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task(B3): offset respects click side (fixes BUG-3)

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Agent Zero
2026-08-26 13:51:02 +02:00
parent 95b14cf86b
commit d8f29e42e3
3 changed files with 61 additions and 7 deletions
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frontend/src/tools/modification/geometry.ts
+12 -5
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@@ -163,7 +163,14 @@ export function mirrorElement(el: CADElement, x1: number, y1: number, x2: number
* Offset element by a distance (creates a parallel copy).
* For lines: offset perpendicular. For circles/arcs: adjust radius.
*/
export function offsetElement(el: CADElement, distance: number): CADElement {
/**
* Versetzt ein Element senkrecht zur seiner Richtung.
* @param distance positiver Betrag des Versatzes
* @param side 1 = links der Laufrichtung (Standard), -1 = rechts —
* bei circle/arc: 1 = Radius vergrößern, -1 = verkleinern
*/
export function offsetElement(el: CADElement, distance: number, side?: 1 | -1): CADElement {
const signed = distance * (side ?? 1);
const props = { ...el.properties };
if (el.type === 'line' && props.x1 !== undefined && props.y1 !== undefined && props.x2 !== undefined && props.y2 !== undefined) {
@@ -174,8 +181,8 @@ export function offsetElement(el: CADElement, distance: number): CADElement {
// Perpendicular unit vector
const nx = -dy / len;
const ny = dx / len;
const ox = nx * distance;
const oy = ny * distance;
const ox = nx * signed;
const oy = ny * signed;
props.x1 += ox;
props.y1 += oy;
props.x2 += ox;
@@ -184,7 +191,7 @@ export function offsetElement(el: CADElement, distance: number): CADElement {
}
if ((el.type === 'circle' || el.type === 'arc') && props.radius !== undefined) {
props.radius = Math.abs(props.radius + distance);
props.radius = Math.abs(props.radius + signed);
const d = props.radius * 2;
return { ...el, width: d, height: d, properties: props };
}
@@ -201,7 +208,7 @@ export function offsetElement(el: CADElement, distance: number): CADElement {
if (len === 0) return p;
const nx = -dy / len;
const ny = dx / len;
return { x: p.x + nx * distance, y: p.y + ny * distance };
return { x: p.x + nx * signed, y: p.y + ny * signed };
});
return { ...el, properties: props };
}