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Fix #27392: boolean intersect's

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It was lag of optimization logic, which always retuns object's derivedMesh
if one of of boolean operation's meshes has got no faces.

Actually, result depends on operation and which mesh has got no faces.

Added small utility function to handle this.
This commit is contained in:
Sergey Sharybin 2011-05-29 15:53:38 +00:00
parent 11014aa34b
commit e1466b8ca2
1 changed files with 43 additions and 6 deletions
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49
source/blender/modifiers/intern/MOD_boolean.c
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@ -92,19 +92,56 @@ static void updateDepgraph(ModifierData *md, DagForest *forest,
}
#ifdef WITH_MOD_BOOLEAN
static DerivedMesh *get_quick_derivedMesh(DerivedMesh *derivedData, DerivedMesh *dm, int operation)
{
DerivedMesh *result = NULL;
if(derivedData->getNumFaces(derivedData) == 0 || dm->getNumFaces(dm) == 0) {
switch(operation) {
case eBooleanModifierOp_Intersect:
result = CDDM_new(0, 0, 0);
break;
case eBooleanModifierOp_Union:
if(derivedData->getNumFaces(derivedData)) result = derivedData;
else result = CDDM_copy(dm);
break;
case eBooleanModifierOp_Difference:
result = derivedData;
break;
}
}
return result;
}
static DerivedMesh *applyModifier(ModifierData *md, Object *ob,
DerivedMesh *derivedData,
int UNUSED(useRenderParams),
int UNUSED(isFinalCalc))
{
BooleanModifierData *bmd = (BooleanModifierData*) md;
DerivedMesh *dm = bmd->object->derivedFinal;
DerivedMesh *dm;
/* we do a quick sanity check */
if(dm && (derivedData->getNumFaces(derivedData) > 3)
&& bmd->object && dm->getNumFaces(dm) > 3) {
DerivedMesh *result = NewBooleanDerivedMesh(dm, bmd->object, derivedData, ob,
1 + bmd->operation);
if(!bmd->object)
return derivedData;
dm = bmd->object->derivedFinal;
if(dm) {
DerivedMesh *result;
/* when one of objects is empty (has got no faces) we could speed up
calculation a bit returning one of objects' derived meshes (or empty one)
Returning mesh is depended on modifieier's operation (sergey) */
result = get_quick_derivedMesh(derivedData, dm, bmd->operation);
if(result == NULL) {
result = NewBooleanDerivedMesh(dm, bmd->object, derivedData, ob,
1 + bmd->operation);
}
/* if new mesh returned, return it; otherwise there was
* an error, so delete the modifier object */