week 14Jim_c OpenGL

HC-01
LOAD FILE(TXT)

#include <stdio.h>
FILE*fout=NULL,*fin=NULL;
//declare file
int main(int argc,char ** argv)
{
    if(fout==NULL)
        fout=fopen("output.txt","wt");
    fprintf(fout,"Hello World");
}

HC-02
LOAD MOUSE ACTION

#include <GL/glut.h>
#include <stdio.h>
FILE *fout=NULL,*fin=NULL;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glutSolidTeapot(0.3);
    glutSwapBuffers();
}
void motion(int x,int y)
{
    if(fout==NULL)
        fout=fopen("output.txt","w+");
   fprintf(fout,"%d %d\n",x,y);
   
}
int main (int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("3D");
    glutDisplayFunc(display);
    glutMotionFunc(motion);
    glutMainLoop();

}

HC-03

#include <GL/glut.h>
#include <stdio.h>
FILE *fout=NULL,*fin=NULL;
int nowX=150,nowY=150;
 void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glTranslatef((nowX-150)/150.0,-(nowY-150)/150.0,0); 
    glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
void motion(int x,int y)
{
    if(fout==NULL)
        fout=fopen("output.txt","w+");
    fprintf(fout,"%d %d\n",x,y);
}
void keyboard(unsigned char key,int x,int y)
{
    if(key=='r')  

//get key r to input
        {
            if(fin==NULL) fin=fopen("output.txt","r");
            fscanf(fin,"%d %d",&nowX,&nowY);
        }
        glutPostRedisplay();
}
int main (int argc,char **argv)
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
    glutCreateWindow("3D");
    glutDisplayFunc(display);
    glutMotionFunc(motion);
    glutKeyboardFunc(keyboard);
    glutMainLoop();
}

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