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- /**
- * Created by Alex on 3/20/2015.
- */
-
- import BaseEdge from './util/baseEdge'
-
- class StraightEdge extends BaseEdge {
- constructor(options, body, labelModule) {
- super(options, body, labelModule);
- }
-
- cleanup() {}
- /**
- * Draw a line between two nodes
- * @param {CanvasRenderingContext2D} ctx
- * @private
- */
- _line(ctx) {
- // draw a straight line
- ctx.beginPath();
- ctx.moveTo(this.from.x, this.from.y);
- ctx.lineTo(this.to.x, this.to.y);
- ctx.stroke();
- return undefined;
- }
-
-
- /**
- * Combined function of pointOnLine and pointOnBezier. This gives the coordinates of a point on the line at a certain percentage of the way
- * @param percentage
- * @param via
- * @returns {{x: number, y: number}}
- * @private
- */
- getPoint(percentage) {
- return {
- x: (1 - percentage) * this.from.x + percentage * this.to.x,
- y: (1 - percentage) * this.from.y + percentage * this.to.y
- }
- }
-
- _findBorderPosition(nearNode, ctx) {
- let node1 = this.to;
- let node2 = this.from;
-
- let angle = Math.atan2((node1.y - node2.y), (node1.x - node2.x));
- let dx = (node1.x - node2.x);
- let dy = (node1.y - node2.y);
- let edgeSegmentLength = Math.sqrt(dx * dx + dy * dy);
- let toBorderDist = nearNode.distanceToBorder(ctx, angle);
- let toBorderPoint = (edgeSegmentLength - toBorderDist) / edgeSegmentLength;
-
- let borderPos = {};
- borderPos.x = (1 - toBorderPoint) * node2.x + toBorderPoint * node1.x;
- borderPos.y = (1 - toBorderPoint) * node2.y + toBorderPoint * node1.y;
-
- return borderPos;
- }
-
- _getDistanceToEdge(x1, y1, x2, y2, x3, y3) { // x3,y3 is the point
- return this._getDistanceToLine(x1, y1, x2, y2, x3, y3);
- }
-
- }
-
- export default StraightEdge;
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