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#include <stdio.h>
#include <stdlib.h>
#include "fssimplewindow.h"
int ParseString(int &nWord,int wordTop[],int wordLength[],char str[],int maxNumWords)
{
int i,state;
state=0;
nWord=0;
for(i=0; str[i]!=0; i++)
{
switch(state)
{
case 0:
if(str[i]!=' ' &&
str[i]!='\t' &&
str[i]!=',')
{
state=1;
wordTop[nWord]=i;
wordLength[nWord]=1;
nWord++;
}
break;
case 1:
if(str[i]!=' ' &&
str[i]!='\t' &&
str[i]!=',')
{
wordLength[nWord-1]++;
}
else
{
state=0;
if(nWord==maxNumWords)
{
goto LOOPOUT;
}
}
break;
}
}
LOOPOUT:
return nWord;
}
class Vec
{
public:
int x1,y1,x2,y2;
int r,g,b;
};
class Polyg
{
protected:
int nVertex;
Vec *vertex;
public:
Polyg();
~Polyg();
void ReadFromFile(char fn[]);
void Clear();
void DrawWireframe();
void Move();
};
void Polyg::Clear()
{
if(vertex!=NULL)
{
delete [] vertex; //de-allocation
vertex=NULL;
nVertex=0;
}
}
Polyg::Polyg()
{
nVertex=0;
vertex=NULL;
}
Polyg::~Polyg()
{
Clear(); //de-allocation
}
void Polyg::ReadFromFile(char fn[])
{
if(vertex!=NULL)
{
Clear();
}
FILE *fp;
char str[256];
fp=fopen(fn,"r");
if(fp!=NULL && fgets(str,255,fp)!=NULL)
{
int nRead;
nVertex=atoi(str);
vertex=new Vec[nVertex]; //allocation
if(vertex!=NULL)
{
nRead=0;
while(fgets(str,255,fp)!=NULL && nRead<nVertex)
{
int nWord,wordTop[16],wordLength[16];
ParseString(nWord,wordTop,wordLength,str,16);
if(nWord>=2)
{
vertex[nRead].x1=atoi(str+wordTop[0]);
vertex[nRead].y1=atoi(str+wordTop[1]);
vertex[nRead].x2=atoi(str+wordTop[2]);
vertex[nRead].y2=atoi(str+wordTop[3]);
vertex[nRead].r=atoi(str+wordTop[4]);
vertex[nRead].g=atoi(str+wordTop[5]);
vertex[nRead].b=atoi(str+wordTop[6]);
nRead++;
}
}
fclose(fp);
}
}
if(fp!=NULL)
{
fclose(fp);
}
}
void Polyg::DrawWireframe()
{
for(int i=0; i<nVertex; i++)
{
glColor3ub(vertex[i].r,vertex[i].g,vertex[i].b);
glBegin(GL_LINES);
glVertex2i(vertex[i].x1,600-vertex[i].y1);
glVertex2i(vertex[i].x2,600-vertex[i].y2);
glEnd();
}
}
void Polyg::Move()
{
int lb,mb,rb,mx,my;
int mx0,my0;
int evt=FsGetMouseEvent(lb,mb,rb,mx,my);
if (evt==FSMOUSEEVENT_LBUTTONDOWN)
{
mx0=mx; //seems the assignment fails
my0=my; //seems the assignment fails
}
for(int i=0; i<nVertex; i++)
{
if(0!=lb) // (FSMOUSEEVENT_LBUTTONDOWN==evt)
{
vertex[i].x1=vertex[i].x1+(mx-mx0);
vertex[i].y1=vertex[i].y1+(my-my0);
vertex[i].x2=vertex[i].x2+(mx-mx0);
vertex[i].y2=vertex[i].y2+(my-my0);
}
}
}
int main(void)
{
Polyg plg;
char fn[256];
printf("Enter input file name>");
gets(fn);
plg.ReadFromFile(fn);
FsOpenWindow(16,16,800,600,1);
while(FSKEY_ESC!=FsInkey())
{
glClear(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT);
plg.Move();
plg.DrawWireframe();
FsPollDevice();
if (FSKEY_SPACE==FsInkey())
{
plg.ReadFromFile(fn);
}
FsSwapBuffers();
FsSleep(10);
}
return 0;
}
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