You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
5.5 KiB
152 lines
5.5 KiB
#ifndef __CLIPPER_HPP_
|
|
#define __CLIPPER_HPP_
|
|
|
|
//----------------------------------------------------------------------------
|
|
// Clipping macros
|
|
//----------------------------------------------------------------------------
|
|
// Interpolation flags
|
|
#define RDCLIP_INTERPOLATE_COLOR (1<< 0)
|
|
#define RDCLIP_INTERPOLATE_SPECULAR (1<< 1)
|
|
#define RDCLIP_INTERPOLATE_TEXTURE (1<< 2)
|
|
#define RDCLIP_INTERPOLATE_S (1<< 3)
|
|
#define RDCLIP_INTERPOLATE_FOG (1<< 4)
|
|
|
|
// Non guardband clipping bits
|
|
#define RDCLIP_LEFT D3DCS_LEFT
|
|
#define RDCLIP_RIGHT D3DCS_RIGHT
|
|
#define RDCLIP_TOP D3DCS_TOP
|
|
#define RDCLIP_BOTTOM D3DCS_BOTTOM
|
|
#define RDCLIP_FRONT D3DCS_FRONT
|
|
#define RDCLIP_BACK D3DCS_BACK
|
|
|
|
//----------------------------------------------------------------------------
|
|
// User define clip plane bits.
|
|
// Each of these bits is set if the vertex is clipped by the associated
|
|
// clip plane.
|
|
//----------------------------------------------------------------------------
|
|
#define RDCLIP_USERCLIPPLANE0 D3DCS_PLANE0
|
|
#define RDCLIP_USERCLIPPLANE1 D3DCS_PLANE1
|
|
#define RDCLIP_USERCLIPPLANE2 D3DCS_PLANE2
|
|
#define RDCLIP_USERCLIPPLANE3 D3DCS_PLANE3
|
|
#define RDCLIP_USERCLIPPLANE4 D3DCS_PLANE4
|
|
#define RDCLIP_USERCLIPPLANE5 D3DCS_PLANE5
|
|
const DWORD RDCLIP_USERPLANES_ALL = (RDCLIP_USERCLIPPLANE0 |
|
|
RDCLIP_USERCLIPPLANE1 |
|
|
RDCLIP_USERCLIPPLANE2 |
|
|
RDCLIP_USERCLIPPLANE3 |
|
|
RDCLIP_USERCLIPPLANE4 |
|
|
RDCLIP_USERCLIPPLANE5 );
|
|
|
|
//---------------------------------------------------------------------
|
|
// Guard band clipping bits
|
|
//
|
|
// A guard bit is set when a point is out of guard band
|
|
// Guard bits should be cleared before a call to clip a triangle, because
|
|
// they are the same as CLIPPED_... bits
|
|
//
|
|
// Example of clipping bits setting for X coordinate:
|
|
//
|
|
// if -w < x < w no clipping bit is set
|
|
// if -w*ax1 < x <= -w RDCLIP_LEFT bit is set
|
|
// if x < -w*ax1 RDCLIPGB_LEFT bit is set
|
|
//---------------------------------------------------------------------
|
|
|
|
#define RDCLIPGB_LEFT (RDCLIP_USERCLIPPLANE5 << 1)
|
|
#define RDCLIPGB_RIGHT (RDCLIP_USERCLIPPLANE5 << 2)
|
|
#define RDCLIPGB_TOP (RDCLIP_USERCLIPPLANE5 << 3)
|
|
#define RDCLIPGB_BOTTOM (RDCLIP_USERCLIPPLANE5 << 4)
|
|
|
|
|
|
|
|
|
|
#define RDCLIP_ALL (RDCLIP_LEFT | RDCLIP_RIGHT | \
|
|
RDCLIP_TOP | RDCLIP_BOTTOM | \
|
|
RDCLIP_FRONT | RDCLIP_BACK | \
|
|
RDCLIP_USERPLANES_ALL)
|
|
|
|
#define RDCLIPGB_ALL (RDCLIPGB_LEFT | RDCLIPGB_RIGHT | \
|
|
RDCLIPGB_TOP | RDCLIPGB_BOTTOM | \
|
|
RDCLIP_FRONT | RDCLIP_BACK | \
|
|
RDCLIP_USERPLANES_ALL)
|
|
|
|
// If only these bits are set, then this point is inside the guard band
|
|
#define RDCLIP_INGUARDBAND (RDCLIP_LEFT | RDCLIP_RIGHT | \
|
|
RDCLIP_TOP | RDCLIP_BOTTOM)
|
|
//---------------------------------------------------------------------
|
|
// Bit numbers for each clip flag
|
|
//
|
|
#define RDCLIP_LEFTBIT 1
|
|
#define RDCLIP_RIGHTBIT 2
|
|
#define RDCLIP_TOPBIT 3
|
|
#define RDCLIP_BOTTOMBIT 4
|
|
#define RDCLIP_FRONTBIT 5
|
|
#define RDCLIP_BACKBIT 6
|
|
|
|
#define RDCLIP_USERCLIPLANE0BIT 7
|
|
#define RDCLIP_USERCLIPLANE1BIT 8
|
|
#define RDCLIP_USERCLIPLANE2BIT 9
|
|
#define RDCLIP_USERCLIPLANE3BIT 10
|
|
#define RDCLIP_USERCLIPLANE4BIT 11
|
|
#define RDCLIP_USERCLIPLANE5BIT 12
|
|
|
|
#define RDCLIPGB_LEFTBIT 13
|
|
#define RDCLIPGB_RIGHTBIT 14
|
|
#define RDCLIPGB_TOPBIT 15
|
|
#define RDCLIPGB_BOTTOMBIT 16
|
|
|
|
#define CLIPPED_LEFT (RDCLIP_USERCLIPPLANE5 << 1)
|
|
#define CLIPPED_RIGHT (RDCLIP_USERCLIPPLANE5 << 2)
|
|
#define CLIPPED_TOP (RDCLIP_USERCLIPPLANE5 << 3)
|
|
#define CLIPPED_BOTTOM (RDCLIP_USERCLIPPLANE5 << 4)
|
|
#define CLIPPED_FRONT (RDCLIP_USERCLIPPLANE5 << 5)
|
|
#define CLIPPED_BACK (RDCLIP_USERCLIPPLANE5 << 6)
|
|
|
|
#define CLIPPED_ENABLE (RDCLIP_USERCLIPPLANE5 << 7) // wireframe enable flag
|
|
|
|
#define CLIPPED_ALL (CLIPPED_LEFT|CLIPPED_RIGHT \
|
|
|CLIPPED_TOP|CLIPPED_BOTTOM \
|
|
|CLIPPED_FRONT|CLIPPED_BACK)
|
|
|
|
const DWORD CLIPPED_USERCLIPPLANE0 = RDCLIP_USERCLIPPLANE5 << 8;
|
|
const DWORD CLIPPED_USERCLIPPLANE1 = RDCLIP_USERCLIPPLANE5 << 9;
|
|
const DWORD CLIPPED_USERCLIPPLANE2 = RDCLIP_USERCLIPPLANE5 << 10;
|
|
const DWORD CLIPPED_USERCLIPPLANE3 = RDCLIP_USERCLIPPLANE5 << 11;
|
|
const DWORD CLIPPED_USERCLIPPLANE4 = RDCLIP_USERCLIPPLANE5 << 12;
|
|
const DWORD CLIPPED_USERCLIPPLANE5 = RDCLIP_USERCLIPPLANE5 << 13;
|
|
|
|
|
|
//---------------------------------------------------------------------
|
|
// Make RDVertex from clip vertex
|
|
//
|
|
// in - clipVertex
|
|
// out - RD vertex
|
|
//---------------------------------------------------------------------
|
|
inline void
|
|
MakeVertexFromClipVertex( RDVertex& v, RDClipVertex& cv )
|
|
{
|
|
memcpy( &v, &cv, sizeof( RDVertex ) );
|
|
#if 0
|
|
v.m_rhw = D3DVAL(1)/cv.m_clip_w;
|
|
#endif
|
|
}
|
|
|
|
//---------------------------------------------------------------------
|
|
// Returns TRUE if clipping is needed
|
|
//---------------------------------------------------------------------
|
|
inline BOOL
|
|
NeedClipping(BOOL bUseGB, RDCLIPCODE clipUnion)
|
|
{
|
|
if( bUseGB && (clipUnion & ~RDCLIP_INGUARDBAND) )
|
|
{
|
|
return TRUE;
|
|
}
|
|
else if( clipUnion )
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
#endif //__CLIPPER_HPP_
|