Can't create ofPolyline from ofVec2f

bugs, errors
#1

Before I create an issue on Github, I want to check if I might be doing something wrong.

The docs for ofPolyline say:

ofPolyline(...)
Creates an ofPolyline from a vector of ofVec2f or ofPoint objects.`

This works:

vector<ofPoint> pts;
pts.push_back(ofPoint(0, 0));
pts.push_back(ofPoint(100, 100);
ofPolyline line(pts);

But doing the same with ofVec2f crashes on the last line:

vector<ofVec2f> vecs;
vecs.push_back(ofVec2f(0, 0));
vecs.push_back(ofVec2f(100, 100));
ofPolyline line(vecs);

Am I missing something?

#2

To update; you can create an ofPolyline from an ofVec3f vector, but not an ofVec2f vector. This (same as above but with ofVec3f) does work:

vector <ofVec3f> vecs;
vec.push_back(ofVec3f(0, 0));
vec.push_back(ofVec3f(100, 100));
ofPolyline line(vecs);

I tried to take a look at the source, and locally I have a ofPolyline.cpp file (of_v0.9.3_linux64_release/libs/openFrameworks/graphics/ofPolyline.cpp), but I can’t seem to find this file in the Github repo?

Update: created an issue here.

#3

The documentation in the web refers to the current official version. In the repo ofVec* is now deprecated and is recomended to use glm::vec* instead.

ofPolyline is now templated (that’s why there’s no cpp) and by default uses glm::vec3.but you can also create a polyline of glm::vec2 or ofVec2f using:

ofPolyline<glm::vec2> polyline2(vecs);

or

ofPolyline<ofVec2f> polyline2(vecs);
1 Like
#4

So that means the current documentation is wrong in saying you can use ofVec2f, but it (ofVec2f) will be removed in the next update anyway?

#5

yeah you are correct, the constructor docs should say ofVec3f or ofPoint which are actually the same. if you want to send a PR to ofSite?

#6

@arturo @javl, I can take care of the PR