於 week14

 week14

開之前的Final project

安裝git並打開git bash

開新的glut專案

把檔案放到桌面的2023graphicsb

使用之前的freeglut

會轉的茶壺

week14-1

#include <GL/glut.h>

float angle = 0;

void timer(int t)

{

    glutTimerFunc(500, timer, t+1);

    angle += 90;

    glutPostRedisplay();

}

void display(){

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutTimerFunc(3000, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

茶壺瘋狂轉

week14-2

*按下空白鍵會瘋狂轉

#include <GL/glut.h>
float angle = 0;
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);
}
void display(){
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glPushMatrix();
        glRotatef(angle, 0, 0, 1);
        glutSolidTeapot(0.3);
    glPopMatrix();
    glutSwapBuffers();
}
int main(int argc, char *argv[])
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
    glutCreateWindow("week14");
    glutKeyboardFunc(keyboard);
    ///glutTimerFunc(3000, timer, 0);
    glutDisplayFunc(display);
    glutMainLoop();
}

用滑鼠轉茶壺

week14-3

*用excel先試試

公式alpha=A2/20

角度=alpha*新+(1-alpha)*舊=B2*D2+(1-B2)*C2

#include <GL/glut.h>

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

float oldX = 0;

void timer(int t)

{

    if(t<100) glutTimerFunc(33, timer, t+1);

    float alpha = t/100.0;

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

    glutPostRedisplay();

}

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

    glutTimerFunc(0, timer, 0);

}

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

{

    if(state == GLUT_DOWN) oldAngle = angle;

    if(state == GLUT_UP) newAngle = angle;

    oldX = x;

    glutPostRedisplay();

}

void motion(int x, int y)

{

    angle += x-oldX;

    oldX = x;

    glutPostRedisplay();

}

void display(){

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    glPushMatrix();

        glRotatef(angle, 0, 0, 1);

        glutSolidTeapot(0.3);

    glPopMatrix();

    glutSwapBuffers();

}

int main(int argc, char *argv[])

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);

    glutCreateWindow("week14");

    glutMouseFunc(mouse);

    glutMotionFunc(motion);

    glutKeyboardFunc(keyboard);

    ///glutTimerFunc(3000, timer, 0);

    glutDisplayFunc(display);

    glutMainLoop();

}

Final project