void GLAPIENTRY
gluBeginTrim(GLUnurbsObj * nobj)
{
#if 0
nurbs_trim *ptr;
#endif
if (nobj->nurbs_type != GLU_NURBS_TRIM_DONE)
if (nobj->nurbs_type != GLU_NURBS_NO_TRIM) {
call_user_error(nobj, GLU_NURBS_ERROR15);
return;
}
nobj->nurbs_type = GLU_NURBS_TRIM;
fprintf(stderr, "NURBS - trimming not supported yet\n");
#if 0
if ((ptr = (nurbs_trim *) malloc(sizeof(nurbs_trim))) == NULL) {
call_user_error(nobj, GLU_OUT_OF_MEMORY);
return;
}
if (nobj->trim) {
nurbs_trim *tmp_ptr;
for (tmp_ptr = nobj->trim; tmp_ptr->next; tmp_ptr = tmp_ptr->next);
tmp_ptr->next = ptr;
}
else
nobj->trim = ptr;
ptr->trim_loop = NULL;
ptr->segments = NULL;
ptr->next = NULL;
#endif
}
void GLAPIENTRY
gluEndCurve(GLUnurbsObj * nobj)
{
if (nobj->nurbs_type == GLU_NURBS_NONE) {
call_user_error(nobj, GLU_NURBS_ERROR7);
return;
}
if (nobj->curve.geom.type == GLU_INVALID_ENUM) {
call_user_error(nobj, GLU_NURBS_ERROR8);
nobj->nurbs_type = GLU_NURBS_NONE;
return;
}
glPushAttrib((GLbitfield) (GL_EVAL_BIT | GL_ENABLE_BIT));
glDisable(GL_MAP1_VERTEX_3);
glDisable(GL_MAP1_VERTEX_4);
glDisable(GL_MAP1_INDEX);
glDisable(GL_MAP1_COLOR_4);
glDisable(GL_MAP1_NORMAL);
glDisable(GL_MAP1_TEXTURE_COORD_1);
glDisable(GL_MAP1_TEXTURE_COORD_2);
glDisable(GL_MAP1_TEXTURE_COORD_3);
glDisable(GL_MAP1_TEXTURE_COORD_4);
glDisable(GL_MAP2_VERTEX_3);
glDisable(GL_MAP2_VERTEX_4);
glDisable(GL_MAP2_INDEX);
glDisable(GL_MAP2_COLOR_4);
glDisable(GL_MAP2_NORMAL);
glDisable(GL_MAP2_TEXTURE_COORD_1);
glDisable(GL_MAP2_TEXTURE_COORD_2);
glDisable(GL_MAP2_TEXTURE_COORD_3);
glDisable(GL_MAP2_TEXTURE_COORD_4);
do_nurbs_curve(nobj);
glPopAttrib();
nobj->nurbs_type = GLU_NURBS_NONE;
}
static GLenum
test_nurbs_surface(GLUnurbsObj *nobj, surface_attribs *attrib)
{
GLenum err;
GLint tmp_int;
if(attrib->sorder < 0 || attrib->torder < 0)
{
call_user_error(nobj,GLU_INVALID_VALUE);
return GLU_ERROR;
}
glGetIntegerv(GL_MAX_EVAL_ORDER,&tmp_int);
if(attrib->sorder > tmp_int || attrib->sorder < 2)
{
call_user_error(nobj,GLU_NURBS_ERROR1);
return GLU_ERROR;
}
if(attrib->torder > tmp_int || attrib->torder < 2)
{
call_user_error(nobj,GLU_NURBS_ERROR1);
return GLU_ERROR;
}
if(attrib->sknot_count < attrib->sorder +2)
{
call_user_error(nobj,GLU_NURBS_ERROR2);
return GLU_ERROR;
}
if(attrib->tknot_count < attrib->torder +2)
{
call_user_error(nobj,GLU_NURBS_ERROR2);
return GLU_ERROR;
}
if(attrib->s_stride < 0 || attrib->t_stride < 0)
{
call_user_error(nobj,GLU_NURBS_ERROR34);
return GLU_ERROR;
}
if(attrib->sknot==NULL || attrib->tknot==NULL || attrib->ctrlarray==NULL)
{
call_user_error(nobj,GLU_NURBS_ERROR36);
return GLU_ERROR;
}
if((err=test_knot(attrib->tknot_count,attrib->tknot,attrib->torder))
!=GLU_NO_ERROR)
{
call_user_error(nobj,err);
return GLU_ERROR;
}
if((err=test_knot(attrib->sknot_count,attrib->sknot,attrib->sorder))
!=GLU_NO_ERROR)
{
call_user_error(nobj,err);
return GLU_ERROR;
}
return GLU_NO_ERROR;
}
void GLAPIENTRY
gluPwlCurve(GLUnurbsObj * nobj, GLint count, GLfloat * array, GLint stride,
GLenum type)
{
#if 0
nurbs_trim *ptr1;
trim_list *ptr2;
#endif
if (nobj->nurbs_type == GLU_NURBS_CURVE) {
call_user_error(nobj, GLU_NURBS_ERROR9);
return;
}
if (nobj->nurbs_type == GLU_NURBS_NONE) {
call_user_error(nobj, GLU_NURBS_ERROR19);
return;
}
if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
call_user_error(nobj, GLU_NURBS_ERROR14);
return;
}
#if 0
for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
if (ptr1->trim_loop) {
for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
call_user_error(nobj, GLU_OUT_OF_MEMORY);
return;
}
ptr2 = ptr2->next;
}
else {
if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
call_user_error(nobj, GLU_OUT_OF_MEMORY);
return;
}
ptr1->trim_loop = ptr2;
}
ptr2->trim_type = GLU_TRIM_PWL;
ptr2->curve.pwl_curve.pt_count = count;
ptr2->curve.pwl_curve.ctrlarray = array;
ptr2->curve.pwl_curve.stride = stride;
ptr2->curve.pwl_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
ptr2->curve.pwl_curve.type = type;
ptr2->next = NULL;
#endif
}
void GLAPIENTRY
gluNurbsCallback(GLUnurbsObj * nobj, GLenum which, void (GLCALLBACK * fn) ())
{
nobj->error_callback = (void (GLCALLBACKPCAST) (GLenum)) fn;
if (which != GLU_ERROR)
call_user_error(nobj, GLU_INVALID_ENUM);
}
void GLAPIENTRY
gluEndSurface(GLUnurbsObj * nobj)
{
switch (nobj->nurbs_type) {
case GLU_NURBS_NONE:
call_user_error(nobj, GLU_NURBS_ERROR13);
break;
case GLU_NURBS_TRIM:
call_user_error(nobj, GLU_NURBS_ERROR12);
break;
case GLU_NURBS_TRIM_DONE:
/* if(nobj->trim->trim_loop==NULL)
{
call_user_error(nobj,GLU_NURBS_ERROR18);
return;
}*/
/* no break - fallthrough */
case GLU_NURBS_NO_TRIM:
glPushAttrib((GLbitfield)
(GL_EVAL_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT));
glDisable(GL_MAP2_VERTEX_3);
glDisable(GL_MAP2_VERTEX_4);
glDisable(GL_MAP2_INDEX);
glDisable(GL_MAP2_COLOR_4);
glDisable(GL_MAP2_NORMAL);
glDisable(GL_MAP2_TEXTURE_COORD_1);
glDisable(GL_MAP2_TEXTURE_COORD_2);
glDisable(GL_MAP2_TEXTURE_COORD_3);
glDisable(GL_MAP2_TEXTURE_COORD_4);
/* glDisable(GL_MAP1_VERTEX_3);
glDisable(GL_MAP1_VERTEX_4);
glDisable(GL_MAP1_INDEX);
glDisable(GL_MAP1_COLOR_4);
glDisable(GL_MAP1_NORMAL);
glDisable(GL_MAP1_TEXTURE_COORD_1);
glDisable(GL_MAP1_TEXTURE_COORD_2);
glDisable(GL_MAP1_TEXTURE_COORD_3);
glDisable(GL_MAP1_TEXTURE_COORD_4);*/
do_nurbs_surface(nobj);
glPopAttrib();
break;
default:
call_user_error(nobj, GLU_NURBS_ERROR8);
}
nobj->nurbs_type = GLU_NURBS_NONE;
}
void GLAPIENTRY
gluEndTrim(GLUnurbsObj * nobj)
{
if (nobj->nurbs_type != GLU_NURBS_TRIM) {
call_user_error(nobj, GLU_NURBS_ERROR17);
return;
}
nobj->nurbs_type = GLU_NURBS_TRIM_DONE;
}
void GLAPIENTRY
gluBeginCurve(GLUnurbsObj * nobj)
{
if (nobj->nurbs_type == GLU_NURBS_CURVE) {
call_user_error(nobj, GLU_NURBS_ERROR6);
return;
}
nobj->nurbs_type = GLU_NURBS_CURVE;
nobj->curve.geom.type = GLU_INVALID_ENUM;
nobj->curve.color.type = GLU_INVALID_ENUM;
nobj->curve.texture.type = GLU_INVALID_ENUM;
nobj->curve.normal.type = GLU_INVALID_ENUM;
}
void GLAPIENTRY
gluBeginSurface(GLUnurbsObj * nobj)
{
switch (nobj->nurbs_type) {
case GLU_NURBS_NONE:
nobj->nurbs_type = GLU_NURBS_SURFACE;
nobj->surface.geom.type = GLU_INVALID_ENUM;
nobj->surface.color.type = GLU_INVALID_ENUM;
nobj->surface.texture.type = GLU_INVALID_ENUM;
nobj->surface.normal.type = GLU_INVALID_ENUM;
break;
case GLU_NURBS_TRIM:
call_user_error(nobj, GLU_NURBS_ERROR16);
break;
case GLU_NURBS_SURFACE:
case GLU_NURBS_NO_TRIM:
case GLU_NURBS_TRIM_DONE:
call_user_error(nobj, GLU_NURBS_ERROR27);
break;
case GLU_NURBS_CURVE:
call_user_error(nobj, GLU_NURBS_ERROR6);
break;
}
}
void GLAPIENTRY
gluGetNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat * value)
{
switch (property) {
case GLU_SAMPLING_TOLERANCE:
*value = nobj->sampling_tolerance;
break;
case GLU_DISPLAY_MODE:
*value = (GLfloat) (GLint) nobj->display_mode;
break;
case GLU_CULLING:
*value = nobj->culling ? 1.0 : 0.0;
break;
case GLU_AUTO_LOAD_MATRIX:
*value = nobj->auto_load_matrix ? 1.0 : 0.0;
break;
default:
call_user_error(nobj, GLU_INVALID_ENUM);
}
}
/* sequence of adjacent Bezier patches */
static GLenum
convert_surfs(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl)
{
knot_str_type geom_s_knot,color_s_knot,normal_s_knot,texture_s_knot;
knot_str_type geom_t_knot,color_t_knot,normal_t_knot,texture_t_knot;
GLenum err;
if((err=fill_knot_structures(nobj,&geom_s_knot,&geom_t_knot,
&color_s_knot,&color_t_knot,&normal_s_knot,&normal_t_knot,
&texture_s_knot,&texture_t_knot)) !=GLU_NO_ERROR)
{
return err;
}
/* unify knots - all knots should have the same working range */
if((err=select_knot_working_range(nobj,&geom_s_knot,&color_s_knot,
&normal_s_knot,&texture_s_knot)) !=GLU_NO_ERROR)
{
call_user_error(nobj,err);
return err;
}
if((err=select_knot_working_range(nobj,&geom_t_knot,&color_t_knot,
&normal_t_knot,&texture_t_knot)) !=GLU_NO_ERROR)
{
free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
&texture_s_knot);
call_user_error(nobj,err);
return err;
}
/* convert the geometry surface */
nobj->surface.geom.dim=get_surface_dim(nobj->surface.geom.type);
if((err=convert_surf(&geom_s_knot,&geom_t_knot,&(nobj->surface.geom),
&(new_ctrl->geom_ctrl),&(new_ctrl->geom_s_pt_cnt),
&(new_ctrl->geom_t_pt_cnt)))!=GLU_NO_ERROR)
{
free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
&texture_s_knot);
free_unified_knots(&geom_t_knot,&color_t_knot,&normal_t_knot,
&texture_t_knot);
call_user_error(nobj,err);
return err;
}
/* if additional attributive surfaces are given convert them as well */
if(color_s_knot.unified_knot)
{
nobj->surface.color.dim=get_surface_dim(nobj->surface.color.type);
if((err=convert_surf(&color_s_knot,&color_t_knot,&(nobj->surface.color),
&(new_ctrl->color_ctrl),&(new_ctrl->color_s_pt_cnt),
&(new_ctrl->color_t_pt_cnt)))!=GLU_NO_ERROR)
{
free_unified_knots(&color_s_knot,&color_s_knot,&normal_s_knot,
&texture_s_knot);
free_unified_knots(&color_t_knot,&color_t_knot,&normal_t_knot,
&texture_t_knot);
free_new_ctrl(new_ctrl);
call_user_error(nobj,err);
return err;
}
}
if(normal_s_knot.unified_knot)
{
nobj->surface.normal.dim=get_surface_dim(nobj->surface.normal.type);
if((err=convert_surf(&normal_s_knot,&normal_t_knot,
&(nobj->surface.normal),
&(new_ctrl->normal_ctrl),&(new_ctrl->normal_s_pt_cnt),
&(new_ctrl->normal_t_pt_cnt)))!=GLU_NO_ERROR)
{
free_unified_knots(&normal_s_knot,&normal_s_knot,&normal_s_knot,
&texture_s_knot);
free_unified_knots(&normal_t_knot,&normal_t_knot,&normal_t_knot,
&texture_t_knot);
free_new_ctrl(new_ctrl);
call_user_error(nobj,err);
return err;
}
}
if(texture_s_knot.unified_knot)
{
nobj->surface.texture.dim=get_surface_dim(nobj->surface.texture.type);
if((err=convert_surf(&texture_s_knot,&texture_t_knot,
&(nobj->surface.texture),
&(new_ctrl->texture_ctrl),&(new_ctrl->texture_s_pt_cnt),
&(new_ctrl->texture_t_pt_cnt)))!=GLU_NO_ERROR)
{
free_unified_knots(&texture_s_knot,&texture_s_knot,&texture_s_knot,
&texture_s_knot);
free_unified_knots(&texture_t_knot,&texture_t_knot,&texture_t_knot,
&texture_t_knot);
free_new_ctrl(new_ctrl);
call_user_error(nobj,err);
return err;
}
}
return GLU_NO_ERROR;
}
/* prepare the knot information structures */
static GLenum
fill_knot_structures(GLUnurbsObj *nobj,
knot_str_type *geom_s_knot, knot_str_type *geom_t_knot,
knot_str_type *color_s_knot, knot_str_type *color_t_knot,
knot_str_type *normal_s_knot, knot_str_type *normal_t_knot,
knot_str_type *texture_s_knot, knot_str_type *texture_t_knot)
{
GLint order;
GLfloat *knot;
GLint nknots;
GLint t_min,t_max;
geom_s_knot->unified_knot=NULL;
knot=geom_s_knot->knot=nobj->surface.geom.sknot;
nknots=geom_s_knot->nknots=nobj->surface.geom.sknot_count;
order=geom_s_knot->order=nobj->surface.geom.sorder;
geom_s_knot->delta_nknots=0;
t_min=geom_s_knot->t_min=order-1;
t_max=geom_s_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
geom_s_knot->open_at_begin=GL_TRUE;
}
else
geom_s_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
geom_s_knot->open_at_end=GL_TRUE;
}
else
geom_s_knot->open_at_end=GL_FALSE;
geom_t_knot->unified_knot=NULL;
knot=geom_t_knot->knot=nobj->surface.geom.tknot;
nknots=geom_t_knot->nknots=nobj->surface.geom.tknot_count;
order=geom_t_knot->order=nobj->surface.geom.torder;
geom_t_knot->delta_nknots=0;
t_min=geom_t_knot->t_min=order-1;
t_max=geom_t_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
geom_t_knot->open_at_begin=GL_TRUE;
}
else
geom_t_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
geom_t_knot->open_at_end=GL_TRUE;
}
else
geom_t_knot->open_at_end=GL_FALSE;
if(nobj->surface.color.type!=GLU_INVALID_ENUM)
{
color_s_knot->unified_knot=(GLfloat *)1;
knot=color_s_knot->knot=nobj->surface.color.sknot;
nknots=color_s_knot->nknots=nobj->surface.color.sknot_count;
order=color_s_knot->order=nobj->surface.color.sorder;
color_s_knot->delta_nknots=0;
t_min=color_s_knot->t_min=order-1;
t_max=color_s_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
color_s_knot->open_at_begin=GL_TRUE;
}
else
color_s_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
color_s_knot->open_at_end=GL_TRUE;
}
else
color_s_knot->open_at_end=GL_FALSE;
color_t_knot->unified_knot=(GLfloat *)1;
knot=color_t_knot->knot=nobj->surface.color.tknot;
nknots=color_t_knot->nknots=nobj->surface.color.tknot_count;
order=color_t_knot->order=nobj->surface.color.torder;
color_t_knot->delta_nknots=0;
t_min=color_t_knot->t_min=order-1;
t_max=color_t_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
color_t_knot->open_at_begin=GL_TRUE;
}
else
color_t_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
color_t_knot->open_at_end=GL_TRUE;
}
else
color_t_knot->open_at_end=GL_FALSE;
}
else
{
color_s_knot->unified_knot=NULL;
color_t_knot->unified_knot=NULL;
}
if(nobj->surface.normal.type!=GLU_INVALID_ENUM)
{
normal_s_knot->unified_knot=(GLfloat *)1;
knot=normal_s_knot->knot=nobj->surface.normal.sknot;
nknots=normal_s_knot->nknots=nobj->surface.normal.sknot_count;
order=normal_s_knot->order=nobj->surface.normal.sorder;
normal_s_knot->delta_nknots=0;
t_min=normal_s_knot->t_min=order-1;
t_max=normal_s_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
normal_s_knot->open_at_begin=GL_TRUE;
}
else
normal_s_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
normal_s_knot->open_at_end=GL_TRUE;
}
else
normal_s_knot->open_at_end=GL_FALSE;
normal_t_knot->unified_knot=(GLfloat *)1;
knot=normal_t_knot->knot=nobj->surface.normal.tknot;
nknots=normal_t_knot->nknots=nobj->surface.normal.tknot_count;
order=normal_t_knot->order=nobj->surface.normal.torder;
normal_t_knot->delta_nknots=0;
t_min=normal_t_knot->t_min=order-1;
t_max=normal_t_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
normal_t_knot->open_at_begin=GL_TRUE;
}
else
normal_t_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
normal_t_knot->open_at_end=GL_TRUE;
}
else
normal_t_knot->open_at_end=GL_FALSE;
}
else
{
normal_s_knot->unified_knot=NULL;
normal_t_knot->unified_knot=NULL;
}
if(nobj->surface.texture.type!=GLU_INVALID_ENUM)
{
texture_s_knot->unified_knot=(GLfloat *)1;
knot=texture_s_knot->knot=nobj->surface.texture.sknot;
nknots=texture_s_knot->nknots=nobj->surface.texture.sknot_count;
order=texture_s_knot->order=nobj->surface.texture.sorder;
texture_s_knot->delta_nknots=0;
t_min=texture_s_knot->t_min=order-1;
t_max=texture_s_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
texture_s_knot->open_at_begin=GL_TRUE;
}
else
texture_s_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
texture_s_knot->open_at_end=GL_TRUE;
}
else
texture_s_knot->open_at_end=GL_FALSE;
texture_t_knot->unified_knot=(GLfloat *)1;
knot=texture_t_knot->knot=nobj->surface.texture.tknot;
nknots=texture_t_knot->nknots=nobj->surface.texture.tknot_count;
order=texture_t_knot->order=nobj->surface.texture.torder;
texture_t_knot->delta_nknots=0;
t_min=texture_t_knot->t_min=order-1;
t_max=texture_t_knot->t_max=nknots-order;
if(fabs(knot[t_min]-knot[t_max])<EPSILON)
{
call_user_error(nobj,GLU_NURBS_ERROR3);
return GLU_ERROR;
}
if(fabs(knot[0]-knot[t_min])<EPSILON)
{
/* knot open at beggining */
texture_t_knot->open_at_begin=GL_TRUE;
}
else
texture_t_knot->open_at_begin=GL_FALSE;
if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
{
/* knot open at end */
texture_t_knot->open_at_end=GL_TRUE;
}
else
texture_t_knot->open_at_end=GL_FALSE;
}
else
{
texture_s_knot->unified_knot=NULL;
texture_t_knot->unified_knot=NULL;
}
return GLU_NO_ERROR;
}
GLenum
augment_new_ctrl(GLUnurbsObj *nobj, new_ctrl_type *p)
{
GLsizei offset_size;
GLint i,j;
p->s_bezier_cnt=(p->geom_s_pt_cnt)/(nobj->surface.geom.sorder);
p->t_bezier_cnt=(p->geom_t_pt_cnt)/(nobj->surface.geom.torder);
offset_size=(p->s_bezier_cnt)*(p->t_bezier_cnt);
p->geom_t_stride=nobj->surface.geom.dim;
p->geom_s_stride=(p->geom_t_pt_cnt)*(nobj->surface.geom.dim);
p->color_t_stride=nobj->surface.color.dim;
p->color_s_stride=(p->color_t_pt_cnt)*(nobj->surface.color.dim);
p->normal_t_stride=nobj->surface.normal.dim;
p->normal_s_stride=(p->normal_t_pt_cnt)*(nobj->surface.normal.dim);
p->texture_t_stride=nobj->surface.texture.dim;
p->texture_s_stride=(p->texture_t_pt_cnt)*(nobj->surface.texture.dim);
if((p->geom_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
{
call_user_error(nobj,GLU_OUT_OF_MEMORY);
return GLU_ERROR;
}
if(p->color_ctrl)
if((p->color_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
{
free_new_ctrl(p);
call_user_error(nobj,GLU_OUT_OF_MEMORY);
return GLU_ERROR;
}
if(p->normal_ctrl)
if((p->normal_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
{
free_new_ctrl(p);
call_user_error(nobj,GLU_OUT_OF_MEMORY);
return GLU_ERROR;
}
if(p->texture_ctrl)
if((p->texture_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
{
free_new_ctrl(p);
call_user_error(nobj,GLU_OUT_OF_MEMORY);
return GLU_ERROR;
}
for(i=0;i<p->s_bezier_cnt;i++)
for(j=0;j<p->t_bezier_cnt;j++)
*(p->geom_offsets + i*(p->t_bezier_cnt) + j) =
p->geom_ctrl + i*(nobj->surface.geom.sorder)*
(nobj->surface.geom.dim)*(p->geom_t_pt_cnt) +
j*(nobj->surface.geom.dim)*(nobj->surface.geom.torder);
if(p->color_ctrl)
for(i=0;i<p->s_bezier_cnt;i++)
for(j=0;j<p->t_bezier_cnt;j++)
*(p->color_offsets + i*(p->t_bezier_cnt) + j) =
p->color_ctrl + i*(nobj->surface.color.sorder)*
(nobj->surface.color.dim)*(p->color_t_pt_cnt) +
j*(nobj->surface.color.dim)*(nobj->surface.color.torder);
if(p->normal_ctrl)
for(i=0;i<p->s_bezier_cnt;i++)
for(j=0;j<p->t_bezier_cnt;j++)
*(p->normal_offsets + i*(p->t_bezier_cnt) + j) =
p->normal_ctrl + i*(nobj->surface.normal.sorder)*
(nobj->surface.normal.dim)*(p->normal_t_pt_cnt) +
j*(nobj->surface.normal.dim)*(nobj->surface.normal.torder);
if(p->texture_ctrl)
for(i=0;i<p->s_bezier_cnt;i++)
for(j=0;j<p->t_bezier_cnt;j++)
*(p->texture_offsets + i*(p->t_bezier_cnt) + j) =
p->texture_ctrl + i*(nobj->surface.texture.sorder)*
(nobj->surface.texture.dim)*(p->texture_t_pt_cnt) +
j*(nobj->surface.texture.dim)*(nobj->surface.texture.torder);
return GLU_NO_ERROR;
}
void GLAPIENTRY
gluNurbsSurface(GLUnurbsObj * nobj,
GLint sknot_count, GLfloat * sknot,
GLint tknot_count, GLfloat * tknot,
GLint s_stride, GLint t_stride,
GLfloat * ctrlarray, GLint sorder, GLint torder, GLenum type)
{
if (nobj->nurbs_type == GLU_NURBS_NO_TRIM
|| nobj->nurbs_type == GLU_NURBS_TRIM
|| nobj->nurbs_type == GLU_NURBS_TRIM_DONE) {
if (type == GL_MAP2_VERTEX_3 || type == GL_MAP2_VERTEX_4) {
call_user_error(nobj, GLU_NURBS_ERROR8);
return;
}
}
else if (nobj->nurbs_type != GLU_NURBS_SURFACE) {
call_user_error(nobj, GLU_NURBS_ERROR11);
return;
}
switch (type) {
case GL_MAP2_VERTEX_3:
case GL_MAP2_VERTEX_4:
nobj->surface.geom.sknot_count = sknot_count;
nobj->surface.geom.sknot = sknot;
nobj->surface.geom.tknot_count = tknot_count;
nobj->surface.geom.tknot = tknot;
nobj->surface.geom.s_stride = s_stride;
nobj->surface.geom.t_stride = t_stride;
nobj->surface.geom.ctrlarray = ctrlarray;
nobj->surface.geom.sorder = sorder;
nobj->surface.geom.torder = torder;
nobj->surface.geom.type = type;
nobj->nurbs_type = GLU_NURBS_NO_TRIM;
break;
case GL_MAP2_INDEX:
case GL_MAP2_COLOR_4:
nobj->surface.color.sknot_count = sknot_count;
nobj->surface.color.sknot = sknot;
nobj->surface.color.tknot_count = tknot_count;
nobj->surface.color.tknot = tknot;
nobj->surface.color.s_stride = s_stride;
nobj->surface.color.t_stride = t_stride;
nobj->surface.color.ctrlarray = ctrlarray;
nobj->surface.color.sorder = sorder;
nobj->surface.color.torder = torder;
nobj->surface.color.type = type;
break;
case GL_MAP2_NORMAL:
nobj->surface.normal.sknot_count = sknot_count;
nobj->surface.normal.sknot = sknot;
nobj->surface.normal.tknot_count = tknot_count;
nobj->surface.normal.tknot = tknot;
nobj->surface.normal.s_stride = s_stride;
nobj->surface.normal.t_stride = t_stride;
nobj->surface.normal.ctrlarray = ctrlarray;
nobj->surface.normal.sorder = sorder;
nobj->surface.normal.torder = torder;
nobj->surface.normal.type = type;
break;
case GL_MAP2_TEXTURE_COORD_1:
case GL_MAP2_TEXTURE_COORD_2:
case GL_MAP2_TEXTURE_COORD_3:
case GL_MAP2_TEXTURE_COORD_4:
nobj->surface.texture.sknot_count = sknot_count;
nobj->surface.texture.sknot = sknot;
nobj->surface.texture.tknot_count = tknot_count;
nobj->surface.texture.tknot = tknot;
nobj->surface.texture.s_stride = s_stride;
nobj->surface.texture.t_stride = t_stride;
nobj->surface.texture.ctrlarray = ctrlarray;
nobj->surface.texture.sorder = sorder;
nobj->surface.texture.torder = torder;
nobj->surface.texture.type = type;
break;
default:
call_user_error(nobj, GLU_INVALID_ENUM);
}
}
void GLAPIENTRY
gluNurbsCurve(GLUnurbsObj * nobj, GLint nknots, GLfloat * knot,
GLint stride, GLfloat * ctlarray, GLint order, GLenum type)
{
if (nobj->nurbs_type == GLU_NURBS_TRIM) {
#if 0
/* TODO: NOT IMPLEMENTED YET */
nurbs_trim *ptr1;
trim_list *ptr2;
if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
call_user_error(nobj, GLU_NURBS_ERROR14);
return;
}
for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
if (ptr1->trim_loop) {
for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
call_user_error(nobj, GLU_OUT_OF_MEMORY);
return;
}
ptr2 = ptr2->next;
}
else {
if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
call_user_error(nobj, GLU_OUT_OF_MEMORY);
return;
}
ptr1->trim_loop = ptr2;
}
ptr2->trim_type = GLU_TRIM_NURBS;
ptr2->curve.nurbs_curve.knot_count = nknots;
ptr2->curve.nurbs_curve.knot = knot;
ptr2->curve.nurbs_curve.stride = stride;
ptr2->curve.nurbs_curve.ctrlarray = ctlarray;
ptr2->curve.nurbs_curve.order = order;
ptr2->curve.nurbs_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
ptr2->curve.nurbs_curve.type = type;
ptr2->next = NULL;
#endif
}
else {
if (type == GLU_MAP1_TRIM_2 || type == GLU_MAP1_TRIM_3) {
call_user_error(nobj, GLU_NURBS_ERROR22);
return;
}
if (nobj->nurbs_type != GLU_NURBS_CURVE) {
call_user_error(nobj, GLU_NURBS_ERROR10);
return;
}
switch (type) {
case GL_MAP1_VERTEX_3:
case GL_MAP1_VERTEX_4:
if (nobj->curve.geom.type != GLU_INVALID_ENUM) {
call_user_error(nobj, GLU_NURBS_ERROR8);
return;
}
nobj->curve.geom.type = type;
nobj->curve.geom.knot_count = nknots;
nobj->curve.geom.knot = knot;
nobj->curve.geom.stride = stride;
nobj->curve.geom.ctrlarray = ctlarray;
nobj->curve.geom.order = order;
break;
case GL_MAP1_INDEX:
case GL_MAP1_COLOR_4:
nobj->curve.color.type = type;
nobj->curve.color.knot_count = nknots;
nobj->curve.color.knot = knot;
nobj->curve.color.stride = stride;
nobj->curve.color.ctrlarray = ctlarray;
nobj->curve.color.order = order;
break;
case GL_MAP1_NORMAL:
nobj->curve.normal.type = type;
nobj->curve.normal.knot_count = nknots;
nobj->curve.normal.knot = knot;
nobj->curve.normal.stride = stride;
nobj->curve.normal.ctrlarray = ctlarray;
nobj->curve.normal.order = order;
break;
case GL_MAP1_TEXTURE_COORD_1:
case GL_MAP1_TEXTURE_COORD_2:
case GL_MAP1_TEXTURE_COORD_3:
case GL_MAP1_TEXTURE_COORD_4:
nobj->curve.texture.type = type;
nobj->curve.texture.knot_count = nknots;
nobj->curve.texture.knot = knot;
nobj->curve.texture.stride = stride;
nobj->curve.texture.ctrlarray = ctlarray;
nobj->curve.texture.order = order;
break;
default:
call_user_error(nobj, GLU_INVALID_ENUM);
}
}
}
void GLAPIENTRY
gluNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat value)
{
GLenum val;
switch (property) {
case GLU_SAMPLING_TOLERANCE:
if (value <= 0.0) {
call_user_error(nobj, GLU_INVALID_VALUE);
return;
}
nobj->sampling_tolerance = value;
break;
case GLU_PARAMETRIC_TOLERANCE:
if (value <= 0.0) {
call_user_error(nobj, GLU_INVALID_VALUE);
return;
}
nobj->parametric_tolerance = value;
break;
case GLU_U_STEP:
if (value <= 0.0) {
call_user_error(nobj, GLU_INVALID_VALUE);
return;
}
nobj->u_step = (GLint) value;
break;
case GLU_V_STEP:
if (value <= 0.0) {
call_user_error(nobj, GLU_INVALID_VALUE);
return;
}
nobj->v_step = (GLint) value;
break;
case GLU_SAMPLING_METHOD:
val = (GLenum) value;
if (val != GLU_PATH_LENGTH && val != GLU_PARAMETRIC_ERROR
&& val != GLU_DOMAIN_DISTANCE) {
call_user_error(nobj, GLU_INVALID_ENUM);
return;
}
nobj->sampling_method = val;
break;
case GLU_DISPLAY_MODE:
val = (GLenum) value;
if (val != GLU_FILL && val != GLU_OUTLINE_POLYGON
&& val != GLU_OUTLINE_PATCH) {
call_user_error(nobj, GLU_INVALID_ENUM);
return;
}
if (nobj->nurbs_type == GLU_NURBS_CURVE) {
call_user_error(nobj, GLU_NURBS_ERROR26);
return;
}
nobj->display_mode = val;
if (val == GLU_OUTLINE_PATCH)
fprintf(stderr,
"NURBS, for the moment, can display only in POLYGON mode\n");
break;
case GLU_CULLING:
val = (GLenum) value;
if (val != GL_TRUE && val != GL_FALSE) {
call_user_error(nobj, GLU_INVALID_ENUM);
return;
}
nobj->culling = (GLboolean) value;
break;
case GLU_AUTO_LOAD_MATRIX:
val = (GLenum) value;
if (val != GL_TRUE && val != GL_FALSE) {
call_user_error(nobj, GLU_INVALID_ENUM);
return;
}
nobj->auto_load_matrix = (GLboolean) value;
break;
default:
call_user_error(nobj, GLU_NURBS_ERROR26);
}
}
