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mobile pinch zoom and layer slider improvements

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This commit is contained in:
Stewart Allen 2022-10-16 23:20:09 -04:00
commit 3644169176
4 changed files with 21 additions and 19 deletions
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31
src/moto/orbit.js
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@ -234,18 +234,14 @@ moto.Orbit = function (object, domElement, notify, slider) {
return pos;
};
this.dollyIn = function (dollyScale) {
if (dollyScale === undefined) {
dollyScale = getZoomScale();
}
scale *= dollyScale;
this.dollyIn = function (factor = 1) {
let dollyScale = getZoomScale(factor);
scale = scale * dollyScale;
};
this.dollyOut = function (dollyScale) {
if (dollyScale === undefined) {
dollyScale = getZoomScale();
}
scale /= dollyScale;
this.dollyOut = function (factor = 1) {
let dollyScale = getZoomScale(factor);
scale = scale / dollyScale;
};
this.update = function () {
@ -338,8 +334,8 @@ moto.Orbit = function (object, domElement, notify, slider) {
return theta
};
function getZoomScale() {
return Math.pow(0.95, scope.zoomSpeed);
function getZoomScale(factor = 1) {
return Math.pow(0.95, factor * scope.zoomSpeed);
}
function onMouseDown(event) {
@ -561,6 +557,7 @@ moto.Orbit = function (object, domElement, notify, slider) {
case 2: // two-fingered touch: dolly
if (scope.noZoom === true) return;
if (state !== STATE.TOUCH_DOLLY) return;
let dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
let dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
let distance = Math.sqrt(dx * dx + dy * dy);
@ -574,15 +571,15 @@ moto.Orbit = function (object, domElement, notify, slider) {
dollyEnd.set(0, distance);
dollyDelta.subVectors(dollyEnd, dollyStart);
if (touchSlide || (Math.abs(ddy/ddx) > 10 && slider)) {
if (touchSlide || (Math.abs(dy/dx) < 1 && slider)) {
touchSlide = true;
slider(lastDY ? lastDY - ddy : ddy);
slider(lastDY ? (lastDY - ddy) : ddy);
lastDY = ddy;
} else {
if (dollyDelta.y > 0) {
scope.dollyOut();
} else {
scope.dollyIn();
scope.dollyOut(0.5);
} else if (dollyDelta.y < 0) {
scope.dollyIn(0.5);
}
}