#include?“beziercruve.h“

BezierCruve::BezierCruve（Qobject?*parent）?:?Qobject（parent）
????maxDotQty（0）
????dotQty（0）
????dotInterval（1）
{
????cruveDots.clear（）;
????dotQty?=?0;
????dotInterval?=?1;
}

void?BezierCruve::bezier_draw_cruve（MY_POINT?*pInPoints）
{
????if?（dotQty?<=?0）?return;//point?qty?invalide;

????if（（pInPoints[dotQty].x??pInPoints[0].x-dotInterval）
????????????&&?（pInPoints[dotQty].y??pInPoints[0].y-dotInterval））//如果第一點的xy坐標和第n點的不重合，不是一個點
????{
????????//pDC->SetPixel（pInPoints[0].x?pInPoints[0].y?RGB（255000））;//0x0000ff，這里的每一個點都是貝塞爾曲線，pInPoints[0]，每次遞歸之后，拍p[0]會接近最后一點p[dotQty]
????????cruveDots.append（pInPoints[0]）;
????????return;
????}
????MY_POINT?*p1;
????p1?=?new?MY_POINT[dotQty+1];
????int?i?j;
????p1[0]?=?pInPoints[0];
????for（i=1;?i<=dotQty;?i++）//第1點到第n點，可以遍歷n-1次
????{
????????for（j=0;?j<=dotQty-i;j++）//從第0點到n-i，意識是每畫一點之后，j可以遍歷少一點
????????{
????????????//pDC->MoveTo（pInPoints[j].x?pInPoints[j].y）;
????????????//pDC->LineTo（pInPoints[j+1].x?pInPoints[j+1].y）;

????????????pInPoints[j].x?=?（pInPoints[j].x?+?pInPoints[j+1].x）/2.0f;//取得x之間的中點
????????????pInPoints[j].y?=?（pInPoints[j].y?+?pInPoints[j+1].y）/2.0f;//取得每相鄰的y點之間的中點

????????????//pDC->SetPixel（pInPoints[i].x?pInPoints[i].y?RGB（25500））;
????????????//pDC->Rectangle（pInPoints[j].x?-?2?pInPoints[j].y?-2?pInPoints[j].x?+?2?pInPoints[j].y?+?2）;
????????????//Sleep（2000）;
????????}//執行完畢，pInPoints[j]變成兩個線之間的中點

????????p1[i]?=?pInPoints[0];
????}//每次i和j一起，歷遍到沒點連線的最后一個中點

????bezier_draw_cruve（pInPoints）;
????bezier_draw_cruve（p1）;
????delete?p1;
????//emit?cruveDots;//發送信號和數據不可以在遞歸里面發生，否則多次發送
}

void?BezierCruve::bezier_set_point_interval（qint32?pix）
{
????dotInterval?=?pix;
}

void?BezierCruve::bezier_set_dot_qty（qint32?dot）
{
????dotQty?=?dot;
}

void?BezierCruve::bezier_set_max_dot_qty（qint32?maxDot）
{
????maxDotQty?=?maxDot;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-09-06?09:00??BezierCruve\
?????文件????????2361??2017-09-05?21:04??BezierCruve\beziercruve.cpp
?????文件?????????662??2017-09-03?17:07??BezierCruve\beziercruve.h
?????文件????????1132??2017-09-03?17:05??BezierCruve\BezierCruve.pro
?????文件???????23835??2017-09-05?22:17??BezierCruve\BezierCruve.pro.user
?????文件?????????171??2017-09-05?20:57??BezierCruve\commondata.h
?????文件?????????885??2017-09-05?21:33??BezierCruve\main.cpp
?????文件????????3437??2017-09-05?22:16??BezierCruve\mainwindow.cpp
?????文件?????????931??2017-09-05?22:09??BezierCruve\mainwindow.h
?????文件????????1177??2017-09-05?21:42??BezierCruve\mainwindow.ui
?????文件????????2293??2017-09-05?22:08??BezierCruve\renderarea.cpp
?????文件????????2173??2017-09-03?21:53??BezierCruve\renderarea.cpp.fD7112
?????文件????????1175??2017-09-05?22:11??BezierCruve\renderarea.h