private bool FinerCheck(Model model1, Matrix world1, Model model2, Matrix world2)
{
if (CoarseCheck(model1, world1, model2, world2) == false)
{
return(false);
}
bool collision = false;
Matrix[] model1Transforms = new Matrix[model1.Bones.Count];
Matrix[] model2Transforms = new Matrix[model2.Bones.Count];
model1.CopyAbsoluteBoneTransformsTo(model1Transforms);
model2.CopyAbsoluteBoneTransformsTo(model2Transforms);
foreach (ModelMesh mesh1 in model1.Meshes)
{
BoundingSphere origSphere1 = mesh1.BoundingSphere;
Matrix trans1 = model1Transforms[mesh1.ParentBone.Index] * world1;
BoundingSphere transSphere1 = XNAUtils.TransformBoundingSphere(origSphere1, trans1);
foreach (ModelMesh mesh2 in model2.Meshes)
{
BoundingSphere origSphere2 = mesh2.BoundingSphere;
Matrix trans2 = model2Transforms[mesh2.ParentBone.Index] * world2;
BoundingSphere transSphere2 = XNAUtils.TransformBoundingSphere(origSphere2, trans2);
if (transSphere1.Intersects(transSphere2))
{
collision = true;
}
}
}
return(collision);
}
private bool RayCollision(Model model, Matrix world, Vector3 lastPosition, Vector3 currentPosition)
{
BoundingSphere modelSpere = (BoundingSphere)model.Tag;
BoundingSphere transSphere = XNAUtils.TransformBoundingSphere(modelSpere, world);
Vector3 direction = currentPosition - lastPosition;
float distanceCovered = direction.Length();
direction.Normalize();
Ray ray = new Ray(lastPosition, direction);
bool collision = false;
float?intersection = ray.Intersects(transSphere);
if (intersection != null)
{
if (intersection <= distanceCovered)
{
collision = true;
}
}
return(collision);
}
private bool CoarseCheck(Model model1, Matrix world1, Model model2, Matrix world2)
{
BoundingSphere origSphere1 = (BoundingSphere)model1.Tag;
BoundingSphere sphere1 = XNAUtils.TransformBoundingSphere(origSphere1, world1);
BoundingSphere origSphere2 = (BoundingSphere)model2.Tag;
BoundingSphere sphere2 = XNAUtils.TransformBoundingSphere(origSphere2, world2);
bool collision = sphere1.Intersects(sphere2);
return(collision);
}
void LoadBoundingSphere()
{
BoundingSphere completeBoundingSphere = new BoundingSphere();
foreach (ModelMesh mesh in _model.Meshes)
{
BoundingSphere origMeshSphere = mesh.BoundingSphere;
BoundingSphere transMeshSphere = XNAUtils.TransformBoundingSphere(origMeshSphere, _boneTransforms[mesh.ParentBone.Index]);
completeBoundingSphere = BoundingSphere.CreateMerged(completeBoundingSphere, transMeshSphere);
}
_model.Tag = completeBoundingSphere;
}
public static Model LoadModelWithBoundingSphere(string asset, ContentManager content)
{
Model newModel = content.Load <Model>(asset);
Matrix[] modelTransforms = new Matrix[newModel.Bones.Count];
newModel.CopyAbsoluteBoneTransformsTo(modelTransforms);
BoundingSphere completeBoundingSphere = new BoundingSphere();
foreach (ModelMesh mesh in newModel.Meshes)
{
BoundingSphere origMeshSphere = mesh.BoundingSphere;
BoundingSphere transMeshSphere = XNAUtils.TransformBoundingSphere(origMeshSphere, modelTransforms[mesh.ParentBone.Index]);
completeBoundingSphere = BoundingSphere.CreateMerged(completeBoundingSphere, transMeshSphere);
}
newModel.Tag = completeBoundingSphere;
return(newModel);
}
