react-pinch-and-zoom
Version:
A react container component with pinch-to-zoom gesture interaction.
76 lines • 1.72 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
function newOriginPoint() {
return {
x: 0,
y: 0
};
}
exports.newOriginPoint = newOriginPoint;
function distance(p1, p2) {
var x1 = p1.x, y1 = p1.y;
var x2 = p2.x, y2 = p2.y;
return Math.sqrt(Math.pow(x1 - x2, 2) + Math.pow(y1 - y2, 2));
}
exports.distance = distance;
function midpoint(p1, p2) {
return {
x: (p1.x + p2.x) / 2,
y: (p1.y + p2.y) / 2,
};
}
exports.midpoint = midpoint;
function offset(p, origin) {
return {
x: p.x - origin.x,
y: p.y - origin.y,
};
}
exports.offset = offset;
function map(p, f) {
return {
x: f(p.x),
y: f(p.y),
};
}
exports.map = map;
function scale(p, s) {
return map(p, function (v) { return v * s; });
}
exports.scale = scale;
function sum(p1, p2) {
return {
x: p1.x + p2.x,
y: p1.y + p2.y,
};
}
exports.sum = sum;
function isEqual(p1, p2) {
return p1.x === p2.x && p1.y === p2.y;
}
exports.isEqual = isEqual;
function boundWithin(min, current, max) {
var numberWithin = function (lower, num, upper) {
return num > upper ? upper : lower > num ? lower : num;
};
return {
x: numberWithin(min.x, current.x, max.x),
y: numberWithin(min.y, current.y, max.y),
};
}
exports.boundWithin = boundWithin;
function normalizePointInRect(point, rect) {
return {
x: point.x - rect.origin.x,
y: point.y - rect.origin.y,
};
}
exports.normalizePointInRect = normalizePointInRect;
function toSize(p) {
return {
width: p.x,
height: p.y
};
}
exports.toSize = toSize;
//# sourceMappingURL=Point.js.map