> On 13 Jun 2018, at 16:57, Deep Bandivadekar <[email protected]>
> wrote:
>
> Hello,
>
> I upgraded my gmsh from 2.10.0 to 3.0.6 for the boolean feature and I wanted
> test the same.
> It's a fairly straightforward script in which I wanted to locate the
> intersection of the two diagonals using the boolean operator.
> ---------------------------------------------------------------
> i=0;
> Point(i) = {0,0,0,0.5}; o1 = i; i++;
> Point(i) = {0,1,0,0.5}; e1 = i; i++;
> Point(i) = {1,0,0,0.5}; e2 = i; i++;
> Point(i) = {1,1,0,0.5}; e3 = i; i++;
> //Point(i) = {0.5,0.5,0,0.5}; e4 = i; i++;
>
> Line(i) = {o1, e1}; l1 = i; i++;
> Line(i) = {e1, e3}; l2 = i; i++;
> Line(i) = {e3, e2}; l3 = i; i++;
> Line(i) = {e2, o1}; l4 = i; i++;
> Line(i) = {e1, e2}; l5 = i; i++;
> Line(i) = {e3, o1};
>
>
> //+
> SetFactory("OpenCASCADE");
> BooleanIntersection{ Line{9}; }{ Line{10}; }
> -------------------------------------------------------------------------------
>
> I get following error statements:
> Error: Unknown OpenCASCADE entity of dimension 1 with tag 9
> Error: <location of file>, line 18: Could not apply booleanoperator
>
> What is the issue here? Can someone help?
>
You change the CAD kernel to OpenCASCADE after having created the points and
lines - which are thus created with the default (built-in) kernel, and are thus
unknown to OpenCASCADE. (Also, BooleanIntersection in OpenCASCADE does not deal
with curves - use BooleanFragments instead.)
Here's the corrected script:
SetFactory("OpenCASCADE");
i=1;
Point(i) = {0,0,0,0.5}; o1 = i; i++;
Point(i) = {0,1,0,0.5}; e1 = i; i++;
Point(i) = {1,0,0,0.5}; e2 = i; i++;
Point(i) = {1,1,0,0.5}; e3 = i; i++;
//Point(i) = {0.5,0.5,0,0.5}; e4 = i; i++;
i=1;
Line(i) = {o1, e1}; l1 = i; i++;
Line(i) = {e1, e3}; l2 = i; i++;
Line(i) = {e3, e2}; l3 = i; i++;
Line(i) = {e2, o1}; l4 = i; i++;
Line(i) = {e1, e2}; l5 = i; i++;
Line(i) = {e3, o1};
BooleanFragments{ Line{5}; Delete; }{ Line{6}; Delete; }
>
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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