xin.rar_室内 射线_室内射线跟踪_室内射线追踪_射线_射线跟踪

#include<stdio.h> #include<stdlib.h> #include<math.h> #include<time.h> typedef struct { double x; double y; }pointlink; pointlink*reverse_link(piontlink *head) { pointlink *prev=NULL,*next=NULL; while(head) {next=head->nextpoint; head->nextpoint=prev; prev=head; head=next; } return prev; } typedef struct plink { int pointnun; int no; int flag; pointlink *ploygon; double max_min[4]; struct plink *nextploygon; }ploygolink; double cossproduct(vertexlist *a,vertexlist *b) { double d; d=(a.x*b->x)+(a->y*b->y); return(d); } double dotproduct(vertexlist *a,vertexlist *b) { double d; d=(a->x*b->x)+(a->y*b->y); return d; } ploygonlink *read_all_plonygon(double *max_x,double *min_x,double *max_y,double*min_y) { pointlink *p=0,*q=0; ploygonlink *ploy=0,*plonygohead=0; int i=0;j=0; char code2[12]; FILE *f; double code1,code3,code4; *max_x=-9999999999.0; *min_x= 9999999999.0; *max_y=-9999999999.0; *min_y= 9999999999.0; f=fopen("1.text","r"); if(!f) {printf("打开文件出错\n可能不存在此文件。\n"); printf("按任意键退出....."); getch(); exit(0); } fscanf(f,"%lf%s%lf\n",&code1,code2,&code3); while(!feof(f)) { ploy=(ployonlink*)malloc(sizeof(ployonlink)); if(!ploy) {printf("内存不够!!"); exit(0); } } }