Kuo's Graphic_Note_Week15

 Step 1 : Using CodeBlocks to make Joints of Model Rotated.

    1-1. Coding

    1-2. Build & Run

Final Code:

#include <GL/glut.h>

#include <stdio.h>

float angle[20],oldX=0;

int angleID=0;

FILE*fout=NULL,*fin=NULL;

void myWrite(){

    if(fin!=NULL){

        fclose(fin);

        fin=NULL;

    }

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

    for(int i=0;i<20;i++){

        printf("%.2f ",angle[i]);

        fprintf(fout,"%.2f ",angle[i]);

    }

    printf("\n");

    fprintf(fout,"\n");

}

void myRead(){

    if(fout!=NULL){

        fclose(fout);

        fout=NULL;

    }

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

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

    glutPostRedisplay();

}

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

    if(key=='r')myRead();

    if(key=='s')myWrite();

    if(key=='0')angleID=0;

    if(key=='1')angleID=1;

    if(key=='2')angleID=2;

    if(key=='3')angleID=3;

}

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

    oldX=x;

}

void motion(int x,int y){

    angle[angleID]+=(x-oldX);

    //myWrite();

    oldX=x;

    glutPostRedisplay();

}

void display(){

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glColor3f(1,1,1);///white

    glRectf(0.3, 0.5, -0.3, -0.2);///body

    glPushMatrix();

        glTranslatef(0.3,0.5,0);///hanging on (0.5,0.5)

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

        glTranslatef(-0.3,-0.4,0);///Translate Rotating point to O(0,0)

        glColor3f(1,0,0);///red arms

        glRectf(0.3,0.5,0.8,0.3);///arms

        glPushMatrix();

            glTranslatef(0.8,0.4,0);

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

            glTranslatef(-0.8,-0.4,0);

            glColor3f(0,1,0);///green

            glRectf(0.8,0.5,1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glPushMatrix();

        glTranslatef(-0.3,0.5,0);///hanging on (0.5,0.5)

        glRotatef(angle[2],0,0,1);///Rotate

        glTranslatef(0.3,-0.4,0);///Translate Rotating point to O(0,0)

        glColor3f(1,0,0);///red arms

        glRectf(-0.3,0.5,-0.8,0.3);///arms

        glPushMatrix();

            glTranslatef(-0.8,0.4,0);

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

            glTranslatef(0.8,-0.4,0);

            glColor3f(0,1,0);///green

            glRectf(-0.8,0.5,-1.1,0.3);

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int main(int ac,char**av,char**ev){

    glutInit(&ac,av);

    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH);

    glutInitWindowSize(600,600);

    glutCreateWindow("Week14 TRT");

    glutKeyboardFunc(keyboard);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutDisplayFunc(display);

    glutMainLoop();

}