GradientStop & PathItem example documentation.

This commit is contained in:
Jonathan Puckey 2013-03-03 19:47:32 +01:00
parent cd94ecd7ca
commit 3cdb11fe36
2 changed files with 45 additions and 21 deletions

View file

@ -22,7 +22,7 @@ var GradientStop = this.GradientStop = Base.extend(/** @lends GradientStop# */{
* *
* @param {Color} [color=new RgbColor(0, 0, 0)] the color of the stop * @param {Color} [color=new RgbColor(0, 0, 0)] the color of the stop
* @param {Number} [rampPoint=0] the position of the stop on the gradient * @param {Number} [rampPoint=0] the position of the stop on the gradient
* ramp {@default 0} * ramp as a value between 0 and 1.
*/ */
initialize: function(arg0, arg1) { initialize: function(arg0, arg1) {
if (arg0) { if (arg0) {
@ -82,22 +82,26 @@ var GradientStop = this.GradientStop = Base.extend(/** @lends GradientStop# */{
* // Create a circle shaped path at the center of the view, * // Create a circle shaped path at the center of the view,
* // using 40% of the height of the view as its radius * // using 40% of the height of the view as its radius
* // and fill it with a radial gradient color: * // and fill it with a radial gradient color:
* var path = new Path.Circle(view.center, view.bounds.height * 0.4); * var path = new Path.Circle({
* * center: view.center,
* radius: view.bounds.height * 0.4
* });
*
* // Prepare the gradient color and apply it to the path: * // Prepare the gradient color and apply it to the path:
* var colors = [['yellow', 0.05], ['red', 0.2], ['black', 1]]; * var colors = [['yellow', 0.05], ['red', 0.2], ['black', 1]];
* var gradient = new RadialGradient(colors); * var gradient = new RadialGradient(colors);
* var from = path.position; * var from = path.position;
* var to = path.bounds.rightCenter; * var to = path.bounds.rightCenter;
* var gradientColor = new GradientColor(gradient, from, to); * var gradientColor = new GradientColor(gradient, from, to);
*
* path.fillColor = gradientColor; * path.fillColor = gradientColor;
* *
* // This function is called each frame of the animation: * // This function is called each frame of the animation:
* function onFrame(event) { * function onFrame(event) {
* var blackStop = gradient.stops[2]; * var blackStop = gradient.stops[2];
* // Animate the rampPoint between 0.7 and 0.9: * // Animate the rampPoint between 0.7 and 0.9:
* blackStop.rampPoint = Math.sin(event.time * 5) * 0.1 + 0.8; * blackStop.rampPoint = Math.sin(event.time * 5) * 0.1 + 0.8;
* *
* // Animate the rampPoint between 0.2 and 0.4 * // Animate the rampPoint between 0.2 and 0.4
* var redStop = gradient.stops[1]; * var redStop = gradient.stops[1];
* redStop.rampPoint = Math.sin(event.time * 3) * 0.1 + 0.3; * redStop.rampPoint = Math.sin(event.time * 3) * 0.1 + 0.3;
@ -125,7 +129,10 @@ var GradientStop = this.GradientStop = Base.extend(/** @lends GradientStop# */{
* // Create a circle shaped path at the center of the view, * // Create a circle shaped path at the center of the view,
* // using 40% of the height of the view as its radius * // using 40% of the height of the view as its radius
* // and fill it with a radial gradient color: * // and fill it with a radial gradient color:
* var path = new Path.Circle(view.center, view.bounds.height * 0.4); * var path = new Path.Circle({
* center: view.center,
* radius: view.bounds.height * 0.4
* });
* *
* // Create a radial gradient that mixes red and black evenly: * // Create a radial gradient that mixes red and black evenly:
* var gradient = new RadialGradient('red', 'black'); * var gradient = new RadialGradient('red', 'black');

View file

@ -22,13 +22,37 @@
var PathItem = this.PathItem = Item.extend(/** @lends PathItem# */{ var PathItem = this.PathItem = Item.extend(/** @lends PathItem# */{
/** /**
* Returns all interesections between two {@link PathItem} items as an array * Returns all intersections between two {@link PathItem} items as an array
* of {@link CurveLocation} objects. {@link CompoundPath} items are also * of {@link CurveLocation} objects. {@link CompoundPath} items are also
* supported. * supported.
* *
* @param {PathItem} the other item to find the intersections to. * @param {PathItem} path the other item to find the intersections to.
* @return {CurveLocation[]} the locations of all intersection between the * @return {CurveLocation[]} the locations of all intersection between the
* paths * paths
* @example {@paperscript}
* // Create a rectangular path with its top-left point at
* // {x: 30, y: 25} and a size of {width: 50, height: 50}:
* var path = new Path.Rectangle(new Point(30, 25), new Size(50, 50));
* path.strokeColor = 'black';
*
* var secondPath = path.clone();
* var intersectionGroup = new Group();
*
* function onFrame(event) {
* secondPath.rotate(3);
*
* var intersections = path.getIntersections(secondPath);
* intersectionGroup.removeChildren();
*
* for (var i = 0; i < intersections.length; i++) {
* var intersectionPath = new Path.Circle({
* center: intersections[i].point,
* radius: 4,
* fillColor: 'red'
* });
* intersectionGroup.addChild(intersectionPath);
* }
* }
*/ */
getIntersections: function(path) { getIntersections: function(path) {
// First check the bounds of the two paths. If they don't intersect, // First check the bounds of the two paths. If they don't intersect,
@ -242,34 +266,27 @@ var PathItem = this.PathItem = Item.extend(/** @lends PathItem# */{
* @param {Number} [parameter=0.5] * @param {Number} [parameter=0.5]
* *
* @example {@paperscript height=300} * @example {@paperscript height=300}
* // Interactive example. Click and drag in the view below: * // Interactive example. Move your mouse around the view below:
* *
* var myPath; * var myPath;
* function onMouseDrag(event) { * function onMouseMove(event) {
* // If we created a path before, remove it: * // If we created a path before, remove it:
* if (myPath) { * if (myPath) {
* myPath.remove(); * myPath.remove();
* } * }
* *
* // Create a new path and add a segment point to it * // Create a new path and add a segment point to it
* // at {x: 150, y: 150): * // at {x: 150, y: 150):
* myPath = new Path(); * myPath = new Path();
* myPath.add(150, 150); * myPath.add(150, 150);
* *
* // Draw a curve through the position of the mouse to 'toPoint' * // Draw a curve through the position of the mouse to 'toPoint'
* var toPoint = new Point(350, 150); * var toPoint = new Point(350, 150);
* myPath.curveTo(event.point, toPoint); * myPath.curveTo(event.point, toPoint);
* *
* // Select the path, so we can see its segments: * // Select the path, so we can see its segments:
* myPath.selected = true; * myPath.selected = true;
* } * }
*
* // When the mouse is released, deselect the path
* // and set its stroke-color to black:
* function onMouseUp(event) {
* myPath.selected = false;
* myPath.strokeColor = 'black';
* }
*/ */
/** /**