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| goog.provide('ol.geom.SimpleGeometry');
goog.require('ol');
goog.require('ol.functions');
goog.require('ol.extent');
goog.require('ol.geom.Geometry');
goog.require('ol.geom.GeometryLayout');
goog.require('ol.geom.flat.transform');
goog.require('ol.obj');
/**
* @classdesc
* Abstract base class; only used for creating subclasses; do not instantiate
* in apps, as cannot be rendered.
*
* @constructor
* @abstract
* @extends {ol.geom.Geometry}
* @api
*/
ol.geom.SimpleGeometry = function() {
ol.geom.Geometry.call(this);
/**
* @protected
* @type {ol.geom.GeometryLayout}
*/
this.layout = ol.geom.GeometryLayout.XY;
/**
* @protected
* @type {number}
*/
this.stride = 2;
/**
* @protected
* @type {Array.<number>}
*/
this.flatCoordinates = null;
};
ol.inherits(ol.geom.SimpleGeometry, ol.geom.Geometry);
/**
* @param {number} stride Stride.
* @private
* @return {ol.geom.GeometryLayout} layout Layout.
*/
ol.geom.SimpleGeometry.getLayoutForStride_ = function(stride) {
var layout;
if (stride == 2) {
layout = ol.geom.GeometryLayout.XY;
} else if (stride == 3) {
layout = ol.geom.GeometryLayout.XYZ;
} else Eif (stride == 4) {
layout = ol.geom.GeometryLayout.XYZM;
}
return /** @type {ol.geom.GeometryLayout} */ (layout);
};
/**
* @param {ol.geom.GeometryLayout} layout Layout.
* @return {number} Stride.
*/
ol.geom.SimpleGeometry.getStrideForLayout = function(layout) {
var stride;
if (layout == ol.geom.GeometryLayout.XY) {
stride = 2;
} else if (layout == ol.geom.GeometryLayout.XYZ || layout == ol.geom.GeometryLayout.XYM) {
stride = 3;
} else Eif (layout == ol.geom.GeometryLayout.XYZM) {
stride = 4;
}
return /** @type {number} */ (stride);
};
/**
* @inheritDoc
*/
ol.geom.SimpleGeometry.prototype.containsXY = ol.functions.FALSE;
/**
* @inheritDoc
*/
ol.geom.SimpleGeometry.prototype.computeExtent = function(extent) {
return ol.extent.createOrUpdateFromFlatCoordinates(
this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
extent);
};
/**
* @abstract
* @return {Array} Coordinates.
*/
ol.geom.SimpleGeometry.prototype.getCoordinates = function() {};
/**
* Return the first coordinate of the geometry.
* @return {ol.Coordinate} First coordinate.
* @api
*/
ol.geom.SimpleGeometry.prototype.getFirstCoordinate = function() {
return this.flatCoordinates.slice(0, this.stride);
};
/**
* @return {Array.<number>} Flat coordinates.
*/
ol.geom.SimpleGeometry.prototype.getFlatCoordinates = function() {
return this.flatCoordinates;
};
/**
* Return the last coordinate of the geometry.
* @return {ol.Coordinate} Last point.
* @api
*/
ol.geom.SimpleGeometry.prototype.getLastCoordinate = function() {
return this.flatCoordinates.slice(this.flatCoordinates.length - this.stride);
};
/**
* Return the {@link ol.geom.GeometryLayout layout} of the geometry.
* @return {ol.geom.GeometryLayout} Layout.
* @api
*/
ol.geom.SimpleGeometry.prototype.getLayout = function() {
return this.layout;
};
/**
* @inheritDoc
*/
ol.geom.SimpleGeometry.prototype.getSimplifiedGeometry = function(squaredTolerance) {
if (this.simplifiedGeometryRevision != this.getRevision()) {
ol.obj.clear(this.simplifiedGeometryCache);
this.simplifiedGeometryMaxMinSquaredTolerance = 0;
this.simplifiedGeometryRevision = this.getRevision();
}
// If squaredTolerance is negative or if we know that simplification will not
// have any effect then just return this.
if (squaredTolerance < 0 ||
(this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&
squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)) {
return this;
}
var key = squaredTolerance.toString();
if (this.simplifiedGeometryCache.hasOwnProperty(key)) {
return this.simplifiedGeometryCache[key];
} else {
var simplifiedGeometry =
this.getSimplifiedGeometryInternal(squaredTolerance);
var simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();
if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {
this.simplifiedGeometryCache[key] = simplifiedGeometry;
return simplifiedGeometry;
} else {
// Simplification did not actually remove any coordinates. We now know
// that any calls to getSimplifiedGeometry with a squaredTolerance less
// than or equal to the current squaredTolerance will also not have any
// effect. This allows us to short circuit simplification (saving CPU
// cycles) and prevents the cache of simplified geometries from filling
// up with useless identical copies of this geometry (saving memory).
this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;
return this;
}
}
};
/**
* @param {number} squaredTolerance Squared tolerance.
* @return {ol.geom.SimpleGeometry} Simplified geometry.
* @protected
*/
ol.geom.SimpleGeometry.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {
return this;
};
/**
* @return {number} Stride.
*/
ol.geom.SimpleGeometry.prototype.getStride = function() {
return this.stride;
};
/**
* @param {ol.geom.GeometryLayout} layout Layout.
* @param {Array.<number>} flatCoordinates Flat coordinates.
* @protected
*/
ol.geom.SimpleGeometry.prototype.setFlatCoordinatesInternal = function(layout, flatCoordinates) {
this.stride = ol.geom.SimpleGeometry.getStrideForLayout(layout);
this.layout = layout;
this.flatCoordinates = flatCoordinates;
};
/**
* @abstract
* @param {Array} coordinates Coordinates.
* @param {ol.geom.GeometryLayout=} opt_layout Layout.
*/
ol.geom.SimpleGeometry.prototype.setCoordinates = function(coordinates, opt_layout) {};
/**
* @param {ol.geom.GeometryLayout|undefined} layout Layout.
* @param {Array} coordinates Coordinates.
* @param {number} nesting Nesting.
* @protected
*/
ol.geom.SimpleGeometry.prototype.setLayout = function(layout, coordinates, nesting) {
/** @type {number} */
var stride;
if (layout) {
stride = ol.geom.SimpleGeometry.getStrideForLayout(layout);
} else {
var i;
for (i = 0; i < nesting; ++i) {
if (coordinates.length === 0) {
this.layout = ol.geom.GeometryLayout.XY;
this.stride = 2;
return;
} else {
coordinates = /** @type {Array} */ (coordinates[0]);
}
}
stride = coordinates.length;
layout = ol.geom.SimpleGeometry.getLayoutForStride_(stride);
}
this.layout = layout;
this.stride = stride;
};
/**
* @inheritDoc
* @api
*/
ol.geom.SimpleGeometry.prototype.applyTransform = function(transformFn) {
Eif (this.flatCoordinates) {
transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);
this.changed();
}
};
/**
* @inheritDoc
* @api
*/
ol.geom.SimpleGeometry.prototype.rotate = function(angle, anchor) {
var flatCoordinates = this.getFlatCoordinates();
Eif (flatCoordinates) {
var stride = this.getStride();
ol.geom.flat.transform.rotate(
flatCoordinates, 0, flatCoordinates.length,
stride, angle, anchor, flatCoordinates);
this.changed();
}
};
/**
* @inheritDoc
* @api
*/
ol.geom.SimpleGeometry.prototype.scale = function(sx, opt_sy, opt_anchor) {
var sy = opt_sy;
if (sy === undefined) {
sy = sx;
}
var anchor = opt_anchor;
if (!anchor) {
anchor = ol.extent.getCenter(this.getExtent());
}
var flatCoordinates = this.getFlatCoordinates();
Eif (flatCoordinates) {
var stride = this.getStride();
ol.geom.flat.transform.scale(
flatCoordinates, 0, flatCoordinates.length,
stride, sx, sy, anchor, flatCoordinates);
this.changed();
}
};
/**
* @inheritDoc
* @api
*/
ol.geom.SimpleGeometry.prototype.translate = function(deltaX, deltaY) {
var flatCoordinates = this.getFlatCoordinates();
Eif (flatCoordinates) {
var stride = this.getStride();
ol.geom.flat.transform.translate(
flatCoordinates, 0, flatCoordinates.length, stride,
deltaX, deltaY, flatCoordinates);
this.changed();
}
};
/**
* @param {ol.geom.SimpleGeometry} simpleGeometry Simple geometry.
* @param {ol.Transform} transform Transform.
* @param {Array.<number>=} opt_dest Destination.
* @return {Array.<number>} Transformed flat coordinates.
*/
ol.geom.SimpleGeometry.transform2D = function(simpleGeometry, transform, opt_dest) {
var flatCoordinates = simpleGeometry.getFlatCoordinates();
Iif (!flatCoordinates) {
return null;
} else {
var stride = simpleGeometry.getStride();
return ol.geom.flat.transform.transform2D(
flatCoordinates, 0, flatCoordinates.length, stride,
transform, opt_dest);
}
};
|