// ParticleCloud_Get():
void * ParticleCloud_Get( void *_inst, unsigned long vid ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
static double fvalue = 0;
static int ivalue = 0;
if( inst != NULL ) {
switch( vid ) {
case PC_START_FRAME:
fvalue = inst->GetStartTime();
return &fvalue;
break;
case PC_BIRTH_RATE:
ivalue = inst->GetBirthRate();
return &ivalue;
break;
case PC_FROZEN:
ivalue = inst->GetUseFrozen() ? 1 : 0;
return &ivalue;
break;
case PC_INDICES:
ivalue = inst->GetShowIndices() ? 1 : 0;
return &ivalue;
break;
}
}
return NULL;
}
// ParticleCloud_ChangeID():
void ParticleCloud_ChangeID( LWInstance _inst, const LWItemID *ids ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
int i, j;
for( j=0; j != (int)LWITEM_NULL; j++ ) {
for( i=0; i != (int)LWITEM_NULL; i+=2 ) {
if( ids[i] == inst->GetItems()[i] ) {
inst->GetItems()[i] = ids[i];
break;
}
}
}
}
// ParticleCloud_Set():
en_LWXPRefreshCodes ParticleCloud_Set( void *_inst, unsigned long vid, void *value ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
LWInstUpdate *instupdate = (LWInstUpdate *)inst->global( LWINSTUPDATE_GLOBAL, GFUSE_TRANSIENT );
en_LWXPRefreshCodes retval;
if( inst != NULL ) {
switch ( vid ) {
case PC_START_FRAME:
inst->SetStartTime( *(double *)value );
retval = LWXPRC_DFLT;
break;
case PC_BIRTH_RATE:
inst->SetBirthRate( *(int *)value );
retval = LWXPRC_DFLT;
break;
case PC_FROZEN:
inst->SetUseFrozen( (*(int *)value) != 0 );
retval = LWXPRC_DFLT;
break;
case PC_INDICES:
inst->SetShowIndices( (*(int *)value) != 0 );
retval = LWXPRC_DFLT;
break;
default:
retval = LWXPRC_NONE;
break;
}
}
instupdate( LWCUSTOMOBJ_HCLASS, _inst );
return retval;
}
// ParticleCloud_NewTime():
LWError ParticleCloud_NewTime( LWInstance _inst, LWFrame frame, LWTime time ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
inst->SetNow( frame, time );
return NULL;
}
// ParticleCloud_UseItems():
const LWItemID * ParticleCloud_UseItems( LWInstance _inst ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
return inst->GetItems();
}
// ParticleCloud_Evaluate():
void ParticleCloud_Evaluate( LWInstance _inst, const LWCustomObjAccess *access ) {
ParticleCloud_Instance *inst = (ParticleCloud_Instance *)_inst;
LWObjectInfo *object_info = (LWObjectInfo *)inst->global( LWOBJECTINFO_GLOBAL, GFUSE_TRANSIENT );
LWItemInfo *item_info = (LWItemInfo *)inst->global( LWITEMINFO_GLOBAL, GFUSE_TRANSIENT );
LWMeshInfoID mesh = object_info->meshInfo( inst->GetItems()[0], (inst->GetUseFrozen() ? 1 : 0) );
ParticleCloud_Point::mesh = mesh;
// Get the point positions
DynArray< ParticleCloud_Point * > points;
mesh->scanPoints( mesh, PointScan_GetPositions, &points );
// Get the item's transformation matrix
LWDVector item_position, item_right, item_up, item_forward;
LWFMatrix4 M;
item_info->param( inst->GetItems()[0], LWIP_POSITION, inst->GetTime(), item_position );
item_info->param( inst->GetItems()[0], LWIP_RIGHT, inst->GetTime(), item_right );
item_info->param( inst->GetItems()[0], LWIP_UP, inst->GetTime(), item_up );
item_info->param( inst->GetItems()[0], LWIP_FORWARD, inst->GetTime(), item_forward );
unsigned long i;
for ( i = 0; i < 3; i++ ) {
M[ 0 ][ i ] = ( float ) item_right[ i ];
M[ 1 ][ i ] = ( float ) item_up[ i ];
M[ 2 ][ i ] = ( float ) item_forward[ i ];
M[ 3 ][ i ] = ( float ) item_position[ i ];
M[ i ][ 3 ] = 0.0f;
}
M[ 3 ][ 3 ] = 1.0f;
// Display each point
LWFVector local, world;
double position[3];
char buffer[10];
float color[4] = { 0.75, 1.0, 0.75, 1.0 };
access->setColor( access->dispData, color );
for( i=0; i < points.NumElements(); i++ ) {
// Convert from local to world space
local[0] = points[i]->position[0];
local[1] = points[i]->position[1];
local[2] = points[i]->position[2];
LWVecMath::transformp( local, M, world );
// Convert to doubles
position[0] = world[0];
position[1] = world[1];
position[2] = world[2];
// Draw the point
access->point( access->dispData, position, LWCSYS_WORLD );
// Draw the point index
if( inst->GetShowIndices() ) {
sprintf( buffer, "%d", i );
access->text( access->dispData, position, buffer, 0, LWCSYS_WORLD );
}
}
}
