随手小代码——绘制花托(轮胎)

来源：互联网发布：易语言cc攻击器源码编辑：程序博客网时间：2024/04/28 09:36

百度文库的一篇文章，介绍了OpenGL超级宝典中经常用到的gltDrawTorus的实现原理，图文并茂，很不错。

原文链接：http://wenku.baidu.com/view/57545ef1fab069dc50220140.html

（本文链接位置：http://blog.csdn.net/wlsgzl/article/details/12835639）

读完这篇文章后，我也着手实现了一下，现贴出我的代码。

void DrawTorus(GLfloat fMajorRadius, GLfloat fMinorRadius, GLint nNumMajor, GLint nNumMinor){GLfloat fr=(fMajorRadius-fMinorRadius)/2;GLfloat fR=fr+fMinorRadius;GLfloat fMajorStep=2.0f*PI/nNumMajor;GLfloat fMinorStep=2.0f*PI/nNumMinor;GLfloat fMajorAngle=0.0f;GLfloat fMajorAngle2=0.0f;GLfloat fMinorAngle=0.0f;GLfloat fMinorAngle2=0.0f;GLfloat fX=0.0f;GLfloat fY=0.0f;GLfloat fZ=0.0f;GLfloat fX2=0.0f;GLfloat fY2=0.0f;GLfloat fZ2=0.0f;glBegin(GL_TRIANGLE_STRIP);for (fMajorAngle=0.0f;fMajorAngle<=2.0*PI;fMajorAngle+=fMajorStep){for (fMinorAngle=0.0f;fMinorAngle<=2.0f*PI;fMinorAngle+=fMinorStep){fX=(fR+fr*cos(fMinorAngle))*cos(fMajorAngle);fY=(fR+fr*cos(fMinorAngle))*sin(fMajorAngle);fZ=fr*sin(fMinorAngle);glVertex3f(fX,fY,fZ);fMajorAngle2=fMajorAngle+fMajorStep;fMinorAngle2=fMinorAngle+fMinorStep;fX2=(fR+fr*cos(fMinorAngle2))*cos(fMajorAngle2);fY2=(fR+fr*cos(fMinorAngle2))*sin(fMajorAngle2);fZ2=fr*sin(fMinorAngle2);glVertex3f(fX2,fY2,fZ2);}}glEnd();}