void RotationCarre(float x,float y,float angle,float Rayon, ML_Color color)
/* Centre abscisse , Centre Ordonné, angle theta, cotéducarré/2 */
{
 float pos[2] = {1,1};
 float angleVector[2] = {1,1};
 float xVertex[4];
 float yVertex[4];
 pos[0] = x;
 pos[1] = y;
 angle = angle*3.14159/180;
 angleVector[0] = Rayon * cos(angle);
 angleVector[1] = -Rayon * sin(angle);

xVertex[0] = pos[0] + angleVector[0] - angleVector[1];
xVertex[1] = pos[0] + angleVector[0] + angleVector[1];
xVertex[2] = pos[0] - angleVector[0] + angleVector[1];
xVertex[3] = pos[0] - angleVector[0] - angleVector[1];

 yVertex[0] = pos[1] + angleVector[0] + angleVector[1];
 yVertex[1] = pos[1] - angleVector[0] + angleVector[1];
 yVertex[2] = pos[1] - angleVector[0] - angleVector[1];
 yVertex[3] = pos[1] + angleVector[0] - angleVector[1];

 ML_polygon(xVertex,yVertex,4,ML_BLACK);
}