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handle div by zero for distance derivatives smarter

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This commit is contained in:
Val Erastov 2016-08-29 23:42:16 -07:00
parent 85c48fbab8
commit 4a45decc26
1 changed files with 4 additions and 0 deletions
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web/app/sketcher/constr/constraints.js
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@ -148,6 +148,7 @@ TCAD.constraints.ConstantWrapper = function(constr, mask) {
}; };
this.gradient = function(out) { this.gradient = function(out) {
TCAD.math.Arrays_fill(this.grad, 0, this.grad.length, 0);
constr.gradient(this.grad); constr.gradient(this.grad);
var jj = 0; var jj = 0;
for (j = 0; j < mask.length; j++) { for (j = 0; j < mask.length; j++) {
@ -320,12 +321,14 @@ TCAD.constraints.P2PDistance = function(params, distance) {
var dy = params[p1y].get() - params[p2y].get(); var dy = params[p1y].get() - params[p2y].get();
var d = Math.sqrt(dx * dx + dy * dy); var d = Math.sqrt(dx * dx + dy * dy);
if (d == 0) { if (d == 0) {
if (this.distance == 0) return;
d = 0.000001; d = 0.000001;
} }
out[p1x] = dx / d; out[p1x] = dx / d;
out[p1y] = dy / d; out[p1y] = dy / d;
out[p2x] = -dx / d; out[p2x] = -dx / d;
out[p2y] = -dy / d; out[p2y] = -dy / d;
} }
}; };
@ -353,6 +356,7 @@ TCAD.constraints.P2PDistanceV = function(params) {
var dy = params[p1y].get() - params[p2y].get(); var dy = params[p1y].get() - params[p2y].get();
var d = Math.sqrt(dx * dx + dy * dy); var d = Math.sqrt(dx * dx + dy * dy);
if (d == 0) { if (d == 0) {
if (params[D].get() == 0) return;
d = 0.000001; d = 0.000001;
} }
out[p1x] = dx / d; out[p1x] = dx / d;