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fix SmoothMetaTriangles()

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mainly fixes celshading, as it's about coincident vertices with varying normal smoothing params
This commit is contained in:
Garux 2022-11-01 13:00:10 +03:00
parent 02f1fccb14
commit a5d0ae72d1
1 changed files with 63 additions and 46 deletions
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109
tools/quake3/q3map2/surface_meta.cpp
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@ -1167,99 +1167,116 @@ void SmoothMetaTriangles(){
const float defaultShadeAngle = degrees_to_radians( npDegrees );
for( auto& [ d, list ] : metaVerts ){
if( list.size() > 1 ){
if( list.size() > 1 || ( list.size() == 1 && list.front().m_triangles.size() > 1 ) ){
float maxShadeAngle = 0.f;
std::vector<metaVertex_t*> verts;
verts.reserve( list.size() );
struct VT{ metaVertex_t *vertex; metaTriangle_t *triangle; float angle{}; bool skipped{}; bool smoothed{}; Vector3 newnormal{ 0 }; };
std::vector<VT> verts;
for( auto& v : list )
verts.push_back( &v );
/* allocate shade angle table */
std::vector<float> shadeAngles( list.size(), 179 );
/* allocate smoothed table */
std::vector<std::uint8_t> smoothed( list.size(), false );
for( auto* t : v.m_triangles )
verts.push_back( VT{ &v, t } );
/* get per-vertex smoothing angle */
for( size_t i = 0; i < verts.size(); ++i )
for( auto& v : verts )
{
for( metaTriangle_t *tri : verts[i]->m_triangles )
{
float shadeAngle = defaultShadeAngle;
/* get shade angle from shader */
if ( tri->si->shadeAngleDegrees > 0.0f ) {
shadeAngle = degrees_to_radians( tri->si->shadeAngleDegrees );
}
/* get shade angle from entity */
else if ( tri->shadeAngleDegrees > 0.0f ) {
shadeAngle = degrees_to_radians( tri->shadeAngleDegrees );
}
/* flag verts */
value_minimize( shadeAngles[i], shadeAngle );
smoothed[i] = shadeAngles[i] <= 0;
float shadeAngle = defaultShadeAngle;
/* get shade angle from shader */
if ( v.triangle->si->shadeAngleDegrees > 0.0f ) {
shadeAngle = degrees_to_radians( v.triangle->si->shadeAngleDegrees );
}
/* get shade angle from entity */
else if ( v.triangle->shadeAngleDegrees > 0.0f ) {
shadeAngle = degrees_to_radians( v.triangle->shadeAngleDegrees );
}
value_maximize( maxShadeAngle, shadeAngles[i] );
/* flag verts */
v.angle = shadeAngle;
v.skipped = shadeAngle <= 0;
value_maximize( maxShadeAngle, shadeAngle );
}
if( maxShadeAngle > 0 ){
/* go through the list of vertexes */
for ( size_t i = 0; i < verts.size(); ++i )
for ( auto v = verts.begin(); v != verts.end(); ++v )
{
/* already smoothed? */
if ( smoothed[ i ] ) {
if ( v->skipped || v->smoothed ) {
continue;
}
/* clear */
Vector3 average( 0 );
std::vector<metaVertex_t*> smoothedVerts;
std::vector<VT*> smoothedVerts;
std::vector<Vector3> votes;
/* test the rest, including self */
for ( size_t j = i; j < verts.size(); ++j )
for ( auto v2 = v; v2 != verts.end(); ++v2 )
{
/* already smoothed? */
if ( smoothed[ j ] ) {
if ( v2->skipped || v2->smoothed ) {
continue;
}
/* use smallest shade angle */
const float shadeAngle = std::min( shadeAngles[ i ], shadeAngles[ j ] );
const float shadeAngle = std::min( v->angle, v2->angle );
/* check shade angle */
const double dot = std::clamp( vector3_dot( verts[ i ]->normal, verts[ j ]->normal ), -1.0, 1.0 );
const double dot = std::clamp( vector3_dot( v->vertex->normal, v2->vertex->normal ), -1.0, 1.0 );
if ( acos( dot ) + THETA_EPSILON >= shadeAngle ) {
continue;
}
/* add to the list */
smoothedVerts.push_back( verts[j] );
/* flag vertex */
smoothed[ j ] = true;
smoothedVerts.push_back( v2.operator->() );
/* see if this normal has already been voted */
if( std::none_of( votes.begin(), votes.end(),
[normal = verts[j]->normal]( const Vector3& vote ){
[normal = v2->vertex->normal]( const Vector3& vote ){
return vector3_equal_epsilon( normal, vote, EQUAL_NORMAL_EPSILON );
} ) )
{ /* add a new vote */
average += verts[ j ]->normal;
votes.push_back( verts[ j ]->normal );
average += v2->vertex->normal;
votes.push_back( v2->vertex->normal );
}
}
/* flag vertices */
/* don't average for less than 2 verts */
if ( smoothedVerts.size() > 1 ) {
/* average normal */
if ( VectorNormalize( average ) != 0 ) {
/* smooth */
for ( auto v : smoothedVerts )
v->normal = average;
numSmoothed++;
if ( smoothedVerts.size() > 1 && VectorNormalize( average ) != 0 ) {
for ( auto *v : smoothedVerts ){
v->smoothed = true;
v->newnormal = average;
}
numSmoothed++;
}
else{
for ( auto *v : smoothedVerts ){
v->skipped = true;
}
}
}
/* reconstruct meta data from smoothed verts */
if( std::any_of( verts.cbegin(), verts.cend(), []( const VT& vt ){ return vt.smoothed; } ) ){
decltype( list ) newlist;
for( auto& v : verts ){
bspDrawVert_t newv = *v.vertex;
if( v.smoothed )
newv.normal = v.newnormal;
auto it = std::find_if( newlist.begin(), newlist.end(), [&newv]( const metaVertex_t& v ){
return bspDrawVert_equal( newv, v );
} );
if( it == newlist.end() ){ /* insert vertex */
newlist.push_back( newv );
it = --newlist.end();
it->m_metaVertexGroup = &list;
}
/* link vertex <> triangle */
it->m_triangles.push_back( v.triangle );
*std::find( v.triangle->m_vertices.begin(), v.triangle->m_vertices.end(), v.vertex ) = it.operator->();
}
list.swap( newlist );
}
}
}
}