bool rayPassesNearOrThrough(const V3d& rayOrigin, const V3d& rayDir) const
{
const double diagRadius = 1.2*bbox.size().length()/2; // Sphere diameter is length of box diagonal
const V3d o2c = bbox.center() - rayOrigin; // vector from rayOrigin to box center
const double l = o2c.length();
if(l < diagRadius)
return true; // rayOrigin lies within bounding sphere
// rayOrigin lies outside of bounding sphere
const double cosA = o2c.dot(rayDir)/l; // cosine of angle between rayDir and vector from origin to center
if(cosA < DBL_MIN)
return false; // rayDir points to side or behind with respect to direction from origin to center of box
const double sinA = sqrt(1 - cosA*cosA); // sine of angle between rayDir and vector from origin to center
return sinA/cosA < diagRadius/l;
}
void View3D::snapToPoint(const Imath::V3d & pos)
{
double snapScale = 0.025;
QString pointInfo;
V3d newPos(0.0,0.0,0.0); //init newPos to origin
if (snapToGeometry(pos, snapScale,
&newPos, &pointInfo))
{
V3d posDiff = newPos - m_prevCursorSnap;
g_logger.info("Selected Point Attributes:\n"
"%s"
"diff with previous = %.3f\n"
"vector diff = %.3f",
pointInfo, posDiff.length(), posDiff);
// Snap cursor /and/ camera to new position
// TODO: Decouple these, but in a sensible way
m_cursorPos = newPos;
m_camera.setCenter(newPos);
m_prevCursorSnap = newPos;
}
}