week14timer

#include <GL/glut.h>
void display()
{
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glutSolidSphere(0.3,30,30);
    glutSwapBuffers();
}
int main(int argc, char** argv)
{
    glutInit( &argc, argv );
    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );
    glutCreateWindow(" week14 ");
    glutDisplayFunc(display);
    glutMainLoop();
} 

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 時間到了背景變紅

#include <GL/glut.h>

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glutSolidSphere(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");

    glutDisplayFunc(display);

    glutTimerFunc(4000,timer,0);

    glutMainLoop();

}

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時間到了方塊旋轉

#include <GL/glut.h>

int angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    angle++;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(4000,timer,0);

    glutMainLoop();

}

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方塊旋轉角度限制

#include <GL/glut.h>

int angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    angle+=diff;

    if(angle>180)diff = -diff;

    if(angle<0) diff = -diff;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(4000,timer,0);

    glutMainLoop();

}

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程式細節修改

#include <GL/glut.h>

int angle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidCube(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    angle+=diff;

    if(angle>90 || angle<0)diff = -diff;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(0,timer,0);///馬上執行

    glutMainLoop();

}

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身體與手臂

#include <GL/glut.h>

int angle=0;

void drawArm1()   ///畫手臂

{

    glPushMatrix();

        glScalef(1,0.5,0.5);

        glColor3f(1,0,0);

        glutSolidCube(0.3);

    glPopMatrix();

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glColor3f(1,1,1);

        glutSolidCube(0.4);     ///畫身體

        glPushMatrix();

            glTranslatef(-0.2,+0.2,0);   ///手臂位置

            glRotatef(angle,0,0,1);       ///手臂旋轉

            glTranslatef(-0.15,0,0);

            drawArm1();                      ///畫手臂

        glPopMatrix();

    glPopMatrix();

    glutSwapBuffers();

}

int diff=2;

void timer(int t)

{

    glutTimerFunc(30,timer,t+1);

    angle+=diff;

    if(angle>90 || angle<0)diff = -diff;

    display();

}

int main(int argc, char** argv)

{

    glutInit( &argc, argv );

    glutInitDisplayMode( GLUT_DOUBLE | GLUT_DEPTH );

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(0,timer,0);

    glutMainLoop();

}