//-------------------------------------------------------------- void ofApp::draw(){ if(poly.size() < 2) return; ofPushMatrix(); ofTranslate(ofGetWidth()/2, ofGetHeight()/2); ofRotateY(rotAngle); ofSetColor(255, 255, 255); poly.draw(); ofSetColor(0, 255, 0); ofSetRectMode(OF_RECTMODE_CENTER); glPointSize(5); glBegin(GL_POINTS); for(int i=0; i<poly.size(); i++) { ofPoint p = poly[i]; glVertex3f(p.x, p.y, p.z); } glEnd(); for(int i=0; i<poly.size(); i++) { ofPoint p = poly[i]; ofSetColor(255, 0, 0); ofLine(p, p + poly.getTangentAtIndex(i) * 20); ofSetColor(0, 255, 0); ofLine(p, p + poly.getNormalAtIndex(i) * 20); ofSetColor(0, 128, 255); ofLine(p, p + poly.getRotationAtIndex(i) * 20); } float totalLength = poly.getPerimeter(); float totalArea = poly.getArea(); ofPoint nearestPoint = poly.getClosestPoint(ofPoint(mouseX-ofGetWidth()/2, mouseY-ofGetHeight()/2), &nearestIndex); ofPoint nearestDataPoint = poly[nearestIndex]; float lengthAtIndex = poly.getLengthAtIndex(nearestIndex); ofPoint pointAtIndex = poly.getPointAtIndexInterpolated(nearestIndex); ofPoint pointAtLength = poly.getPointAtLength(lengthAtIndex); ofPoint pointAtPercent = poly.getPointAtPercent(lengthAtIndex / totalLength); float indexAtLength = poly.getIndexAtLength(lengthAtIndex); float sinTime = ofMap(sin(ofGetElapsedTimef() * 0.5), -1, 1, 0, 1); float sinIndex = sinTime * (poly.isClosed() ? poly.size() : (poly.size()-1)); // sinTime mapped to indices direct float sinIndexLength = poly.getIndexAtPercent(sinTime); // sinTime mapped to indices based on length float lengthAtIndexSin = poly.getLengthAtIndexInterpolated(sinIndex); ofPoint pointAtIndexSin = poly.getPointAtIndexInterpolated(sinIndex); ofPoint pointAtPercentSin = poly.getPointAtPercent(sinTime); float angleAtIndex = poly.getAngleAtIndex(nearestIndex); float angleAtIndexSin = poly.getAngleAtIndexInterpolated(sinIndex); ofVec3f rotAtIndex = poly.getRotationAtIndex(nearestIndex); ofVec3f rotAtIndexSin = poly.getRotationAtIndexInterpolated(sinIndex); float rotMagAtIndex = rotAtIndex.length(); float rotMagAtIndexSin = rotAtIndexSin.length(); ofVec3f normalAtIndex = poly.getNormalAtIndex(nearestIndex); ofVec3f tangentAtIndexSin = poly.getTangentAtIndexInterpolated(sinIndex); ofVec3f normalAtIndexSin = poly.getNormalAtIndexInterpolated(sinIndex); ofVec3f rotationAtIndexSin = poly.getRotationAtIndexInterpolated(sinIndex); ofNoFill(); ofSetLineWidth(2); ofSetColor(255, 0, 0); ofCircle(nearestPoint, 5); ofSetColor(255, 255, 0); ofCircle(nearestDataPoint, 7); // interpolating on indices { ofPoint p = poly.getPointAtIndexInterpolated(sinIndex); ofSetColor(0, 255, 255); ofCircle(p, 10); ofSetColor(255, 0, 0); ofLine(p, p + poly.getTangentAtIndexInterpolated(sinIndex) * 60); ofSetColor(0, 255, 0); ofLine(p, p + poly.getNormalAtIndexInterpolated(sinIndex) * 60); ofSetColor(0, 128, 255); ofLine(p, p + poly.getRotationAtIndexInterpolated(sinIndex) * 60); } // interpolating on length percentages { ofPoint p = poly.getPointAtIndexInterpolated(sinIndexLength); ofSetColor(255, 0, 255); ofCircle(p, 10); ofSetColor(255, 0, 0); ofLine(p, p + poly.getTangentAtIndexInterpolated(sinIndexLength) * 60); ofSetColor(0, 255, 0); ofLine(p, p + poly.getNormalAtIndexInterpolated(sinIndexLength) * 60); ofSetColor(0, 128, 255); ofLine(p, p + poly.getRotationAtIndexInterpolated(sinIndexLength) * 60); } ofSetColor(255, 255, 255); ofCircle(poly.getCentroid2D(), 20); ofPopMatrix(); stringstream s; s << "Number of points: " << poly.size() << endl; s << "totalLength: " << totalLength << endl; s << endl; s << "nearestIndex: " << nearestIndex << endl; s << "nearestPoint: " << nearestPoint << endl; s << "nearestDataPoint: " << nearestDataPoint << endl; s << endl; s << "lengthAtIndex: " << lengthAtIndex << endl; s << "pointAtIndex: " << pointAtIndex << endl; s << endl; s << "pointAtLength: " << pointAtLength << endl; s << "pointAtPercent: " << pointAtPercent << endl; s << endl; s << "indexAtLength: " << indexAtLength << endl; s << endl; s << "sinTime: " << sinTime << endl; s << "sinIndex: " << sinIndex << endl; s << "sinIndexLength: " << sinIndexLength << endl; s << endl; s << "lengthAtIndexSin: " << lengthAtIndexSin << endl; s << "pointAtIndexSin: " << pointAtIndexSin << endl; s << "pointAtPercentSin: " << pointAtPercentSin << endl; s << endl; s << "angleAtIndex: " << angleAtIndex << endl; s << "angleAtIndexSin: " << angleAtIndexSin << endl; s << endl; s << "rotAtIndex: " << rotAtIndex << endl; s << "rotAtIndexSin: " << rotAtIndexSin << endl; s << endl; s << "rotMagAtIndex: " << rotMagAtIndex << endl; s << "rotMagAtIndexSin: " << rotMagAtIndexSin << endl; s << endl; s << "normalAtIndex: " << normalAtIndex << endl; s << "normalAtIndexSin: " << normalAtIndexSin << endl; ofSetColor(255); ofDrawBitmapString(s.str(), 10, 30); }