auto: 2026-08-29 17:09 (EOMSANGDON-HOME)

B07_DesignDetail/openwebcad/src/drawControllers/screenCanvas.drawController.ts

@@ -1,5 +1,5 @@
 import { Point, type Vector } from '@flatten-js/core';
-import { MOUSE_ZOOM_MULTIPLIER } from '../App.consts';
+import { WHEEL_ZOOM_EXPONENT } from '../App.consts';
 import { getAngleWithXAxis } from '../helpers/get-angle-with-x-axis.ts';
 import { getBoundingBoxOfMultipleEntities } from '../helpers/get-bounding-box-of-multiple-entities.ts';
 import { mapNumberRange } from '../helpers/map-number-range.ts';
@@ -107,13 +107,14 @@ export class ScreenCanvasDrawController implements DrawController {
 	 * This function takes the deltaY from the mouse wheel event and zooms the screen in or out
 	 * The location of the mouse in world space is preserved
 	 * @param deltaY
+	 * @param exponent 델타 한 단위당 확대 지수 (휠·핀치가 서로 다른 값을 쓴다)
 	 */
-	public zoomScreen(deltaY: number) {
+	public zoomScreen(deltaY: number, exponent: number = WHEEL_ZOOM_EXPONENT) {
 		const worldMouseLocationBeforeZoom = this.getWorldMouseLocation();
 		const oldScreenScale = this.getScreenScale();
 
-		const newScreenScale =
-			oldScreenScale * (1 - MOUSE_ZOOM_MULTIPLIER * (deltaY / Math.abs(deltaY)));
+		// 부호가 아니라 크기까지 본다 — 트랙패드의 잔 델타는 그만큼만 움직인다.
+		const newScreenScale = oldScreenScale * Math.exp(-deltaY * exponent);
 		this.setScreenScale(newScreenScale);
 
 		// now get the location of the cursor in world space again