public PhysicalJeep(StarlingGameSpriteWithJeepTextures textures, StarlingGameSpriteWithPhysics Context)
{
this.CurrentInput = new KeySample();
this.CameraRotation = Math.PI / 2;
this.textures = textures;
this.driverseat = new DriverSeat();
this.Context = Context;
visual0 = new VisualJeep(textures, Context);
for (int i = 0; i < 7; i++)
{
this.KarmaInput0.Enqueue(
new KeySample()
);
}
Func<double, double, double[]> ff = (a, b) => { return new double[] { a, b }; };
{
xwheels = new[] {
//top left
new Wheel { b2world = Context.groundkarma_b2world, x = -1.1, y = -1.2, width = 0.4, length = 0.8, revolving = true, powered = true },
//top right
new Wheel{b2world= Context.groundkarma_b2world, x =1.1, y =-1.2, width =0.4, length =0.8, revolving =true, powered =true},
//back left
new Wheel{b2world= Context.groundkarma_b2world, x =-1.1, y =1.2, width =0.4, length =0.8, revolving =false, powered =false},
//back right
new Wheel{b2world= Context.groundkarma_b2world, x =1.1, y =1.2, width =0.4, length =0.8, revolving =false, powered =false},
};
karmaunit4_physics = new Car(
b2world: Context.groundkarma_b2world,
width: 2,
length: 4,
position: ff(0, 0),
angle: 180,
// how fast can the jeep go?
power: 120,
max_speed: 120,
max_steer_angle: 33,
//max_steer_angle: 40,
wheels: xwheels
);
}
{
xwheels = new[] {
//top left
new Wheel { b2world = Context.ground_b2world, x = -1.1, y = -1.2, width = 0.4, length = 0.8, revolving = true, powered = true },
//top right
new Wheel{b2world= Context.ground_b2world, x =1.1, y =-1.2, width =0.4, length =0.8, revolving =true, powered =true},
//back left
new Wheel{b2world= Context.ground_b2world, x =-1.1, y =1.2, width =0.4, length =0.8, revolving =false, powered =false},
//back right
new Wheel{b2world= Context.ground_b2world, x =1.1, y =1.2, width =0.4, length =0.8, revolving =false, powered =false},
};
unit4_physics = new Car(
b2world: Context.ground_b2world,
width: 2,
length: 4,
position: ff(0, 0),
angle: 180,
// how fast can the jeep go?
power: 120,
max_speed: 120,
max_steer_angle: 33,
//max_steer_angle: 40,
wheels: xwheels
);
var fix = unit4_physics.fix;
var fix_data = new Action<double>(
jeep_forceA =>
{
if (jeep_forceA < 1)
return;
if (oncollision != null)
oncollision(this, jeep_forceA);
}
);
fix.SetUserData(fix_data);
xwheels[0].setAngle += a =>
{
var cm = new Matrix();
cm.translate(-2, -2);
cm.scale(2, 4);
cm.rotate(a.DegreesToRadians());
cm.translate(-18, -20);
visual0.tire0.transformationMatrix = cm;
};
xwheels[1].setAngle += a =>
{
var cm = new Matrix();
cm.translate(-2, -2);
cm.scale(2, 4);
cm.rotate(a.DegreesToRadians());
cm.translate(18, -20);
visual0.tire1.transformationMatrix = cm;
};
}
{
//initialize body
var def = new b2BodyDef();
def.type = b2Body.b2_dynamicBody;
def.linearDamping = 0.55; //gradually reduces velocity, makes the car reduce speed slowly if neither accelerator nor brake is pressed
def.bullet = true; //dedicates more time to collision detection - car travelling at high speeds at low framerates otherwise might teleport through obstacles.
def.angularDamping = 0.3;
this.damagebody = Context.damage_b2world.CreateBody(def);
//initialize shape
var fixdef = new b2FixtureDef();
fixdef.density = 1.0;
fixdef.friction = 0.3; //friction when rubbing agaisnt other shapes
fixdef.restitution = 0.4; //amount of force feedback when hitting something. >0 makes the car bounce off, it's fun!
var fixdef_shape = new b2PolygonShape();
fixdef.shape = fixdef_shape;
fixdef_shape.SetAsBox(2 / 2, 4 / 2);
var fix = damagebody.CreateFixture(fixdef);
}
Context.internalunits.Add(this);
}
public void ExtractVelocityFromInput(KeySample __keyDown, Car unit4_physics)
{
//var rot = 0;
//var dx = 0.0;
//var dy = 0.0;
unit4_physics.accelerate = Car.ACC_NONE;
unit4_physics.steer_left = Car.STEER_NONE;
unit4_physics.steer_right = Car.STEER_NONE;
if (__keyDown == null)
return;
if (__keyDown[Keys.Up])
{
// we have reasone to keep walking
unit4_physics.accelerate = Car.ACC_ACCELERATE;
//dy = 1;
}
if (__keyDown[Keys.Down])
{
// we have reasone to keep walking
// go slow backwards
//dy = -0.5;
unit4_physics.accelerate = Car.ACC_BRAKE;
}
if (__keyDown[Keys.Left])
{
// we have reasone to keep walking
unit4_physics.steer_left = Car.STEER_LEFT;
}
if (__keyDown[Keys.Right])
{
// we have reasone to keep walking
unit4_physics.steer_right = Car.STEER_RIGHT;
}
}