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Fixes for MouseFocusSensor: (bug 1165)

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1. Do the ray cast properly (from the near plane to the far clip plane)
2. Loop over invisible objects (sensors)
This commit is contained in:
Kester Maddock 2004-04-24 06:36:55 +00:00
parent 3a2194a534
commit a46f456e92
1 changed files with 77 additions and 31 deletions
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108
source/gameengine/Ketsji/KX_MouseFocusSensor.cpp
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@ -55,6 +55,7 @@
#include "SM_Object.h"
#include "SM_Scene.h"
#include "SumoPhysicsEnvironment.h"
#include "KX_SumoPhysicsController.h"
/* ------------------------------------------------------------------------- */
/* Native functions */
@ -183,8 +184,8 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
* _should_ be wrong! */
/* old: */
float nearclip = 0.0;
float farclip = -1.0;
float nearclip = 0.0;
float farclip = 1.0;
/* build the from and to point in normalised device coordinates
* Looks like normailized device coordinates are [-1,1] in x [-1,1] in y
@ -193,17 +194,16 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
* The actual z coordinates used don't have to be exact just infront and
* behind of the near and far clip planes.
*/
MT_Vector4 frompoint = MT_Vector4(
(2 * (m_x-x_lb) / width) - 1.0,
1.0 - (2 * (m_y - y_lb) / height),
(nearclip + 3 * farclip) / (farclip - nearclip),
nearclip,
1.0
);
MT_Vector4 topoint = MT_Vector4(
(2 * (m_x-x_lb) / width) - 1.0,
1.0 - (2 * (m_y-y_lb) / height),
(3 * nearclip + farclip) / (farclip - nearclip),
farclip,
1.0
);
@ -240,37 +240,83 @@ bool KX_MouseFocusSensor::ParentObjectHasFocus(void)
SumoPhysicsEnvironment *spe = dynamic_cast<SumoPhysicsEnvironment* > (m_kxscene->GetPhysicsEnvironment());
SM_Scene *sumoScene = spe->GetSumoScene();
KX_SumoPhysicsController *spc = dynamic_cast<KX_SumoPhysicsController*> (cam->GetPhysicsController());
SM_Object *sumoCam = spc?spc->GetSumoObject():NULL;
MT_Vector3 todir = topoint3 - frompoint3;
if (todir.dot(todir) < MT_EPSILON)
return false;
todir.normalize();
SM_Object* hitSMObj = sumoScene->rayTest(NULL,
frompoint3,
topoint3,
resultpoint,
resultnormal);
/* all this casting makes me nervous... */
KX_ClientObjectInfo* client_info
= ( hitSMObj ?
(KX_ClientObjectInfo*) ((SM_Object*)hitSMObj)->getClientObject() :
NULL);
KX_GameObject* hitKXObj = ( client_info ?
(KX_GameObject*)client_info->m_clientobject :
NULL);
while (true)
{
SM_Object* hitSMObj = sumoScene->rayTest(sumoCam,
frompoint3,
topoint3,
resultpoint,
resultnormal);
if (!hitSMObj)
return false;
/* all this casting makes me nervous... */
KX_ClientObjectInfo* client_info
= ( hitSMObj ?
(KX_ClientObjectInfo*) hitSMObj->getClientObject() :
NULL);
if (!client_info)
{
std::cout<< "WARNING: MouseOver sensor " << GetName() << " cannot sense SM_Object " << hitSMObj << " - no client info.\n" << std::endl;
return false;
}
/* Is this me? In the ray test, there are a lot of extra checks
* for aliasing artefacts from self-hits. That doesn't happen
* here, so a simple test suffices. Or does the camera also get
* self-hits? (No, and the raysensor shouldn't do it either, since
* self-hits are excluded by setting the correct ignore-object.)
* Hitspots now become valid. */
if (hitKXObj == thisObj)
{
m_hitPosition = resultpoint;
m_hitNormal = resultnormal;
res = true;
KX_GameObject* hitKXObj = (KX_GameObject*)client_info->m_clientobject;
if (client_info->m_type > KX_ClientObjectInfo::ACTOR)
{
// false hit
KX_SumoPhysicsController *hitspc = dynamic_cast<KX_SumoPhysicsController *> (static_cast<KX_GameObject*> (hitKXObj) ->GetPhysicsController());
if (hitspc)
{
/* We add 0.01 of fudge, so that if the margin && radius == 0., we don't endless loop. */
MT_Scalar marg = 0.01 + hitspc->GetSumoObject()->getMargin();
if (hitspc->GetSumoObject()->getShapeProps())
{
marg += 2*hitspc->GetSumoObject()->getShapeProps()->m_radius;
}
/* Calculate the other side of this object */
MT_Point3 hitObjPos;
hitspc->GetWorldPosition(hitObjPos);
MT_Vector3 hitvector = hitObjPos - resultpoint;
if (hitvector.dot(hitvector) > MT_EPSILON)
{
hitvector.normalize();
marg *= 2.*todir.dot(hitvector);
}
frompoint3 = resultpoint + marg * todir;
} else {
return false;
}
continue;
}
/* Is this me? In the ray test, there are a lot of extra checks
* for aliasing artefacts from self-hits. That doesn't happen
* here, so a simple test suffices. Or does the camera also get
* self-hits? (No, and the raysensor shouldn't do it either, since
* self-hits are excluded by setting the correct ignore-object.)
* Hitspots now become valid. */
if (hitKXObj == thisObj)
{
m_hitPosition = resultpoint;
m_hitNormal = resultnormal;
return true;
}
return false;
}
return res;
return false;
}
/* ------------------------------------------------------------------------- */