120 lines
3.5 KiB
Plaintext
120 lines
3.5 KiB
Plaintext
var time = use('time')
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var audio = use('sound')
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var math = use('math/radians')
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var gesture = {}
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gesture.MIN_SWIPE = 30
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gesture.MAX_TIME = 500
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gesture.PINCH_TH = 10
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gesture.reset = function() {
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this.touches = {} // Track active touches by finger id
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this.gestureState = null // Current gesture being tracked
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this.startTime = 0
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this.startDist = 0
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}
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gesture.on_input = function(action_id, action) {
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if (search(action_id, 'gamepad_touchpad_') == null) return
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var finger = action.finger || 0
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var touchpad = action.touchpad || 0
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var fingerId = `${touchpad}_${finger}`
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if (action_id == 'gamepad_touchpad_down') {
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// Add new touch
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this.touches[fingerId] = {
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x: action.x,
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y: action.y,
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startX: action.x,
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startY: action.y,
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startTime: time.number()
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}
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var touchCount = length(array(this.touches))
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if (touchCount == 1) {
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// Single touch started
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this.gestureState = 'single'
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this.startTime = time.number()
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} else if (touchCount == 2) {
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// Two touches - potential pinch
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this.gestureState = 'multi'
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var fingers = object.values(this.touches)
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this.startDist = this.dist(fingers[0], fingers[1])
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}
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}
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else if (action_id == 'gamepad_touchpad_motion') {
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if (this.touches[fingerId]) {
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// Update touch position
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this.touches[fingerId].x = action.x
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this.touches[fingerId].y = action.y
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var touchCount = length(array(this.touches))
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if (touchCount == 2 && this.gestureState == 'multi') {
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// Check for pinch gesture
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var fingers = object.values(this.touches)
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var currentDist = this.dist(fingers[0], fingers[1])
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var d = currentDist - this.startDist
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if (abs(d) >= this.PINCH_TH) {
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var gesture_type = d > 0 ? 'pinch_out' : 'pinch_in'
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// scene.recurse(game.root, 'on_input', [gesture_type, { delta: d }])
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this.startDist = currentDist
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}
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}
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}
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}
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else if (action_id == 'gamepad_touchpad_up') {
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if (this.touches[fingerId]) {
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var touch = this.touches[fingerId]
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var touchCount = length(array(this.touches))
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// Check for swipe if this was the only/last touch
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if (touchCount == 1 && this.gestureState == 'single') {
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var dt = time.number() - touch.startTime
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var dx = action.x - touch.startX
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var dy = action.y - touch.startY
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if (dt < this.MAX_TIME / 1000) { // Convert to seconds
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var absX = abs(dx), absY = abs(dy)
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if (absX > this.MIN_SWIPE / 100 || absY > this.MIN_SWIPE / 100) { // Normalize for 0-1 range
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var dir = absX > absY
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? (dx > 0 ? 'swipe_right' : 'swipe_left')
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: (dy > 0 ? 'swipe_down' : 'swipe_up')
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audio.play('swipe')
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// scene.recurse(game.root, 'on_input', [dir, {pressed:true}])
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}
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}
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}
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// Remove touch
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delete this.touches[fingerId]
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// Reset if no touches left
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if (length(array(this.touches)) == 0) {
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this.gestureState = null
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}
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}
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}
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}
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gesture.dist = function(p1, p2) {
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var dx = p2.x - p1.x
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var dy = p2.y - p1.y
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return math.sqrt(math.power(dx, 2) + math.power(dy, 2))
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}
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return function(options) {
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var obj = meme(gesture)
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if (options) {
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obj.MIN_SWIPE = options.minSwipe || gesture.MIN_SWIPE
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obj.MAX_TIME = options.maxTime || gesture.MAX_TIME
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obj.PINCH_TH = options.pinchThreshold || gesture.PINCH_TH
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}
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obj.reset()
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return obj
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} |