Created
February 5, 2014 17:53
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smooth line drawing input for openframeworks
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| #include "testApp.h" | |
| // this can go in your h file; | |
| ofPoint pts[5]; | |
| uint ctr; | |
| ofPath path; | |
| ofPolyline lineOrig; | |
| //-------------------------------------------------------------- | |
| void testApp::setup(){ | |
| ofBackground(0); | |
| ctr = 1; | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::update(){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::draw(){ | |
| path.setFilled(false); | |
| if (path.getOutline().size() > 0){ | |
| path.getOutline()[0].draw(); | |
| } | |
| ofTranslate(300,0); | |
| lineOrig.draw(); | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::keyPressed(int key){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::keyReleased(int key){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::mouseMoved(int x, int y ){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::mouseDragged(int x, int y, int button){ | |
| lineOrig.addVertex( ofPoint (x,y)); | |
| ofPoint p = ofPoint(x,y); | |
| ctr++; | |
| pts[ctr] = p; | |
| if (ctr == 4) | |
| { | |
| pts[3] = ofPoint((pts[2].x + pts[4].x)/2.0, (pts[2].y + pts[4].y)/2.0); // move the endpoint to the middle of the line joining the second control point of the first Bezier segment and the first control point of the second Bezier segment | |
| if (path.getCommands().size() == 0) path.moveTo(pts[0]); | |
| path.bezierTo(pts[1],pts[2], pts[3]); | |
| pts[0] = pts[3]; | |
| pts[1] = pts[4]; | |
| ctr = 1; | |
| } | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::mousePressed(int x, int y, int button){ | |
| ctr = 0; | |
| pts[0] = ofPoint(x,y); | |
| path.clear(); | |
| lineOrig.addVertex( ofPoint (x,y)); | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::mouseReleased(int x, int y, int button){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::windowResized(int w, int h){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::gotMessage(ofMessage msg){ | |
| } | |
| //-------------------------------------------------------------- | |
| void testApp::dragEvent(ofDragInfo dragInfo){ | |
| } |
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smoother drawing code for OF
comparison: http://i.imgur.com/8XbIqAe.png