diff options
Diffstat (limited to 'src/mesa/main/fog.c')
-rw-r--r-- | src/mesa/main/fog.c | 104 |
1 files changed, 1 insertions, 103 deletions
diff --git a/src/mesa/main/fog.c b/src/mesa/main/fog.c index 97bf52fc998..9593fa2a976 100644 --- a/src/mesa/main/fog.c +++ b/src/mesa/main/fog.c @@ -1,4 +1,4 @@ -/* $Id: fog.c,v 1.28 2000/11/05 18:40:58 keithw Exp $ */ +/* $Id: fog.c,v 1.29 2000/11/16 21:05:35 keithw Exp $ */ /* * Mesa 3-D graphics library @@ -32,10 +32,7 @@ #include "colormac.h" #include "context.h" #include "fog.h" -#include "macros.h" -#include "mmath.h" #include "types.h" -#include "xform.h" #endif @@ -146,102 +143,3 @@ _mesa_Fogfv( GLenum pname, const GLfloat *params ) } - - - -static GLvector1f *get_fogcoord_ptr( GLcontext *ctx, GLvector1f *tmp ) -{ - struct vertex_buffer *VB = ctx->VB; - - if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT) { - if (!ctx->_NeedEyeCoords) { - GLfloat *m = ctx->ModelView.m; - GLfloat plane[4]; - - plane[0] = m[2]; - plane[1] = m[6]; - plane[2] = m[10]; - plane[3] = m[14]; - - /* Full eye coords weren't required, just calculate the - * eye Z values. - */ - gl_dotprod_tab[0][VB->ObjPtr->size](&VB->Eye, 2, - VB->ObjPtr, plane, 0 ); - - tmp->data = &(VB->Eye.data[0][2]); - tmp->start = VB->Eye.start+2; - tmp->stride = VB->Eye.stride; - return tmp; - } - else - { - if (VB->EyePtr->size < 2) - gl_vector4f_clean_elem( &VB->Eye, VB->Count, 2 ); - - tmp->data = &(VB->EyePtr->data[0][2]); - tmp->start = VB->EyePtr->start+2; - tmp->stride = VB->EyePtr->stride; - return tmp; - } - } else - return VB->FogCoordPtr; -} - - -/* Use lookup table & interpolation? - */ -static void -make_win_fog_coords( struct vertex_buffer *VB, - GLvector1f *fogcoord) -{ - const GLcontext *ctx = VB->ctx; - GLfloat end = ctx->Fog.End; - GLfloat *v = fogcoord->start; - GLuint stride = fogcoord->stride; - GLuint n = VB->Count - VB->Start; - GLfloat *out; - GLfloat d; - GLuint i; - - VB->FogCoordPtr = VB->store.FogCoord; - out = VB->FogCoordPtr->data + VB->Start; - - switch (ctx->Fog.Mode) { - case GL_LINEAR: - d = 1.0F / (ctx->Fog.End - ctx->Fog.Start); - for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) { - out[i] = (end - ABSF(*v)) * d; - if (0) fprintf(stderr, "z %f out %f\n", *v, out[i]); - } - break; - case GL_EXP: - d = -ctx->Fog.Density; - for ( i = 0 ; i < n ; i++, STRIDE_F(v,stride)) { - out[i] = exp( d*ABSF(*v) ); - if (0) fprintf(stderr, "z %f out %f\n", *v, out[i]); - } - break; - case GL_EXP2: - d = -(ctx->Fog.Density*ctx->Fog.Density); - for ( i = 0 ; i < n ; i++, STRIDE_F(v, stride)) { - GLfloat z = *v; - out[i] = exp( d*z*z ); - if (0) fprintf(stderr, "z %f out %f\n", *v, out[i]); - } - break; - default: - gl_problem(ctx, "Bad fog mode in make_fog_coord"); - return; - } -} - - -void -_mesa_make_win_fog_coords( struct vertex_buffer *VB ) -{ - GLvector1f tmp; - - make_win_fog_coords( VB, get_fogcoord_ptr( VB->ctx, &tmp ) ); -} - |