WalkVect ofApp::createWalkVect(ofPoint velocity, ofPoint vector, IsLine line) {
ofPoint dir = vector.normalize();
if(velocity.y < 0) dir *= -1;
WalkVect vect;
vect.dir = dir;
vect.spd = velocity.length();
vect.line = line;
return vect;
}
void ofApp::update(){
mouse = ofPoint(mouseX, mouseY);
mouse -= center;
m = mouse.length();
cout << m << " is the magnitude of m" <<endl;
//unit vectors
mouse.normalize();
mouse*=50;
}
//--------------------------------------------------------------
void testApp::drawGravity(ofPoint p, ofPoint gravity) {
float angle = (atan2(gravity.y, gravity.x) * 180 / PI) - 90;
float len = MIN(200, gravity.length()*10); // scale it up a bit
ofPushMatrix();
ofTranslate(p.x, p.y);
ofRotate(angle);
ofLine(0, 0, 0, len);
ofTriangle(0, len,
-5, len-10,
5, len-10);
ofPopMatrix();
}
void ofApp::drawVector(ofPoint v, ofPoint loc, float scayl){
ofPushMatrix();
float arrowsize = 4;
// Translate to location to render vector
ofTranslate(loc);
ofColor(255);
// Call vector heading function to get direction (note that pointing up is a heading of 0) and rotate
float angle = (float)atan2(-v.y, v.x);
float theta = -1.0*angle;
float heading2D = ofRadToDeg(theta);
ofRotateZ(heading2D);
// Calculate length of vector & scale it to be bigger or smaller if necessary
float len = v.length()*scayl;
// Draw three lines to make an arrow (draw pointing up since we've rotate to the proper direction)
ofDrawLine(0,0,len,0);
ofDrawLine(len,0,len-arrowsize,+arrowsize/2);
ofDrawLine(len,0,len-arrowsize,-arrowsize/2);
ofPopMatrix();
}
