//========================================================================================
// geCamera_ScreenPointToWorld
//========================================================================================
GENESISAPI void GENESISCC geCamera_ScreenPointToWorld ( const geCamera *Camera,
int32 ScreenX,
int32 ScreenY,
geVec3d *Vector)
// Takes a screen X and Y pair, and a camera and generates a vector pointing
// in the direction from the camera position to the screen point.
{
geVec3d In,Left,Up;
geVec3d ScaledIn,ScaledLeft,ScaledUp ;
geFloat XCenter ;
geFloat YCenter ;
geFloat Scale ;
const geXForm3d *pM;
pM = &(Camera->TransposeXForm);
XCenter = Camera->XCenter ;
YCenter = Camera->YCenter ;
Scale = Camera->Scale ;
geXForm3d_GetIn( pM, &In ) ;
geXForm3d_GetLeft( pM, &Left ) ;
geXForm3d_GetUp( pM, &Up ) ;
geVec3d_Scale(&In, Scale, &ScaledIn);
geVec3d_Scale(&Left, XCenter - ((geFloat)ScreenX), &ScaledLeft );
geVec3d_Scale(&Up, YCenter - ((geFloat)ScreenY), &ScaledUp );
geVec3d_Copy(&ScaledIn, Vector);
geVec3d_Add(Vector, &ScaledLeft, Vector );
geVec3d_Add(Vector, &ScaledUp, Vector );
geVec3d_Normalize(Vector);
}
//=====================================================================================
// FixFaceTJunctions
//=====================================================================================
geBoolean FixFaceTJunctions(GBSP_Node *Node, GBSP_Face *Face)
{
int32 i, P1, P2;
int32 Start[MAX_TEMP_INDEX_VERTS];
int32 Count[MAX_TEMP_INDEX_VERTS];
geVec3d Edge2;
geFloat Len;
int32 Base;
NumTempIndexVerts = 0;
for (i=0; i< Face->NumIndexVerts; i++)
{
P1 = Face->IndexVerts[i];
P2 = Face->IndexVerts[(i+1)%Face->NumIndexVerts];
EdgeStart = WeldedVerts[P1];
Edge2 = WeldedVerts[P2];
FindEdgeVerts(&EdgeStart, &Edge2);
geVec3d_Subtract(&Edge2, &EdgeStart, &EdgeDir);
Len = geVec3d_Normalize(&EdgeDir);
Start[i] = NumTempIndexVerts;
TestEdge_r(0.0f, Len, P1, P2, 0);
Count[i] = NumTempIndexVerts - Start[i];
}
if (NumTempIndexVerts < 3)
{
Face->NumIndexVerts = 0;
//GHook.Printf("FixFaceTJunctions: Face collapsed.\n");
return GE_TRUE;
}
for (i=0 ; i<Face->NumIndexVerts; i++)
{
if (Count[i] == 1 && Count[(i+Face->NumIndexVerts-1)%Face->NumIndexVerts] == 1)
break;
}
if (i == Face->NumIndexVerts)
{
Base = 0;
}
else
{ // rotate the vertex order
Base = Start[i];
}
if (!FinalizeFace(Face, Base))
return GE_FALSE;
return GE_TRUE;
}
/* ------------------------------------------------------------------------------------ */
int CPathFollower::GetDirectionVector(const geVec3d &LookFrom, const geVec3d &LookAt,
geVec3d *theDirectionVector)
{
geVec3d_Subtract(&LookAt, &LookFrom, theDirectionVector);
geVec3d_Normalize(theDirectionVector);
return RGF_SUCCESS;
}
//================================================================================
// Frustum_SetFromPoly
// Create a frustum looking through a poly (from the origin)
//================================================================================
geBoolean Frustum_SetFromPoly(Frustum_Info *Info, geVec3d *Verts, int32 NumVerts, geBoolean Flip)
{
int32 NextVert;
geVec3d *pVert1, *pVert2, Vect;
GFX_Plane *Planes;
int32 i;
if (NumVerts >= MAX_FCP)
return GE_FALSE; // Too many planes!!!
Planes = Info->Planes;
Info->NumPlanes = 0;
for (i=0; i< NumVerts; i++)
{
NextVert = ((i+1) < NumVerts) ? (i+1) : 0;
pVert1 = &Verts[i];
pVert2 = &Verts[NextVert];
if (geVec3d_Compare(pVert1, pVert2, 0.1f)) // Coplanar edge...
continue; // Coplanar edges will cause a plane to be duplicated, skip it or it will screw up
// the clipping stage of the frustum created from this poly...
geVec3d_Subtract(pVert1, pVert2, &Vect);
if (Flip)
geVec3d_CrossProduct(pVert2, &Vect, &Planes->Normal);
else
geVec3d_CrossProduct(&Vect, pVert2, &Planes->Normal);
geVec3d_Normalize(&Planes->Normal);
Planes->Dist = 0.0f;
Planes->Type = PLANE_ANY;
Planes++;
Info->NumPlanes++;
}
// Get BBox info for fast BBox rejection against frustum...
SetUpFrustumBBox(Info);
return GE_TRUE;
}
//====================================================================================
// gePlane_SetFromVerts
//====================================================================================
void gePlane_SetFromVerts(GFX_Plane *Plane, const geVec3d *V1, const geVec3d *V2, const geVec3d *V3)
{
geVec3d Vect1, Vect2;
// Get the 2 vectors to derive the normal
geVec3d_Subtract(V1, V2, &Vect1);
geVec3d_Subtract(V3, V2, &Vect2);
// The normal is the cross between these 2 vectors
geVec3d_CrossProduct(&Vect1, &Vect2, &Plane->Normal);
geVec3d_Normalize(&Plane->Normal);
// Get the planes distance from the origin, by projecting a vert on the plane
// along the plane normal, to the origin...
Plane->Dist = geVec3d_DotProduct(V1, &Plane->Normal);
// Finally, get the plane type
Plane->Type = PLANE_ANY;
}
//================================================================================
// Frustum_SetFromCamera
//================================================================================
void Frustum_SetFromCamera(Frustum_Info *Info, geCamera *Camera)
{
geFloat s, c, ZFar;
geBoolean ZFarEnable;
geVec3d Normal;
int32 i;
// changed QD Clipping
geFloat ZScale;
geCamera_GetViewAngleXSinCos(Camera,&s,&c);
// Left clip plane
Normal.X = s;
Normal.Y = 0.0f;
Normal.Z = -c;
geVec3d_Normalize(&Normal);
Info->Planes[0].Normal = Normal;
// Right clip plane
Normal.X = -s;
geVec3d_Normalize(&Normal);
Info->Planes[1].Normal = Normal;
geCamera_GetViewAngleYSinCos(Camera,&s,&c);
// Bottom clip plane
Normal.X = 0.0f;
Normal.Y = s;
Normal.Z = -c;
geVec3d_Normalize(&Normal);
Info->Planes[2].Normal = Normal;
// Top clip plane
Normal.Y = -s;
geVec3d_Normalize(&Normal);
Info->Planes[3].Normal = Normal;
// changed QD Clipping
/* Info->NumPlanes = 4;
// Clear all distances
for (i=0; i<Info->NumPlanes; i++)
{
Info->Planes[i].Dist = 0.0f;
Info->Planes[i].Type = PLANE_ANY;
}
// Check to see if we need to use a far clip plane
geCamera_GetFarClipPlane(Camera, &ZFarEnable, &ZFar);
if (ZFarEnable)
{
geFloat ZScale;
ZScale = geCamera_GetZScale(Camera);
// Far clip plane
Normal.X = 0.0f;
Normal.Y = 0.0f;
Normal.Z = 1.0f;
geVec3d_Normalize(&Normal);
Info->Planes[4].Normal = Normal;
Info->Planes[4].Dist = -(ZFar/ZScale);
Info->Planes[4].Type = PLANE_ANY;
Info->NumPlanes = 5;
}
/**/
Normal.X = 0.0f;
Normal.Y = 0.0f;
Normal.Z = -1.0f;
Info->Planes[4].Normal = Normal;
Info->NumPlanes = 5;
// Clear all distances
for (i=0; i<Info->NumPlanes; i++)
{
Info->Planes[i].Dist = 0.0f;
Info->Planes[i].Type = PLANE_ANY;
}
ZScale = geCamera_GetZScale(Camera);
Info->Planes[4].Dist = (2.0f/ZScale);
// Check to see if we need to use a far clip plane
geCamera_GetFarClipPlane(Camera, &ZFarEnable, &ZFar);
if(ZFarEnable)
{
// Far clip plane
Normal.X = 0.0f;
Normal.Y = 0.0f;
Normal.Z = 1.0f;
geVec3d_Normalize(&Normal);
Info->Planes[5].Normal = Normal;
Info->Planes[5].Dist = -(ZFar/ZScale);
Info->Planes[5].Type = PLANE_ANY;
Info->NumPlanes = 6;
}
// end change
// Get BBox info for fast BBox rejection against frustum...
SetUpFrustumBBox(Info);
}
/* ------------------------------------------------------------------------------------ */
int CPathFollower::GetNextPosition(const char *szEntityName, geVec3d *NextPosition,
bool YLocked)
{
geEntity_EntitySet *pSet;
geEntity *pEntity;
int nResult;
geVec3d thePos, temp, DirectionVector;
// Ok, check to see if there are path followers in this world
pSet = geWorld_GetEntitySet(CCD->World(), "PathFollower");
if(!pSet)
return RGF_FAILURE; // No path followers
// Ok, dig through 'em all.
for(pEntity=geEntity_EntitySetGetNextEntity(pSet, NULL); pEntity;
pEntity=geEntity_EntitySetGetNextEntity(pSet, pEntity))
{
PathFollower *pFollower = (PathFollower*)geEntity_GetUserData(pEntity);
if(strcmp(pFollower->EntityName, szEntityName) != 0)
continue; // Keep looking
// Ok, it's this entity. Let's set the return position to the
// ..current position in case we aren't moving
*NextPosition = pFollower->CurrentPosition;
// Compute the # of milliseconds since we last moved, then use that
// ..to compute the distance we've travelled in that period
geFloat nMotionTime = (CCD->FreeRunningCounter_F() - pFollower->LastMotionTick);
if(nMotionTime > 100.0f)
nMotionTime = 100.0f; // In case of stalls elsewhere
geFloat fDistance = nMotionTime * (pFollower->Speed * 0.001f); // / 1000.0f);
pFollower->TimeInMotion += nMotionTime;
pFollower->LastMotionTick = CCD->FreeRunningCounter_F();
if(pFollower->bMoving == GE_FALSE)
return RGF_SUCCESS; // Current position is good
if(pFollower->bReady == GE_FALSE)
return RGF_SUCCESS; // Disabled, use current position
switch(pFollower->CurrentNodeType)
{
// For both start and waypoints, we're going to compute the new
// position the same way (since they're both target-based motion).
case RGF_POINT_TYPE_START:
case RGF_POINT_TYPE_WAY:
// Ok, we're moving. What we need to do is perform a new position
// ..computation based on the entities speed on the path and the
// ..vector towards the current target, if not a ranged point. First,
// ..compute the direction vector towards the current target
geVec3d_Subtract(&pFollower->CurrentTarget, &pFollower->CurrentPosition, &DirectionVector);
geVec3d_Normalize(&DirectionVector);
geVec3d_Scale(&DirectionVector, fDistance, &DirectionVector);
// Fine, DirectionVector now contains a displacement from the current
// ..position of the bound entity towards the target node.
if(YLocked)
DirectionVector.Y = 0.0f; // Stomp on Y vector value
temp.X = pFollower->CurrentPosition.X + DirectionVector.X;
temp.Y = pFollower->CurrentPosition.Y + DirectionVector.Y;
temp.Z = pFollower->CurrentPosition.Z + DirectionVector.Z;
break;
case RGF_POINT_TYPE_RANGED:
// Ranged points are somewhat different. We're basically constraining
// ..random motion to a sphere (if not YLocked) of space in which the
// ..bound entity randomly moves about. What we'll do is randomly
// ..pick a target point in the range sphere every <n> seconds and
// ..have the entity move towards that point.
if(pFollower->TimeInMotion > pFollower->RandomRollTime)
{
// Compute a new random target in the range sphere.
srand(CCD->FreeRunningCounter());
geVec3d RandomPosition;
RandomPosition.X = (geFloat)(rand() % (int)pFollower->PointRange);
if(rand()%2 == 1)
RandomPosition.X = -(RandomPosition.X);
RandomPosition.Y = (geFloat)(rand() % (int)pFollower->PointRange);
if(rand()%2 == 1)
RandomPosition.Y = -(RandomPosition.Y);
RandomPosition.Z = (geFloat)(rand() % (int)pFollower->PointRange);
if(rand()%2 == 1)
RandomPosition.Z = -(RandomPosition.Z);
RandomPosition.X += pFollower->PathOrigin.X;
RandomPosition.Y += pFollower->PathOrigin.Y;
RandomPosition.Z += pFollower->PathOrigin.Z;
pFollower->CurrentTarget = RandomPosition;
pFollower->TimeInMotion = 0.0f; // Clear re-seek time
}
// From here on in, the code is identical to the target-seeking
// ..computations performed for way an start points.
geVec3d_Subtract(&pFollower->CurrentTarget, &pFollower->CurrentPosition, &DirectionVector);
geVec3d_Normalize(&DirectionVector);
geVec3d_Scale(&DirectionVector, fDistance, &DirectionVector);
// Fine, DirectionVector now contains a displacement from the current
// ..position of the bound entity towards the target node.
if(YLocked)
DirectionVector.Y = 0.0f; // Stomp on Y vector value
temp.X = pFollower->CurrentPosition.X + DirectionVector.X;
temp.Y = pFollower->CurrentPosition.Y + DirectionVector.Y;
temp.Z = pFollower->CurrentPosition.Z + DirectionVector.Z;
break;
}
// Ok, we have a new point to move to! Let's do a basic ray
// ..collision test so we can first-level cull any motion
if(pFollower->CollisionTest == GE_TRUE)
{
nResult = CCD->Collision()->CheckForCollision(NULL, NULL,
pFollower->CurrentPosition, temp);
if(nResult)
return RGF_SUCCESS; // Don't move, we collided.
}
// Fine, no collisions. Let's check to see if (a) we're not on a
// ..ranged point and (b) if we're within 1 world unit of the target
// ..point. If we pass those tests, we will reset the target to the
// ..next target point.
*NextPosition = temp; // Copy out for use
pFollower->CurrentPosition = *NextPosition;
if(pFollower->CurrentNodeType == RGF_POINT_TYPE_RANGED)
return RGF_SUCCESS; // Done all we need to do, bail this.
if(geVec3d_DistanceBetween(&pFollower->CurrentPosition, &pFollower->CurrentTarget) <= pFollower->Speed)
{
// Move to the NEXT path point, based on our direction
if(pFollower->bForward == GE_TRUE)
{
// Get next pathpoint
nResult = CCD->PathDatabase()->NextPoint(pFollower->PathHandle, &thePos);
if(nResult == RGF_NO_NEXT)
{
// No next point is END OF PATH. Fine, if looping motion, let's
// ..switch directions - otherwise shut down the motion.
if(pFollower->MotionLoops)
{
if(pFollower->Reverse)
pFollower->bForward = GE_FALSE; // Switch direction
else
{
CCD->PathDatabase()->Rewind(pFollower->PathHandle, &thePos);
pFollower->CurrentTarget = thePos;
}
}
else
{
pFollower->bReady = GE_FALSE; // End of motion
pFollower->bMoving = GE_FALSE; // Don't move any more!
}
}
else
{
// All be cool, set our target tot he new point
pFollower->CurrentTarget = thePos;
}
}
else
{
// Get previous pathpoint
nResult = CCD->PathDatabase()->PreviousPoint(pFollower->PathHandle, &thePos);
if(nResult == RGF_NO_PREVIOUS)
{
// No previous point is START OF PATH. Fine, if looping motion, let's
// ..switch directions - otherwise shut down the motion.
if(pFollower->MotionLoops)
pFollower->bForward = GE_TRUE; // Switch direction
else
{
pFollower->bReady = GE_FALSE; // End of motion
pFollower->bMoving = GE_FALSE; // Don't move any more!
}
}
else
{
// All be cool, set our target tot he new point
pFollower->CurrentTarget = thePos;
}
}
}
// All done, new point back to caller
return RGF_SUCCESS;
}
// Entity not bound, return failure.
return RGF_FAILURE;
}
/* ------------------------------------------------------------------------------------ */
Procedural* Particles_Create(char *TextureName, geWorld *World, const char *InputParams)
{
Procedural *Proc;
int i;
char ParamWork[8192],*pstr;
geBitmap *ppBitmap;
Proc = GE_RAM_ALLOCATE_STRUCT(Procedural);
if(!Proc)
return (Procedural*)NULL;
memset(Proc, 0, sizeof(Procedural));
ppBitmap = geWorld_GetBitmapByName(World, TextureName);
/**** read Params *****/
// changed RF064 by QD
if(!strcmp(InputParams, "Params_Oil"))
{
strcpy(ParamWork, Params_Oil);
}
else if(!strcmp(InputParams, "Params_Jet"))
{
strcpy(ParamWork,Params_Jet);
}
else if(!strcmp(InputParams, "Params_Steam"))
{
strcpy(ParamWork,Params_Steam);
}
else if(!strcmp(InputParams, "Params_Explosion") || strlen(InputParams) < 20 )
{
strcpy(ParamWork,DefaultParams);
}
// end change RF064 by QD
else
{
strcpy(ParamWork,InputParams);
}
pstr = strtok(ParamWork,strbreakers);
Proc->NumParticles = getint(pstr);
Proc->NumSources = getint(pstr);
/**** make Bitmap *****/
if(!Particles_InitBitmap(ppBitmap))
goto fail;
Proc->Bitmap = ppBitmap;
Proc->SizeX = geBitmap_Width(Proc->Bitmap);
Proc->SizeY = geBitmap_Height(Proc->Bitmap);
geBitmap_GetInfo(Proc->Bitmap, &(Proc->BmInfo), (geBitmap_Info*)NULL);
Proc->SizeZ = min(Proc->SizeX, Proc->SizeY);
/**** make Particles *****/
Proc->Particles = (Particle*)geRam_AllocateClear(Proc->NumParticles * sizeof(Particle));
if(!(Proc->Particles))
goto fail;
for(i=0; i<Proc->NumParticles; i++)
{
Proc->Particles[i].shade = -1;
}
Proc->NumActiveParticles = 0;
/**** make Sources *****/
Proc->Sources = (ParticleSource*)geRam_AllocateClear(Proc->NumSources * sizeof(ParticleSource));
if(!(Proc->Sources))
goto fail;
/**** More Params *****/
// <> for stock schemes, take a few colors as parameters
if(matchstr(pstr, "oil"))
{
nextparam(pstr);
Proc->NumColors = Proc->NumShades = 16;
Proc->PixelRGBA = PixelRGBA_OilColor;
}
else if(matchstr(pstr, "fire"))
{
nextparam(pstr);
Proc->NumColors = 1;
Proc->NumShades = 256;
Proc->PixelRGBA = PixelRGBA_FireColor;
}
else if(matchstr(pstr, "opaquefire"))
{
nextparam(pstr);
Proc->NumColors = 1;
Proc->NumShades = 256;
Proc->PixelRGBA = PixelRGBA_OpaqueFireColor;
}
else if(matchstr(pstr, "steam"))
{
nextparam(pstr);
Proc->NumColors = 1;
Proc->NumShades = 256;
Proc->PixelRGBA = PixelRGBA_SteamColor;
}
else
{
Proc->NumColors = getint(pstr);
Proc->NumShades = getint(pstr);
Proc->PixelRGBA = PixelRGBA_OilColor;
// <>
// way to read in general spline of colors ?
}
if((Proc->NumColors * Proc->NumShades) < 256)
{
Proc->NumColors = min(Proc->NumColors, 256);
Proc->NumShades = 256 / Proc->NumColors;
}
Proc->NumSmoothes = getint(pstr);
Proc->SmoothRadius = getint(pstr);
if(matchstr(pstr, "bounce"))
{
Proc->Capper = Capper_Bounce;
Proc->SmoothWrap = GE_FALSE;
}
else if(matchstr(pstr,"wrap"))
{
Proc->Capper = Capper_Wrap;
Proc->SmoothWrap = GE_TRUE;
}
else if(matchstr(pstr,"hard"))
{
Proc->Capper = Capper_Hard;
Proc->SmoothWrap = GE_FALSE;
}
else
{
goto fail;
}
nextparam(pstr);
Proc->DoMagnetic = getbool(pstr);
if(Proc->DoMagnetic)
{
getvec(pstr, &(Proc->MagneticField));
}
Proc->DoAttractor = getbool(pstr);
if(Proc->DoAttractor)
{
Proc->AttractorStrength = getfloat(pstr); // negative for repulsive
Proc->AttractorIsAxis = getbool(pstr);
if(Proc->AttractorIsAxis)
{
getvec(pstr, &(Proc->AttractorAxis));
geVec3d_Normalize(&(Proc->AttractorAxis));
}
getvec(pstr, &(Proc->AttractorPos));
scalevec(&(Proc->AttractorPos));
}
/**** LUT's *****/
if(!Particles_InitPalette(Proc))
goto fail;
for(i=0; i<Proc->NumSources; i++)
{
ParticleSource *pSource;
Particle *pParticle;
pSource = Proc->Sources + i;
// base
pParticle = &(pSource->Base);
getvec(pstr, pParticle->p);
getvec(pstr, pParticle->v);
scalevec(pParticle->p);
scalevec(pParticle->v);
pParticle->DeathTime = getfloat(pstr);
pParticle->color = getint(pstr);
pParticle->shade = Proc->NumShades - 1;
pParticle->CurDeathTime = 0.0f;
// random
pParticle = &(pSource->Random);
getvec(pstr,pParticle->p);
getvec(pstr,pParticle->v);
scalevec(pParticle->p);
scalevec(pParticle->v);
absvec(pParticle->p);
absvec(pParticle->v);
pParticle->DeathTime = getfloat(pstr);
pParticle->color = getint(pstr);
pParticle->shade = getint(pstr);
pParticle->CurDeathTime = 0.0f;
pSource->RandomVMagnitude = geVec3d_Normalize((geVec3d*)(pParticle->v));
pSource->Delay = getfloat(pstr); // seconds
pSource->Base.Drag = getfloat(pstr);
pSource->CurTime = pSource->Delay;
}
return Proc;
fail:
Particles_Destroy(Proc);
return (Procedural*)NULL;
}
