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var svgns = 'http://www.w3.org/2000/svg';
var svg = document.createElementNS(svgns, 'svg');
module('svgedit.math');
test('Test svgedit.math package', function() {
expect(7);
ok(svgedit.math);
ok(svgedit.math.transformPoint);
ok(svgedit.math.isIdentity);
ok(svgedit.math.matrixMultiply);
equals(typeof svgedit.math.transformPoint, typeof function(){});
equals(typeof svgedit.math.isIdentity, typeof function(){});
equals(typeof svgedit.math.matrixMultiply, typeof function(){});
});
test('Test svgedit.math.transformPoint() function', function() {
expect(6);
var transformPoint = svgedit.math.transformPoint;
var m = svg.createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 0;
var pt = transformPoint(100, 200, m);
equals(pt.x, 100);
equals(pt.y, 200);
m.e = 300; m.f = 400;
pt = transformPoint(100, 200, m);
equals(pt.x, 400);
equals(pt.y, 600);
m.a = 0.5; m.b = 0.75;
m.c = 1.25; m.d = 2;
pt = transformPoint(100, 200, m);
equals(pt.x, 100 * m.a + 200 * m.c + m.e);
equals(pt.y, 100 * m.b + 200 * m.d + m.f);
});
test('Test svgedit.math.isIdentity() function', function() {
expect(2);
ok(svgedit.math.isIdentity(svg.createSVGMatrix()));
var m = svg.createSVGMatrix();
m.a = 1; m.b = 0;
m.c = 0; m.d = 1;
m.e = 0; m.f = 0;
ok(svgedit.math.isIdentity(m));
});
test('Test svgedit.math.matrixMultiply() function', function() {
expect(5);
var mult = svgedit.math.matrixMultiply;
var isIdentity = svgedit.math.isIdentity;
// translate there and back
var tr_1 = svg.createSVGMatrix().translate(100,50),
tr_2 = svg.createSVGMatrix().translate(-90,0),
tr_3 = svg.createSVGMatrix().translate(-10,-50),
I = mult(tr_1,tr_2,tr_3);
ok(isIdentity(I), 'Expected identity matrix when translating there and back');
// rotate there and back
// TODO: currently Mozilla fails this when rotating back at -50 and then -40 degrees
// (b and c are *almost* zero, but not zero)
var rot_there = svg.createSVGMatrix().rotate(90),
rot_back = svg.createSVGMatrix().rotate(-90); // TODO: set this to -50
rot_back_more = svg.createSVGMatrix().rotate(0); // TODO: set this to -40
I = mult(rot_there, rot_back, rot_back_more);
ok(isIdentity(I), 'Expected identity matrix when rotating there and back');
// scale up and down
var scale_up = svg.createSVGMatrix().scale(4),
scale_down = svg.createSVGMatrix().scaleNonUniform(0.25,1);
scale_down_more = svg.createSVGMatrix().scaleNonUniform(1,0.25);
I = mult(scale_up, scale_down, scale_down_more);
ok(isIdentity(I), 'Expected identity matrix when scaling up and down');
// test multiplication with its inverse
I = mult(rot_there, rot_there.inverse());
ok(isIdentity(I), 'Expected identity matrix when multiplying a matrix by its inverse');
I = mult(rot_there.inverse(), rot_there);
ok(isIdentity(I), 'Expected identity matrix when multiplying a matrix by its inverse');
});
});
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<h1 id='qunit-header'>Unit Tests for math.js</h1>
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