16 lines
674 B
JavaScript
16 lines
674 B
JavaScript
import { Vector, Utils as CALUtils } from '@doodle3d/cal';
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import { MIN_ZOOM, MAX_ZOOM, CANVAS_SIZE } from '../../constants/d2Constants.js';
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export default function constrainMatrix(matrix) {
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const scale = matrix.sx;
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const scaleClamped = CALUtils.MathExtended.clamb(scale, MIN_ZOOM, MAX_ZOOM);
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matrix.scale = scaleClamped;
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const pan = new Vector().copy(matrix).scale(scaleClamped / scale);
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const maxTranslate = (CANVAS_SIZE / MIN_ZOOM - CANVAS_SIZE / scaleClamped) * scaleClamped;
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matrix.x = CALUtils.MathExtended.clamb(pan.x, -maxTranslate, maxTranslate);
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matrix.y = CALUtils.MathExtended.clamb(pan.y, -maxTranslate, maxTranslate);
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matrix.rotation = 0;
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}
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