chjyuʕ •ᴥ•ʔ week14 Timer

 1.Timer

• step1

程式碼:

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidSphere(0.3, 30, 30);///實心圓

                            ///半徑         ///橫切

    ///glutWireSphere(0.3, 30, 30);///切線圓

    glutSwapBuffers();

}

int main( int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow(" Week14 timer ");

    glutDisplayFunc(display);

    glutMainLoop();

}

執行結果:

• step2

程式碼:

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    ///glutSolidSphere(0.3, 30, 30);

    glutWireSphere(0.3, 30, 30);

    glutSwapBuffers();

}

void timer(int t){

    glClearColor( 1, 0, 0, 0);

    display();

}

int main( int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow(" Week14 timer ");

    glutDisplayFunc(display);

    glutTimerFunc(3000, timer, 0);

    glutMainLoop();

}

執行結果:

解釋timer函式:

• step3

程式碼:

#include <GL/glut.h>

float angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

(1)void timer(int t){

    glutTimerFunc(30, timer, t+1);///起床，先設定新鬧鐘

////設太小沒用

    glClearColor(1, 0, 0, 0);

    angle++;

    display();

}///再睡著

int main( int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow(" Week14 timer ");

    glutDisplayFunc(display);

    glutTimerFunc(3000, timer, 0);

    glutMainLoop();

}

執行結果:

step4 左右旋轉

程式碼:

int diff=2;

(1)void timer(int t){

    glutTimerFunc(30, timer, t+1);

    glClearColor(1, 0, 0, 0);

    if(angle>90) diff=-2;

    if(angle<0) diff=+2;

    angle += diff;

    display();

}

執行結果:

step5 TRT

程式碼:

#include <GL/glut.h>

float angle=0;

void drawArml(){

    glPushMatrix();

        glScalef(1, 0.5, 0.5);

        glColor3f(1, 0, 0);

        glutSolidCube(0.2);

    glPopMatrix();

}

void display(void)

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glColor3f(1,1,1);

        glutSolidCube(0.4);

        glPushMatrix();

            glTranslatef(-0.2, 0.2, 0);

            glRotatef(angle,0,0,1 );

            glTranslatef(-0.1,0,0);

            drawArml();

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30, timer, t+1);///起床，先設定新鬧鐘

    ///glClearColor(1, 0, 0, 0);

     if(angle>90) diff=-2;

    if(angle<0) diff=+2;

    angle += diff;

    display();

}

int main( int argc, char**argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow(" Week14 timer ");

    glutDisplayFunc(display);

    glutTimerFunc(3000, timer, 0);

    glutMainLoop();

}

執行結果: