シェルスクリプトがテキストファイルを1行ずつ処理する方法

void APIENTRY glPolygonOffset (GLfloat factor, GLfloat units);

#include"freeglut.h"
#include<math.h>

GLfloat angle=0.0f;

void myDisplay()
{
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);	

	glPushMatrix();	
	glDisable(GL_POLYGON_OFFSET_FILL);
	glRotatef(angle,0,1,0);

	glColor3f(1,0,0);
	glRectf(-1.5,-1.5,0.5,0.5);
	glEnable(GL_POLYGON_OFFSET_FILL);
	glPolygonOffset(-1.0,-1.0);

	glColor3f(0,1,0);
	glRectf(-0.5,-0.5,1.5,1.5);
	glPolygonOffset(-2.0f,-2.0f);

	glColor3f(0,0,1);
	glLineWidth(3);
	glBegin(GL_TRIANGLES);
	glVertex3f(-1.5,-1.5,0);
	glVertex3f(-1.5,-0.5,0);
	glVertex3f(0.5,0.5,0);
	glEnd();

	glPopMatrix();
	glutSwapBuffers();
}

void Init()
{
	glEnable(GL_DEPTH_TEST);
	glClearColor(1,1,1,1);

	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(70,1,1,20);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	gluLookAt(0,0,3,0,0,0,0,0,1,0);
}

void SpecialKey(GLint key,GLint x,GLint y)
{
	if(key==GLUT_KEY_UP||key==GLUT_KEY_LEFT)
	{
		angle-=0.8f;
	}
	if(key==GLUT_KEY_DOWN||key==GLUT_KEY_RIGHT)
	{
		angle+=0.8f;
	}
	myDisplay();
}

int main(int argc, char *argv[])      
{      
	glutInit(&argc, argv); //initialize GLUT  
	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);    
	glutInitWindowPosition(500, 200);      
	glutInitWindowSize(400, 400);      
	glutCreateWindow("OpenGL");   
	Init();   
	glutDisplayFunc(&myDisplay); //callback function   
	glutSpecialFunc(&SpecialKey);
	glutMainLoop(); //continuous display, when the window changes will redraw the graphics  
	return 0;      
}   

for line in $(cat data.dat)
do
 echo "File:${line}"
done

for line in `cat data.dat`
do
 echo "File:${line}"
done