各位前輩好，我設備的訊號是TUIO，不是手機的觸控，所以我需要自己產生touchevent
我輸入兩個點，但touchlist只會有一個點，移動還行，縮放就不行了，
請問要怎麼把觸控點加進去呢？
https://jsbin.com/zaxogifino/1/edit?js,console,output
myElement = document.querySelector('#g2');
sendTouchEvent(247, 379, myElement, 'touchstart');
sendTouchEvent(317, 591, myElement, 'touchstart');
sendTouchEvent(257, 389, myElement, 'touchmove');
sendTouchEvent(307, 581, myElement, 'touchmove');
sendTouchEvent(267, 399, myElement, 'touchmove');
sendTouchEvent(297, 571, myElement, 'touchmove');
以上縮放無效
function sendTouchEvent(x, y, element, eventType) {
const touchObj = new Touch({
identifier: Date.now(),
target: element,
clientX: x,
clientY: y,
pageX: x,
pageY: y,
screenX: x,
screenY: y,
radiusX: 25,
radiusY: 25,
rotationAngle: 0,
force: 0.5,
});
const touchEvent = new TouchEvent(eventType, {
cancelable: true,
bubbles: true,
touches: [touchObj],
targetTouches: [],
changedTouches: [touchObj],
shiftKey: true,
});
element.dispatchEvent(touchEvent);
}