scratchfoundation/paper.js
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Use local references to often called Math functions, allowing uglify to shorten them further.

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This commit is contained in:
Jürg Lehni 2011-03-07 16:49:02 +00:00
parent 8bfa4e6073
commit ff2b740c68
1 changed files with 17 additions and 13 deletions
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30
src/util/Numerical.js
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@ -21,9 +21,9 @@ var Numerical = new function() {
-0.9324695142, 0.9324695142, -0.6612093865, 0.6612093865, -0.2386191861, 0.2386191861,
-0.9491079123, 0.9491079123, -0.7415311856, 0.7415311856, -0.4058451514, 0.4058451514, 0.0000000000,
-0.9602898565, 0.9602898565, -0.7966664774, 0.7966664774, -0.5255324099, 0.5255324099, -0.1834346425, 0.1834346425
];
],
var weight = [
weight = [
1, 1,
0.5555555556, 0.5555555556, 0.8888888888,
0.3478548451, 0.3478548451, 0.6521451549, 0.6521451549,
@ -31,7 +31,11 @@ var Numerical = new function() {
0.1713244924, 0.1713244924, 0.3607615730, 0.3607615730, 0.4679139346, 0.4679139346,
0.1294849662, 0.1294849662, 0.2797053915, 0.2797053915, 0.3818300505, 0.3818300505, 0.4179591837,
0.1012285363, 0.1012285363, 0.2223810345, 0.2223810345, 0.3137066459, 0.3137066459, 0.3626837834, 0.3626837834
];
],
max = Math.max,
min = Math.min,
abs = Math.abs;
return {
TOLERANCE: 10e-6,
@ -43,7 +47,7 @@ var Numerical = new function() {
* All Rights Reserved.
*/
integrate: function(f, a, b, n) {
n = Math.min(Math.max(n, 2), 8);
n = min(max(n, 2), 8);
var l = n == 2 ? 0 : n * (n - 1) / 2 - 1,
sum = 0,
@ -71,7 +75,7 @@ var Numerical = new function() {
fc = fa;
e = d = b - a;
}
if (Math.abs(fc) < Math.abs(fb)) {
if (abs(fc) < abs(fb)) {
a = b;
b = c;
c = a;
@ -79,12 +83,12 @@ var Numerical = new function() {
fb = fc;
fc = fa;
}
var tol1 = 2 * Number.MIN_VALUE * Math.abs(b) + 0.5 * tol,
var tol1 = 2 * Number.MIN_VALUE * abs(b) + 0.5 * tol,
xm = 0.5 * (c - b);
if (Math.abs(xm) <= tol1 || fb == 0) {
if (abs(xm) <= tol1 || fb == 0) {
return b;
}
if (Math.abs(e) >= tol1 && Math.abs(fa) > Math.abs(fb)) {
if (abs(e) >= tol1 && abs(fa) > abs(fb)) {
var p, q, r,
s = fb / fa;
if (a == c) {
@ -98,9 +102,9 @@ var Numerical = new function() {
}
if (p > 0)
q = -q;
p = Math.abs(p);
var min1 = 3 * xm * q - Math.abs(tol1 * q),
min2 = Math.abs(e * q);
p = abs(p);
var min1 = 3 * xm * q - abs(tol1 * q),
min2 = abs(e * q);
if (2 * p < (min1 < min2 ? min1 : min2)) {
e = d;
d = p / q;
@ -114,10 +118,10 @@ var Numerical = new function() {
}
a = b;
fa = fb;
if (Math.abs(d) > tol1)
if (abs(d) > tol1)
b += d;
else
b += xm >= 0 ? Math.abs(tol1) : -Math.abs(tol1);
b += xm >= 0 ? abs(tol1) : -abs(tol1);
fb = f(b);
}
return b;