#include“stdafx.h“
#include?
#include
#include

#define?XVALUE?800//視口大小
#define?YVALUE?600
#define?ZVALUE?200

#define?MAX_CPTX?50?//最大控制點數

#define?float_x（x）?（（float）x）/XVALUE
#define?float_y（y）?（float（W_height?-?1?-?y））/YVALUE

int?W_width?=?XVALUE?W_height?=?YVALUE;

int?Ctrl_P_Num?=?0;//實際控制點數
int?type?=?GL_LINE_STRIP?v;
int?rubberbanding?antialiasing;//彈性的、消除走樣標志位

typedef?struct
{
	GLfloat?x?y;
}?POINT;
POINT?Control_Local[MAX_CPTX];//存儲控制點坐標

void?bezier（）?//德卡斯特里奧算法
{
	float?Approach_x[1000];
	float?Approach_y[1000];
	GLfloat?Path_Point[1000][2];

	int?k?=?0;
	for?（double?t?=?0.0;?t?<=?1;?t?+=?0.001）
	{
		for?（int?i?=?1;?i?		{
			for?（int?j?=?0;?j?			{
				if?（i?==?1）?//?i==1時第一次迭代由已知控制點計算????
				{
					Approach_x[j]?=?Control_Local[j].x?*?（1?-?t）?+?Control_Local[j?+?1].x?*?t;
					Approach_y[j]?=?Control_Local[j].y?*?（1?-?t）?+?Control_Local[j?+?1].y?*?t;
					continue;
				}
				//?i?!=?1時通過上一次迭代的結果計算????
				Approach_x[j]?=?Approach_x[j]?*?（1?-?t）?+?Approach_x[j?+?1]?*?t;
				Approach_y[j]?=?Approach_y[j]?*?（1?-?t）?+?Approach_y[j?+?1]?*?t;
			}

		}
		Path_Point[k][0]?=?Approach_x[0];
		Path_Point[k][1]?=?Approach_y[0];
		k++;
	}

	glColor3f（1.0?1.0?0.0）;
	glBegin（GL_LINE_STRIP）;
	for?（int?i?=?0;?i?	{
		glVertex2fv（Path_Point[i]）;
	}
	glEnd（）;
}

void?SetupRc（void）//初始化繪制環境
{
	glClearColor（0.0f?0.0f?0.0f?0.0f）;//用于清除的顏色
	glClear（GL_COLOR_BUFFER_BIT）;//清除顏色緩沖以及深度緩沖


	glMatrixMode（GL_PROJECTION）;//指定當前矩陣對投影矩陣應用隨后的矩陣操作.
	glLoadIdentity（）;//對當前矩陣進行初始化
	gluOrtho2D（0?XVALUE?0?YVALUE）;

	glBlendFunc（GL_SRC_ALPHA?GL_ONE_MINUS_SRC_ALPHA）;//指定紅綠藍和?alpha?目標混合因子?源混合因子如何計算

}

void?RenderScene（void）//渲染
{
	int?i;

	glClear（GL_COLOR_BUFFER_BIT）;
	glPointSize（5.0）;
	if?（Ctrl_P_Num?==?1?&&?（type?==?GL_LINE_STRIP?||?type?==?GL_LINE_LOOP））
	{
		glBegin（GL_POINTS）;//點模式，把每一個頂點作為一個點進行處理
		glVertex2f（Control_Local[0].x?Control_Local[0].y）;//
		glEnd（）;
	}
	glLineWidth（5.0f）;//指定線的寬度

	glBegin（type）;
	glColor3f（0.0?0.0?1.0）;
	for?（i?=?0;?i?	{
		glVertex2f（Control_Local[i].x?Control_Local[i].y）;
	}
	glEnd（）;
	
	if?（Ctrl_P_Num?>=?3）//出現兩條邊后開始繪制Bezier曲線
	{
		bezier（）;
	}
	glutSwapBuffers（）;//雙緩沖區圖形繪制
}

void?Reshape（int?width?int?height）
{

	float?w_aspect?=?（（float）XVALUE）?/?YVALUE?aspect?=?（（float）width）?/?height;

	
	if?（aspect?<=?w_aspect）//視口保持w_aspect的縱橫比
		glViewport（0?（height?-?width?/?w_aspect）?/?2?width?width?/?w_aspect）;
	else
		glViewport（（width?-?height*w_aspect）?/?2?0?height*w_aspect?height）;

	//透視視窗轉換	
	glMatrixMode（GL_PROJECTION）;//指定當前矩陣對投影矩陣應用隨后的矩陣操作.
	glLoadIdentity（）;//對當前矩陣進行初始化?
	gluOrtho2D（0?1?0?1）;
}

void?Keyboard（unsigned?char?key?int?x?int?y）//普通鍵盤回調
{
	switch?（key）
	{
		case?‘a‘://消除鋸齒，使線段平滑
		{
			antialiasing?=?!antialiasing;//消除走樣標志位
			if?（antialias

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

?????文件???????6584??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Bezier_experiment.cpp

?????文件???????4553??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\Bezier_experiment.vcxproj

?????文件???????1324??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\Bezier_experiment.vcxproj.filters

?????文件????????174??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\Bezier_experiment.lastbuildstate

?????文件???????1662??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\cl.command.1.tlog

?????文件???????4262??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\CL.read.1.tlog

?????文件???????1426??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\CL.write.1.tlog

?????文件???????1502??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\link.command.1.tlog

?????文件???????3404??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\link.read.1.tlog

?????文件????????752??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog\link.write.1.tlog

?????文件???????1628??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_experiment.log

?????文件??????22741??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_experiment.obj

?????文件????1703936??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\Debug\Bezier_experiment.pch

?????文件??????11741??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\Debug\stdafx.obj

?????文件??????84992??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\vc120.idb

?????文件?????151552??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\vc120.pdb

?????文件???????1580??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\ReadMe.txt

?????文件????????223??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\stdafx.cpp

?????文件????????234??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\stdafx.h

?????文件????????236??2017-04-02?09:43??Bezier_experiment\Bezier_experiment\targetver.h

?????文件???30212096??2017-05-13?21:54??Bezier_experiment\Bezier_experiment.sdf

?????文件????????997??2017-04-02?09:43??Bezier_experiment\Bezier_experiment.sln

????..A..H.?????19968??2017-05-13?21:54??Bezier_experiment\Bezier_experiment.v12.suo

?????文件??????41984??2017-04-04?22:54??Bezier_experiment\Debug\Bezier_experiment.exe

?????文件?????470584??2017-04-04?22:54??Bezier_experiment\Debug\Bezier_experiment.ilk

?????文件?????741376??2017-04-04?22:54??Bezier_experiment\Debug\Bezier_experiment.pdb

?????文件????3080192??2017-04-02?09:43??Bezier_experiment\ipch\bezier_experiment-e39e0123\bezier_experiment-128d144d.ipch

?????目錄??????????0??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug\Bezier_e.BE11A5C9.tlog

?????目錄??????????0??2017-04-04?22:54??Bezier_experiment\Bezier_experiment\Debug

?????目錄??????????0??2017-04-02?09:43??Bezier_experiment\ipch\bezier_experiment-e39e0123

............此處省略7個文件信息