Ejemplo n.º 1
0
	/* special function that returns true only when sphere fully fits inside the frustum. */
	bool PCZFrustum::isFullyVisible(const Sphere& bound) const
	{
		// Check originplane if told to
		if (mUseOriginPlane)
		{
			if (mOriginPlane.getDistance(bound.getCenter()) <= bound.getRadius() ||
				mOriginPlane.getSide(bound.getCenter()) != Plane::POSITIVE_SIDE)
			{
				return false;
			}
		}

		// For each extra active culling plane,
		// see if the sphere is not on the positive side
		// If so, object is not fully visible
		PCPlaneList::const_iterator pit = mActiveCullingPlanes.begin();
		while ( pit != mActiveCullingPlanes.end() )
		{
			PCPlane* plane = *pit;

			if (plane->getDistance(bound.getCenter()) <= bound.getRadius() ||
				plane->getSide(bound.getCenter()) != Plane::POSITIVE_SIDE)
			{
				return false;
			}

			pit++;
		}
		return true;
	}
Ejemplo n.º 2
0
    bool PCZFrustum::isVisible( const Sphere & bound) const
    {
        // Check originplane if told to
        if (mUseOriginPlane)
        {
            Plane::Side side = mOriginPlane.getSide(bound.getCenter());
            if (side == Plane::NEGATIVE_SIDE)
            {
				Real dist = mOriginPlane.getDistance(bound.getCenter());
				if (dist > bound.getRadius())
				{
					return false;
				}
            }
        }

        // For each extra active culling plane, see if the entire sphere is on the negative side
        // If so, object is not visible
        PCPlaneList::const_iterator pit = mActiveCullingPlanes.begin();
        while ( pit != mActiveCullingPlanes.end() )
        {
            PCPlane * plane = *pit;
            Plane::Side xside = plane->getSide(bound.getCenter());
            if (xside == Plane::NEGATIVE_SIDE)
            {
				Real dist = plane->getDistance(bound.getCenter());
				if (dist > bound.getRadius())
				{
					return false;
				}
            }
            pit++;
        }
		return true;
    }