diff options
Diffstat (limited to 'src/client/util/InteractionUtils.tsx')
| -rw-r--r-- | src/client/util/InteractionUtils.tsx | 126 |
1 files changed, 124 insertions, 2 deletions
diff --git a/src/client/util/InteractionUtils.tsx b/src/client/util/InteractionUtils.tsx index 3a5345c80..3948611f0 100644 --- a/src/client/util/InteractionUtils.tsx +++ b/src/client/util/InteractionUtils.tsx @@ -1,4 +1,6 @@ import React = require("react"); +import * as beziercurve from 'bezier-curve'; +import * as fitCurve from 'fit-curve'; export namespace InteractionUtils { export const MOUSETYPE = "mouse"; @@ -87,8 +89,33 @@ export namespace InteractionUtils { return myTouches; } - export function CreatePolyline(points: { X: number, Y: number }[], left: number, top: number, color: string, width: string) { - const pts = points.reduce((acc: string, pt: { X: number, Y: number }) => acc + `${pt.X - left},${pt.Y - top} `, ""); + export function CreatePolyline(points: { X: number, Y: number }[], left: number, top: number, color: string, width: string, bezier: string, scalex: number, scaley: number, shape: string) { + var pts = ""; + if (shape) { + //if any of the shape are true + const shapePts = makePolygon(shape, points); + pts = shapePts.reduce((acc: string, pt: { X: number, Y: number }) => acc + `${pt.X * scalex - left * scalex},${pt.Y * scaley - top * scaley} `, ""); + } + else if (points.length > 1 && points[points.length - 1].X === points[0].X && points[points.length - 1].Y === points[0].Y) { + //pointer is up (first and last points are the same) + const newPoints: number[][] = []; + const newPts: { X: number; Y: number; }[] = []; + //convert to [][] for fitcurve module + for (var i = 0; i < points.length - 1; i++) { + newPoints.push([points[i].X, points[i].Y]); + } + const bezierCurves = fitCurve(newPoints, parseInt(bezier)); + for (var i = 0; i < bezierCurves.length; i++) { + for (var t = 0; t < 1; t += 0.01) { + const point = beziercurve(t, bezierCurves[i]); + newPts.push({ X: point[0], Y: point[1] }); + } + } + pts = newPts.reduce((acc: string, pt: { X: number, Y: number }) => acc + `${pt.X * scalex - left * scalex},${pt.Y * scaley - top * scaley} `, ""); + } else { + //in the middle of drawing + pts = points.reduce((acc: string, pt: { X: number, Y: number }) => acc + `${pt.X * scalex - left * scalex},${pt.Y * scaley - top * scaley} `, ""); + } return ( <polyline points={pts} @@ -103,6 +130,101 @@ export namespace InteractionUtils { ); } + export function makePolygon(shape: string, points: { X: number, Y: number }[]) { + if (points.length > 1 && points[points.length - 1].X === points[0].X && points[points.length - 1].Y + 1 === points[0].Y) { + //pointer is up (first and last points are the same) + if (shape === "arrow" || shape === "line") { + //if arrow or line, the two end points should be the starting and the ending point + var left = points[0].X; + var top = points[0].Y; + var right = points[1].X; + var bottom = points[1].Y; + } else { + //otherwise take max and min + const xs = points.map(p => p.X); + const ys = points.map(p => p.Y); + right = Math.max(...xs); + left = Math.min(...xs); + bottom = Math.max(...ys); + top = Math.min(...ys); + } + } else { + //if in the middle of drawing + //take first and last points + right = points[points.length - 1].X; + left = points[0].X; + bottom = points[points.length - 1].Y; + top = points[0].Y; + if (shape !== "arrow" && shape !== "line") { + //switch left/right and top/bottom if needed + if (left > right) { + const temp = right; + right = left; + left = temp; + } + if (top > bottom) { + const temp = top; + top = bottom; + bottom = temp; + } + } + } + points = []; + switch (shape) { + case "rectangle": + points.push({ X: left, Y: top }); + points.push({ X: right, Y: top }); + points.push({ X: right, Y: bottom }); + points.push({ X: left, Y: bottom }); + points.push({ X: left, Y: top }); + return points; + case "triangle": + points.push({ X: left, Y: bottom }); + points.push({ X: right, Y: bottom }); + points.push({ X: (right + left) / 2, Y: top }); + points.push({ X: left, Y: bottom }); + return points; + case "circle": + const centerX = (right + left) / 2; + const centerY = (bottom + top) / 2; + const radius = bottom - centerY; + for (var y = top; y < bottom; y++) { + const x = Math.sqrt(Math.pow(radius, 2) - (Math.pow((y - centerY), 2))) + centerX; + points.push({ X: x, Y: y }); + } + for (var y = bottom; y > top; y--) { + const x = Math.sqrt(Math.pow(radius, 2) - (Math.pow((y - centerY), 2))) + centerX; + const newX = centerX - (x - centerX); + points.push({ X: newX, Y: y }); + } + points.push({ X: Math.sqrt(Math.pow(radius, 2) - (Math.pow((top - centerY), 2))) + centerX, Y: top }); + return points; + case "arrow": + const x1 = left; + const y1 = top; + const x2 = right; + const y2 = bottom; + const L1 = Math.sqrt(Math.pow(Math.abs(x1 - x2), 2) + (Math.pow(Math.abs(y1 - y2), 2))); + const L2 = L1 / 5; + const angle = 0.785398; + const x3 = x2 + (L2 / L1) * ((x1 - x2) * Math.cos(angle) + (y1 - y2) * Math.sin(angle)); + const y3 = y2 + (L2 / L1) * ((y1 - y2) * Math.cos(angle) - (x1 - x2) * Math.sin(angle)); + const x4 = x2 + (L2 / L1) * ((x1 - x2) * Math.cos(angle) - (y1 - y2) * Math.sin(angle)); + const y4 = y2 + (L2 / L1) * ((y1 - y2) * Math.cos(angle) + (x1 - x2) * Math.sin(angle)); + points.push({ X: x1, Y: y1 }); + points.push({ X: x2, Y: y2 }); + points.push({ X: x3, Y: y3 }); + points.push({ X: x4, Y: y4 }); + points.push({ X: x2, Y: y2 }); + return points; + case "line": + points.push({ X: left, Y: top }); + points.push({ X: right, Y: bottom }); + return points; + default: + return points; + } + } /** * Returns whether or not the pointer event passed in is of the type passed in * @param e - pointer event. this event could be from a mouse, a pen, or a finger |