/*
=================
idRenderModelDecal::AddWinding
=================
*/
void idRenderModelDecal::AddWinding( const idWinding &w, const idMaterial *decalMaterial, const idPlane fadePlanes[2], float fadeDepth, int startTime ) {
int i;
float invFadeDepth, fade;
decalInfo_t decalInfo;
if ( ( material == NULL || material == decalMaterial ) &&
tri.numVerts + w.GetNumPoints() < MAX_DECAL_VERTS &&
tri.numIndexes + ( w.GetNumPoints() - 2 ) * 3 < MAX_DECAL_INDEXES ) {
material = decalMaterial;
// add to this decal
decalInfo = material->GetDecalInfo();
invFadeDepth = -1.0f / fadeDepth;
for ( i = 0; i < w.GetNumPoints(); i++ ) {
fade = fadePlanes[0].Distance( w[i].ToVec3() ) * invFadeDepth;
if ( fade < 0.0f ) {
fade = fadePlanes[1].Distance( w[i].ToVec3() ) * invFadeDepth;
}
if ( fade < 0.0f ) {
fade = 0.0f;
} else if ( fade > 0.99f ) {
fade = 1.0f;
}
fade = 1.0f - fade;
vertDepthFade[tri.numVerts + i] = fade;
tri.verts[tri.numVerts + i].xyz = w[i].ToVec3();
tri.verts[tri.numVerts + i].st[0] = w[i].s;
tri.verts[tri.numVerts + i].st[1] = w[i].t;
for ( int k = 0 ; k < 4 ; k++ ) {
int icolor = idMath::FtoiFast( decalInfo.start[k] * fade * 255.0f );
if ( icolor < 0 ) {
icolor = 0;
} else if ( icolor > 255 ) {
icolor = 255;
}
tri.verts[tri.numVerts + i].color[k] = icolor;
}
}
for ( i = 2; i < w.GetNumPoints(); i++ ) {
tri.indexes[tri.numIndexes + 0] = tri.numVerts;
tri.indexes[tri.numIndexes + 1] = tri.numVerts + i - 1;
tri.indexes[tri.numIndexes + 2] = tri.numVerts + i;
indexStartTime[tri.numIndexes] =
indexStartTime[tri.numIndexes + 1] =
indexStartTime[tri.numIndexes + 2] = startTime;
tri.numIndexes += 3;
}
tri.numVerts += w.GetNumPoints();
return;
}
// if we are at the end of the list, create a new decal
if ( !nextDecal ) {
nextDecal = idRenderModelDecal::Alloc();
}
// let the next decal on the chain take a look
nextDecal->AddWinding( w, decalMaterial, fadePlanes, fadeDepth, startTime );
}
/*
============
idBrush::FromWinding
============
*/
bool idBrush::FromWinding( const idWinding& w, const idPlane& windingPlane )
{
int i, j, bestAxis;
idPlane plane;
idVec3 normal, axialNormal;
sides.Append( new idBrushSide( windingPlane, -1 ) );
sides.Append( new idBrushSide( -windingPlane, -1 ) );
bestAxis = 0;
for( i = 1; i < 3; i++ )
{
if( idMath::Fabs( windingPlane.Normal()[i] ) > idMath::Fabs( windingPlane.Normal()[bestAxis] ) )
{
bestAxis = i;
}
}
axialNormal = vec3_origin;
if( windingPlane.Normal()[bestAxis] > 0.0f )
{
axialNormal[bestAxis] = 1.0f;
}
else
{
axialNormal[bestAxis] = -1.0f;
}
for( i = 0; i < w.GetNumPoints(); i++ )
{
j = ( i + 1 ) % w.GetNumPoints();
normal = ( w[j].ToVec3() - w[i].ToVec3() ).Cross( axialNormal );
if( normal.Normalize() < 0.5f )
{
continue;
}
plane.SetNormal( normal );
plane.FitThroughPoint( w[j].ToVec3() );
sides.Append( new idBrushSide( plane, -1 ) );
}
if( sides.Num() < 4 )
{
for( i = 0; i < sides.Num(); i++ )
{
delete sides[i];
}
sides.Clear();
return false;
}
sides[0]->winding = w.Copy();
windingsValid = true;
BoundBrush();
return true;
}
/*
============
idTraceModel::SetupPolygon
============
*/
void idTraceModel::SetupPolygon( const idWinding &w ) {
int i;
idVec3 *verts;
verts = (idVec3 *) _alloca16( w.GetNumPoints() * sizeof( idVec3 ) );
for ( i = 0; i < w.GetNumPoints(); i++ ) {
verts[i] = w[i].ToVec3();
}
SetupPolygon( verts, w.GetNumPoints() );
}
void idSaveGame::WriteWinding( const idWinding &w ) {
int i, num;
num = w.GetNumPoints();
WriteInt( num );
for( i = 0; i < num; i++ ) {
WriteVec5( w[i] );
}
}
/*
================
idRestoreGame::ReadWinding
================
*/
void idRestoreGame::ReadWinding( idWinding &w ) {
int i, num;
file->ReadInt( num );
w.SetNumPoints( num );
for( i = 0; i < num; i++ ) {
file->Read( &w[i], sizeof( idVec5 ) );
LittleRevBytes( &w[i], sizeof( float ), sizeof( idVec5 ) / sizeof( float ) );
}
}
/*
================
idSaveGame::WriteBounds
================
*/
void idSaveGame::WriteWinding( const idWinding &w ) {
int i, num;
num = w.GetNumPoints();
file->WriteInt( num );
for( i = 0; i < num; i++ ) {
idVec5 v = w[i];
LittleRevBytes( &v, sizeof( float ), sizeof( v ) / sizeof( float ) );
file->Write( &v, sizeof( v ) );
}
}
/*
================
idSaveGame::WriteBounds
================
*/
void idSaveGame::WriteWinding( const idWinding& w )
{
int i, num;
num = w.GetNumPoints();
file->WriteBig( num );
for( i = 0; i < num; i++ )
{
idVec5 v = w[i];
file->WriteBig( v );
}
}
/*
================
idRestoreGame::ReadWinding
================
*/
void idRestoreGame::ReadWinding( idWinding& w )
{
int i, num;
ReadInt( num );
w.SetNumPoints( num );
for( i = 0; i < num; i++ )
{
idVec5& v = w[i];
file->ReadBig( v );
}
}
void idRestoreGame::ReadWinding( idWinding &w ) {
int i, num;
ReadInt( num );
if( num < 0 ) {
Error( "idRestoreGame::ReadWinding: negative number of points (%d)", num );
}
w.SetNumPoints( num );
for( i = 0; i < num; i++ ) {
ReadVec5( w[i] );
}
}
/*
=================
idRenderModelDecal::CreateDecalFromWinding
=================
*/
void idRenderModelDecal::CreateDecalFromWinding( const idWinding &w, const idMaterial *decalMaterial, const idPlane fadePlanes[2], float fadeDepth, int startTime ) {
// Often we are appending a new triangle to an existing decal, so merge with the previous decal if possible
int decalIndex = ( nextDecal - 1 ) & ( MAX_DECALS - 1 );
if ( decalIndex >= 0
&& decals[decalIndex].material == decalMaterial
&& decals[decalIndex].startTime == startTime
&& decals[decalIndex].numVerts + w.GetNumPoints() <= MAX_DECAL_VERTS
&& decals[decalIndex].numIndexes + 3 * ( w.GetNumPoints() - 2 ) <= MAX_DECAL_INDEXES ) {
} else {
decalIndex = nextDecal++ & ( MAX_DECALS - 1 );
decals[decalIndex].material = decalMaterial;
decals[decalIndex].startTime = startTime;
decals[decalIndex].numVerts = 0;
decals[decalIndex].numIndexes = 0;
assert( w.GetNumPoints() <= MAX_DECAL_VERTS );
if ( nextDecal - firstDecal > MAX_DECALS ) {
firstDecal = nextDecal - MAX_DECALS;
}
}
decal_t & decal = decals[decalIndex];
const float invFadeDepth = -1.0f / fadeDepth;
int firstVert = decal.numVerts;
// create the vertices
for ( int i = 0; i < w.GetNumPoints(); i++ ) {
float depthFade = fadePlanes[0].Distance( w[i].ToVec3() ) * invFadeDepth;
if ( depthFade < 0.0f ) {
depthFade = fadePlanes[1].Distance( w[i].ToVec3() ) * invFadeDepth;
}
if ( depthFade < 0.0f ) {
depthFade = 0.0f;
} else if ( depthFade > 0.99f ) {
depthFade = 1.0f;
}
decal.vertDepthFade[decal.numVerts] = 1.0f - depthFade;
decal.verts[decal.numVerts].Clear();
decal.verts[decal.numVerts].xyz = w[i].ToVec3();
decal.verts[decal.numVerts].SetTexCoord( w[i].s, w[i].t );
decal.numVerts++;
}
// create the indexes
for ( int i = 2; i < w.GetNumPoints(); i++ ) {
assert( decal.numIndexes + 3 <= MAX_DECAL_INDEXES );
decal.indexes[decal.numIndexes + 0] = firstVert;
decal.indexes[decal.numIndexes + 1] = firstVert + i - 1;
decal.indexes[decal.numIndexes + 2] = firstVert + i;
decal.numIndexes += 3;
}
// add degenerate triangles until the index size is a multiple of 16 bytes
for ( ; ( ( ( decal.numIndexes * sizeof( triIndex_t ) ) & 15 ) != 0 ); decal.numIndexes += 3 ) {
assert( decal.numIndexes + 3 <= MAX_DECAL_INDEXES );
decal.indexes[decal.numIndexes + 0] = 0;
decal.indexes[decal.numIndexes + 1] = 0;
decal.indexes[decal.numIndexes + 2] = 0;
}
}
