adding the animation directory
This commit is contained in:
Jidong Xiao
21
animations/lists/iterator/index.html
Normal file
21
animations/lists/iterator/index.html
Normal file
@@ -0,0 +1,21 @@
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>List vs Vector: erase operation, using iterators</title>
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<script src="../../konva.js"></script>
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</head>
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<body>
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<h1>List vs Vector: erase operation, using iterators</h1>
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<p>This animation shows why erasing an element in a vector is more expensive than in a list. Click the "next step" button to run the animation. <b>Note:</b> in this animation, we assume we are going to erase the element which has the value 5.</p>
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<div id="container"></div>
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<script src="iterator.js"></script>
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<!-- we must include the javascript first, and then have this button definition which calls a function defined in the javascript -->
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<button onclick="vec_erase_nextstep()" style="position: absolute; top: 500px; left: 100px;">next step</button>
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<button onclick="list_erase_nextstep()" style="position: absolute; top: 500px; left: 900px;">next step</button>
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</body>
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</html>
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597
animations/lists/iterator/iterator.js
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597
animations/lists/iterator/iterator.js
Normal file
@@ -0,0 +1,597 @@
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// Author: Jidong Xiao
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// first we need to create a stage
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var stage = new Konva.Stage({
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container: 'container', // id of container <div>
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width: 2000,
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height: 1000
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});
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// then create layer
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var layer = new Konva.Layer();
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// add the layer to the stage
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stage.add(layer);
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// the rectangle which contains the vector.
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var rect2 = new Konva.Rect({
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x: 70,
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y: 360,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 650,
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height: 350,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect2);
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// the rectangle which contains the list.
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var rect3 = new Konva.Rect({
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x: 850,
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y: 360,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 900,
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height: 300,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect3);
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// Create a function to draw vector nodes
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function drawVecNode(x, y, label, id){
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// the rectangle represents list nodes.
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let rect1 = new Konva.Rect({
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x: x,
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y: y,
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id:"node_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 100,
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height: 50,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect1);
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var text = new Konva.Text({
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x: x + 45,
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y: y + 20,
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text: label,
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id: "node_text_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text);
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var text1 = new Konva.Text({
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x: x + 45,
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y: y + 60,
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text: id - 1,
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id: "node_index_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text1);
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}
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drawVecNode(100, 460, '7', 1);
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drawVecNode(200, 460, '5', 2);
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drawVecNode(300, 460, '8', 3);
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drawVecNode(400, 460, '1', 4);
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drawVecNode(500, 460, '9', 5);
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// Create a function to draw list nodes
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function drawListNode(x, y, label, id){
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// the rectangle represents list nodes.
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let rect1 = new Konva.Rect({
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x: x,
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y: y,
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id:"list_node_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 100,
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height: 50,
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});
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layer.add(rect1);
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let rect2 = new Konva.Rect({
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x: x+100,
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y: y,
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id:"list_node_pointer_rec_" + id,
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 20,
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height: 50,
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});
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layer.add(rect2);
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var text = new Konva.Text({
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x: x + 45,
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y: y + 20,
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text: label,
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id: "list_node_text_" + id,
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text);
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var arrow = new Konva.Arrow({
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points: [x+110, y+25, x+150, y+25],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: "list_arrow_" + id,
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fill: 'green',
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stroke: 'green',
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strokeWidth: 5,
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});
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layer.add(arrow);
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}
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drawListNode(900, 460, '7', 1);
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drawListNode(1050, 460, '5', 2);
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drawListNode(1200, 460, '8', 3);
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drawListNode(1350, 460, '1', 4);
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drawListNode(1500, 460, '9', 4);
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var text_null = new Konva.Text({
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x: 1655,
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y: 475,
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text: "NULL",
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id: "node_text_null",
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fontSize: 20,
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fontFamily: 'Calibri',
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fill: 'black'
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});
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layer.add(text_null);
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var text_itr = new Konva.Text({
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x: 235,
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y: 640,
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text: "itr",
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id: 'vec_itr_1',
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fontSize: 26,
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fontFamily: 'Calibri',
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fill: '#17202a'
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});
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var itr_arrow = new Konva.Arrow({
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points: [250, 625, 250, 555],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: 'itr_arrow_1',
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fill: 'green',
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stroke: 'green',
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strokeWidth: 5,
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});
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var pts = itr_arrow.points();
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var text_itr2 = new Konva.Text({
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x: 235,
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y: 640,
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text: "itr2",
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id: 'vec_itr_2',
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fontSize: 26,
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fontFamily: 'Calibri',
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fill: '#17202a'
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});
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var itr2_arrow = new Konva.Arrow({
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points: [250, 625, 250, 555],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: 'itr_arrow_2',
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fill: 'yellow',
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stroke: 'yellow',
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strokeWidth: 5,
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});
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var pts2 = itr2_arrow.points();
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var text_p = new Konva.Text({
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x: 1100,
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y: 610,
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text: "p",
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id: 'list_itr_p',
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fontSize: 26,
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fontFamily: 'Calibri',
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fill: '#17202a'
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});
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var arrow_p = new Konva.Arrow({
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points: [1100, 605, 1100, 535],
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tension: 0.5,
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pointerLength: 10,
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pointerWidth: 10,
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id: 'arrow_p',
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fill: 'yellow',
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stroke: 'yellow',
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strokeWidth: 5,
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});
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// the code rectangle.
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var rect1 = new Konva.Rect({
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x: 70,
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y: 60,
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id:"code_rec1",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 650,
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height: 250,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect1);
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// the code rectangle.
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var rect_list = new Konva.Rect({
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x: 850,
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y: 60,
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id:"code_rec_list",
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stroke: '#555',
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strokeWidth: 5,
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fill: '#ddd',
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width: 650,
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height: 250,
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shadowColor: 'black',
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shadowBlur: 10,
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shadowOffsetX: 10,
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shadowOffsetY: 10,
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shadowOpacity: 0.2,
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cornerRadius: 10,
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});
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layer.add(rect_list);
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function makeCode(x,y,str,id) {
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return new Konva.Text({
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x: x,
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y: y,
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text: str,
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id: 'line'+id,
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fontSize: 18,
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fontFamily: 'Calibri',
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fill: '#000000',
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width: 650,
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padding: 20,
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});
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}
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var code=[
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"0. void erase_from_vector(vector<int>::iterator itr, vector<int>& v) {",
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"1. \t\t\t vector<int>::iterator itr2 = itr;",
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"2. \t\t\t itr2++;",
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"3. \t\t\t while (itr2 != v.end()) {",
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"4. \t\t\t \t\t\t *itr = *itr2;",
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"5. \t\t\t \t\t\t itr++;",
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"6. \t\t\t \t\t\t itr2++;",
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"7. \t\t\t }",
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"8. \t\t\t v.pop_back();",
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"9. }",
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];
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function makeBold(id){
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for(let i=1; i<=code.length; i++){
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if(i!=id){
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stage.find('#line'+i).fontStyle('normal');
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}else{
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stage.find('#line'+id).fontStyle('bold');
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}
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}
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}
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// write the code fragment into the code box.
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for (let i=0;i<code.length;i++){
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// the array starts from index 0, but we want ids to be counted from index 1.
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let t=makeCode(80,60+(i*20),code[i],i+1);
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layer.add(t);
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}
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var code_list=[
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"0. std::list<int> s;",
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"1. std::list<int>::iterator p; // code initializing p is omitted",
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"2. p = s.erase(p);",
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];
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function makeBold_list(id){
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for(let i=1; i<=code_list.length; i++){
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if(i!=id){
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// regarding the parentheses, we must add the two numbers first.
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stage.find('#line'+(i+100)).fontStyle('normal');
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}else{
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stage.find('#line'+(i+100)).fontStyle('bold');
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}
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}
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}
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// write the code fragment into the code box.
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for (let i=0;i<code_list.length;i++){
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// the array starts from index 0, but we want ids to be counted from index 1.
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// here we add 100 so as to differentiate from the code array.
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let t=makeCode(860,60+(i*20),code_list[i],i+1+100);
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layer.add(t);
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}
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function increment_itr1() {
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text_itr.x(text_itr.getX()+100);
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pts[0] = pts[0] + 100;
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pts[2] = pts[2] + 100;
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itr_arrow.points(pts);
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}
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function increment_itr2() {
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text_itr2.x(text_itr2.getX()+100);
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pts2[0] = pts2[0] + 100;
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pts2[2] = pts2[2] + 100;
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itr2_arrow.points(pts2);
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}
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// draw the image
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layer.draw();
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stage.add(layer);
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var pc=1;
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// erase 5 from this vector.
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function vec_erase_nextstep() {
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if(pc == 1){
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makeBold(pc);
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layer.add(text_itr);
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layer.add(itr_arrow);
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layer.draw();
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pc=pc+1;
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}else if(pc == 2){
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makeBold(pc);
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layer.add(text_itr2);
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layer.add(itr2_arrow);
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layer.draw();
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pc=pc+1;
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}else if(pc == 3){
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makeBold(pc);
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increment_itr2();
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layer.draw();
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pc=pc+1;
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}else if(pc == 4){
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makeBold(4);
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// highlight the one we are going to erase.
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stage.find('#node_rec_2').fill('#f4d03f');
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layer.draw();
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pc=pc+1;
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}else if(pc == 5){
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makeBold(5);
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stage.find('#node_text_2').text('8');
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layer.draw();
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pc=pc+1;
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}else if(pc == 6){
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makeBold(6);
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increment_itr1();
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layer.draw();
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pc=pc+1;
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}else if(pc == 7){
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makeBold(7);
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increment_itr2();
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layer.draw();
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pc=pc+1;
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}else if(pc == 8){
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makeBold(8);
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layer.draw();
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pc=pc+1;
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}else if(pc == 9){
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makeBold(4);
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// highlight the one we are going to update.
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stage.find('#node_rec_3').fill('#f4d03f');
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// and restore the previous one.
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||||
stage.find('#node_rec_2').fill('#ddd');
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 10){
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||||
makeBold(5);
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||||
stage.find('#node_text_3').text('1');
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 11){
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||||
makeBold(6);
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||||
increment_itr1();
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 12){
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||||
makeBold(7);
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||||
increment_itr2();
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 13){
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||||
makeBold(8);
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||||
layer.draw();
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||||
pc=pc+1;
|
||||
}else if(pc == 14){
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||||
makeBold(4);
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||||
// highlight the one we are going to update.
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||||
stage.find('#node_rec_4').fill('#f4d03f');
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||||
// and restore the previous one.
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||||
stage.find('#node_rec_3').fill('#ddd');
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 15){
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||||
makeBold(5);
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||||
stage.find('#node_text_4').text('9');
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 16){
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||||
makeBold(6);
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||||
increment_itr1();
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||||
layer.draw();
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||||
pc=pc+1;
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||||
}else if(pc == 17){
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||||
makeBold(7);
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||||
increment_itr2();
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||||
layer.draw();
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||||
pc=pc+1;
|
||||
}else if(pc == 18){
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||||
makeBold(8);
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 19){
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||||
makeBold(4);
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||||
// highlight the one we are going to update.
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||||
stage.find('#node_rec_5').fill('#f4d03f');
|
||||
// and restore the previous one.
|
||||
stage.find('#node_rec_4').fill('#ddd');
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 20){
|
||||
makeBold(8);
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 21){
|
||||
makeBold(9);
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 22){
|
||||
var shape = stage.find('#node_rec_5');
|
||||
// let this object disappear in 2 seconds.
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
//stage.find('#node_rec_5').destroy();
|
||||
shape = stage.find('#node_text_5');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
//stage.find('#node_text_5').destroy();
|
||||
shape = stage.find('#node_index_5');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
//stage.find('#node_index_5').destroy();
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 23){
|
||||
makeBold(10);
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}else if(pc == 24){
|
||||
alert("End of animation! Refresh the page if you want to re-run the animation.");
|
||||
layer.draw();
|
||||
pc=pc+1;
|
||||
}
|
||||
}
|
||||
|
||||
var targetPoints = [1010, 485, 1100, 585, 1200, 485];
|
||||
var arrow1 = new Konva.Arrow({
|
||||
points: [1010, 485, 1030, 485, 1050, 485],
|
||||
tension: 0.5,
|
||||
pointerLength: 10,
|
||||
pointerWidth: 10,
|
||||
id: "arrow1",
|
||||
fill: 'green',
|
||||
stroke: 'green',
|
||||
strokeWidth: 5,
|
||||
});
|
||||
|
||||
layer.add(arrow1);
|
||||
layer.draw();
|
||||
var arrow2 = stage.find('#arrow1');
|
||||
|
||||
// Create the animation
|
||||
var tween = new Konva.Tween({
|
||||
node: arrow2,
|
||||
points: targetPoints,
|
||||
duration: 2, // animation duration in seconds
|
||||
easing: Konva.Easings.Linear
|
||||
});
|
||||
|
||||
var pts_p = arrow_p.points();
|
||||
function increment_p() {
|
||||
text_p.x(text_p.getX()+160);
|
||||
pts_p[0] = pts_p[0] + 160;
|
||||
pts_p[2] = pts_p[2] + 160;
|
||||
itr2_arrow.points(pts_p);
|
||||
}
|
||||
|
||||
var pc2=1;
|
||||
// erase 5 from this list.
|
||||
function list_erase_nextstep() {
|
||||
if(pc2 == 1){
|
||||
makeBold_list(1);
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
}else if(pc2 == 2){
|
||||
makeBold_list(2);
|
||||
layer.add(text_p);
|
||||
layer.add(arrow_p);
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
}else if(pc2 == 3){
|
||||
makeBold_list(3);
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
}else if(pc2 == 4){
|
||||
stage.find('#list_arrow_1').destroy();
|
||||
// start the animation
|
||||
tween.play();
|
||||
//layer.add(arrow1);
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
}else if(pc2 == 5){
|
||||
makeBold_list(-1);
|
||||
var shape = stage.find('#list_arrow_2');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
shape = stage.find('#list_node_rec_2');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
shape = stage.find('#list_node_pointer_rec_2');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
shape = stage.find('#list_node_text_2');
|
||||
shape.to({
|
||||
opacity: 0,
|
||||
duration: 2,
|
||||
});
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
increment_p();
|
||||
layer.draw();
|
||||
}else if(pc2 == 6){
|
||||
alert("End of animation! Refresh the page if you want to re-run the animation.");
|
||||
layer.draw();
|
||||
pc2=pc2+1;
|
||||
}
|
||||
}
|
||||
|
||||
/* vim: set ts=4: */
|
||||
Reference in New Issue
Block a user