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bound u and v for surface intersection iterations

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This commit is contained in:
Val Erastov 2018-04-06 19:45:59 -07:00
parent 04eb798e49
commit 6c0988fa4d
1 changed files with 20 additions and 2 deletions
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22
web/lib/verb.js
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@ -4593,6 +4593,16 @@ verb_eval_Intersect.surfaces = function(surface0,surface1,tol) {
});
};
verb_eval_Intersect.surfacesAtPointWithEstimate = function(surface0,surface1,uv1,uv2,tol) {
function boundParams(uv, surface) {
uv[0] = boundParam(uv[0], surface.knotsU);
uv[1] = boundParam(uv[1], surface.knotsV);
}
function boundParam(u, knots) {
return Math.min(knots[knots.length - 1], Math.max(knots[0], u));
}
var pds;
var p;
var pn;
@ -4637,8 +4647,16 @@ verb_eval_Intersect.surfacesAtPointWithEstimate = function(surface0,surface1,uv1
var dt = verb_core_Vec.dot(rw,pdif) / verb_core_Vec.dot(rw,pv);
var du = verb_core_Vec.dot(sv,qdif) / verb_core_Vec.dot(sv,qu);
var dv = verb_core_Vec.dot(su,qdif) / verb_core_Vec.dot(su,qv);
uv1 = verb_core_Vec.add([dw,dt],uv1);
uv2 = verb_core_Vec.add([du,dv],uv2);
var newuv1 = verb_core_Vec.add([dw,dt],uv1);
var newuv2 = verb_core_Vec.add([du,dv],uv2);
boundParams(newuv1, surface0);
boundParams(newuv2, surface1);
var eee = 1e-6 * 1e-6;
if (verb_core_Vec.distSquared(newuv1, uv1) < eee && verb_core_Vec.distSquared(newuv2, uv2) < eee) {
break;
}
uv1 = newuv1;
uv2 = newuv2;
its++;
} while(its < maxits);
return new verb_core_SurfaceSurfaceIntersectionPoint(uv1,uv2,p,dist);