喬巴的補交作業

計時器Timer

#include <GL/glut.h> #include <mmsystem.h>///Now (1) #include <stdio.h>///printf() void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glutSolidTeapot( 0.3 ); glutSwapBuffers(); } void timer(int t)///NOW timer!!!! { glutTimerFunc(1000, timer, t+1 );///NOW timer!!!! 起床要播下一個鬧鐘 printf("timer(t) 的 t是 %d\n", t);///順便印一下現在的t是多少 準確地告訴你放第幾次屁 PlaySoundA("fart.wav", NULL, SND_ASYNC);///Now (2) ///NOW timer!!!! } ➜去wav檔案下載尋找檔案 int main(int argc, char**argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); glutInitWindowSize(500,500);///變大了 glutCreateWindow("week 14 timer"); glutDisplayFunc(display); glutTimerFunc(3000, timer, 0);///NOW timer!!!! glutMainLoop(); }

內插公式

#include <GL/glut.h> #include <mmsystem.h>///Now (1) float angle=0; float nowX=0;///NOW2 void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); ///glRotatef(angle, 0,0,1); glTranslatef(nowX, 0, 0);///NOW2 glutSolidTeapot( 0.3 ); glPopMatrix(); glutSwapBuffers(); } void timer(int t)///NOW timer!!!! { /// 1000 ms = 1 sec, 30 ms = 1/33 sec , 33 fps glutTimerFunc(30, timer, t+1 );///NOW timer!!!! 起床要播下一個鬧鐘 float alpha = (t%33) / 33.0;///NOW2 alpha 內插 nowX = alpha* 1 + (1-alpha)* -1 ;///NOW2 angle += 1; glutPostRedisplay();///系統重繪畫面 } int main(int argc, char**argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH); glutInitWindowSize(500,500);///變大了 glutCreateWindow("week 14 timer"); glutDisplayFunc(display); glutTimerFunc(1000, timer, 0);///NOW timer!!!! glutMainLoop(); }

動畫