DistanceConstraint

var dc = new DistanceConstraint(a, b, stiffness, distance)

• dc.a
• dc.b
• dc.distance
• dc.stiffness
• dc.relax(stepCoef)
• dc.draw(ctx)

PinConstraint

var pc = new PinConstrain(a, pos)

• pc.a
• pc.pos
• pc.relax(stepCoef)
• pc.draw(ctx)

AngleConstraint

var ac = new AngleConstraint(a, b, c, stiffness)

• ac.a
• ac.b
• ac.c
• ac.relax(stepCoef)
• ac.draw(ctx)