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53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
import { mixNumber } from 'motion-dom';
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const SCALE_PRECISION = 0.0001;
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const SCALE_MIN = 1 - SCALE_PRECISION;
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const SCALE_MAX = 1 + SCALE_PRECISION;
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const TRANSLATE_PRECISION = 0.01;
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const TRANSLATE_MIN = 0 - TRANSLATE_PRECISION;
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const TRANSLATE_MAX = 0 + TRANSLATE_PRECISION;
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function calcLength(axis) {
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return axis.max - axis.min;
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}
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function isNear(value, target, maxDistance) {
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return Math.abs(value - target) <= maxDistance;
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}
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function calcAxisDelta(delta, source, target, origin = 0.5) {
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delta.origin = origin;
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delta.originPoint = mixNumber(source.min, source.max, delta.origin);
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delta.scale = calcLength(target) / calcLength(source);
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delta.translate =
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mixNumber(target.min, target.max, delta.origin) - delta.originPoint;
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if ((delta.scale >= SCALE_MIN && delta.scale <= SCALE_MAX) ||
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isNaN(delta.scale)) {
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delta.scale = 1.0;
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}
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if ((delta.translate >= TRANSLATE_MIN &&
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delta.translate <= TRANSLATE_MAX) ||
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isNaN(delta.translate)) {
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delta.translate = 0.0;
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}
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}
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function calcBoxDelta(delta, source, target, origin) {
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calcAxisDelta(delta.x, source.x, target.x, origin ? origin.originX : undefined);
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calcAxisDelta(delta.y, source.y, target.y, origin ? origin.originY : undefined);
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}
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function calcRelativeAxis(target, relative, parent) {
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target.min = parent.min + relative.min;
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target.max = target.min + calcLength(relative);
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}
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function calcRelativeBox(target, relative, parent) {
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calcRelativeAxis(target.x, relative.x, parent.x);
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calcRelativeAxis(target.y, relative.y, parent.y);
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}
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function calcRelativeAxisPosition(target, layout, parent) {
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target.min = layout.min - parent.min;
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target.max = target.min + calcLength(layout);
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}
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function calcRelativePosition(target, layout, parent) {
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calcRelativeAxisPosition(target.x, layout.x, parent.x);
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calcRelativeAxisPosition(target.y, layout.y, parent.y);
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}
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export { calcAxisDelta, calcBoxDelta, calcLength, calcRelativeAxis, calcRelativeAxisPosition, calcRelativeBox, calcRelativePosition, isNear };
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