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average all 3 & 4 finger touches for a more natural way to pan

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This commit is contained in:
Stewart Allen 2022-10-17 20:10:59 -04:00
commit d12be38d12
1 changed files with 14 additions and 4 deletions
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18
src/moto/orbit.js
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@ -490,6 +490,8 @@ moto.Orbit = function (object, domElement, notify, slider) {
function touchstart(event) {
if (scope.enabled === false) return;
const touches = [...event.touches];
switch (event.touches.length) {
case 1: // one-fingered touch: rotate
if (scope.noRotate === true) return;
@ -516,11 +518,14 @@ moto.Orbit = function (object, domElement, notify, slider) {
break;
case 3: // three-fingered touch: pan
case 4: // four-fingered touch: pan
if (scope.noPan === true) return;
state = STATE.TOUCH_PAN;
const px = touches.map(t => t.pageX).reduce((a,b) => a+b) / touches.length;
const py = touches.map(t => t.pageY).reduce((a,b) => a+b) / touches.length;
panStart.set(event.touches[ 0 ].pageX, event.touches[ 0 ].pageY);
panStart.set(px, py);
break;
default:
@ -535,7 +540,7 @@ moto.Orbit = function (object, domElement, notify, slider) {
event.preventDefault();
event.stopPropagation();
let element = scope.domElement === document ? scope.domElement.body : scope.domElement;
const element = scope.domElement === document ? scope.domElement.body : scope.domElement;
switch (event.touches.length) {
case 1: // one-fingered touch: rotate
@ -571,7 +576,7 @@ moto.Orbit = function (object, domElement, notify, slider) {
dollyEnd.set(0, distance);
dollyDelta.subVectors(dollyEnd, dollyStart);
if (touchSlide || (Math.abs(dy/dx) < 1 && slider)) {
if (touchSlide || (Math.abs(dy/dx) < 1 && slider && dx < 200)) {
touchSlide = true;
slider(lastDY ? (lastDY - ddy) : ddy);
lastDY = ddy;
@ -588,10 +593,15 @@ moto.Orbit = function (object, domElement, notify, slider) {
break;
case 3: // three-fingered touch: pan
case 4: // four-fingered touch: pan
if (scope.noPan === true) return;
if (state !== STATE.TOUCH_PAN) return;
panEnd.set(event.touches[ 0 ].pageX, event.touches[ 0 ].pageY);
const tlist = [...event.touches];
const px = tlist.map(t => t.pageX).reduce((a,b) => a+b) / tlist.length;
const py = tlist.map(t => t.pageY).reduce((a,b) => a+b) / tlist.length;
panEnd.set(px, py);
panDelta.subVectors(panEnd, panStart);
scope.pan(panDelta.x, panDelta.y);
panStart.copy(panEnd);