From: Brian Paul Date: Tue, 18 Jul 2000 16:55:56 +0000 (+0000) Subject: Fixed off-by-one error in compute_shine_table(). Minor code clean-up X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a0faa7f0ec61ed1fc404b0cd88ab160e907b4a07;p=mesa.git Fixed off-by-one error in compute_shine_table(). Minor code clean-up --- diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c index 6f2eb16fd25..eb5c83135e3 100644 --- a/src/mesa/main/light.c +++ b/src/mesa/main/light.c @@ -1,4 +1,4 @@ -/* $Id: light.c,v 1.15 2000/06/29 04:56:30 brianp Exp $ */ +/* $Id: light.c,v 1.16 2000/07/18 16:55:56 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -1119,26 +1119,27 @@ _mesa_GetMaterialiv( GLenum face, GLenum pname, GLint *params ) * Whenever the spotlight exponent for a light changes we must call * this function to recompute the exponent lookup table. */ -void gl_compute_spot_exp_table( struct gl_light *l ) +void +gl_compute_spot_exp_table( struct gl_light *l ) { - int i; - double exponent = l->SpotExponent; - double tmp = 0; - int clamp = 0; + GLint i; + GLdouble exponent = l->SpotExponent; + GLdouble tmp = 0; + GLint clamp = 0; l->SpotExpTable[0][0] = 0.0; - for (i=EXP_TABLE_SIZE-1;i>0;i--) { + for (i = EXP_TABLE_SIZE - 1; i > 0 ;i--) { if (clamp == 0) { - tmp = pow(i/(double)(EXP_TABLE_SIZE-1), exponent); - if (tmp < FLT_MIN*100.0) { + tmp = pow(i / (GLdouble) (EXP_TABLE_SIZE - 1), exponent); + if (tmp < FLT_MIN * 100.0) { tmp = 0.0; clamp = 1; } } l->SpotExpTable[i][0] = tmp; } - for (i=0;iSpotExpTable[i][1] = l->SpotExpTable[i+1][0] - l->SpotExpTable[i][0]; } l->SpotExpTable[EXP_TABLE_SIZE-1][1] = 0.0; @@ -1151,30 +1152,36 @@ void gl_compute_spot_exp_table( struct gl_light *l ) * lighting, and the cost of doing it early may be partially offset * by keeping a MRU cache of shine tables for various shine values. */ -static void compute_shine_table( struct gl_shine_tab *tab, GLfloat shininess ) +static void +compute_shine_table( struct gl_shine_tab *tab, GLfloat shininess ) { - int i; + GLint i; GLfloat *m = tab->tab; - m[0] = 0; - if (shininess == 0) { + m[0] = 0.0; + if (shininess == 0.0) { for (i = 1 ; i <= SHINE_TABLE_SIZE ; i++) - m[i] = 1; - } else { - for (i = 1 ; i <= SHINE_TABLE_SIZE ; i++) { - double t = pow( i/(GLfloat)SHINE_TABLE_SIZE, shininess ); - m[i] = 0; - if (t > 1e-20) m[i] = t; + m[i] = 1.0; + } + else { + for (i = 1 ; i < SHINE_TABLE_SIZE ; i++) { + GLdouble t = pow(i / (GLfloat) (SHINE_TABLE_SIZE - 1), shininess); + if (t > 1e-20) + m[i] = t; + else + m[i] = 0.0; } + m[SHINE_TABLE_SIZE] = 1.0; } tab->shininess = shininess; } -#define DISTSQR(a,b) ((a-b)*(a-b)) -void gl_compute_shine_table( GLcontext *ctx, GLuint i, GLfloat shininess ) +void +gl_compute_shine_table( GLcontext *ctx, GLuint i, GLfloat shininess ) { +#define DISTSQR(a,b) ((a-b)*(a-b)) struct gl_shine_tab *list = ctx->ShineTabList; struct gl_shine_tab *s; @@ -1182,10 +1189,10 @@ void gl_compute_shine_table( GLcontext *ctx, GLuint i, GLfloat shininess ) if ( DISTSQR(s->shininess, shininess) < 1e-4 ) break; - if (s == list) - { + if (s == list) { foreach(s, list) - if (s->refcount == 0) break; + if (s->refcount == 0) + break; compute_shine_table( s, shininess ); } @@ -1194,12 +1201,14 @@ void gl_compute_shine_table( GLcontext *ctx, GLuint i, GLfloat shininess ) ctx->ShineTable[i] = s; move_to_tail( list, s ); s->refcount++; +#undef DISTSQR } #if 0 -static void gl_reinit_light_attrib( GLcontext *ctx, struct gl_light_attrib *l ) +static void +gl_reinit_light_attrib( GLcontext *ctx, struct gl_light_attrib *l ) { GLuint i; @@ -1228,7 +1237,8 @@ static void gl_reinit_light_attrib( GLcontext *ctx, struct gl_light_attrib *l ) * Also, precompute some lighting values such as the products of light * source and material ambient, diffuse and specular coefficients. */ -void gl_update_lighting( GLcontext *ctx ) +void +gl_update_lighting( GLcontext *ctx ) { struct gl_light *light; @@ -1303,7 +1313,8 @@ void gl_update_lighting( GLcontext *ctx ) /* Need to seriously restrict the circumstances under which these * calc's are performed. */ -void gl_compute_light_positions( GLcontext *ctx ) +void +gl_compute_light_positions( GLcontext *ctx ) { struct gl_light *light; @@ -1375,10 +1386,8 @@ void gl_compute_light_positions( GLcontext *ctx ) } - - - -void gl_update_normal_transform( GLcontext *ctx ) +void +gl_update_normal_transform( GLcontext *ctx ) { GLuint new_flag = 0; normal_func *last = ctx->NormalTransform; @@ -1399,20 +1408,18 @@ void gl_update_normal_transform( GLcontext *ctx ) new_flag = ctx->NewState & NEW_MODELVIEW; ctx->vb_rescale_factor = ctx->rescale_factor; - if (ctx->Transform.Normalize) - { + if (ctx->Transform.Normalize) { ctx->NormalTransform = gl_normal_tab[transform | NORM_NORMALIZE]; } else if (ctx->Transform.RescaleNormals && - ctx->rescale_factor != 1.0) - { + ctx->rescale_factor != 1.0) { ctx->NormalTransform = gl_normal_tab[transform | NORM_RESCALE]; } - else - { + else { ctx->NormalTransform = gl_normal_tab[transform]; } - } else { + } + else { ctx->NormalTransform = 0; } } @@ -1420,20 +1427,18 @@ void gl_update_normal_transform( GLcontext *ctx ) if (ctx->NeedNormals) { ctx->vb_rescale_factor = 1.0/ctx->rescale_factor; - if (ctx->Transform.Normalize) - { + if (ctx->Transform.Normalize) { ctx->NormalTransform = gl_normal_tab[NORM_NORMALIZE]; } else if (!ctx->Transform.RescaleNormals && - ctx->rescale_factor != 1.0) - { + ctx->rescale_factor != 1.0) { ctx->NormalTransform = gl_normal_tab[NORM_RESCALE]; } - else - { + else { ctx->NormalTransform = 0; } - } else { + } + else { ctx->NormalTransform = 0; } } @@ -1441,4 +1446,3 @@ void gl_update_normal_transform( GLcontext *ctx ) if (last != ctx->NormalTransform || new_flag) ctx->NewState |= NEW_NORMAL_TRANSFORM; } -