229 transform.name == 'scale' &&230 transform.data[0] == 1 &&231 (transform.data.length < 2 || transform.data[1] == 1) ||232 /​/​ matrix(1 0 0 1 0 0)233 transform.name == 'matrix' &&234 transform.data[0] == 1 &&235 transform.data[3] == 1 &&236 !(transform.data[1] || transform.data[2] || transform.data[4] || transform.data[5])237 ) {238 return false;239 }240 return true;241 });242}243/​**244 * Convert transforms JS representation to string.245 *246 * @param {Array} transformJS JS representation array247 * @param {Object} params plugin params248 * @return {String} output string249 */​250function js2transform(transformJS, params) {251 var transformString = '';252 /​/​ collect output value string253 transformJS.forEach(function(transform) {254 roundTransform(transform);255 transformString += (transformString && ' ') + transform.name + '(' + cleanupOutData(transform.data, params) + ')';256 });257 return transformString;258}259function roundTransform(transform) {260 switch (transform.name) {261 case 'translate':262 transform.data = floatRound(transform.data);263 break;264 case 'rotate':...

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