/* (non-Javadoc)
* @see net.sourceforge.arbaro.tree.TraversableTree#traverseTree(net.sourceforge.arbaro.tree.TreeTraversal)
*/
DX_Transformation trunkDirection(DX_Transformation trf, CS_LevelParams lpar)
{
// get rotation angle
double rotangle;
if (lpar.nRotate >= 0)
{ // rotating trunk
trunk_rotangle = (trunk_rotangle + lpar.nRotate + lpar.var(lpar.nRotateV) + 360) % 360;
rotangle = trunk_rotangle;
}
else
{ // alternating trunks
if (Math.Abs(trunk_rotangle) != 1)
{
trunk_rotangle = 1;
}
trunk_rotangle = -trunk_rotangle;
rotangle = trunk_rotangle * (180 + lpar.nRotate + lpar.var(lpar.nRotateV));
}
// get downangle
double downangle;
downangle = lpar.nDownAngle + lpar.var(lpar.nDownAngleV);
return(trf.rotxz(downangle, rotangle));
}
/**
* Calcs the direction of a substem from the parameters
*
* @param trf The transformation of the current stem segment
* @param offset The offset of the substem from the base of the currents stem
* @return The direction of the substem
*/
DX_Transformation substemDirection(DX_Transformation trf, float offset)
{
CS_LevelParams lpar_1 = par.getLevelParams(stemlevel + 1);
//lev = min(level+1,3);
// get rotation angle
float rotangle;
if (lpar_1.nRotate >= 0)
{ // rotating substems
substemRotangle = (substemRotangle + lpar_1.nRotate + lpar_1.var(lpar_1.nRotateV) + 360) % 360;
rotangle = substemRotangle;
}
else
{ // alternating substems
if (Math.Abs(substemRotangle) != 1)
{
substemRotangle = 1;
}
substemRotangle = -substemRotangle;
rotangle = substemRotangle * (180 + lpar_1.nRotate + lpar_1.var(lpar_1.nRotateV));
}
// get downangle
float downangle;
if (lpar_1.nDownAngleV >= 0)
{
downangle = lpar_1.nDownAngle + lpar_1.var(lpar_1.nDownAngleV);
}
else
{
float len = (stemlevel == 0) ? length * (1 - par.BaseSize) : length;
downangle = lpar_1.nDownAngle +
lpar_1.nDownAngleV * (1 - 2 * par.getShapeRatio((length - offset) / len, 0));
}
/*
* if (Console.debug())
* DBG("Stem.substem_direction(): down: "+downangle+" rot: "+rotangle);
*/
return(trf.rotxz(downangle, rotangle));
}