494 lines
13 KiB
C++
494 lines
13 KiB
C++
// Copyright (C) 2007 Id Software, Inc.
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//
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#ifndef __DRAWVERT_H__
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#define __DRAWVERT_H__
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/*
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===============================================================================
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Draw Vertex.
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===============================================================================
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*/
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#pragma pack( push, 1 )
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class idDrawVert {
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public:
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/*
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The sizeof idDrawVert should be at least a multiple of 16 bytes to make the VMX128 code work.
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Ideally the sizeof idDrawVert will be a power of two to make indexing fast.
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*/
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec3 xyz;
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byte color[4];
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short _normal[2];
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short _tangent[2];
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byte _signs[4]; // 0 == normal z, 1 == tangent.z, 2 == bitangent sign, 3 == unused
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short _st[2];
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#else
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idVec3 xyz;
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byte color[4];
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idVec3 _normal;
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byte _color2[4];
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idVec4 _tangent; // [3] is texture polarity sign
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idVec2 _st;
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idVec2 _st2;
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#endif
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float operator[]( const int index ) const;
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float & operator[]( const int index );
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void Clear( void );
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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const idVec3 GetNormal( void ) const;
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#else
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const idVec3 & GetNormal( void ) const;
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#endif
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float GetNormalIdx( int idx ) const;
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void SetNormal( float x, float y, float z );
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void SetNormal( const idVec3 &n );
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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const idVec3 GetTangent( void ) const;
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const idVec4 GetTangentVec4( void ) const;
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#else
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const idVec3 & GetTangent( void ) const;
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const idVec4 & GetTangentVec4( void ) const;
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#endif
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void SetTangent( float x, float y, float z );
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void SetTangent( const idVec3 &t );
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const idVec3 GetBiTangent( void ) const; // derived from normal, tangent, and tangent flag
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void SetBiTangent( float x, float y, float z );
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void SetBiTangent( const idVec3 &t );
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float GetBiTangentSign( void ) const;
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void SetBiTangentSign( float sign ); // either 1.0f or -1.0f
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void SetColor( dword color );
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dword GetColor( void ) const;
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float GetSTIdx( int idx ) const;
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void GetST( float &s, float &t ) const;
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec2 GetST( void ) const;
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#else
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const idVec2 & GetST( void ) const;
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#endif
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void SetST( bool lowrange, const idVec2 &st );
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void SetST( float s, float t );
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void SetST( const idVec2 &st );
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void SetST( const idDrawVert &dv );
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void SetSTIdx( int i, float v );
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float GetZ( short x, short y, byte sign ) const;
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void Normalize( void );
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void Lerp( const idDrawVert &a, const idDrawVert &b, const float f );
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void LerpAll( const idDrawVert &a, const idDrawVert &b, const float f );
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bool operator==( const idDrawVert& rhs ) const;
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};
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#pragma pack( pop )
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#define ST_TO_FLOAT 1.0f / 4096.0f
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#define FLOAT_TO_ST 4096.0f
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#define ST_TO_FLOAT_LOWRANGE 1.0f / 32767.0f
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#define FLOAT_TO_ST_LOWRANGE 32767.0f
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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// offsets for SIMD code
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#define DRAWVERT_SIZE 32 // sizeof( idDrawVert )
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#define DRAWVERT_SIZE_SHIFT 5 // log2( sizeof( idDrawVert ) )
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#define DRAWVERT_XYZ_OFFSET (0*4) // offsetof( idDrawVert, xyz )
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#define DRAWVERT_NORMAL_OFFSET (4*4) // offsetof( idDrawVert, normal )
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#define DRAWVERT_TANGENT_OFFSET (5*4) // offsetof( idDrawVert, tangent )
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#else
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// offsets for SIMD code
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#define DRAWVERT_SIZE 64 // sizeof( idDrawVert )
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#define DRAWVERT_SIZE_SHIFT 6 // log2( sizeof( idDrawVert ) )
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#define DRAWVERT_XYZ_OFFSET (0*4) // offsetof( idDrawVert, xyz )
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#define DRAWVERT_NORMAL_OFFSET (4*4) // offsetof( idDrawVert, normal )
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#define DRAWVERT_TANGENT_OFFSET (8*4) // offsetof( idDrawVert, tangent )
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#endif
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assert_sizeof( idDrawVert, DRAWVERT_SIZE );
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assert_sizeof( idDrawVert, (1<<DRAWVERT_SIZE_SHIFT) );
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assert_offsetof( idDrawVert, xyz, DRAWVERT_XYZ_OFFSET );
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assert_offsetof( idDrawVert, _normal, DRAWVERT_NORMAL_OFFSET );
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assert_offsetof( idDrawVert, _tangent, DRAWVERT_TANGENT_OFFSET );
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ID_INLINE float idDrawVert::operator[]( const int index ) const {
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assert( index >= 0 && index < 5 );
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return ((float *)(&xyz))[index];
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}
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ID_INLINE float &idDrawVert::operator[]( const int index ) {
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assert( index >= 0 && index < 5 );
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return ((float *)(&xyz))[index];
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}
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ID_INLINE bool idDrawVert::operator==( const idDrawVert& rhs ) const {
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return ( rhs.xyz.Compare( xyz ) && ( rhs._st[0] == _st[0] && rhs._st[1] == _st[1] ) );
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}
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ID_INLINE void idDrawVert::Clear( void ) {
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xyz.Zero();
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_normal[0] = _normal[1] = 0;
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_tangent[0] = _tangent[1] = 0;
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_signs[0] = _signs[1] = _signs[2] = _signs[3] = 0;//128;
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_st[0] = _st[1] = 0;
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color[0] = color[1] = color[2] = color[3] = 0;
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#else
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_normal.Zero();
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_tangent.Zero();
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_st.Zero();
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_st2.Zero();
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color[0] = color[1] = color[2] = color[3] = 0;
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_color2[0] = _color2[1] = _color2[2] = _color2[3] = 0;
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#endif
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}
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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ID_INLINE const idVec3 idDrawVert::GetNormal( void ) const {
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return idVec3( _normal[0] / 32767.0f, _normal[1] / 32767.0f, GetZ( _normal[0], _normal[1], _signs[0] ) );
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}
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#else
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ID_INLINE const idVec3 &idDrawVert::GetNormal( void ) const {
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return _normal;
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}
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#endif
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ID_INLINE float idDrawVert::GetNormalIdx( int idx ) const
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{
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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if ( idx == 2 )
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{
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return GetZ( _normal[0], _normal[1], _signs[0] );
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} else
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{
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return _normal[idx] / 32767.0f;
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}
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#else
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return _normal[idx];
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#endif
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}
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ID_INLINE void idDrawVert::SetNormal( const idVec3 &n ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_normal[0] = n.x * 32767.0f;
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_normal[1] = n.y * 32767.0f;
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_signs[0] = ( n.z > 0.0f ) ? 2 : 0;
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#else
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_normal = n;
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#endif
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}
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ID_INLINE void idDrawVert::SetNormal( float x, float y, float z ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_normal[0] = x * 32767.0f;
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_normal[1] = y * 32767.0f;
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_signs[0] = ( z > 0.0f ) ? 2 : 0;
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#else
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_normal.Set( x, y, z );
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#endif
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}
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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ID_INLINE const idVec3 idDrawVert::GetTangent( void ) const {
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return idVec3( _tangent[0] / 32767.0f, _tangent[1] / 32767.0f, GetZ( _tangent[0], _tangent[1], _signs[1] ) );
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}
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ID_INLINE const idVec4 idDrawVert::GetTangentVec4( void ) const {
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return idVec4( _tangent[0] / 32767.0f, _tangent[1] / 32767.0f, GetZ( _tangent[0], _tangent[1], _signs[1] ), GetBiTangentSign() );
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}
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#else
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ID_INLINE const idVec3& idDrawVert::GetTangent( void ) const {
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return _tangent.ToVec3();
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}
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ID_INLINE const idVec4& idDrawVert::GetTangentVec4( void ) const {
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return _tangent;
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}
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#endif
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ID_INLINE void idDrawVert::SetTangent( float x, float y, float z ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_tangent[0] = x * 32767.0f;
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_tangent[1] = y * 32767.0f;
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_signs[1] = ( z > 0.0f ) ? 2 : 0;
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#else
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_tangent.ToVec3().Set( x, y, z );
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#endif
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}
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ID_INLINE void idDrawVert::SetTangent( const idVec3 &t ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_tangent[0] = t.x * 32767.0f;
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_tangent[1] = t.y * 32767.0f;
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_signs[1] = ( t.z > 0.0f ) ? 2 : 0;
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#else
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_tangent.ToVec3() = t;
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#endif
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}
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ID_INLINE const idVec3 idDrawVert::GetBiTangent( void ) const {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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// derive from the normal, tangent, and bitangent direction flag
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idVec3 normal = GetNormal();
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idVec3 tangent = GetTangent();
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idVec3 bitangent;
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bitangent.Cross( normal, tangent );
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bitangent *= ( _signs[2] - 1.f );
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return bitangent;
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#else
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// derive from the normal, tangent, and bitangent direction flag
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idVec3 bitangent;
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bitangent.Cross( _normal, _tangent.ToVec3() );
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bitangent *= _tangent[3];
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return bitangent;
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#endif
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}
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ID_INLINE void idDrawVert::SetBiTangent( float x, float y, float z ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec3 bitangent;
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bitangent.Cross( GetNormal(), GetTangent() );
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_signs[2] = ( bitangent.x * x + bitangent.y * y + bitangent.z * z > 0.0f ) ? 2 : 0;
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#else
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idVec3 bitangent;
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bitangent.Cross( _normal, _tangent.ToVec3() );
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_tangent[3] = ( bitangent.x * x + bitangent.y * y + bitangent.z * z > 0.0f ) ? 1.0f : -1.0f;
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#endif
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}
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ID_INLINE void idDrawVert::SetBiTangent( const idVec3 &t ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec3 bitangent;
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bitangent.Cross( GetNormal(), GetTangent() );
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_signs[2] = ( bitangent.x * t.x + bitangent.y * t.y + bitangent.z * t.z > 0.0f ) ? 2 : 0;
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#else
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_tangent[3] = idVec3::BiTangentSign( _normal, _tangent.ToVec3(), t );
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#endif
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}
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ID_INLINE float idDrawVert::GetBiTangentSign( void ) const {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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return (_signs[2] - 1.f);
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#else
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return _tangent.w;
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#endif
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}
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ID_INLINE void idDrawVert::SetBiTangentSign( float sign ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_signs[2] = sign > 0.f ? 2 : 0;
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#else
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_tangent[3] = sign;
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#endif
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}
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ID_INLINE void idDrawVert::SetColor( dword color ) {
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*reinterpret_cast<dword *>(this->color) = color;
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}
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ID_INLINE dword idDrawVert::GetColor( void ) const {
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return *reinterpret_cast<const dword *>(this->color);
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}
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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ID_INLINE idVec2 idDrawVert::GetST( void ) const {
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return idVec2( (float)_st[0] * ST_TO_FLOAT, (float)_st[1] * ST_TO_FLOAT );
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}
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#else
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ID_INLINE const idVec2& idDrawVert::GetST( void ) const {
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return _st;
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}
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#endif
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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ID_INLINE void idDrawVert::GetST( float &s, float &t ) const {
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s = (float)_st[0] * ST_TO_FLOAT;
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t = (float)_st[1] * ST_TO_FLOAT;
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}
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#else
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ID_INLINE void idDrawVert::GetST( float &s, float &t ) const {
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s = _st[0];
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t = _st[1];
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}
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#endif
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ID_INLINE float idDrawVert::GetSTIdx( int idx ) const {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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return _st[idx] * ST_TO_FLOAT;
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#else
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return _st[idx];
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#endif
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}
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ID_INLINE void idDrawVert::SetST( float s, float t ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_st[0] = (short)(s * FLOAT_TO_ST);
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_st[1] = (short)(t * FLOAT_TO_ST);
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#else
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_st[0] = s;
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_st[1] = t;
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#if 0
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if ( _st[0] < -8.f || _st[0] > (32767/4096.f)) {
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assert(0);
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}
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if ( _st[1] < -8.f || _st[1] > (32767/4096.f)) {
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assert(0);
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}
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#endif
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#endif
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}
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ID_INLINE void idDrawVert::SetST( bool lowrange, const idVec2 &st ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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if ( lowrange ) {
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this->_st[0] = (short)(st.x * FLOAT_TO_ST_LOWRANGE);
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this->_st[1] = (short)(st.y * FLOAT_TO_ST_LOWRANGE);
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} else {
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this->_st[0] = (short)(st.x * FLOAT_TO_ST);
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this->_st[1] = (short)(st.y * FLOAT_TO_ST);
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}
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#else
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this->_st = st;
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#if 0
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if ( _st[0] < -8.f || _st[0] > (32767/4096.f)) {
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assert(0);
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}
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if ( _st[1] < -8.f || _st[1] > (32767/4096.f)) {
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assert(0);
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}
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#endif
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#endif
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}
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ID_INLINE void idDrawVert::SetST( const idVec2 &st ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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this->_st[0] = (short)(st.x * FLOAT_TO_ST);
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this->_st[1] = (short)(st.y * FLOAT_TO_ST);
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#else
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this->_st = st;
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#if 0
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if ( _st[0] < -8.f || _st[0] > (32767/4096.f)) {
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assert(0);
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}
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if ( _st[1] < -8.f || _st[1] > (32767/4096.f)) {
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assert(0);
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}
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#endif
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#endif
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}
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ID_INLINE void idDrawVert::SetST( const idDrawVert &dv ) {
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_st[0] = dv._st[0];
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_st[1] = dv._st[1];
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#if 0
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if ( _st[0] < -8.f || _st[0] > (32767/4096.f)) {
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assert(0);
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}
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if ( _st[1] < -8.f || _st[1] > (32767/4096.f)) {
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assert(0);
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}
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#endif
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}
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ID_INLINE void idDrawVert::SetSTIdx( int idx, float v ) {
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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_st[idx] = (short)(v * FLOAT_TO_ST);
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#else
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_st[idx] = v;
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#if 0
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if ( _st[0] < -8.f || _st[0] > (32767/4096.f)) {
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assert(0);
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}
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if ( _st[1] < -8.f || _st[1] > (32767/4096.f)) {
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assert(0);
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}
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#endif
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#endif
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}
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ID_INLINE float idDrawVert::GetZ( short x, short y, byte sign ) const {
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float v = 1.0f - ( x * x + y * y ) / ( 32767.0f * 32767.0f );
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float sqrtv = v > 0.f ? sqrtf( v ) : 0.f;
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return sqrtv * ( (float)sign - 1.f );
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}
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ID_INLINE void idDrawVert::Lerp( const idDrawVert &a, const idDrawVert &b, const float f ) {
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xyz = a.xyz + f * ( b.xyz - a.xyz );
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec2 aST = a.GetST();
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idVec2 bST = b.GetST();
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SetST( aST + f * ( bST - aST ) );
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#else
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_st = a._st + f * ( b._st - a._st );
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#endif
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}
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ID_INLINE void idDrawVert::LerpAll( const idDrawVert &a, const idDrawVert &b, const float f ) {
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xyz = a.xyz + f * ( b.xyz - a.xyz );
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#if defined( SD_USE_DRAWVERT_SIZE_32 )
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idVec2 ST = a.GetST() + f * ( b.GetST() - a.GetST() );
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idVec3 normal = a.GetNormal() + f * ( b.GetNormal() - a.GetNormal() );
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idVec3 tangent = a.GetTangent() + f * ( b.GetTangent() - a.GetTangent() );
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SetST( ST );
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SetNormal( normal );
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SetTangent( tangent );
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#else
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_st = a._st + f * ( b._st - a._st );
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_normal = a._normal + f * ( b._normal - a._normal );
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_tangent = a._tangent + f * ( b._tangent - a._tangent );
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#endif
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color[0] = idMath::Ftob( a.color[0] + f * ( b.color[0] - a.color[0] ) );
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color[1] = idMath::Ftob( a.color[1] + f * ( b.color[1] - a.color[1] ) );
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color[2] = idMath::Ftob( a.color[2] + f * ( b.color[2] - a.color[2] ) );
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color[3] = idMath::Ftob( a.color[3] + f * ( b.color[3] - a.color[3] ) );
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}
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typedef struct shadowCache_s {
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idVec4 xyz; // we use homogenous coordinate tricks
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} shadowCache_t;
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#define SHADOWVERT_SIZE 16 // sizeof( idDrawVert )
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#define SHADOWVERT_SIZE_SHIFT 4 // log2( sizeof( idDrawVert ) )
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assert_sizeof( shadowCache_t, SHADOWVERT_SIZE );
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assert_sizeof( shadowCache_t, (1<<SHADOWVERT_SIZE_SHIFT) );
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#endif /* !__DRAWVERT_H__ */
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