public SpaceShip(CollisionDetection cd, Vector3 position)
{
_boundingCube = cd.BoudingCube;
_oldKeyState = Keyboard.GetState();
_model = cd.Content.Load <Model>("Models\\ShipModel");
_hullModel = cd.Content.Load <Model>("Models\\ShipHull");
_modelTransforms = new Matrix[_model.Bones.Count];
_hullTransforms = new Matrix[_hullModel.Bones.Count];
_position = position;
_direction = //Vector3.Zero;
new Vector3(
((float)cd.Random.NextDouble() - 0.5f) * Speed,
((float)cd.Random.NextDouble() - 0.5f) * Speed,
((float)cd.Random.NextDouble() - 0.5f) * Speed);
//initial rotation
_rotation = new Rotation(cd.Random);
#region creating bounding ball
{
var meshPart = _model.Meshes[0].MeshParts[0];
var vpnt = new VertexPositionNormalTexture[meshPart.VertexBuffer.VertexCount];
meshPart.VertexBuffer.GetData <VertexPositionNormalTexture>(vpnt);
var vertices = new Vector3[vpnt.Length];
for (int i = 0; i < vpnt.Length; i++)
{
vertices[i] = Vector3.Transform(vpnt[i].Position, Scale);
}
CollisionSphere = new BoundingBall(cd, vertices, this);
}
#endregion
#region make hullobject for GJK
//loop through each mesh of hull
ShipHulls = new List <Hull>();
foreach (var hullmesh in _hullModel.Meshes)
{
List <Vector3> hull_vertices = new List <Vector3>();
//now get the vertices and make a hull object and add it to shiphull list
foreach (var mparts in hullmesh.MeshParts)
{
int vertexStride = mparts.VertexBuffer.VertexDeclaration.VertexStride;
var vpnt_hull = new VertexPositionNormalTexture[mparts.NumVertices];
mparts.VertexBuffer.GetData <VertexPositionNormalTexture>(vpnt_hull);
for (int k = 0; k < mparts.NumVertices; k++)
{
hull_vertices.Add(vpnt_hull[k].Position);
}
}
//how that i have all the vertices in a hull
//let me add that to ship hull with index number
ShipHulls.Add(new Hull(hull_vertices, Size, hullmesh.ParentBone.Index, _rotation));
}
#endregion
#region rearrange hulls
Shuffle(ShipHulls);
#endregion
}
public bool Collides(BoundingBall bv)
{
// For a normalized plane (|p.n| = 1), evaluating the plane equation
// for a point gives the signed distance of the point to the plane
float distance = Vector3.Dot(bv.Center, _normal) - _distanceFromOrigin;
// If sphere center within +/-radius from plane, plane intersects sphere
return(Math.Abs(distance) <= bv.Radius);
}
public bool Collides(BoundingBall bv)
{
foreach (var boundary in _boundaries)
{
if (boundary.Collides(bv))
{
return(true);
}
}
return(false);
}
public bool Intersects(BoundingBall that)
{
// We compute the distanace squred to avoid the expensive squred root calculation
Vector3 distance = this.Center - that.Center;
float distaceSquared = Vector3.Dot(distance, distance);
float radiiSumSquared = this.Radius + that.Radius;
// Need the square of the radius since we use the squre of the distance
radiiSumSquared *= radiiSumSquared;
// Checking bounding volumes for collision
return(distaceSquared <= radiiSumSquared);
}
