142 lines
5.2 KiB
Plaintext
142 lines
5.2 KiB
Plaintext
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#ifndef OSGUTIL_STATISTICS
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#define OSGUTIL_STATISTICS 1
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#include <osg/GeoSet>
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namespace osgUtil {
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/**
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* Statistics base class. Used to extract primitive information from
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* the renderBin(s).
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*/
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class OSGUTIL_EXPORT Statistics : public osg::Object
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{
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public:
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Statistics() {
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numOpaque=0, nummat=0;
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nprims=0, nlights=0; nbins=0;
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reset();
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};
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~Statistics() {}; // no dynamic allocations, so no need to free
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void reset() {
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for (int i=0; i<20; i++) primverts[i]=numprimtypes[i]=primlens[i]=primtypes[i]=0;
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}
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virtual osg::Object* clone() const { return new Statistics(); }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const Statistics*>(obj)!=0L; }
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virtual const char* className() const { return "Statistics"; }
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void addstat(osg::GeoSet *gs) { // analyse the drawable GeoSet
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const int np=gs->getNumPrims(); // number of primitives in this geoset
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nprims += np;
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const int type=gs->getPrimType();
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switch (type) {
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case osg::GeoSet::POINTS:
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case osg::GeoSet::LINES:
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case osg::GeoSet::LINE_STRIP:
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case osg::GeoSet::FLAT_LINE_STRIP:
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case osg::GeoSet::LINE_LOOP:
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case osg::GeoSet::TRIANGLE_STRIP:
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case osg::GeoSet::FLAT_TRIANGLE_STRIP:
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case osg::GeoSet::TRIANGLE_FAN:
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case osg::GeoSet::FLAT_TRIANGLE_FAN:
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case osg::GeoSet::QUAD_STRIP:
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case osg::GeoSet::POLYGON:
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primtypes[type]++;
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primtypes[0]++;
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break;
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case osg::GeoSet::TRIANGLES: // should not have any lengths for tris & quads
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primtypes[type]++;
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primtypes[0]++;
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primlens[0]+=np;
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primlens[type]+=np;
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numprimtypes[type]+=np;
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primverts[type]+=3*np;
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primverts[0]+=3*np;
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break;
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case osg::GeoSet::QUADS:
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primtypes[type]++;
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primtypes[0]++;
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primlens[0]+=np*2;
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primlens[type]+=np*2; // quad is equiv to 2 triangles
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numprimtypes[type]+=np;
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primverts[type]+=4*np;
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primverts[0]+=4*np;
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break;
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case osg::GeoSet::NO_TYPE:
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default:
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break;
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}
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// now count the lengths, ie efficiency of triangulation
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const int *lens=gs->getPrimLengths(); // primitive lengths
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for (int i=0; i<np && lens; i++) {
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switch (type) {
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case osg::GeoSet::POINTS:
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case osg::GeoSet::LINES:
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case osg::GeoSet::LINE_STRIP:
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case osg::GeoSet::FLAT_LINE_STRIP:
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case osg::GeoSet::LINE_LOOP:
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case osg::GeoSet::TRIANGLES: // should not have any lengths for tris & quads
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case osg::GeoSet::QUADS:
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case osg::GeoSet::QUAD_STRIP:
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case osg::GeoSet::POLYGON:
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primlens[0]+=lens[i];
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primlens[type]+=lens[i];
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break;
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case osg::GeoSet::TRIANGLE_STRIP:
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case osg::GeoSet::FLAT_TRIANGLE_STRIP:
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case osg::GeoSet::TRIANGLE_FAN:
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case osg::GeoSet::FLAT_TRIANGLE_FAN:
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primlens[0]+=lens[i]-2;
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primlens[type]+=lens[i]-2; // tri strips & fans create lens[i]-2 triangles
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break;
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case osg::GeoSet::NO_TYPE:
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default:
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break;
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}
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switch (type) {
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case osg::GeoSet::POINTS:
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case osg::GeoSet::LINES:
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case osg::GeoSet::LINE_STRIP:
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case osg::GeoSet::FLAT_LINE_STRIP:
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case osg::GeoSet::LINE_LOOP:
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case osg::GeoSet::TRIANGLES:
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case osg::GeoSet::QUADS:
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case osg::GeoSet::TRIANGLE_STRIP:
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case osg::GeoSet::FLAT_TRIANGLE_STRIP:
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case osg::GeoSet::TRIANGLE_FAN:
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case osg::GeoSet::FLAT_TRIANGLE_FAN:
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case osg::GeoSet::QUAD_STRIP:
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case osg::GeoSet::POLYGON:
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numprimtypes[0]++;
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numprimtypes[type]++;
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primverts[type]+=lens[i];
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primverts[0]+=lens[i];
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break;
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case osg::GeoSet::NO_TYPE:
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default:
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break;
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}
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}
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}
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public:
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int numOpaque, nummat, nbins;
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int nprims, nlights;
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int numprimtypes[20]; // histogram of number of each type of prim
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int primtypes[20]; // histogram of number of each type of prim
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int primlens[20]; // histogram of lengths of each type of prim
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int primverts[20]; // histogram of number of vertices to be transformed
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protected:
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};
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};
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#endif
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