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/* |
* Mesa 3-D graphics library |
* Version: 3.5 |
* |
* Copyright (C) 1999-2001 Brian Paul All Rights Reserved. |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice shall be included |
* in all copies or substantial portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
* |
* Authors: |
* Gareth Hughes <gareth@valinux.com> |
* Keith Whitwell <keith_whitwell@yahoo.com> |
*/ |
|
/* Template for immediate mode normal functions. Optimize for infinite |
* lights when doing software lighting. |
*/ |
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static void TAG(Normal3f_single)( GLfloat x, GLfloat y, GLfloat z ) |
{ |
GET_CURRENT_VERTEX; |
const struct gl_light *light = ctx->Light.EnabledList.prev; |
GLfloat n_dot_h, n_dot_VP, spec, sum[3]; |
GLfloat *normal = ctx->Current.Normal; |
GLfloat scale = 1.0; |
|
ASSIGN_3V( normal, x, y, z ); |
COPY_3V( sum, BASE_COLOR ); |
|
if ( IND & NORM_RESCALE ) { |
scale = ctx->_ModelViewInvScale; |
} else if ( IND & NORM_NORMALIZE ) { |
scale = LEN_3FV( normal ); |
if ( scale != 0.0 ) scale = 1.0 / scale; |
} |
|
n_dot_VP = DOT3( normal, light->_VP_inf_norm ) * scale; |
if ( n_dot_VP > 0.0F ) { |
ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] ); |
n_dot_h = DOT3( normal, light->_h_inf_norm ) * scale; |
if ( n_dot_h > 0.0F ) { |
GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec ); |
ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] ); |
} |
} |
|
#ifdef LIT_COLOR_IS_FLOAT |
LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f); |
LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f); |
LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f); |
#else |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] ); |
#endif |
LIT_COLOR( ACOMP ) = LIT_ALPHA; |
} |
|
static void TAG(Normal3fv_single)( const GLfloat *normal ) |
{ |
GET_CURRENT_VERTEX; |
const struct gl_light *light = ctx->Light.EnabledList.prev; |
GLfloat n_dot_h, n_dot_VP, spec, sum[3]; |
GLfloat scale = 1.0; |
|
COPY_3V( ctx->Current.Normal, normal ); |
COPY_3V( sum, BASE_COLOR ); |
|
if ( IND & NORM_RESCALE ) { |
scale = ctx->_ModelViewInvScale; |
} else if ( IND & NORM_NORMALIZE ) { |
scale = LEN_3FV( normal ); |
if ( scale != 0.0 ) scale = 1.0 / scale; |
} |
|
n_dot_VP = DOT3( normal, light->_VP_inf_norm ) * scale; |
if ( n_dot_VP > 0.0F ) { |
ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] ); |
n_dot_h = DOT3( normal, light->_h_inf_norm ) * scale; |
if ( n_dot_h > 0.0F ) { |
GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec ); |
ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] ); |
} |
} |
|
#ifdef LIT_COLOR_IS_FLOAT |
LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f); |
LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f); |
LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f); |
#else |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] ); |
#endif |
LIT_COLOR( ACOMP ) = LIT_ALPHA; |
} |
|
|
static void TAG(Normal3f_multi)( GLfloat x, GLfloat y, GLfloat z ) |
{ |
GET_CURRENT_VERTEX; |
struct gl_light *light; |
GLfloat n_dot_h, n_dot_VP, spec, sum[3], tmp[3]; |
GLfloat *normal; |
|
ASSIGN_3V( ctx->Current.Normal, x, y, z ); |
COPY_3V( sum, BASE_COLOR ); |
|
if ( IND & NORM_RESCALE ) { |
normal = tmp; |
ASSIGN_3V( normal, x, y, z ); |
SELF_SCALE_SCALAR_3V( normal, ctx->_ModelViewInvScale ); |
} else if ( IND & NORM_NORMALIZE ) { |
normal = tmp; |
ASSIGN_3V( normal, x, y, z ); |
NORMALIZE_3FV( normal ); |
} else { |
normal = ctx->Current.Normal; |
} |
|
foreach ( light, &ctx->Light.EnabledList ) { |
n_dot_VP = DOT3( normal, light->_VP_inf_norm ); |
if ( n_dot_VP > 0.0F ) { |
ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] ); |
n_dot_h = DOT3( normal, light->_h_inf_norm ); |
if ( n_dot_h > 0.0F ) { |
GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec ); |
ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] ); |
} |
} |
} |
|
#ifdef LIT_COLOR_IS_FLOAT |
LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f); |
LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f); |
LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f); |
#else |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] ); |
#endif |
LIT_COLOR( ACOMP ) = LIT_ALPHA; |
} |
|
static void TAG(Normal3fv_multi)( const GLfloat *n ) |
{ |
GET_CURRENT_VERTEX; |
struct gl_light *light; |
GLfloat n_dot_h, n_dot_VP, spec, sum[3], tmp[3]; |
GLfloat *normal; |
|
COPY_3V( ctx->Current.Normal, n ); |
COPY_3V( sum, BASE_COLOR ); |
|
if ( IND & NORM_RESCALE ) { |
normal = tmp; |
COPY_3V( normal, n ); |
SELF_SCALE_SCALAR_3V( normal, ctx->_ModelViewInvScale ); |
} else if ( IND & NORM_NORMALIZE ) { |
normal = tmp; |
COPY_3V( normal, n ); |
NORMALIZE_3FV( normal ); |
} else { |
normal = ctx->Current.Normal; |
} |
|
foreach ( light, &ctx->Light.EnabledList ) { |
n_dot_VP = DOT3( normal, light->_VP_inf_norm ); |
if ( n_dot_VP > 0.0F ) { |
ACC_SCALE_SCALAR_3V( sum, n_dot_VP, light->_MatDiffuse[0] ); |
n_dot_h = DOT3( normal, light->_h_inf_norm ); |
if ( n_dot_h > 0.0F ) { |
GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec ); |
ACC_SCALE_SCALAR_3V( sum, spec, light->_MatSpecular[0] ); |
} |
} |
} |
|
#ifdef LIT_COLOR_IS_FLOAT |
LIT_COLOR ( RCOMP ) = CLAMP(sum[0], 0.0f, 0.1f); |
LIT_COLOR ( GCOMP ) = CLAMP(sum[1], 0.0f, 0.1f); |
LIT_COLOR ( BCOMP ) = CLAMP(sum[2], 0.0f, 0.1f); |
#else |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( RCOMP ), sum[0] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( GCOMP ), sum[1] ); |
UNCLAMPED_FLOAT_TO_UBYTE( LIT_COLOR( BCOMP ), sum[2] ); |
#endif |
LIT_COLOR( ACOMP ) = LIT_ALPHA; |
} |
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|
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static void TAG(init_norm)( void ) |
{ |
norm_tab[IND].normal3f_single = TAG(Normal3f_single); |
norm_tab[IND].normal3fv_single = TAG(Normal3fv_single); |
norm_tab[IND].normal3f_multi = TAG(Normal3f_multi); |
norm_tab[IND].normal3fv_multi = TAG(Normal3fv_multi); |
} |
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#ifndef PRESERVE_NORMAL_DEFS |
#undef GET_CURRENT |
#undef GET_CURRENT_VERTEX |
#undef LIT_COLOR |
#undef LIT_COLOR_IS_FLOAT |
#endif |
#undef PRESERVE_NORMAL_DEFS |
#undef IND |
#undef TAG |