Yen的week14

1.輸入git指令把老師github資料夾載下來

cd desktop

git clone https://github.com/chiche/2023graphicsa

cd 2023graphicsa

start .

git add . 

2.開啟final_project

3.project week14-1_timer

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);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500,timer,t+1);

    angle += 90;

    glutPostRedisplay();

}

int main(int argc, char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutTimerFunc(2000,timer, 0);

    glutMainLoop();

}

4.week14-2_timer_play

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);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    glutTimerFunc(500,timer,t+1);

    angle += 90;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

int main(int argc, char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutKeyboardFunc(keyboard);

    //glutTimerFunc(2000,timer, 0);

    glutMainLoop();

}

5.week14-3_timer_alpha_interpolation

#include <GL/glut.h>

float angle=0,oldAngle=0, newAngle=0;

void display()

{

    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle,0,0,1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

void timer(int t)

{

    if (t<100) glutTimerFunc(50,timer,t+1);

    float alpha = t/100.0;

    angle = newAngle*alpha + (1-alpha) * oldAngle;

    glutPostRedisplay();

}

void motion(int x, int y)

{

    angle = x;

    glutPostRedisplay();

}

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

{

    if(state==GLUT_DOWN) oldAngle = x;

    if(state==GLUT_UP) newAngle = x;

    glutPostRedisplay();

}

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

{

    glutTimerFunc(0, timer, 0);

}

int main(int argc, char** argv)

{

    glutInit(&argc,argv);

    glutInitDisplayMode(GLUT_DOUBLE| GLUT_DEPTH);

    glutCreateWindow("week14");

    glutDisplayFunc(display);

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    glutMainLoop();

}