transformation-matrix
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2d transformation matrix functions written in ES6 syntax. Tree shaking ready!
76 lines (75 loc) • 3.15 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.fromDefinition = fromDefinition;
var _fromObject = require("./fromObject");
var _translate = require("./translate");
var _scale = require("./scale");
var _rotate = require("./rotate");
var _skew = require("./skew");
var _shear = require("./shear");
/**
* Converts array of matrix descriptor to array of matrix
* @param definitionOrArrayOfDefinition {Object[]} Array of object describing the matrix
* @returns {Matrix[]} Array of matrix
*
* @example
* > fromDefinition([
* { type: 'matrix', a:1, b:2, c:3, d:4, e:5, f:6 },
* { type: 'translate', tx: 10, ty: 20 },
* { type: 'scale', sx: 2, sy: 4 },
* { type: 'rotate', angle: 90, cx: 50, cy: 25 },
* { type: 'skewX', angle: 45 },
* { type: 'skewY', angle: 45 },
* { type: 'shear', shx: 10, shy: 20}
* ])
*
* [
* { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 },
* { a: 1, c: 0, e: 10, b: 0, d: 1, f: 20 },
* { a: 2, c: 0, e: 0, b: 0, d: 4, f: 0 },
* { a: 6.123, c: -1, e: 0, b: 1, d: 6.123, f: 0 },
* { a: 1, c: 0.99.., e: 0, b: 0, d: 1, f: 0 },
* { a: 1, c: 0, e: 0, b: 0.99, d: 1, f: 0 },
* { a: 1, c: 10, e: 0, b: 20, d: 1, f: 0 }
* ]
**/
function fromDefinition(definitionOrArrayOfDefinition) {
return Array.isArray(definitionOrArrayOfDefinition) ? definitionOrArrayOfDefinition.map(mapper) : mapper(definitionOrArrayOfDefinition);
function mapper(descriptor) {
switch (descriptor.type) {
case 'matrix':
if ('a' in descriptor && 'b' in descriptor && 'c' in descriptor && 'd' in descriptor && 'e' in descriptor && 'f' in descriptor) {
return (0, _fromObject.fromObject)(descriptor);
} else {
throw new Error('MISSING_MANDATORY_PARAM');
}
case 'translate':
if (!('tx' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
if ('ty' in descriptor) return (0, _translate.translate)(descriptor.tx, descriptor.ty);
return (0, _translate.translate)(descriptor.tx);
case 'scale':
if (!('sx' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
if ('sy' in descriptor) return (0, _scale.scale)(descriptor.sx, descriptor.sy);
return (0, _scale.scale)(descriptor.sx);
case 'rotate':
if (!('angle' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
if ('cx' in descriptor && 'cy' in descriptor) {
return (0, _rotate.rotateDEG)(descriptor.angle, descriptor.cx, descriptor.cy);
}
return (0, _rotate.rotateDEG)(descriptor.angle);
case 'skewX':
if (!('angle' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
return (0, _skew.skewDEG)(descriptor.angle, 0);
case 'skewY':
if (!('angle' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
return (0, _skew.skewDEG)(0, descriptor.angle);
case 'shear':
if (!('shx' in descriptor && 'shy' in descriptor)) throw new Error('MISSING_MANDATORY_PARAM');
return (0, _shear.shear)(descriptor.shx, descriptor.shy);
default:
throw new Error('UNSUPPORTED_DESCRIPTOR');
}
}
}