/// <summary>
/// Returns True if any of this BoundingPart's BoundingSpheres collide with the given BoundingPart's.
/// </summary>
/// <param name="boundingPart"></param>
/// <returns></returns>
public bool Intersects(BoundingPart boundingPart)
{
//For optimization we will only bother checking for collisions if the proximitySphere shows a collision.
if (this.ProximitySphereTransformed.Intersects(boundingPart.ProximitySphereTransformed))
{
//the actual collision spheres may not have been transformed yet.
if (!_spheresTransformed)
{
TransformSpheres();
}
if (!boundingPart.SpheresTransformed)
{
boundingPart.TransformSpheres();
}
foreach (BoundingSphere thisBS in _boundingSpheresTransformed)
{
foreach (BoundingSphere otherBS in boundingPart.BoundingSpheresTransformed)
{
if (thisBS.Intersects(otherBS))
{
return(true);
}
}
}
return(false);
}
else
{
return(false);
}
}
public void CreateMeshInfo(XnaModel model)
{
_modelBoundingParts = new BoundingPartList();
//Matrix[] modelBoneTransforms = new Matrix[model.Bones.Count];
modelBoneTransforms = new Matrix[model.Bones.Count];
model.CopyAbsoluteBoneTransformsTo(modelBoneTransforms);
BoundingSphere[] pieces = new BoundingSphere[1];
foreach (ModelMesh mesh in model.Meshes)
{
BoundingPart boundingPart =
new BoundingPart(mesh.BoundingSphere, pieces, modelBoneTransforms[mesh.ParentBone.Index],
mesh.Name, Color.White);
_modelBoundingParts.Add(boundingPart);
}
}
private void Load(XnaModel model, string contentName)
{
_modelBoundingParts = new BoundingPartList();
Matrix[] modelBoneTransforms = new Matrix[model.Bones.Count];
model.CopyAbsoluteBoneTransformsTo(modelBoneTransforms);
XmlDocument meshInfo = new XmlDocument();
if (File.Exists(string.Format(@".\MeshInfo\{0}.xml", contentName)))
{
meshInfo.Load(string.Format(@".\MeshInfo\{0}.xml", contentName));
}
if ((!meshInfo.DocumentElement.HasAttributes) || (meshInfo.DocumentElement.Attributes["scaleModifier"] == null))
{
_scaleModifier = 1f;
}
else
{
_scaleModifier = float.Parse(meshInfo.DocumentElement.Attributes["scaleModifier"].Value);
}
int meshIndex = 0;
foreach (ModelMesh mesh in model.Meshes)
{
string xpath = string.Format("/MeshInfo/MeshPart[@id='{0}']", mesh.Name);
XmlNode meshInfoPart = meshInfo.SelectSingleNode(xpath);
XmlNodeList meshInfoBoundingParts = null;
if (meshInfoPart != null)
{
xpath = "BoundingParts/BoundingPart";
meshInfoBoundingParts = meshInfoPart.SelectNodes(xpath);
}
if ((meshInfoBoundingParts != null) && (meshInfoBoundingParts.Count > 0))
{
BoundingSphere[] pieces = new BoundingSphere[meshInfoBoundingParts.Count];
int pieceIndex = 0;
Color boundingPartColour = new Color(byte.Parse(meshInfoPart.Attributes["color.bounds.r"].Value),
byte.Parse(meshInfoPart.Attributes["color.bounds.g"].Value),
byte.Parse(meshInfoPart.Attributes["color.bounds.b"].Value));
foreach (XmlNode subdivisionNode in meshInfoBoundingParts)
{
float x0 = float.Parse(subdivisionNode.Attributes["x"].Value);
float y0 = float.Parse(subdivisionNode.Attributes["y"].Value);
float z0 = float.Parse(subdivisionNode.Attributes["z"].Value);
float w0 = float.Parse(subdivisionNode.Attributes["w"].Value);
Vector4 subdivision = new Vector4(x0, y0, z0, w0);
//Determine the new BoundingSphere's Radius
float radius = subdivision.W * mesh.BoundingSphere.Radius;
//Determine the new BoundingSphere's Center by interpolating.
//The subdivision's X, Y, Z represent percentages in each axis.
//They will used across the full diameter of XNA's "default" BoundingSphere.
float x =
MathHelper.Lerp(mesh.BoundingSphere.Center.X - mesh.BoundingSphere.Radius,
mesh.BoundingSphere.Center.X + mesh.BoundingSphere.Radius, subdivision.X);
float y =
MathHelper.Lerp(mesh.BoundingSphere.Center.Y - mesh.BoundingSphere.Radius,
mesh.BoundingSphere.Center.Y + mesh.BoundingSphere.Radius, subdivision.Y);
float z =
MathHelper.Lerp(mesh.BoundingSphere.Center.Z - mesh.BoundingSphere.Radius,
mesh.BoundingSphere.Center.Z + mesh.BoundingSphere.Radius, subdivision.Z);
Vector3 center = new Vector3(x, y, z);
pieces[pieceIndex] = new BoundingSphere(center, radius);
pieceIndex++;
}
BoundingPart boundingPart =
new BoundingPart(mesh.BoundingSphere, pieces, modelBoneTransforms[mesh.ParentBone.Index],
mesh.Name, boundingPartColour);
_modelBoundingParts.Add(boundingPart);
}
meshIndex++;
}
}
public BoundingPart Clone()
{
BoundingPart clone = new BoundingPart(_proximitySphere, _boundingSpheres.ToArray(), _boneTransform, _name, _color);
return(clone);
}
public bool DetectCollision(BoundingPart boundingPart)
{
return(_modelBoundingParts.Intersects(boundingPart));
}
