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added triangle culling, most noticeably fixes NASCAR Thunder 2004 [smf]

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smf- 2013-04-25 12:03:19 +00:00
parent d06d200627
commit b81074e17d
1 changed files with 81 additions and 108 deletions
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189
src/emu/video/psx.c
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@ -75,6 +75,8 @@ cxd8654q_device::cxd8654q_device(const machine_config &mconfig, const char *tag,
static const UINT16 m_p_n_nextpointlist4[] = { 1, 3, 0, 2 }; static const UINT16 m_p_n_nextpointlist4[] = { 1, 3, 0, 2 };
static const UINT16 m_p_n_prevpointlist4[] = { 2, 0, 3, 1 }; static const UINT16 m_p_n_prevpointlist4[] = { 2, 0, 3, 1 };
static const UINT16 m_p_n_nextpointlist4b[] = { 0, 3, 1, 2 };
static const UINT16 m_p_n_prevpointlist4b[] = { 0, 2, 3, 1 };
static const UINT16 m_p_n_nextpointlist3[] = { 1, 2, 0 }; static const UINT16 m_p_n_nextpointlist3[] = { 1, 2, 0 };
static const UINT16 m_p_n_prevpointlist3[] = { 2, 0, 1 }; static const UINT16 m_p_n_prevpointlist3[] = { 2, 0, 1 };
@ -1272,6 +1274,81 @@ void psxgpu_device::decode_tpage( UINT32 tpage )
} \ } \
} }
INLINE int CullVertex( int a, int b )
{
int d = a - b;
if( d < -1023 || d > 1023 )
{
return 1;
}
return 0;
}
#define CULLTRIANGLE( PacketType, start ) \
( \
CULLPOINT( PacketType, start, start + 1 ) || CULLPOINT( PacketType, start + 1, start + 2 ) || CULLPOINT( PacketType, start + 2, start ) \
)
#define CULLPOINT( PacketType, p1, p2 ) \
( \
CullVertex( COORD_Y( m_packet.PacketType.vertex[ p1 ].n_coord ), COORD_Y( m_packet.PacketType.vertex[ p2 ].n_coord ) ) || \
CullVertex( COORD_X( m_packet.PacketType.vertex[ p1 ].n_coord ), COORD_X( m_packet.PacketType.vertex[ p2 ].n_coord ) ) \
)
#define FINDTOPLEFT( PacketType ) \
for( n_point = 0; n_point < n_points; n_point++ ) \
{ \
ADJUST_COORD( m_packet.PacketType.vertex[ n_point ].n_coord ); \
} \
\
n_leftpoint = 0; \
if( n_points == 4 ) \
{ \
if( CULLTRIANGLE( PacketType, 0 ) ) \
{ \
if( CULLTRIANGLE( PacketType, 1 ) ) \
{ \
return; \
} \
\
p_n_rightpointlist = m_p_n_nextpointlist4b; \
p_n_leftpointlist = m_p_n_prevpointlist4b; \
n_leftpoint++; \
} \
else if( CULLTRIANGLE( PacketType, 1 ) ) \
{ \
p_n_rightpointlist = m_p_n_nextpointlist3; \
p_n_leftpointlist = m_p_n_prevpointlist3; \
n_points--; \
} \
else \
{ \
p_n_rightpointlist = m_p_n_nextpointlist4; \
p_n_leftpointlist = m_p_n_prevpointlist4; \
} \
} \
else if( CULLTRIANGLE( PacketType, 0 ) ) \
{ \
return; \
} \
else \
{ \
p_n_rightpointlist = m_p_n_nextpointlist3; \
p_n_leftpointlist = m_p_n_prevpointlist3; \
} \
\
for( n_point = n_leftpoint + 1; n_point < n_points; n_point++ ) \
{ \
if( COORD_Y( m_packet.PacketType.vertex[ n_point ].n_coord ) < COORD_Y( m_packet.PacketType.vertex[ n_leftpoint ].n_coord ) || \
( COORD_Y( m_packet.PacketType.vertex[ n_point ].n_coord ) == COORD_Y( m_packet.PacketType.vertex[ n_leftpoint ].n_coord ) && \
COORD_X( m_packet.PacketType.vertex[ n_point ].n_coord ) < COORD_X( m_packet.PacketType.vertex[ n_leftpoint ].n_coord ) ) ) \
{ \
n_leftpoint = n_point; \
} \
} \
n_rightpoint = n_leftpoint; \
void psxgpu_device::FlatPolygon( int n_points ) void psxgpu_device::FlatPolygon( int n_points )
{ {
INT16 n_y; INT16 n_y;
@ -1328,33 +1405,7 @@ void psxgpu_device::FlatPolygon( int n_points )
n_g.w.h = BGR_G( m_packet.FlatPolygon.n_bgr ); n_g.w.l = 0; n_g.w.h = BGR_G( m_packet.FlatPolygon.n_bgr ); n_g.w.l = 0;
n_b.w.h = BGR_B( m_packet.FlatPolygon.n_bgr ); n_b.w.l = 0; n_b.w.h = BGR_B( m_packet.FlatPolygon.n_bgr ); n_b.w.l = 0;
if( n_points == 4 ) FINDTOPLEFT( FlatPolygon )
{
p_n_rightpointlist = m_p_n_nextpointlist4;
p_n_leftpointlist = m_p_n_prevpointlist4;
}
else
{
p_n_rightpointlist = m_p_n_nextpointlist3;
p_n_leftpointlist = m_p_n_prevpointlist3;
}
for( n_point = 0; n_point < n_points; n_point++ )
{
ADJUST_COORD( m_packet.FlatPolygon.vertex[ n_point ].n_coord );
}
n_leftpoint = 0;
for( n_point = 1; n_point < n_points; n_point++ )
{
if( COORD_Y( m_packet.FlatPolygon.vertex[ n_point ].n_coord ) < COORD_Y( m_packet.FlatPolygon.vertex[ n_leftpoint ].n_coord ) ||
( COORD_Y( m_packet.FlatPolygon.vertex[ n_point ].n_coord ) == COORD_Y( m_packet.FlatPolygon.vertex[ n_leftpoint ].n_coord ) &&
COORD_X( m_packet.FlatPolygon.vertex[ n_point ].n_coord ) < COORD_X( m_packet.FlatPolygon.vertex[ n_leftpoint ].n_coord ) ) )
{
n_leftpoint = n_point;
}
}
n_rightpoint = n_leftpoint;
n_dx1 = 0; n_dx1 = 0;
n_dx2 = 0; n_dx2 = 0;
@ -1528,33 +1579,7 @@ void psxgpu_device::FlatTexturedPolygon( int n_points )
break; break;
} }
if( n_points == 4 ) FINDTOPLEFT( FlatTexturedPolygon )
{
p_n_rightpointlist = m_p_n_nextpointlist4;
p_n_leftpointlist = m_p_n_prevpointlist4;
}
else
{
p_n_rightpointlist = m_p_n_nextpointlist3;
p_n_leftpointlist = m_p_n_prevpointlist3;
}
for( n_point = 0; n_point < n_points; n_point++ )
{
ADJUST_COORD( m_packet.FlatTexturedPolygon.vertex[ n_point ].n_coord );
}
n_leftpoint = 0;
for( n_point = 1; n_point < n_points; n_point++ )
{
if( COORD_Y( m_packet.FlatTexturedPolygon.vertex[ n_point ].n_coord ) < COORD_Y( m_packet.FlatTexturedPolygon.vertex[ n_leftpoint ].n_coord ) ||
( COORD_Y( m_packet.FlatTexturedPolygon.vertex[ n_point ].n_coord ) == COORD_Y( m_packet.FlatTexturedPolygon.vertex[ n_leftpoint ].n_coord ) &&
COORD_X( m_packet.FlatTexturedPolygon.vertex[ n_point ].n_coord ) < COORD_X( m_packet.FlatTexturedPolygon.vertex[ n_leftpoint ].n_coord ) ) )
{
n_leftpoint = n_point;
}
}
n_rightpoint = n_leftpoint;
n_dx1 = 0; n_dx1 = 0;
n_dx2 = 0; n_dx2 = 0;
@ -1734,33 +1759,7 @@ void psxgpu_device::GouraudPolygon( int n_points )
SOLIDSETUP SOLIDSETUP
if( n_points == 4 ) FINDTOPLEFT( GouraudPolygon )
{
p_n_rightpointlist = m_p_n_nextpointlist4;
p_n_leftpointlist = m_p_n_prevpointlist4;
}
else
{
p_n_rightpointlist = m_p_n_nextpointlist3;
p_n_leftpointlist = m_p_n_prevpointlist3;
}
for( n_point = 0; n_point < n_points; n_point++ )
{
ADJUST_COORD( m_packet.GouraudPolygon.vertex[ n_point ].n_coord );
}
n_leftpoint = 0;
for( n_point = 1; n_point < n_points; n_point++ )
{
if( COORD_Y( m_packet.GouraudPolygon.vertex[ n_point ].n_coord ) < COORD_Y( m_packet.GouraudPolygon.vertex[ n_leftpoint ].n_coord ) ||
( COORD_Y( m_packet.GouraudPolygon.vertex[ n_point ].n_coord ) == COORD_Y( m_packet.GouraudPolygon.vertex[ n_leftpoint ].n_coord ) &&
COORD_X( m_packet.GouraudPolygon.vertex[ n_point ].n_coord ) < COORD_X( m_packet.GouraudPolygon.vertex[ n_leftpoint ].n_coord ) ) )
{
n_leftpoint = n_point;
}
}
n_rightpoint = n_leftpoint;
n_dx1 = 0; n_dx1 = 0;
n_dx2 = 0; n_dx2 = 0;
@ -1979,33 +1978,7 @@ void psxgpu_device::GouraudTexturedPolygon( int n_points )
decode_tpage( m_packet.GouraudTexturedPolygon.vertex[ 1 ].n_texture.w.h ); decode_tpage( m_packet.GouraudTexturedPolygon.vertex[ 1 ].n_texture.w.h );
TEXTURESETUP TEXTURESETUP
if( n_points == 4 ) FINDTOPLEFT( GouraudTexturedPolygon )
{
p_n_rightpointlist = m_p_n_nextpointlist4;
p_n_leftpointlist = m_p_n_prevpointlist4;
}
else
{
p_n_rightpointlist = m_p_n_nextpointlist3;
p_n_leftpointlist = m_p_n_prevpointlist3;
}
for( n_point = 0; n_point < n_points; n_point++ )
{
ADJUST_COORD( m_packet.GouraudTexturedPolygon.vertex[ n_point ].n_coord );
}
n_leftpoint = 0;
for( n_point = 1; n_point < n_points; n_point++ )
{
if( COORD_Y( m_packet.GouraudTexturedPolygon.vertex[ n_point ].n_coord ) < COORD_Y( m_packet.GouraudTexturedPolygon.vertex[ n_leftpoint ].n_coord ) ||
( COORD_Y( m_packet.GouraudTexturedPolygon.vertex[ n_point ].n_coord ) == COORD_Y( m_packet.GouraudTexturedPolygon.vertex[ n_leftpoint ].n_coord ) &&
COORD_X( m_packet.GouraudTexturedPolygon.vertex[ n_point ].n_coord ) < COORD_X( m_packet.GouraudTexturedPolygon.vertex[ n_leftpoint ].n_coord ) ) )
{
n_leftpoint = n_point;
}
}
n_rightpoint = n_leftpoint;
n_dx1 = 0; n_dx1 = 0;
n_dx2 = 0; n_dx2 = 0;