private void InitClothScene()
{
//cloth attributes
int length = 10;
int width = 5;
int lengthSegments = 20;
int widthSegments = 15;
//load in a plane
clothPlane = new TexturedPlane(this, length, width, lengthSegments, widthSegments, @"checkerboard");
clothPlane.Initialize();
//create a cloth sim
float clothMass = 2.0f;
float structStiffness = 2.0f;
float structDamping = 0.02f;
float shearStiffness = 2.0f;
float shearDamping = 0.02f;
float bendStiffness = 2.0f;
float bendDamping = 0.02f;
clothSim = new ClothSim(this, clothPlane, clothMass, structStiffness, structDamping, shearStiffness, shearDamping, bendStiffness, bendDamping);
clothSim.ConstraintIterations = 10;
//add in a global forceGenerators: gravity
Gravity gravity = new Gravity(new Vector3(0, -9.81f, 0));
clothSim.AddGlobalForceGenerator(gravity);
//constrain the two top corners of the cloth so that we can control it
topLeftCorner = new PointConstraint(clothSim.SimVertices[0].CurrPosition, clothSim.SimVertices[0]);
clothSim.Constraints.Add(topLeftCorner);
topRightCorner = new PointConstraint(clothSim.SimVertices[lengthSegments].CurrPosition, clothSim.SimVertices[lengthSegments]);
clothSim.Constraints.Add(topRightCorner);
//create an integrator and assign it to the sim
float drag = 0.01f;
Integrator integrator = new VerletNoVelocityIntegrator(this, drag);
clothSim.Integrator = integrator;
}
private void InitSpringScene()
{
//load in a cube and a sphere
GameModel stationaryCube = modelComponent.LoadGameModel(@"cube");
stationaryCube.TranslateY = 5;
GameModel movingSphere = modelComponent.LoadGameModel(@"sphere");
//create a spring sim
springSim = new Simulation(this);
//create sim objects from the loaded models
float sphereMass = 1.0f;
movingSphereSimObj = new SimModel(movingSphere, sphereMass, SimObjectType.ACTIVE);
springSim.AddSimObject(movingSphereSimObj);
stationaryCubeSimObj = new SimModel(stationaryCube, 1000.0f, SimObjectType.PASSIVE);
springSim.AddSimObject(stationaryCubeSimObj);
//add in a global force generator: gravity
Gravity gravity = new Gravity(new Vector3(0, -9.81f, 0));
springSim.AddGlobalForceGenerator(gravity);
//add in a global force generator: air
float dragCoefficient = 0.5f;
Medium air = new Medium(dragCoefficient);
springSim.AddGlobalForceGenerator(air);
//attach a spring between the sim objects
float stiffness = 8.0f;
float damping = 0.1f;
springSim.AddSpring(stiffness, damping, stationaryCubeSimObj, movingSphereSimObj);
//create an integrator and assign it to the sim
ForwardEulerIntegrator integrator = new ForwardEulerIntegrator(this);
springSim.Integrator = integrator;
//init the line from cube to sphere that represents the spring
line3DComponent.StartPosition = stationaryCube.Translate;
line3DComponent.EndPosition = movingSphere.Translate;
line3DComponent.Color = Color.White;
}
private void InitChainScene()
{
//chain attributes
int numSegments = 30;
float separation = 0.65f;
//load in segments
GameModel[] segments = new GameModel[numSegments];
for (int i = 0; i < numSegments; i++)
{
segments[i] = modelComponent.LoadGameModel("chainSegment");
//reduce the size of each segment
segments[i].Scale = 0.3f * Vector3.One;
//position each segment downwards incrementally to form the chain
segments[i].TranslateY = -i * separation;
//rotate the even segments by 90 degrees in Y axis
segments[i].RotateY = (i % 2) * 90.0f;
}
//create a chain sim
float totalMass = 1.0f;
float stiffness = 0.3f;
float damping = 0.01f;
chainSim = new ChainSim(this, segments, totalMass, stiffness, damping);
//add in a global force generator: gravity
Gravity gravity = new Gravity(new Vector3(0, -9.81f * 5, 0));
chainSim.AddGlobalForceGenerator(gravity);
//constrain the head point so that we can control it
chainHeadPoint = new PointConstraint(Vector3.Zero, chainSim.SimObjects[0]);
chainSim.Constraints.Add(chainHeadPoint);
//create a integrator and assign it to the sim
float drag = 0.005f;
Integrator integrator = new VerletNoVelocityIntegrator(this, drag);
chainSim.Integrator = integrator;
}
private void InitGoalSoftBodyScene()
{
//cylinder attribute
float length = 10.0f;
float radius = 3.0f;
int lengthSegments = 30;
int radialSegments = 50;
//load in the cylinder
cylinder = new TexturedCylinder(this, length, radius, lengthSegments, radialSegments, "slinky");
cylinder.Initialize();
//load in another same cylinder as the goal
goalCylinder = new TexturedCylinder(this, length, radius, lengthSegments, radialSegments, "checkerboard");
goalCylinder.Initialize();
//create a goal soft body sim
float mass = 0.1f;
float stiffness = 0.03f;
float damping = 0.0f;
goalSoftBodySim = new GoalSoftBodySim(this, cylinder, goalCylinder, mass, stiffness, damping);
//create a force generator that we will use to push the cylinder later
push = new Gravity(Vector3.Zero);
goalSoftBodySim.AddGlobalForceGenerator(push);
//create an integrator and assign it to the sim
float drag = 0.05f;
Integrator integrator = new VerletNoVelocityIntegrator(this, drag);
goalSoftBodySim.Integrator = integrator;
}
