/// <summary>
/// Creer un nuage
/// </summary>
/// <param name="nuage"></param>
/// <param name="init">true s'il s'agit de la creation initiale, false si c'est un
/// recyclage d'un nuage qui est passe derriere la camera</param>
void creerNuage(ref Nuage nuage, bool init)
{
if (nuage == null)
{
nuage = new Nuage();
nuage._particules = new List <Particule>();
}
else
{
nuage._particules.Clear();
}
float rayonNuage = FloatRandom(RAYON_MIN, RAYON_MAX);
nuage.x = FloatRandom(-_tailleCubeX * 50, _tailleCubeX * 50);
nuage.y = _positionNuage * _tailleCubeY * FloatRandom(-RAYON_MIN, RAYON_MAX * 2);
if (init)
{
nuage.z = -FloatRandom(-_zCamera, _tailleCubeZ * 10);
}
else
{
nuage.z = -_tailleCubeZ * 10;
}
// Genere le nuage de facon 'fractale'
_NbParticules = GenereNuage(ref nuage, nuage.x, nuage.y, nuage.z, rayonNuage, TAILLE_PARTICULE, MAX_NIVEAU);
}
/// <summary>
/// Genere recursivement un nuage, pour lui donner son aspect fractal
/// </summary>
/// <param name="nuage"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="z"></param>
/// <param name="rayonNuage"></param>
/// <param name="niveau"></param>
private int GenereNuage(ref Nuage nuage, float x, float y, float z, float rayonNuage, float tailleParticule, int niveau)
{
Particule p = new Particule();
p.x = x;
p.y = y;
p.z = z;
p.taille = FloatRandom(tailleParticule * 0.75f, tailleParticule * 1.5f);
p.alpha = FloatRandom(ALPHA * 0.5f, ALPHA * 2.0f);
p.type = r.Next(0, NB_TEXTURES);
nuage._particules.Add(p);
int res = 1;
if (niveau > 1)
{
for (int i = 0; i < NB_EMBRANCHEMENTS; i++)
{
float AngleX = FloatRandom(0, (float)Math.PI * 2);
float AngleZ = FloatRandom(0, (float)Math.PI * 2);
float distanceCentre = FloatRandom(rayonNuage * 0.2f, rayonNuage);
res += GenereNuage(ref nuage,
x + distanceCentre * 3.0f * (float)Math.Cos(AngleX),
y + distanceCentre * 0.5f * (float)Math.Sin(AngleX),
z + distanceCentre * 2.0f * (float)Math.Sin(AngleZ),
rayonNuage * 0.5f,
tailleParticule * 0.75f,
niveau - 1);
}
}
return(res);
}
void CreateNuage(ref Nuage nuage, bool init)
{
if (nuage == null)
{
nuage = new Nuage();
}
nuage._nbParticules = r.Next(NBPARTICULES_MIN, NBPARTICULES_MAX);
nuage._rayon = FloatRandom(RAYON_MIN, RAYON_MAX);
nuage._centreX = FloatRandom(-_tailleCubeX * 50, _tailleCubeX * 50);
nuage._centreY = _positionNuage * _tailleCubeY * 4; //FloatRandom( _tailleCubeY/2, _tailleCubeY ) ;
if (init)
{
nuage._centreZ = FloatRandom(_zCamera, _tailleCubeZ * 8);
}
else
{
nuage._centreZ = FloatRandom(_tailleCubeZ / 2, _tailleCubeZ * 8);
};
nuage._points = new Vecteur3D[nuage._nbParticules];
nuage._tailles = new float[nuage._nbParticules];
nuage._type = new int[nuage._nbParticules];
for (int i = 0; i < nuage._nbParticules; i++)
{
nuage._points[i] = new Vecteur3D(nuage._centreX + FloatRandom(-nuage._rayon, nuage._rayon),
nuage._centreY + FloatRandom(-nuage._rayon, nuage._rayon),
nuage._centreZ + FloatRandom(-nuage._rayon / 8, nuage._rayon / 8));
nuage._tailles[i] = FloatRandom(TAILLE_PARTICULE_MIN, TAILLE_PARTICULE_MAX);
nuage._type[i] = r.Next(0, 2);
}
}
