l_c

#definicao da bola
v = PVector(0,0)
p = PVector(400,400)
r = 10




#incrementos e verfificadores de movimento    
inc = PVector(0,0)     
ver = False

class Bola:
    def __init__(self,p,v,r):
        self.v = v
        self.p = p
        self.r = r
    def move(self,dt):
        self.p.add(self.v*dt)

    def xlr8(self,dt):
        F = self.v.copy()
        F.mult(-0.1*F.mag()**2)
        F.mult(dt)
        self.v.add(F)
    
        


b = Bola(p,v,r)

def colide(b, s):
    
    vy = s.mult(b.v.dot(s))
    vx = b.v - vy

    
    vy = vy.mult(-1)
    
    b.v = vx.add(vy)


t = millis()
xmin = ymin = 200
xmax = ymax = 600


def setup():
    size(800,800)

def draw():
    global t, xmin, xmax, ymin, ymax
    
    oldt = t
    t = millis()
    dt = t-oldt
    
    background(0)
    rectMode(CORNERS)
    noFill()
    stroke(255)
    rect(xmin,ymin,xmax,ymax)
    
    b.move(dt)
    #b.xlr8(dt)
    
    if b.p.x <= xmin+b.r:
        colide(b, PVector(1,0))
    elif b.p.x >= xmax-b.r:
        colide(b, PVector(-1,0))
    elif b.p.y <= ymin+b.r:
        colide(b, PVector(0,1))
    elif b.p.y >= ymax-b.r:
        colide(b, PVector(0,-1))
    
    
    fill(255)
    noStroke()
    ellipse(b.p.x,b.p.y, 2*b.r, 2*b.r)
    
    noFill()
    stroke(255)
    ellipse(b.p.x,b.p.y, 2*b.r+20, 2*b.r+20)
    print(ver)
    print(inc)


def mouseDragged():
    global inc, ver
    
    
    if sqrt((mouseX - p.x)**2 + (mouseY-p.y)**2) <= r+10:
        ver = True
    
    if ver:
        inc.x = p.x - mouseX
        inc.y = p.y - mouseY
        stroke(255,0,0)
        line(p.x,p.y,mouseX,mouseY)

def mouseReleased():
    global inc, ver
    if ver:
        b.v.add(inc.div(500))
        inc = PVector(0,0) 
        ver = False