public SpringBox(
double px,
double py,
double w,
double h,
out PhysicsObject[] objs)
{
// top left
p0 = new RectangleParticle(px - w / 2, py - h / 2, 1, 1);
// top right
p1 = new RectangleParticle(px + w / 2, py - h / 2, 1, 1);
// bottom right
p2 = new RectangleParticle(px + w / 2, py + h / 2, 1, 1);
// bottom left
p3 = new RectangleParticle(px - w / 2, py + h / 2, 1, 1);
p0.Visible = false;
p1.Visible = false;
p2.Visible = false;
p3.Visible = false;
objs = new PhysicsObject[10];
objs[0] = p0;
objs[1] = p1;
objs[2] = p2;
objs[3] = p3;
// edges
objs[4] = new SpringConstraint(p0, p1);
objs[5] = new SpringConstraint(p1, p2);
objs[6] = new SpringConstraint(p2, p3);
objs[7] = new SpringConstraint(p3, p0);
// crossing braces
objs[8] = new SpringConstraint(p0, p2);
objs[9] = new SpringConstraint(p1, p3);
}
protected void Create(double x, double y)
{
// create the bicycle
double leftX = x - 18;
double rightX = x + 18;
double widthX = rightX - leftX;
double midX = leftX + (widthX / 2);
double topY = y + 0;
// wheels
wheelA = new Wheel(leftX, topY, 12);
Add(wheelA, "wheelA");
wheelB = new Wheel(rightX, topY, 12);
Add(wheelB, "wheelB");
// body
PhysicsObject[] objs;
SpringBox rectA = new SpringBox(midX, topY, widthX, 15, out objs);
foreach (PhysicsObject o in objs)
{
Add(o);
}
// wheel struts
SpringConstraint conn1 = new SpringConstraint(wheelA, rectA.P3);
Add(conn1);
SpringConstraint conn2 = new SpringConstraint(wheelB, rectA.P2);
Add(conn2);
SpringConstraint conn1a = new SpringConstraint(wheelA, rectA.P0);
Add(conn1a);
SpringConstraint conn2a = new SpringConstraint(wheelB, rectA.P1);
Add(conn2a);
// triangle top of car
personHead = new CircleParticle(midX, topY - 30, 5);
Add(personHead);
personHead.Contact += delegate(object sender, EventArgs e)
{
Kill();
};
sHeadToWheelA = new SpringConstraint(personHead, wheelA);
Add(sHeadToWheelA);
sHeadToWheelB = new SpringConstraint(personHead, wheelB);
Add(sHeadToWheelB);
// angular constraint for triangle top
sBikeAngular = new AngularConstraint(wheelA, personHead, wheelB);
Add(sBikeAngular);
angDefault = sBikeAngular.TargetTheta;
personBody = new CircleParticle(midX - 5, topY - 20, 5);
personLegs = new CircleParticle(midX, topY - 5, 5);
aPose = new AngularConstraint(personHead, personBody, personLegs);
sHeadToBody = new SpringConstraint(personHead, personBody);
sHeadToBody.RestLength = 12;
Add(sHeadToBody);
sBodyToLegs = new SpringConstraint(personBody, personLegs);
sBodyToLegs.RestLength = 12;
Add(sBodyToLegs);
Add(personBody);
Add(personLegs);
sLegsToWheelB = new SpringConstraint(personLegs, wheelB);
sLegsToWheelB.RestLength = 20;
Add(sLegsToWheelB);
sLegsToWheelA = new SpringConstraint(personLegs, wheelA);
sLegsToWheelA.RestLength = 20;
Add(sLegsToWheelA);
}