ОК, ребята, у меня проблема с XNA с позиционированием ограничивающей сферы.Клянусь, положение каждого из них абсолютно одинаковое - я даже проверил с помощью отладчика, тем не менее, они появляются в разных направлениях.Я мог бы отрегулировать это вручную, умножив на факторы, чтобы получить это право, но почему этот эффект появляется?Вот код:
Граничная сфера:
protected BoundingSphere CalculateBoundingSphere()
{
BoundingSphere mergedSphere = new BoundingSphere();
BoundingSphere[] boundingSpheres;
int index = 0;
int meshCount = Model.Meshes.Count;
boundingSpheres = new BoundingSphere[meshCount];
foreach (ModelMesh mesh in Model.Meshes)
{
boundingSpheres[index++] = mesh.BoundingSphere;
}
mergedSphere = boundingSpheres[0];
if ((Model.Meshes.Count) > 1)
{
index = 1;
do
{
mergedSphere = BoundingSphere.CreateMerged(mergedSphere,
boundingSpheres[index]);
index++;
} while (index < Model.Meshes.Count);
}
mergedSphere.Center = Position;
return mergedSphere;
}
internal void DrawBoundingSphere(Matrix view, Matrix projection,
GameObject boundingSphereModel)
{
Matrix scaleMatrix = Matrix.CreateScale(BoundingSphere.Radius);
Matrix translateMatrix =
Matrix.CreateTranslation(BoundingSphere.Center);//BoundingSphere.Center CHANGED THISSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
Matrix worldMatrix = scaleMatrix * translateMatrix;
foreach (ModelMesh mesh in boundingSphereModel.Model.Meshes)
{
foreach (BasicEffect effect in mesh.Effects)
{
effect.World = worldMatrix;
effect.View = view;
effect.Projection = projection;
}
mesh.Draw();
}
}
}
Рисование объекта:
class Asteroid : GameObject
{
public bool Destroyed { get; set; }
Vector3 m_Rotations;
public int rotDir;
public Asteroid(int rot)
: base()
{
Destroyed = false;
rotDir = rot;
}
public void LoadContent(ContentManager content, string modelName)
{
Model = content.Load<Model>(modelName);
Position = Vector3.Down;
}
public void update(GameTime gameTime)//for making asteroid spin
{
switch (rotDir)
{
case 0: m_Rotations.Z += (float)gameTime.ElapsedGameTime.TotalSeconds;
break;
case 1: m_Rotations.X += (float)gameTime.ElapsedGameTime.TotalSeconds;
break;
case 2 :m_Rotations.Z += (float)gameTime.ElapsedGameTime.TotalSeconds;
break;
}
}
public void Draw(Matrix view, Matrix projection)
{
BoundingSphere = CalculateBoundingSphere();
//Vector3 pos = BoundingSphere.Center;
Matrix[] transforms = new Matrix[Model.Bones.Count];
Model.CopyAbsoluteBoneTransformsTo(transforms);
Matrix translateMatrix = Matrix.CreateTranslation(Position);//POSITION
Matrix worldMatrix = Matrix.Identity;
worldMatrix *= Matrix.CreateRotationX(m_Rotations.X);//making asteroid spin
worldMatrix *= Matrix.CreateRotationY(m_Rotations.Y);//making asteroid spin
worldMatrix *= Matrix.CreateRotationZ(m_Rotations.Z);//making asteroid spin
worldMatrix *= translateMatrix;
//Matrix worldMatrix = translateMatrix;
if (!Destroyed)
{
foreach (ModelMesh mesh in Model.Meshes)
{
foreach (BasicEffect effect in mesh.Effects)
{
effect.World =
worldMatrix* transforms[mesh.ParentBone.Index]; //MAKE THIS ROTATE
effect.View = view ;
effect.Projection = projection;
effect.EnableDefaultLighting();
effect.PreferPerPixelLighting = true;
}
mesh.Draw();
}
}