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* picomodel::obj: support polygons > quads

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This commit is contained in:
Garux 2019-01-10 16:29:38 +03:00
parent 034f06f18d
commit d19b3c9a28
1 changed files with 19 additions and 31 deletions
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50
libs/picomodel/pm_obj.c
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@ -693,15 +693,14 @@ static picoModel_t *_obj_load( PM_PARAMS_LOAD ){
/* coders. tho the wavefront obj standard defines exactly two */
/* ways of storing face information. so, i really won't support */
/* such stupid extravaganza here! */
const int numPointsMax = 128;
picoVec3_t verts [ numPointsMax ];
picoVec3_t normals[ numPointsMax ];
picoVec2_t coords [ numPointsMax ];
picoVec3_t verts [ 4 ];
picoVec3_t normals[ 4 ];
picoVec2_t coords [ 4 ];
int iv [ 4 ], has_v;
int ivt[ 4 ], has_vt = 0;
int ivn[ 4 ], has_vn = 0;
int have_quad = 0;
int iv [ numPointsMax ], has_v;
int ivt[ numPointsMax ], has_vt = 0;
int ivn[ numPointsMax ], has_vn = 0;
int slashcount = 0;
int doubleslash = 0;
int i;
@ -724,7 +723,7 @@ static picoModel_t *_obj_load( PM_PARAMS_LOAD ){
/* vertices (cause we only support triangles) into 'i*[]' */
/* store the actual vertex/uv/normal data in three arrays */
/* called 'verts','coords' and 'normals'. */
for ( i = 0; i < 4; i++ )
for ( i = 0; i < numPointsMax; i++ )
{
char *str;
@ -732,19 +731,14 @@ static picoModel_t *_obj_load( PM_PARAMS_LOAD ){
/* formats are handled below) */
str = _pico_parse( p,0 );
if ( str == NULL ) {
/* just break for quads */
if ( i == 3 ) {
/* got nuff points */
if ( i >= 3 ) {
break;
}
/* error otherwise */
_obj_error_return( "Face parse error" );
}
/* if this is the fourth index string we're */
/* parsing we assume that we have a quad */
if ( i == 3 ) {
have_quad = 1;
}
/* get slash count once */
if ( i == 0 ) {
@ -849,33 +843,27 @@ static picoModel_t *_obj_load( PM_PARAMS_LOAD ){
/* read the actual data we need to assign all the crap */
/* to our current pico surface */
if ( has_v ) {
const int max = have_quad? 4 : 3;
const int numPoints = i;
/* assign all surface information */
for ( i = 0; i < max; i++ )
for ( i = 0; i < numPoints; i++ )
{
/*if( has_v )*/ PicoSetSurfaceXYZ( curSurface, ( curVertex + i ), verts [ i ] );
/*if( has_vt )*/ PicoSetSurfaceST( curSurface,0,( curVertex + i ), coords [ i ] );
/*if( has_vt )*/ PicoSetSurfaceST( curSurface, 0, ( curVertex + i ), coords [ i ] );
/*if( has_vn )*/ PicoSetSurfaceNormal( curSurface, ( curVertex + i ), normals[ i ] );
if( curSurface && curSurface->shader )
PicoSetSurfaceColor( curSurface, 0, ( curVertex + i ), curSurface->shader->diffuseColor );
}
/* add our triangle (A B C) */
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 2 ),(picoIndex_t)( curVertex + 0 ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 1 ),(picoIndex_t)( curVertex + 1 ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 0 ),(picoIndex_t)( curVertex + 2 ) );
curFace++;
/* if we don't have a simple triangle, but a quad... */
if ( have_quad ) {
/* we have to add another triangle (2nd half of quad which is A C D) */
/* add triangles */
for ( i = 1; i < numPoints - 1; ++i )
{
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 2 ),(picoIndex_t)( curVertex + 0 ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 1 ),(picoIndex_t)( curVertex + 2 ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 0 ),(picoIndex_t)( curVertex + 3 ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 1 ),(picoIndex_t)( curVertex + i ) );
PicoSetSurfaceIndex( curSurface,( curFace * 3 + 0 ),(picoIndex_t)( curVertex + i + 1 ) );
curFace++;
}
/* increase vertex count */
curVertex += max;
curVertex += numPoints;
}
}
else if ( !_pico_stricmp( p->token,"usemtl" ) ) {