JS繪制圖形庫 VivaGraphJS

jopen 12年前發布 | 48K 次閱讀 JS 圖形/圖像處理

VivaGraphJS 是一個 JavaScript 庫，用來在網頁上進行圖形繪制。旨在擴展和支持不同的渲染引擎和布局算法，當前支持通過 SVG 和 CSS 進行圖形渲染。布局算法已經實現了：

Force Directed - based on Barnes-Hut simulation and optimized for JavaScript language this algorithm gives N * lg(N) + V performance per iteration.
GEM - Graph Embedder algorithm created by Arne Frick, Andreas Ludwig and Heiko Mehldau. Estimated compleixity of this algorithm is O(|V|^3) - though I must have made a mistake somewhere, because force directed algorithm almost always produces better results faster. This algorithm is included to demonstrate how one can implement a new layout algorithm.

JS繪制圖形庫 VivaGraphJS

示例代碼：

var graph = Viva.Graph.graph();

// Construct the graph
graph.addNode('anvaka', {url : 'https://secure.gravatar.com/avatar/91bad8ceeec43ae303790f8fe238164b'});
graph.addNode('manunt', {url : 'https://secure.gravatar.com/avatar/c81bfc2cf23958504617dd4fada3afa8'});
graph.addNode('thlorenz', {url : 'https://secure.gravatar.com/avatar/1c9054d6242bffd5fd25ec652a2b79cc'});
graph.addNode('bling', {url : 'https://secure.gravatar.com/avatar/24a5b6e62e9a486743a71e0a0a4f71af'});
graph.addNode('diyan', {url : 'https://secure.gravatar.com/avatar/01bce7702975191fdc402565bd1045a8?'});
graph.addNode('pocheptsov', {url : 'https://secure.gravatar.com/avatar/13da974fc9716b42f5d62e3c8056c718'});
graph.addNode('dimapasko', {url : 'https://secure.gravatar.com/avatar/8e587a4232502a9f1ca14e2810e3c3dd'});

graph.addLink('anvaka', 'manunt');
graph.addLink('anvaka', 'thlorenz');
graph.addLink('anvaka', 'bling');
graph.addLink('anvaka', 'diyan');
graph.addLink('anvaka', 'pocheptsov');
graph.addLink('anvaka', 'dimapasko');

// Set custom nodes appearance
var graphics = Viva.Graph.View.svgGraphics();
graphics.node(function(node) {
       // The function is called every time renderer needs a ui to display node
       return Viva.Graph.svg('image')
             .attr('width', 24)
             .attr('height', 24)
             .link(node.data.url); // node.data holds custom object passed to graph.addNode();
    })
    .placeNode(function(nodeUI, pos){
        // Shift image to let links go to the center:
        nodeUI.attr('x', pos.x - 12).attr('y', pos.y - 12);
    });

var renderer = Viva.Graph.View.renderer(graph, 
    {
        graphics : graphics
    });
renderer.run();

JS繪制圖形庫 VivaGraphJS