//////////////////////////////////////////////?
//?Double?buffered?resizeable?2D?GL?windowing?environment?using?GLUT?
//////////////////////////////////////////////?

#include??
#include??
#include??
#include??
//?
//globale?variables?
//?
const?int?milliseconds_per_frame?=?500;?
float?posX?posY;?
float?posXA[100];?
float?posYA[100];?
int?sizeA[100];?
float?angleA[100];?
int?cnt=0;?
int?size=1;?
int?angle=0;?
int?filled?=?1;?
int?animation=1;?

int?windowWidth=700;?
int?windowHeight=600;?
//?
//?Forward?declarations?
//?
void?DrawScene（）;?
void?DrawSnow（）;?
void?DrawEdge（）;?
void?FillEdge（）;?
//?
//?Initialisation?functions?
//?
static?void?DrawInit（）?
{?
????//?OpenGL?one-time?initialisation?
????glClearColor（0.65F?0.65F0.9F?1.0F）;?
????cnt=0;?
}?

//?
//?Callbacks?
//?
void?Timer（int?id）?
{?int?i;
for（i=0;?i{?
????angleA[i]+=（0.1+5/sizeA[i]）;?
????posXA[i]+=0.25;?
????posYA[i]-=0.5;?
????if（posXA[i]>（windowWidth+50））?
????{?
?????posXA[i]-=windowWidth;?
????}?
????if（posYA[i]<-50）?
????{?
??????posYA[i]+=windowHeight;?
????}?

}?
glutPostRedisplay（）;?
}?

void?DisplayFunc（）?
{?
????glShadeModel（GL_SMOOTH）;?
????glClearColor（0.65F?0.65F0.9F?1.0F）;?
????glClear（GL_COLOR_BUFFER_BIT）;?
????if（animation）?
??????glutTimerFunc（milliseconds_per_frameTimer1）;?
????glMatrixMode（GL_MODELVIEW）;?
????glLoadIdentity（）;?
????DrawScene（）;?
????glutSwapBuffers（）;?
}?

void?PainSnow（int?btn?int?state?int?x?int?y）?
{?
if（btn==GLUT_LEFT_BUTTON?&&?state==GLUT_DOWN）?
{?
????size?=?rand（）%3+1;?
????angle?=?rand（）%3;?
????posX=x;?
????posY?=?windowHeight-y;?
????posXA[cnt]=posX;?
????posYA[cnt]=posY;?
????sizeA[cnt]=size;?
????angleA[cnt]=angle;?
????cnt++;?
}?
}?

void?KeyboardFunc（unsigned?char?key?int?x?int?y）?
{?
????switch（key）?
????{?
????????case?‘a‘?:?
????????case?‘A‘?:?
????????{?
??????????if（animation==0）?
??????????{?
????????????animation=1;?
??????????}else{?
????????????animation=0;?
??????????}?
????????}?
????????case?‘x‘?:?
????????case?（‘X‘）:?
????????{?
??????????cnt=0;?
??????????DrawInit（）;?
??????????break;?
????????}?
????????case?‘f‘:?
????????case?‘F‘:?
????????{?
??????????if（filled==1）?
??????????{?
????????????filled=0;?
??????????}?
???????????else?
??????????{?
???????????filled=1;?
??????????}?
??????????break;?
????????}?
????????case?27:?//?escape?key?pressed?
????????{?
????????????exit（0）;?
????????????break;?
????????}?
????}?
}?


void?ReshapeFunc（?int?x?int?y?）?
{?
????//?Orthographic?view?fills?the?window?
????glMatrixMode（GL_PROJECTION）;?
????glLoadIdentity（）;?
????gluOrtho2D（?0.0?x?0.0?y?）;?
????glViewport（?0?0?x?y?）;?
????windowWidth=x;?
????windowHeight=y;?
}?

void?IdleFunc（）?
{?
????glutPostRedisplay（）;?
}?

void?FillEdge（）?
{?
??????glColor3f（0.70f?0.70f?1.0f）;?
??????glBegin（GL_POLYGON）;?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????7441??2013-01-10?16:42??下雪\下.cpp

?????文件???????3355??2013-01-10?16:38??下雪\下.dsp

?????文件????????512??2013-01-10?16:44??下雪\下.dsw

?????文件??????50176??2013-01-10?16:44??下雪\下.ncb

?????文件??????48640??2013-01-10?16:44??下雪\下.opt

?????文件???????1164??2013-01-10?16:42??下雪\下.plg

?????文件???????4260??2012-12-06?15:10??下雪\下雪.dsp

?????文件????????533??2012-12-06?15:07??下雪\下雪.dsw

?????文件??????50176??2012-12-07?14:33??下雪\下雪.ncb

?????文件????1056256??2012-12-07?14:33??下雪\下雪.opt

?????文件???????1571??2012-12-07?14:28??下雪\下雪.plg

?????文件??????45056??2013-01-10?16:42??下雪\Debug\vc60.pdb

?????文件?????196687??2013-01-10?16:42??下雪\Debug\下.exe

?????文件??????19378??2013-01-10?16:42??下雪\Debug\下.obj

?????文件?????467968??2013-01-10?16:42??下雪\Debug\下.pdb

?????文件?????196653??2012-12-06?15:09??下雪\Debug\下雪.exe

?????文件?????369664??2012-12-07?14:28??下雪\Debug\下雪.pdb

?????目錄??????????0??2013-03-31?20:33??下雪\Debug

?????目錄??????????0??2013-03-31?20:33??下雪

-----------?---------??----------?-----??----

??????????????2519490????????????????????19