private void MoveSpirals()
{
TVertex SpiralPos = new TVertex(0, 0, 0);
for (int i = 0; i < NUM_SPIRALS; i++)
{
if (Spirals[i].Visible)
{
SpiralPos = Spirals[i].GetPos();
if (SpiralDirection[i]) //spiral go right
{
SpiralPos.X += SPIRAL_MOVE_STEP;
if (SpiralPos.X > STAIR_LENGTH / 2 - SPIRAL_RADIUS) //spiral go left
{
SpiralDirection[i] = false;
}
}
else //spiral go left
{
SpiralPos.X -= SPIRAL_MOVE_STEP;
if (SpiralPos.X < -STAIR_LENGTH / 2 + SPIRAL_RADIUS) //spiral go right
{
SpiralDirection[i] = true;
}
}
SpiralPos.Y += STAIRS_Y_FACTOR;
SpiralPos.Z -= MOVE_DELTA;
SpiralAngle[i] = (SpiralAngle[i] + TURN_ANGLE) % 360;
int direction = 1;
if (i % 2 == 1)
{
direction = -1;
}
Spirals[i].SetPosAndAngle(SpiralPos.X, SpiralPos.Y, SpiralPos.Z, 0, Math3D.Deg2Rad(direction * SpiralAngle[i]), 0);
}//for
}
}