Minimal test case for issue #3747

main.cpp

#include "ofMain.h"


class ofApp : public ofBaseApp{

	ofVboMesh testMesh;
	ofEasyCam mCam1;

public:

	void setup(){
		testMesh = ofBoxPrimitive(10,10,10,1,1,1).getMesh();

		mCam1.setupPerspective(false,60,0.1,5000);

		mCam1.setDistance(25);
	};

	void draw(){

		ofBackground(ofColor::black);


		mCam1.begin();

		ofSetColor(ofColor::white);
		testMesh.drawWireframe();

		ofSetColor(ofColor::yellow);
		for (vector<ofIndexType>::iterator it = testMesh.getIndices().begin(); it != testMesh.getIndices().end(); ++it){

			//ofSetBitMapmode(OF_BITMAP_MODE_BILLBOARD);

			ofVec3f pos = testMesh.getVertices()[*it]; // fetch point for given index
			pos = pos + testMesh.getNormals()[*it] * 0.75; // shift point to draw index number along its normal

			ofVec3f colorValue = ofVec3f(0.5,0.5,0.5) +  0.5 * testMesh.getNormals()[*it];

			ofSetColor( ofFloatColor(colorValue.x, colorValue.y, colorValue.z, 1.0) );
			ofDrawBitmapString(ofToString(*it), pos.x, pos.y, pos.z );

		}

		mCam1.end();
	};


};


//========================================================================
int main( ){

	ofGLWindowSettings settings;
	settings.setGLVersion(4,1);

	ofCreateWindow(settings);

	ofRunApp(new ofApp());

}