//------------------------------------------------------------------------------
void ShadowVolumeBSP::clipPoly(SVNode * root, SVPoly ** store, SVPoly * poly)
{
if(!root)
{
recyclePoly(poly);
return;
}
const PlaneF & plane = getPlane(root->mPlaneIndex);
switch(whichSide(poly, plane))
{
case SVNode::On:
case SVNode::Back:
if(root->mBack)
clipPoly(root->mBack, store, poly);
else
addToPolyList(store, poly);
break;
case SVNode::Front:
// encountered POLY node?
if(!root->mFront)
{
recyclePoly(poly);
return;
}
else
clipPoly(root->mFront, store, poly);
break;
case SVNode::Split:
{
SVPoly * front;
SVPoly * back;
splitPoly(poly, plane, &front, &back);
AssertFatal(front && back, "ShadowVolumeBSP::clipPoly: invalid split");
recyclePoly(poly);
// front
if(!root->mFront)
{
recyclePoly(front);
return;
}
else
clipPoly(root->mFront, store, front);
// back
if(root->mBack)
clipPoly(root->mBack, store, back);
else
addToPolyList(store, back);
break;
}
}
}
F32 ShadowVolumeBSP::getLitSurfaceArea(SVPoly * poly, SurfaceInfo * surfaceInfo)
{
// clip the poly to the shadow volumes
SVPoly * polyStore = poly;
for(U32 i = 0; polyStore && (i < surfaceInfo->mShadowed.size()); i++)
{
SVPoly * polyList = 0;
SVPoly * traverse = polyStore;
while(traverse)
{
SVPoly * next = traverse->mNext;
traverse->mNext = 0;
SVPoly * currentStore = 0;
clipPoly(mShadowVolumes[surfaceInfo->mShadowed[i]], ¤tStore, traverse);
if(currentStore)
movePolyList(&polyList, currentStore);
traverse = next;
}
polyStore = polyList;
}
// get the lit area
F32 area = getPolySurfaceArea(polyStore);
recyclePoly(polyStore);
return(area);
}
//------------------------------------------------------------------------------
F32 ShadowVolumeBSP::getClippedSurfaceArea(SVNode * root, SVPoly * poly)
{
SVPoly * store = 0;
clipPoly(root, &store, poly);
F32 area = getPolySurfaceArea(store);
recyclePoly(store);
return(area);
}
bool FruitCutNinjaScene::slice(PhysicsWorld &world, const PhysicsRayCastInfo& info, void *data)
{
if (info.shape->getBody()->getTag() != _sliceTag)
{
return true;
}
if (!info.shape->containsPoint(info.start) && !info.shape->containsPoint(info.end))
{
Vec2 normal = info.end - info.start;
normal = normal.getPerp().getNormalized();
float dist = info.start.dot(normal);
clipPoly(dynamic_cast<PhysicsShapePolygon*>(info.shape), normal, dist);
clipPoly(dynamic_cast<PhysicsShapePolygon*>(info.shape), -normal, -dist);
Vec2 v2Direct = (info.end - info.start).getNormalized();
Vec2 v2Tmp = Vec2::ZERO;
for (int i = 0; i < PARTICLE_COUNT; i++)
{
v2Tmp = info.contact + v2Direct * 80 * (i - 1);
if (!info.shape->containsPoint(v2Tmp))
{
continue;
}
else
{
m_pEmitter[i]->setPosition(v2Tmp);
m_pEmitter[i]->resetSystem();
}
}
info.shape->getBody()->removeFromWorld();
info.shape->getBody()->getNode()->removeFromParent();
}
return true;
}
static void rasterizeTri(const float* v0, const float* v1, const float* v2,
const unsigned char area, rcHeightfield& hf,
const float* bmin, const float* bmax,
const float cs, const float ics, const float ich,
const int flagMergeThr)
{
const int w = hf.width;
const int h = hf.height;
float tmin[3], tmax[3];
const float by = bmax[1] - bmin[1];
// Calculate the bounding box of the triangle.
rcVcopy(tmin, v0);
rcVcopy(tmax, v0);
rcVmin(tmin, v1);
rcVmin(tmin, v2);
rcVmax(tmax, v1);
rcVmax(tmax, v2);
// If the triangle does not touch the bbox of the heightfield, skip the triagle.
if (!overlapBounds(bmin, bmax, tmin, tmax))
return;
// Calculate the footpring of the triangle on the grid.
int x0 = (int)((tmin[0] - bmin[0])*ics);
int y0 = (int)((tmin[2] - bmin[2])*ics);
int x1 = (int)((tmax[0] - bmin[0])*ics);
int y1 = (int)((tmax[2] - bmin[2])*ics);
x0 = rcClamp(x0, 0, w-1);
y0 = rcClamp(y0, 0, h-1);
x1 = rcClamp(x1, 0, w-1);
y1 = rcClamp(y1, 0, h-1);
// Clip the triangle into all grid cells it touches.
float in[7*3], out[7*3], inrow[7*3];
for (int y = y0; y <= y1; ++y)
{
// Clip polygon to row.
rcVcopy(&in[0], v0);
rcVcopy(&in[1*3], v1);
rcVcopy(&in[2*3], v2);
int nvrow = 3;
const float cz = bmin[2] + y*cs;
nvrow = clipPoly(in, nvrow, out, 0, 1, -cz);
if (nvrow < 3) continue;
nvrow = clipPoly(out, nvrow, inrow, 0, -1, cz+cs);
if (nvrow < 3) continue;
for (int x = x0; x <= x1; ++x)
{
// Clip polygon to column.
int nv = nvrow;
const float cx = bmin[0] + x*cs;
nv = clipPoly(inrow, nv, out, 1, 0, -cx);
if (nv < 3) continue;
nv = clipPoly(out, nv, in, -1, 0, cx+cs);
if (nv < 3) continue;
// Calculate min and max of the span.
float smin = in[1], smax = in[1];
for (int i = 1; i < nv; ++i)
{
smin = rcMin(smin, in[i*3+1]);
smax = rcMax(smax, in[i*3+1]);
}
smin -= bmin[1];
smax -= bmin[1];
// Skip the span if it is outside the heightfield bbox
if (smax < 0.0f) continue;
if (smin > by) continue;
// Clamp the span to the heightfield bbox.
if (smin < 0.0f) smin = 0;
if (smax > by) smax = by;
// Snap the span to the heightfield height grid.
unsigned short ismin = (unsigned short)rcClamp((int)floorf(smin * ich), 0, RC_SPAN_MAX_HEIGHT);
unsigned short ismax = (unsigned short)rcClamp((int)ceilf(smax * ich), (int)ismin+1, RC_SPAN_MAX_HEIGHT);
addSpan(hf, x, y, ismin, ismax, area, flagMergeThr);
}
}
}
bool CCutScene::slice(PhysicsWorld &world, const PhysicsRayCastInfo& info, void *data)
{
log("slice called %f, %f, %lld", info.contact.x, info.contact.y, m_lLastSlice);
if (!m_bHasFood) return true;
if (info.shape->getBody()->getTag() != _sliceTag)
{
return true;
}
long long llLastSlice = 0;
PhysicsBody* pBody = info.shape->getBody();
if (pBody == NULL) return true;
CFoodCut* pFood = (CFoodCut*)info.shape->getBody()->getNode();
if (pFood == NULL) return true;
llLastSlice = pFood->getBirthTime();
if (getCurTime() - llLastSlice <= 200) return true;
m_v2Delta.normalize();
Vec2 v2Start = info.contact - m_v2Delta * 100;
Vec2 v2End = info.contact + m_v2Delta * 500;
if (!info.shape->containsPoint(v2Start) && !info.shape->containsPoint(v2End))
{
Vec2 normal = v2End - v2Start;
normal = normal.getPerp().getNormalized();
float dist = v2Start.dot(normal);
clipPoly(dynamic_cast<PhysicsShapePolygon*>(info.shape), normal, dist);
clipPoly(dynamic_cast<PhysicsShapePolygon*>(info.shape), -normal, -dist);
Vec2 v2Direct = (v2End - v2Start).getNormalized();
Vec2 v2Tmp = Vec2::ZERO;
for (int i = 0; i < PARTICLE_COUNT; i++)
{
v2Tmp = info.contact + v2Direct * 80 * (i - 1);
if (!info.shape->containsPoint(v2Tmp))
{
continue;
}
else
{
m_pEmitter[i]->setPosition(v2Tmp);
m_pEmitter[i]->resetSystem();
}
}
std::vector<CFoodCut*>::iterator it;
for (it = m_vCutFoods.begin(); it != m_vCutFoods.end(); it++)
{
CFoodCut* pTmp = *it;
if (pTmp == info.shape->getBody()->getNode())
{
m_vCutFoods.erase(it);
break;
}
}
m_nSliceCount--;
info.shape->getBody()->removeFromWorld();
info.shape->getBody()->getNode()->removeFromParent();
checkFoodSliced();
}
return true;
}
