#include?
#include?
#include?

const?GLfloat?Pi?=?3.1415926536f;

//定義點集
struct?data{
????GLfloat?x;
????GLfloat?y;
????GLfloat?z;
}Point[4];

void?init（）??//初始化函數(shù)
{
	glViewport（00100100）;
????//glClearColor（1.0?1.0?1.0?0.0）;?//設(shè)置背景顏色
????glMatrixMode（GL_PROJECTION）;???????//?設(shè)置投影參數(shù)
????//glLoadIdentity（）;
????gluOrtho2D（0.030.00.020.0）;?//?設(shè)置場景的大小
}

void?Bernstain（）??//Bernstain基函數(shù)
{

????glClear（GL_COLOR_BUFFER_BIT）;

????glTranslatef（10.0f?10.0f?0.0f）;?//平移圖形
????glScalef（1.0f?1.0f?1.0f）;?//縮小圖像0.5倍
????//glRotatef（60.0f?1.0f?0.0f?0.0f）;?//沿x軸旋轉(zhuǎn)60度

????//四個點作為控制頂點
????Point[0].x?=?0.0;
????Point[0].y?=?0.0;
????Point[0].z?=?0.0;
????Point[1].x?=?1.0;
????Point[1].y?=?1.0;
????Point[1].z?=?1.0;
????Point[2].x?=?2.0;
????Point[2].y?=?-1.0;
????Point[2].z?=?-1.0;
????Point[3].x?=?3.0;
????Point[3].y?=?0.0;
????Point[3].z?=?0.0;

????glColor3f（0.0?0.0?1.0）;?//設(shè)置線條顏色
????glPointSize（2）;?//設(shè)置點的大小

????glBegin（GL_LINES）;
????????glVertex3f（Point[0].x?Point[0].y?Point[0].z）;
????????//glVertex3f（Point[0].x?Point[0].y?Point[0].z）;
????????glVertex3f（Point[1].x?Point[1].y?Point[1].z）;
????????glVertex3f（Point[1].x?Point[1].y?Point[1].z）;
????????glVertex3f（Poin