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函数说明：
如果UF_MODL_ask_uv_points_containment将被多次调用了同一张脸然后该功能，在与UF_MODL_unset_containment一起，将改善的计算的性能。之前调用此函数您的来电来UF_MODL_ask_uv_points_containment

函数参数：
第1个参数为输入：
face_eid代表参数变量，tag_t 为输入参数类型，面，这将在多个UF_MODL_ask_uv_points_containment调用中使用

UF_MODL_set_containment函数实例代码演示：
HEAD UFD_ASK_UVPOINT_CONTAINMENT CCC UFUNCLASS UFCUST说明：此文件包含以下外部函数支持问点遏制：UF_MODL_ask_point_containment删除标记括起来的@@文本将被删除版本日期名称说明更改中对于UF_MODL_ask_uv_points_containment0017Jan12斯图尔特·史密斯新的示例程序$$历史删除标记中包含的文字将被删除@@
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#include <stdio.h>
#include <uf.h>
#include <uf_part.h>
#include <uf_defs.h>
#include <uf_modl.h>
#include <uf_evalsf.h>
#include <uf_ui.h>

#define UF_CALL(X) (report( __FILE__, __LINE__, #X, (X)))

static int report( char *file, int line, char *call, int irc)
{
if (irc)
{
char messg[133];
printf("%s, line %d: %s\n", file, line, call);
(UF_get_fail_message(irc, messg)) ?
printf(" returned a %d\n", irc) :
printf(" returned error %d: %s\n", irc, messg);
}
return(irc);
}

static void do_ugopen_api(void)
{

char *edge_length[3] = {"5.0", "5.0", "5.0"};
const char *prtnam = "ask_uvpoint_containment";

double origin[3] = {0.0, 0.0, 0.0};

tag_t face_tag;
tag_t feat_tag;
tag_t part_tag;

uf_list_p_t face_list;

UF_EVALSF_p_t face_evaluator;
int set_length = 10 ;
double uvbox[4],*u_params,*v_params;
int i,j=0,*points_containment,error_code;

UF_FEATURE_SIGN create = UF_NULLSIGN;

/*
Open a new part
*/
UF_CALL( UF_PART_new(prtnam, METRIC, &part_tag) );

/*
Create a block of dimensions 5, 5, 5
*/
UF_CALL(UF_MODL_create_block1(create, origin, edge_length, &feat_tag));
UF_CALL(UF_MODL_ask_feat_faces(feat_tag, &face_list));
UF_CALL(UF_MODL_ask_list_item(face_list,1,&face_tag));

/*
Get the uv parameter box for the face.
*/
UF_CALL(UF_EVALSF_initialize(face_tag,&face_evaluator));
UF_CALL(UF_EVALSF_ask_face_uv_minmax(face_evaluator,uvbox));
UF_CALL(UF_EVALSF_free(&face_evaluator));

/* fill up array of u and v parameters to search*/
u_params = (double *)UF_allocate_memory(set_length*sizeof(double),&error_code);
v_params = (double *)UF_allocate_memory(set_length*sizeof(double),&error_code);
points_containment = (int *)UF_allocate_memory(set_length*sizeof(int),&error_code);

u_params[0] = uvbox[0] ;
v_params[0] = uvbox[2] ;
for (j = 1; j < set_length; j++)
{
u_params[j] = u_params[j-1] + ((uvbox[1] - uvbox[0])/(set_length - 1.0)) ;
v_params[j] = v_params[j-1] + ((uvbox[3] - uvbox[2])/(set_length - 1.0)) ;
}

/*
We are going to make multiple calls to the ask containment function - we get faster results
if we initalize this face for that operation.
*/
UF_CALL(UF_MODL_set_containment(face_tag) ) ;

/*
Make the containment calls.
*/
for (i = 0; i < set_length; i++)
{
/*
Ask for containment
*/
UF_CALL(UF_MODL_ask_uv_points_containment(1,&u_params[i],&v_params[i],face_tag,points_containment)) ;
}

/*
Done with the memory used in containment checks - free it.
*/
UF_free(u_params);
UF_free(v_params);
UF_free(points_containment);

/*
Done with this face, free the data generated to improve processing speed.
*/
UF_CALL(UF_MODL_unset_containment(face_tag) ) ;

return;
}

/*ARGSUSED*/
void ufusr(char *param, int *retcode, int param_len)
{
if (!UF_CALL(UF_initialize()))
{
do_ugopen_api();
UF_CALL(UF_terminate());
}
}

int ufusr_ask_unload(void)
{
return (UF_UNLOAD_IMMEDIATELY);
}

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