85 lines
2.6 KiB
JavaScript
85 lines
2.6 KiB
JavaScript
import { cornerstoneMath } from 'meteor/ohif:cornerstone';
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// Move perpendicular line start point
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export default function(eventData, data) {
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const { distance } = cornerstoneMath.point;
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const { start, end, perpendicularStart, perpendicularEnd } = data.handles;
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const fudgeFactor = 1;
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const fixedPoint = perpendicularEnd;
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const movedPoint = eventData.currentPoints.image;
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const distanceFromFixed = cornerstoneMath.lineSegment.distanceToPoint(data.handles, fixedPoint);
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const distanceFromMoved = cornerstoneMath.lineSegment.distanceToPoint(data.handles, movedPoint);
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const distanceBetweenPoints = distance(fixedPoint, movedPoint);
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const total = distanceFromFixed + distanceFromMoved;
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if (distanceBetweenPoints <= distanceFromFixed) {
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return false;
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}
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const length = distance(start, end);
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if (length === 0) {
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return false;
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}
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const dx = (start.x - end.x) / length;
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const dy = (start.y - end.y) / length;
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const adjustedLineP1 = {
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x: start.x - fudgeFactor * dx,
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y: start.y - fudgeFactor * dy
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};
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const adjustedLineP2 = {
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x: end.x + fudgeFactor * dx,
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y: end.y + fudgeFactor * dy
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};
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perpendicularStart.x = movedPoint.x;
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perpendicularStart.y = movedPoint.y;
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perpendicularEnd.x = movedPoint.x - total * dy;
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perpendicularEnd.y = movedPoint.y + total * dx;
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const longLine = {
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start: {
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x: start.x,
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y: start.y
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},
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end: {
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x: end.x,
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y: end.y
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}
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};
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const perpendicularLine = {
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start: {
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x: perpendicularStart.x,
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y: perpendicularStart.y
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},
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end: {
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x: perpendicularEnd.x,
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y: perpendicularEnd.y
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}
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};
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const intersection = cornerstoneMath.lineSegment.intersectLine(longLine, perpendicularLine);
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if (!intersection) {
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if (distance(movedPoint, start) > distance(movedPoint, end)) {
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perpendicularStart.x = adjustedLineP2.x + distanceFromMoved * dy;
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perpendicularStart.y = adjustedLineP2.y - distanceFromMoved * dx;
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perpendicularEnd.x = perpendicularStart.x - total * dy;
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perpendicularEnd.y = perpendicularStart.y + total * dx;
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} else {
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perpendicularStart.x = adjustedLineP1.x + distanceFromMoved * dy;
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perpendicularStart.y = adjustedLineP1.y - distanceFromMoved * dx;
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perpendicularEnd.x = perpendicularStart.x - total * dy;
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perpendicularEnd.y = perpendicularStart.y + total * dx;
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}
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}
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return true;
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}
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