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9.6 KiB
JSON
1 line
9.6 KiB
JSON
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{"ast":null,"code":"import { spring } from './spring/index.mjs';\nimport { calcGeneratorVelocity } from './utils/velocity.mjs';\nfunction inertia(_ref) {\n let {\n keyframes,\n velocity = 0.0,\n power = 0.8,\n timeConstant = 325,\n bounceDamping = 10,\n bounceStiffness = 500,\n modifyTarget,\n min,\n max,\n restDelta = 0.5,\n restSpeed\n } = _ref;\n const origin = keyframes[0];\n const state = {\n done: false,\n value: origin\n };\n const isOutOfBounds = v => min !== undefined && v < min || max !== undefined && v > max;\n const nearestBoundary = v => {\n if (min === undefined) return max;\n if (max === undefined) return min;\n return Math.abs(min - v) < Math.abs(max - v) ? min : max;\n };\n let amplitude = power * velocity;\n const ideal = origin + amplitude;\n const target = modifyTarget === undefined ? ideal : modifyTarget(ideal);\n /**\n * If the target has changed we need to re-calculate the amplitude, otherwise\n * the animation will start from the wrong position.\n */\n if (target !== ideal) amplitude = target - origin;\n const calcDelta = t => -amplitude * Math.exp(-t / timeConstant);\n const calcLatest = t => target + calcDelta(t);\n const applyFriction = t => {\n const delta = calcDelta(t);\n const latest = calcLatest(t);\n state.done = Math.abs(delta) <= restDelta;\n state.value = state.done ? target : latest;\n };\n /**\n * Ideally this would resolve for t in a stateless way, we could\n * do that by always precalculating the animation but as we know\n * this will be done anyway we can assume that spring will\n * be discovered during that.\n */\n let timeReachedBoundary;\n let spring$1;\n const checkCatchBoundary = t => {\n if (!isOutOfBounds(state.value)) return;\n timeReachedBoundary = t;\n spring$1 = spring({\n keyframes: [state.value, nearestBoundary(state.value)],\n velocity: calcGeneratorVelocity(calcLatest, t, state.value),\n // TODO: This should be passing * 1000\n damping: bounceDamping,\n stiffness: bounceStiffness,\n restDelta,\n restSpeed\n });\n };\n checkCatchBoundary(0);\n return {\n calculatedDuration: null,\n next: t => {\n /**\n * We need to resolve the friction to figure out if we need a\n * spring but we don't want to do this twice per frame. So here\n * we flag if we updated for this frame and later if we did\n * we can skip doing it again.\n */\n let hasUpdatedFrame = false;\n if (!spring$1 && timeReachedBoundary === undefined) {\n hasUpdatedFrame = true;\n applyFriction(t);\n checkCatchBoundary(t);\n }\n /**\n * If we have a spring and the provided t is beyond the moment the friction\n * animation crossed the min/max boundary, use the spring.\n */\n if (timeReachedBoundary !== undefined && t >= timeReachedBoundary) {\n return spring$1.next(t - timeReachedBoundary);\n } else {\n !hasUpdatedFrame && applyFriction(t);\n return state;\n }\n }\n };\n}\nexport { inertia };","map":{"version":3,"names":["spring","calcGeneratorVelocity","inertia","_ref","keyframes","velocity","power","timeConstant","bounceDamping","bounceStiffness","modifyTarget","min","max","restDelta","restSpeed","origin","state","done","value","isOutOfBounds","v","undefined","nearestBoundary","Math","abs","amplitude","ideal","target","calcDelta","t","exp","calcLatest","applyFriction","delta","latest","timeReachedBoundary","spring$1","checkCatchBoundary","damping","stiffness","calculatedDuration","next","hasUpdatedFrame"],"sources":["/Users/apple/Documents/cursor/Web课件/AI课/education_web_多Agent协作系统/node_modules/motion-dom/dist/es/animation/generators/inertia.mjs"],"sourcesContent":["import { spring } from './spring/index.mjs';\nimport { calcGeneratorVelocity } from './utils/velocity.mjs';\n\nfunction inertia({ keyframes, velocity = 0.0, power = 0.8, timeConstant = 325, bounceDamping = 10, bounceStiffness = 500, modifyTarget, min, m
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