Week 16

 Week 16

1.复习上周

改为float[20]=0;新增floatID=0;

2.新增Keyboard函式

#include <stdio.h>

#include <GL/glut.h>

float angle[20]={},diff=2;

int angleID=0;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    angle[angleID]+=diff;

    if(angle[angleID]>90) diff=-2;

    if(angle[angleID]<0) diff=+2;

    glutPostRedisplay();

}

void keyboard(unsigned char key,int x,int y)

{

    if(key=='0') angleID=0;

    if(key=='1') angleID=1;

    if(key=='2') angleID=2;

    if(key=='3') angleID=3;

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glutSolidTeapot(0.3);

        glPushMatrix();

            glTranslatef(-0.3,0,0);

            glRotatef(angle[0],0,0,1);

            glTranslatef(-0.3,0,0);

            glutSolidTeapot(0.3);

            glPushMatrix();

                glTranslatef(-0.3,0,0);

                glRotatef(angle[1],0,0,1);

                glTranslatef(-0.3,0,0);

                glutSolidTeapot(0.3);

            glPopMatrix();

        glPopMatrix();

        glPushMatrix();

            glTranslatef(0.3,0,0);

            glRotatef(-angle[2],0,0,1);

            glTranslatef(0.3,0,0);

            glutSolidTeapot(0.3);

            glPushMatrix();

                glTranslatef(0.3,0,0);

                glRotatef(-angle[3],0,0,1);

                glTranslatef(0.3,0,0);

                glutSolidTeapot(0.3);

            glPopMatrix();

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc,char ** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week16");

    glutKeyboardFunc(keyboard);

 

    glutDisplayFunc(display);

    glutTimerFunc(0,timer,0);

    glutMainLoop();

}

3.新增mouse,motion函式

int oldX=0,oldY=0;

void mouse(int button,int state,int x,int y)

{

    oldX=x;

    oldY=y;

}

void motion(int x,int y)

{

    angle[angleID]+= x-oldX;

    oldX=x;

    glutPostRedisplay();

}

3.1.加在main里

glutMouseFunc(mouse);

glutMotionFunc(motion);

4.1.加入存档

FILE*fout=NULL;

void keyboard(unsigned char key,int x,int y)

{

    if(key=='0') angleID=0;

    if(key=='1') angleID=1;

    if(key=='2') angleID=2;

    if(key=='3') angleID=3;

    if(key=='s'){

        if(fout==NULL) fout=fopen("angle.txt","w+");

        for(int i=0;i<20;i++) printf("%.2f",angle[i]);

        printf("\n");

        for(int i=0;i<20;i++) fprintf(fout,"%.2f",angle[i]);

        fprintf(fout,"\n");

    }

}

4.2.加入读档

FILE*fin=NULL;

if(key=='r'){

        if(fin==NULL) fin=fopen("angle.txt","r");

        for(int i=0;i<20;i++) fscanf(fin,"%f",&angle[i]);

        glutPostRedisplay();

}

5.修改专案档位置

6.随时读档(将fprintf修改到motion里)

void motion(int x,int y)

{

    angle[angleID]+= x-oldX;

    oldX=x;

    glutPostRedisplay();

 

    if(fout==NULL) fout=fopen("angle.txt","w+");

    for(int i=0;i<20;i++) printf("%.2f",angle[i]);

    printf("\n");

    for(int i=0;i<20;i++) fprintf(fout,"%.2f",angle[i]);

    fprintf(fout,"\n");

}