//===========================================================================
bool cCamera::select(const int a_windowPosX,
const int a_windowPosY,
const int a_windowWidth,
const int a_windowHeight,
cCollisionRecorder& a_collisionRecorder,
cCollisionSettings& a_collisionSettings)
{
// clear collision recorder
a_collisionRecorder.clear();
// update my m_globalPos and m_globalRot variables
m_parentWorld->computeGlobalPositions(false);
// make sure we have a legitimate field of view
if (fabs(m_fieldViewAngle) < 0.001f) { return (false); }
// compute the ray that leaves the eye point at the appropriate angle
//
// m_fieldViewAngle / 2.0 would correspond to the _top_ of the window
double distCam = (a_windowHeight / 2.0f) / cTanDeg(m_fieldViewAngle / 2.0f);
cVector3d selectRay;
selectRay.set(-distCam,
(a_windowPosX - (a_windowWidth / 2.0f)),
((a_windowHeight / 2.0f) - a_windowPosY));
selectRay.normalize();
selectRay = cMul(m_globalRot, selectRay);
// create a point that's way out along that ray
cVector3d selectPoint = cAdd(m_globalPos, cMul(100000, selectRay));
// search for intersection between the ray and objects in the world
bool result = m_parentWorld->computeCollisionDetection(
m_globalPos,
selectPoint,
a_collisionRecorder,
a_collisionSettings);
// return result
return result;
}
//===========================================================================
bool cCamera::select(const int a_windowPosX,
const int a_windowPosY,
const int a_windowWidth,
const int a_windowHeight,
cCollisionRecorder& a_collisionRecorder,
cCollisionSettings& a_collisionSettings)
{
// sanity check
if ((a_windowWidth <= 0) || (a_windowHeight <= 0)) return (false);
// clear collision recorder
a_collisionRecorder.clear();
// update my m_globalPos and m_globalRot variables
m_parentWorld->computeGlobalPositions(false);
// init variable to store result
bool result = false;
if (m_perspectiveMode)
{
// make sure we have a legitimate field of view
if (fabs(m_fieldViewAngle) < 0.001f) { return (false); }
// compute the ray that leaves the eye point at the appropriate angle
//
// m_fieldViewAngle / 2.0 would correspond to the _top_ of the window
double distCam = (a_windowHeight / 2.0f) / cTanDeg(m_fieldViewAngle / 2.0f);
cVector3d selectRay;
selectRay.set(-distCam,
(a_windowPosX - (a_windowWidth / 2.0f)),
((a_windowHeight / 2.0f) - a_windowPosY));
selectRay.normalize();
selectRay = cMul(m_globalRot, selectRay);
// create a point that's way out along that ray
cVector3d selectPoint = cAdd(m_globalPos, cMul(100000, selectRay));
// search for intersection between the ray and objects in the world
result = m_parentWorld->computeCollisionDetection(
m_globalPos,
selectPoint,
a_collisionRecorder,
a_collisionSettings);
}
else
{
double hw = (double)(a_windowWidth) * 0.5;
double hh = (double)(a_windowHeight)* 0.5;
double aspect = hw / hh;
double offsetX = ((a_windowPosX - hw) / hw) * 0.5 * m_orthographicWidth;
double offsetY =-((a_windowPosY - hh) / hh) * 0.5 * (m_orthographicWidth / aspect);
cVector3d pos = cAdd(m_globalPos,
cMul(offsetX, m_globalRot.getCol1()),
cMul(offsetY, m_globalRot.getCol2()));
// create a point that's way out along that ray
cVector3d selectPoint = cAdd(pos, cMul(100000, cNegate(m_globalRot.getCol0())));
result = m_parentWorld->computeCollisionDetection(pos,
selectPoint,
a_collisionRecorder,
a_collisionSettings);
}
// return result
return (result);
}
