week13_焦焦焦焦焦焦焦

主題(1) : 寫檔、讀檔

步驟 (A) :

(1) File-New-Empty File (Ctrl-Shift-N)
     另存新檔(File-SaveAs) file.cpp



(2)

#include<stdio.h>
int main()
{
    FILE *  fout=fopen("output.txt", "w+");
    printf("Hello world\n");
   fprintf(fout,"Hello world\n");
}

步驟 (B) :

#include<stdio.h>
float angle=0, angle2=10, angle3=90;
int main()
{
    FILE *  fout=fopen("output.txt", "w+");
   fprintf(fout, "%.3f %.3f %.3f\n", angle, angle2, angle3); 
}

主題(2) : 控制關節

程式碼

#include <GL/glut.h>
#include <stdio.h>
FILE * fout=NULL;
float angle=0;
int oldX=0;
void mouse(int button, int state, int x, int y)
{
    oldX=x;
}
void motion(int x, int y)
{
    angle += x-oldX;
    oldX=x;
    if(fout==NULL){
        fout = fopen("output.txt", "w+");
    }
    fprintf(fout, "%3f\n", angle);
    printf("%.3f\n", angle);
    glutPostRedisplay();
}
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glutSolidTeapot(0.3);
        glPushMatrix();
            glTranslatef(0.4, 0, 0);
            glRotatef(angle, 0, 0, 1);
            glTranslatef(0.4, 0, 0);
            glutSolidTeapot(0.3);
        glPopMatrix();
    glPopMatrix();
    glutSwapBuffers();
}



const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };
const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };

const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };
const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };
const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };
const GLfloat high_shininess[] = { 100.0f };

/* Program entry point */

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutMouseFunc(mouse);
    glutMotionFunc(motion);

    ///glutReshapeFunc(resize);
    glutDisplayFunc(display);
    ///glutKeyboardFunc(key);
    ///glutIdleFunc(idle);

    glClearColor(1,1,1,1);
    ///glEnable(GL_CULL_FACE);
    ///glCullFace(GL_BACK);

    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    glEnable(GL_LIGHT0);
    glEnable(GL_NORMALIZE);
    glEnable(GL_COLOR_MATERIAL);
    glEnable(GL_LIGHTING);

    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
    glLightfv(GL_LIGHT0, GL_POSITION, light_position);

    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);
    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);
    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);
    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);

    glutMainLoop();

    return EXIT_SUCCESS;
}

加入一個mouse

#include <GL/glut.h>
#include <stdio.h>
FILE * fout=NULL;
float angle=0;
int oldX=0;
void mouse(int button, int state, int x, int y)
{
    oldX=x;
}
void motion(int x, int y)
{
    angle += x-oldX;
    oldX=x;
    if(fout==NULL){
        fout = fopen("output.txt", "w+");
    }
    fprintf(fout, "%3f\n", angle);
    printf("%.3f\n", angle);
    glutPostRedisplay();
}

程式碼解說(1) :



程式碼解說(2) :

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutMouseFunc(mouse);
    glutMotionFunc(motion);

    ///glutReshapeFunc(resize);
    glutDisplayFunc(display);
    ///glutKeyboardFunc(key);
    ///glutIdleFunc(idle);

    glClearColor(1,1,1,1);
    ///glEnable(GL_CULL_FACE);
    ///glCullFace(GL_BACK);



執行 :



加入一個keyboard

再加程式碼

#include <GL/glut.h>
#include <stdio.h>
FILE * fout=NULL;
FILE * fin=NULL;
float angle=0;
int oldX=0;
void keyboard(unsigned char key, int x,int y)
{
    if(fin==NULL){
        fin=fopen("output.txt", "r");
    }
    fscanf(fin, "%f", &angle);
    glutPostRedisplay();
}
void mouse(int button, int state, int x, int y)
{
    oldX=x;
}
void motion(int x, int y)
{
    angle += x-oldX;
    oldX=x;
    if(fout==NULL){
        fout = fopen("output.txt", "w+");
    }
    fprintf(fout, "%3f\n", angle);
    printf("%.3f\n", angle);
    glutPostRedisplay();
}

程式碼解說(1) :



程式碼解說(2) :

int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitWindowSize(640,480);
    glutInitWindowPosition(10,10);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("GLUT Shapes");

    glutMouseFunc(mouse);
    glutMotionFunc(motion);
    glutKeyboardFunc(keyboard);

    ///glutReshapeFunc(resize);
    glutDisplayFunc(display);
    ///glutKeyboardFunc(key);
    ///glutIdleFunc(idle);

    glClearColor(1,1,1,1);
    ///glEnable(GL_CULL_FACE);
    ///glCullFace(GL_BACK);