scratchfoundation/paper.js
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Clean up and shorten code.

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This commit is contained in:
Jürg Lehni 2011-06-05 21:44:34 +01:00
parent 12e770c032
commit 27c7248a2d
1 changed files with 13 additions and 22 deletions
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35
src/path/PathFitter.js
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@ -97,37 +97,28 @@ var PathFitter = Base.extend({
pt1 = this.points[first],
pt2 = this.points[last];
var A = [];
// Compute the A's
for (var i = 0; i < nPts; i++) {
var u = uPrime[i],
t = 1 - u,
b = 3 * u * t;
A[i] = [
tHat1.normalize(b * t), // b1
tHat2.normalize(b * u) // b2
];
}
// Create the C and X matrices
var C = [[0, 0], [0, 0]],
X = [0, 0];
for (var i = 0; i < nPts; i++) {
C[0][0] += A[i][0].dot(A[i][0]);
C[0][1] += A[i][0].dot(A[i][1]);
// C[1][0] += A[i][0].dot(A[i][1]);
C[1][0] = C[0][1];
C[1][1] += A[i][1].dot(A[i][1]);
var u = uPrime[i],
t = 1 - u,
b = 3 * u * t,
b0 = t * t * t,
b1 = b * t,
b2 = b * u,
b3 = u * u * u,
a1 = tHat1.normalize(b1),
a2 = tHat2.normalize(b2),
tmp = this.points[first + i]
.subtract(pt1.multiply(t * t * t) // b0
.add(pt1.multiply(b * t)) // b1
.add(pt2.multiply(b * u)) // b2
.add(pt2.multiply(u * u * u))); // b3
.subtract(pt1.multiply(b0 + b1))
.subtract(pt2.multiply(b2 + b3));
C[0][0] += a1.dot(a1);
C[0][1] += a1.dot(a2);
// C[1][0] += a1.dot(a2);
C[1][0] = C[0][1];
C[1][1] += a2.dot(a2);
X[0] += A[i][0].dot(tmp);
X[1] += A[i][1].dot(tmp);
}