week13

1.利用程式output到桌面

2.

#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()///以下是老師提供的

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glutSolidTeapot(0.3);///正中間,當成身體的茶壼

        glPushMatrix();

            glTranslatef(0.4, 0,0);///掛上去

            glRotatef(angle, 0,0,1);///

            glTranslatef(0.4, 0,0);///把柄放中間

            glutSolidTeapot(0.3);///右邊,當成手臂的茶壼

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

///上面是我們增加的程式碼

///打光的部分留著 (陣列,main() ) 其他都刪掉

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;

}

3.加上可以讀

#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();

}

void display()///以下是老師提供的

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glutSolidTeapot(0.3);///正中間,當成身體的茶壼

        glPushMatrix();

            glTranslatef(0.4, 0,0);///掛上去

            glRotatef(angle, 0,0,1);///

            glTranslatef(0.4, 0,0);///把柄放中間

            glutSolidTeapot(0.3);///右邊,當成手臂的茶壼

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

///上面是我們增加的程式碼

///打光的部分留著 (陣列,main() ) 其他都刪掉

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);

    glutKeyboardFunc(keyboard);

    ///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;

}