API: Motion Point Vector

Motion Library v1.3 Motion simplified. Installation Notes: 1. Download motion.zip 2. Close Processing if it is running 3. Unpack to processing\libraries ( i.e. C:\Program Files\processing\libraries ) 4. Launch Processing, a new item named 'motion' is now available under Sketch->Import Library Examples: Show Example #1 - Springy Pendulum - Show Applet // Move mouse around to achieve springy effect import seltar.motion.*; Motion Pendel; void setup() { size(200,200); Pendel = new Motion(width/2,height/2); Pendel.setDamping(0.99); smooth(); } void draw() { if(!mousePressed) background(0); stroke(255); fill(255); Pendel.springTo(mouseX,mouseY); Pendel.move(); line(mouseX,mouseY,Pendel.getX(),Pendel.getY()); ellipse(Pendel.getX(),Pendel.getY(),5+Pendel.getDistance(),5+Pendel.getDistance()); } Show Example #2 - Springy Drawer - Show Applet // Click and drag to draw, press any key to clear import seltar.motion.*; Motion mf, m; void setup() { size(200,200); mf = new Motion(width/2,height/2); mf.setConstant(100); m = new Motion(width/2,height/2); m.setConstant(1000); background(0); smooth(); } void draw() { if(keyPressed) background(0); strokeWeight(mf.getDistance()); mf.followTo(mouseX,mouseY); mf.move(); m.springTo(mf.getX(),mf.getY()); m.move(); if(mousePressed){ stroke(255,20); line(mf.getX(), mf.getY(), m.getX(),m.getY()); fill(255); stroke(255); ellipse(m.getX(),m.getY(),m.getDistance(),m.getDistance()); } } Show Example #3 - Random Angular Motion - Show Applet import seltar.motion.*; Motion m; float Angle = random(TWO_PI), Strokeweight = 1; void setup() { size(200,200); m = new Motion(width/2,height/2); smooth(); background(0); } void draw() { if(mousePressed) background(0); Angle += radians(random(-5,5)); Strokeweight += random(-0.5,0.5); m.moveDir(Angle,random(1,6)); m.wrap(0,0,width,height); m.move(); stroke(255); strokeWeight(abs(Strokeweight)); line(m.getPX(),m.getPY(),m.getX(),m.getY()); } Show Example #4 - Direction And Velocity - Show Applet import seltar.motion.*; Direction d; void setup() { size(200,200); smooth(); d = new Direction(random(width),random(height)); } void draw() { background(0); d.display(); } class Direction { Motion m; Direction(float X, float Y) { m = new Motion(X,Y); } void move() { m.followTo(mouseX,mouseY); m.wrap(0,0,width,height); m.move(); } void display() { move(); stroke(128); noFill(); strokeWeight(2); ellipse(m.getX(),m.getY(),11,11); strokeWeight(1); drawVector(20); } // Thanks to shiffman void drawVector(float scayl) { stroke(200); float arrowsize = 7; pushMatrix(); translate(m.getX(),m.getY()); rotate(m.v.getDirection()); float len = m.v.getVelocity()*scayl; // Draw three lines to make an arrow (draw pointing up since we've rotate to the proper direction) line(0,0,len,0); line(len,0,len-arrowsize,+arrowsize/2); line(len,0,len-arrowsize,-arrowsize/2); popMatrix(); } } Download: Stable v1.3 - motion.zip