public override void UpdateEntity(int entity)
{
CPosition position = (CPosition)positions[entity];
CDimension dimension = (CDimension)dimensions[entity];
partitioner.Insert(new PartitionerEntry(entity, position, dimension));
}
private void Integrate(CPosition position, CKinetic kinetic, Integrator integrator, float deltaTime)
{
switch (integrator)
{
case Integrator.SemiImplictEuler:
SemiImplictEulerIntegration();
break;
case Integrator.VelocityVerlet:
VelocityVerletIntegration();
break;
}
void SemiImplictEulerIntegration()
{
kinetic.Velocity += kinetic.Acceleration * deltaTime;
position.X += kinetic.Velocity.X * deltaTime;
position.Y += kinetic.Velocity.Y * deltaTime;
}
void VelocityVerletIntegration()
{
position.X += kinetic.Velocity.X * deltaTime + 0.5f * kinetic.Acceleration.X * deltaTime * deltaTime;
position.Y += kinetic.Velocity.Y * deltaTime + 0.5f * kinetic.Acceleration.Y * deltaTime * deltaTime;
kinetic.Velocity += kinetic.Acceleration * deltaTime;
}
}
public override void UpdateEntity(int entity)
{
CPosition position = (CPosition)positions[entity];
CDimension dimension = (CDimension)dimensions[entity];
CTransform transform = (CTransform)transforms[entity];
CColor color = (CColor)colors[entity];
vertexBuffer[entity] = new VertexTransformColor(position, dimension, transform, color);
}
public override void UpdateEntity(int entity)
{
CPosition position = (CPosition)positions[entity];
CDimension dimension = (CDimension)dimensions[entity];
CTransform transform = (CTransform)transforms[entity];
List <int> queryResult = binPartitioner.Query(CreateQueryBounds());
if (queryResult.Count == 0)
{
return;
}
SchemaShape2D collisionInformation = SchemaShape2DHelper.CreateShapeSchema(CBoxColliderHelper.ShapeData, position, dimension, transform);
Shape shape = new Shape(collisionInformation);
SchemaShape2D theirCollisionInformation;
Shape theirShape;
CPosition theirPosition;
CDimension theirDimension;
CTransform theirTransform;
for (int i = 0; i < queryResult.Count; i++)
{
if (!scene.EntityContains(queryResult[i], typeof(CTransform), typeof(CBoxCollider)))
{
continue;
}
if (entity == queryResult[i])
{
continue;
}
theirPosition = (CPosition)positions[queryResult[i]];
theirDimension = (CDimension)dimensions[queryResult[i]];
theirTransform = (CTransform)transforms[queryResult[i]];
theirCollisionInformation = SchemaShape2DHelper.CreateShapeSchema(CBoxColliderHelper.ShapeData, theirPosition, theirDimension, theirTransform);
theirShape = new Shape(theirCollisionInformation);
ProcessResolution(CollisionHelper.GetResolution(shape, theirShape));
}
RectangleF CreateQueryBounds()
{
return(new RectangleF(position.X - queryBuffer, position.Y - queryBuffer, dimension.Width + queryBuffer * 2, dimension.Height + queryBuffer * 2));
}
void ProcessResolution(Vector2 resolution)
{
position.X += resolution.X;
position.Y += resolution.Y;
}
}
private void Simultate(int entity)
{
CPosition position = (CPosition)positions[entity];
CKinetic kinetic = (CKinetic)kinetics[entity];
kinetic.Accumulator += (float)(Engine.TotalGameTime - kinetic.LastUpdate).TotalSeconds;
kinetic.LastUpdate = new TimeSpan(Engine.TotalGameTime.Ticks);
while (kinetic.Accumulator >= target)
{
Integrate(position, kinetic, integrator, target);
kinetic.Accumulator -= target;
}
}
public PartitionerEntry(int entity, CPosition position, CDimension dimension)
{
Identifier = entity;
Bounds = new RectangleF(position.X, position.Y, dimension.Width, dimension.Height);
}