Thank you for ur reply…
Yes indices is a global variable
When drawing i see some half drawn 2 circle.
I got vboid as 1.
I am attaching entire coding.
// includes, system
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sys/time.h>
#include <unistd.h>
// includes, GL
#include <GL/glew.h>
#if defined (APPLE) || defined(MACOSX)
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
// includes
#include <rendercheck_gl.h>
///////////////////////////constants///////////////////
#define PRT 3200;
#define RANGECELL 6000;
const unsigned int window_width =700;
const unsigned int window_height =700;
//////////////////User Defined Function////////////////
void MulticastInit();
void circledata();
void display();
void *sweep(void * );
void *video(void *);
int SetTimer(struct timeval &tv, int usec);
int CheckTimer(struct timeval &tv, time_t usec);
void Reverse2Byte(char data[],int number);
//////////////////// GL functionality////////////////////
bool initGL(int argc, char** argv);
void createVBO(GLuint* vboId);
void deleteVBO(GLuint* vboId);
///////////////////// declaration///////////////////
///////////////////GLDeclaration////////////////////
GLuint vboId;
GLuint idcheck;
int threadid;
int sockfd;
struct sockaddr_in address;
struct ip_mreq group;
int len,result;
int reuse=1;
char buffer[200];
pthread_t Receivethread;
struct timeval tv;
int cpivalue=0;
int i;
int indices=0;
float circlevertexarray[5000];
int j=0;
int videodata[3200][6000];
static int prtcounter,rangecellcounter;
struct senddata
{
unsigned short m[10];
}swapeddata;
int count;
////////////////////////circledata////////////////////////////
void circledata()
{
float v1,v2;
for(int no=1;no<6;no++)
{
for(float angle=0;angle<360.0*(3.14/180);angle=angle+0.02)
{
v1=no*0.42*cos(angle);
v2=no*0.42*sin(angle);
circlevertexarray[(j*2)+0]=v1;
circlevertexarray[(j*2)+1]=v2;
j++;
}
}
indices=j+1;
printf("%d
",indices);
}
////////////////////////create VBO///////////////////////////////
void createVBO(GLuint* vboId)
{
// create buffer object
glGenBuffers(1,vboId);
glBindBuffer(GL_ARRAY_BUFFER, vboId);
// initialize buffer object
glBufferData(GL_ARRAY_BUFFER,2indices*sizeof(float),circlevertexarray ,GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#if 1
int bufferSize = 0;
glGetBufferParameteriv(GL_ARRAY_BUFFER, GL_BUFFER_SIZE, &bufferSize);
if(indices != bufferSize)
{
glDeleteBuffersARB(1, vboId);
vboId = 0;
printf("datasize mismatch
");
}
else
{
printf("matching
");
}
#endif
}
/////////////////////////MulticastInit///////////////////////////
void MulticastInit()
{
printf("Hello I am Multicast Init
“);
//Open Socket//
sockfd=socket(AF_INET,SOCK_DGRAM,0);
if(sockfd < 0)
{
perror(“Opening datagram socket error”);
exit(1);
}
else
{
printf(”…Socket Opened Successfully…
");
printf("sockfd=%d
",sockfd);
}
//************Set Socket For reuse********//
if(setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,(char *)&reuse, sizeof(reuse))<0)
{
perror("Reuse Error
“);
}
else
{
printf(”…Reuse Socket Set Successfully…
");
}
address.sin_family=AF_INET;
address.sin_port=htons(2222);
address.sin_addr.s_addr=INADDR_ANY;
len=sizeof(struct sockaddr);
printf("Length=%d
",len);
//**********Connect Socket***********//
if(bind(sockfd, (struct sockaddr *)&address, sizeof(address))<0)
{
printf("Socket Connection Failed
“);
close(sockfd);
exit(1);
}
else
{
printf(”--------Socket Binded-----------
");
}
group.imr_multiaddr.s_addr = inet_addr("225.0.0.1");
group.imr_interface.s_addr = inet_addr("192.168.100.185");
if(setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)&group, sizeof(group)) < 0)
{
perror("Adding multicast group error");
close(sockfd);
exit(1);
}
else
{
printf("----------Adding Multicast group Ok----
");
}
printf("--------Mul check------------
");
}
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
// Program main
////////////////////////////////////////////////////////////////////////////////
int main(int argc, char** argv)
{
initGL(argc, argv);
circledata();
createVBO(&vboId);
MulticastInit();
threadid=pthread_create(&Receivethread,NULL,&sweep,NULL);
glutDisplayFunc(display);
glutMainLoop();
}
////////////////////////////////////////////////////////////////////////////////
//! Initialize GL
////////////////////////////////////////////////////////////////////////////////
bool initGL(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
glutInitWindowSize(window_width, window_height);
glutCreateWindow(“Test”);
glutDisplayFunc(display);
// initialize necessary OpenGL extensions
glewInit();
float aspectratio=window_width/window_height;
// default initialization
glClearColor(0.0, 0.0, 0.0, 1.0);
// viewport
glViewport(0, 0, window_width, window_height);
// projection
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(-3.0,3.0,-3.0/aspectratio,3.0/aspectratio,-200.0,200.0);
// glOrtho(-3.0,3.0,-3.0,3.0,-200.0,200.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
////////////////////////////////////////////////////////////////////////////////
//! Display callback
////////////////////////////////////////////////////////////////////////////////
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
while(1)
{
//usleep(10000);
glClearColor(0.0,0.0,0.0,1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if 1
glColor3f(1.0,1.0,1.0);
glBindBuffer(GL_ARRAY_BUFFER,vboId);
// glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
// glNormalPointer(GL_FLOAT,0,(void*)sizeof(indices));
glVertexPointer(2, GL_FLOAT,0,0);
glDrawArrays(GL_POINTS,0,indices);
glDisableClientState(GL_VERTEX_ARRAY);
// glDisableClientState(GL_NORMAL_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
#endif
#if 0
glColor3f(1.0f,1.0f,1.0f);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glNormalPointer(GL_FLOAT,0,circlevertexarray);
glVertexPointer(2, GL_FLOAT, 0,circlevertexarray );
glDrawArrays(GL_POINTS,0,indices);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glBegin(GL_LINES);
glVertex2f(0.0,0.0);
glVertex2f(0.0,2.1);
glVertex2f(0.0,0.0);
glVertex2f(2.1,0.0);
glVertex2f(0.0,0.0);
glVertex2f(0.0,-2.1);
glVertex2f(0.0,0.0);
glVertex2f(-2.1,0.0);
glEnd();
#endif
#if 0
//circles
glColor3f(1.0,1.0,1.0);
glBegin(GL_POINTS);
for(int i=0;i<6;i++)
{
for(float angle=0;angle<360.0*(3.14/180);angle=angle+0.0157)
{
glVertex2f(i*0.42*cos(angle),i*0.42*sin(angle) );
}
}
glEnd();
//line
glBegin(GL_LINES);
glVertex2f(0.0,0.0);
glVertex2f(0.0,2.1);
glVertex2f(0.0,0.0);
glVertex2f(2.1,0.0);
glVertex2f(0.0,0.0);
glVertex2f(0.0,-2.1);
glVertex2f(0.0,0.0);
glVertex2f(-2.1,0.0);
glEnd();
#endif
///////////////////////
#if 0
glBegin(GL_QUAD_STRIP);
glColor3f(0.0,0.7,0.0);
glVertex2f(0,0);
glVertex2f((5*0.42)*sin((cpivalue*0.0157)),(5*0.42)*cos((cpivalue*0.0157)));
glColor3f(0.0,0.6,0.0);
glVertex2f(0,0);
glVertex2f((5*0.42)*sin(((cpivalue-10)*0.0157)),(5*0.42)*cos(((cpivalue-10)*0.0157)));
glColor3f(0.0,0.5,0.0);
glVertex2f(0,0);
glVertex2f((5*0.42)*sin(((cpivalue-20)*0.0157)),(5*0.42)*cos(((cpivalue-20)*0.0157)));
glColor3f(0.0,0.0,0.0);
glVertex2f(0,0);
glVertex2f((5*0.42)*sin(((cpivalue-30)*0.0157)),(5*0.42)*cos(((cpivalue-30)*0.0157)));
glEnd();
#endif
glutSwapBuffers();
}//while
}//Display Function