graphics.cpp

//
//  graphics.cpp
//  CG_Assignment
//
//  Created by Shikhar  on 26/11/16.
//  Copyright © 2016 Shikhar . All rights reserved.
//

#include "graphics.h"
void func(double *a,double *b,int count){
    FILE *fp = fopen("file.off","w");
    double x[10000];
    double y[10000];
    double z[10000];
    for(int i=0;i<count;i++){
        x[i] = a[i];
        y[i] = b[i];
        z[i]= 0;
    }
    struct face f[1000];
    struct edge e[1000];
    double x1[count],y1[count],z1[count],x2[count],y2[count],z2[count];
    int c_v = count;
    int c_e = 0;
    int c_f = 0;
    for(int i=0;i<count;i++){
        x1[i]=x[i];
        y1[i]=y[i];
        z1[i]=z[i];
    }
    for(int i=0;i<360;i+=10){
        for(int j=0;j<count;j++){
            x2[j] = x1[j]*cos(pi*10/180) + z1[j]*sin(pi*10/180);
            y2[j] = y1[j];
            z2[j] = -x1[j]*sin(pi*10/180) + z1[j]*cos(pi*10/180);
        }
        for(int j=0;j<count-1;j++){
            //e[c_e].next=e[c_v+1];
            //e[c_e].prev=e[c_v+3];
            
            /*e[c_e].x1 = &x[c_v-count+j];
             e[c_e].y1 = &y[c_v-count+j];
             e[c_e].z1 = &z[c_v-count+j];
             
             e[c_e].x2 = &x[c_v-count+j+1];
             e[c_e].y2 = &y[c_v-count+j+1];
             e[c_e].z2 = &z[c_v-count+j+1];
             
             c_e+=1;
             
             //e[c_e].next=e[c_v+1];
             //e[c_e].prev=e[c_v-1];
             
             e[c_e].x1 = &x[c_v-count+j+1];
             e[c_e].y1 = &y[c_v-count+j+1];
             e[c_e].z1 = &z[c_v-count+j+1];
             
             e[c_e].x2 = &x[c_v-count+1];
             e[c_e].y2 = &y[c_v-count+1];
             e[c_e].z2 = &z[c_v-count+1];
             
             c_e+=1;
             
             //e[c_e].next=e[c_v+1];
             //e[c_e].prev=e[c_v-1];
             
             e[c_e].x1 = &x[c_v-count+1];
             e[c_e].y1 = &y[c_v-count+1];
             e[c_e].z1 = &z[c_v-count+1];
             
             e[c_e].x2 = &x[c_v-count];
             e[c_e].y2 = &y[c_v-count];
             e[c_e].z2 = &z[c_v-count];
             
             c_e+=1;
             
             //e[c_e].next=e[c_v-3];
             //e[c_e].prev=e[c_v-1];
             
             e[c_e].x1 = &x[c_v-count];
             e[c_e].y1 = &y[c_v-count];
             e[c_e].z1 = &z[c_v-count];
             
             e[c_e].x2 = &x[c_v-count+j];
             e[c_e].y2 = &y[c_v-count+j];
             e[c_e].z2 = &z[c_v-count+j];
             
             c_e+=1;*/
            
            f[c_f].points[0] = c_v-count+j;
            f[c_f].x1 = &x[c_v-count+j];
            f[c_f].y1 = &y[c_v-count+j];
            f[c_f].z1 = &z[c_v-count+j];
            
            f[c_f].points[1] = c_v-count+j+1;
            f[c_f].x2 = &x[c_v-count+j+1];
            f[c_f].y2 = &y[c_v-count+j+1];
            f[c_f].z2 = &z[c_v-count+j+1];
            
            f[c_f].points[2] = c_v+j+1;
            f[c_f].x3 = &x[c_v+j+1];
            f[c_f].y3 = &y[c_v+j+1];
            f[c_f].z3 = &z[c_v+j+1];
            
            f[c_f].points[3] = c_v+j;
            f[c_f].x4 = &x[c_v+j];
            f[c_f].y4 = &y[c_v+j];
            f[c_f].z4 = &z[c_v+j];
            
            c_f+=1;
        }
        for(int j=0;j<count;j++){
            x[c_v]=x2[j];
            y[c_v]=y2[j];
            z[c_v]=z2[j];
            
            x1[j]=x2[j];
            y1[j]=y2[j];
            z1[j]=z2[j];
            
            c_v+=1;
        }
    }
    
    fprintf(fp,"OFF\n");
    fprintf(fp,"%d %d %d\n",c_v,c_f,c_e);
    for(int i=0;i<c_v;i++){
        fprintf(fp,"%lf %lf %lf\n",x[i],y[i],z[i]);
    }
    for(int i=0;i<c_f;i++){
        fprintf(fp,"4 %d %d %d %d\n",f[i].points[3],f[i].points[2],f[i].points[1],f[i].points[0]);
    }
    printf("File Closed");
    fclose(fp);
}