51 lines
879 B
JavaScript
51 lines
879 B
JavaScript
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function pointSub(a, b) {
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return { x: a.x - b.x, y: a.y - b.y }
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}
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function pointAdd(a, b) {
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return { x: a.x + b.x, y: a.y + b.y }
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}
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function pointDistance(a, b) {
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const diffX = a.x - b.x
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const diffY = a.y - b.y
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return Math.sqrt(diffX * diffX + diffY * diffY)
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}
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function pointInBounds(pt, rect) {
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return pt.x >= rect.x
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&& pt.x <= rect.x + rect.w
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&& pt.y >= rect.y
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&& pt.y <= rect.y + rect.h
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}
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function rectCenter(rect) {
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return {
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x: rect.x + (rect.w / 2),
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y: rect.y + (rect.h / 2),
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}
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}
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function rectMoved(rect, x, y) {
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return {
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x: rect.x + x,
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y: rect.y + y,
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w: rect.w,
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h: rect.h,
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}
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}
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function rectCenterDistance(rectA, rectB) {
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return pointDistance(rectCenter(rectA), rectCenter(rectB))
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}
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export default {
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pointSub,
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pointAdd,
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pointDistance,
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pointInBounds,
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rectCenter,
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rectMoved,
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rectCenterDistance,
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}
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