You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
240 lines
7.7 KiB
240 lines
7.7 KiB
/**
|
|
* Created by Alex on 3/20/2015.
|
|
*/
|
|
|
|
import BezierBaseEdge from './util/bezierBaseEdge'
|
|
|
|
class BezierEdgeStatic extends BezierBaseEdge {
|
|
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);
|
|
var via = this._getViaCoordinates();
|
|
|
|
// fallback to normal straight edges
|
|
if (via.x === undefined) {
|
|
ctx.lineTo(this.to.x, this.to.y);
|
|
ctx.stroke();
|
|
return undefined;
|
|
}
|
|
else {
|
|
ctx.quadraticCurveTo(via.x, via.y, this.to.x, this.to.y);
|
|
ctx.stroke();
|
|
return via;
|
|
}
|
|
}
|
|
|
|
_getViaCoordinates() {
|
|
let xVia = undefined;
|
|
let yVia = undefined;
|
|
let factor = this.options.smooth.roundness;
|
|
let type = this.options.smooth.type;
|
|
let dx = Math.abs(this.from.x - this.to.x);
|
|
let dy = Math.abs(this.from.y - this.to.y);
|
|
if (type == 'discrete' || type == 'diagonalCross') {
|
|
if (Math.abs(this.from.x - this.to.x) < Math.abs(this.from.y - this.to.y)) {
|
|
if (this.from.y > this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dy;
|
|
yVia = this.from.y - factor * dy;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dy;
|
|
yVia = this.from.y - factor * dy;
|
|
}
|
|
}
|
|
else if (this.from.y < this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dy;
|
|
yVia = this.from.y + factor * dy;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dy;
|
|
yVia = this.from.y + factor * dy;
|
|
}
|
|
}
|
|
if (type == "discrete") {
|
|
xVia = dx < factor * dy ? this.from.x : xVia;
|
|
}
|
|
}
|
|
else if (Math.abs(this.from.x - this.to.x) > Math.abs(this.from.y - this.to.y)) {
|
|
if (this.from.y > this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dx;
|
|
yVia = this.from.y - factor * dx;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dx;
|
|
yVia = this.from.y - factor * dx;
|
|
}
|
|
}
|
|
else if (this.from.y < this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dx;
|
|
yVia = this.from.y + factor * dx;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dx;
|
|
yVia = this.from.y + factor * dx;
|
|
}
|
|
}
|
|
if (type == "discrete") {
|
|
yVia = dy < factor * dx ? this.from.y : yVia;
|
|
}
|
|
}
|
|
}
|
|
else if (type == "straightCross") {
|
|
if (Math.abs(this.from.x - this.to.x) < Math.abs(this.from.y - this.to.y)) { // up - down
|
|
xVia = this.from.x;
|
|
if (this.from.y < this.to.y) {
|
|
yVia = this.to.y - (1 - factor) * dy;
|
|
}
|
|
else {
|
|
yVia = this.to.y + (1 - factor) * dy;
|
|
}
|
|
}
|
|
else if (Math.abs(this.from.x - this.to.x) > Math.abs(this.from.y - this.to.y)) { // left - right
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.to.x - (1 - factor) * dx;
|
|
}
|
|
else {
|
|
xVia = this.to.x + (1 - factor) * dx;
|
|
}
|
|
yVia = this.from.y;
|
|
}
|
|
}
|
|
else if (type == 'horizontal') {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.to.x - (1 - factor) * dx;
|
|
}
|
|
else {
|
|
xVia = this.to.x + (1 - factor) * dx;
|
|
}
|
|
yVia = this.from.y;
|
|
}
|
|
else if (type == 'vertical') {
|
|
xVia = this.from.x;
|
|
if (this.from.y < this.to.y) {
|
|
yVia = this.to.y - (1 - factor) * dy;
|
|
}
|
|
else {
|
|
yVia = this.to.y + (1 - factor) * dy;
|
|
}
|
|
}
|
|
else if (type == 'curvedCW') {
|
|
dx = this.to.x - this.from.x;
|
|
dy = this.from.y - this.to.y;
|
|
let radius = Math.sqrt(dx * dx + dy * dy);
|
|
let pi = Math.PI;
|
|
|
|
let originalAngle = Math.atan2(dy, dx);
|
|
let myAngle = (originalAngle + ((factor * 0.5) + 0.5) * pi) % (2 * pi);
|
|
|
|
xVia = this.from.x + (factor * 0.5 + 0.5) * radius * Math.sin(myAngle);
|
|
yVia = this.from.y + (factor * 0.5 + 0.5) * radius * Math.cos(myAngle);
|
|
}
|
|
else if (type == 'curvedCCW') {
|
|
dx = this.to.x - this.from.x;
|
|
dy = this.from.y - this.to.y;
|
|
let radius = Math.sqrt(dx * dx + dy * dy);
|
|
let pi = Math.PI;
|
|
|
|
let originalAngle = Math.atan2(dy, dx);
|
|
let myAngle = (originalAngle + ((-factor * 0.5) + 0.5) * pi) % (2 * pi);
|
|
|
|
xVia = this.from.x + (factor * 0.5 + 0.5) * radius * Math.sin(myAngle);
|
|
yVia = this.from.y + (factor * 0.5 + 0.5) * radius * Math.cos(myAngle);
|
|
}
|
|
else { // continuous
|
|
if (Math.abs(this.from.x - this.to.x) < Math.abs(this.from.y - this.to.y)) {
|
|
if (this.from.y > this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dy;
|
|
yVia = this.from.y - factor * dy;
|
|
xVia = this.to.x < xVia ? this.to.x : xVia;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dy;
|
|
yVia = this.from.y - factor * dy;
|
|
xVia = this.to.x > xVia ? this.to.x : xVia;
|
|
}
|
|
}
|
|
else if (this.from.y < this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dy;
|
|
yVia = this.from.y + factor * dy;
|
|
xVia = this.to.x < xVia ? this.to.x : xVia;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dy;
|
|
yVia = this.from.y + factor * dy;
|
|
xVia = this.to.x > xVia ? this.to.x : xVia;
|
|
}
|
|
}
|
|
}
|
|
else if (Math.abs(this.from.x - this.to.x) > Math.abs(this.from.y - this.to.y)) {
|
|
if (this.from.y > this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dx;
|
|
yVia = this.from.y - factor * dx;
|
|
yVia = this.to.y > yVia ? this.to.y : yVia;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dx;
|
|
yVia = this.from.y - factor * dx;
|
|
yVia = this.to.y > yVia ? this.to.y : yVia;
|
|
}
|
|
}
|
|
else if (this.from.y < this.to.y) {
|
|
if (this.from.x < this.to.x) {
|
|
xVia = this.from.x + factor * dx;
|
|
yVia = this.from.y + factor * dx;
|
|
yVia = this.to.y < yVia ? this.to.y : yVia;
|
|
}
|
|
else if (this.from.x > this.to.x) {
|
|
xVia = this.from.x - factor * dx;
|
|
yVia = this.from.y + factor * dx;
|
|
yVia = this.to.y < yVia ? this.to.y : yVia;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return {x: xVia, y: yVia};
|
|
}
|
|
|
|
_findBorderPosition(nearNode, ctx, options) {
|
|
return this._findBorderPositionBezier(nearNode, ctx, options.via);
|
|
}
|
|
|
|
_getDistanceToEdge(x1, y1, x2, y2, x3, y3, via = this._getViaCoordinates()) { // x3,y3 is the point
|
|
return this._getDistanceToBezierEdge(x1, y1, x2, y2, x3, y3, via);
|
|
}
|
|
|
|
/**
|
|
* 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, via = this._getViaCoordinates()) {
|
|
var t = percentage;
|
|
var x = Math.pow(1 - t, 2) * this.from.x + (2 * t * (1 - t)) * via.x + Math.pow(t, 2) * this.to.x;
|
|
var y = Math.pow(1 - t, 2) * this.from.y + (2 * t * (1 - t)) * via.y + Math.pow(t, 2) * this.to.y;
|
|
|
|
return {x: x, y: y};
|
|
}
|
|
}
|
|
|
|
|
|
export default BezierEdgeStatic;
|