antialiasing是什么意思ialiasing在线翻译读

#include

/*DefinetheViewPortSize*/

#defineXVALUE400

#defineYVALUE300

#defineZVALUE200

intW_width=400,W_height=300;

intn=0,vert[100][2],type=GL_LINE_STRIP,v;

intrubberbanding,antialiasing;

enum{false,true};

voidSetupRc(void)

{

glC战国七雄实力排名 learColor非能水也 (0.0f,0.0f,0.0f,0.0f);

glClear(GL_COLOR_BUFFER_BIT);

glColor3f(1.0,0.0,0.0);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluOrtho2D(0,XVALUE,0,YVALU饮酒陶渊明结庐在人境 E);

glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);

}

voidRenderScene(void)

{

inti;

glClear(GL_COLOR_BUFFER_BIT);

if(n==1&&(type==GL_LINE_STRIP||type==GL_LINE_LOOP))

{

glBegin(GL_POINTS);

glVertex2iv(vert[0]);//DrawtheFirstandonlyvertexfor

polylineandclosedpolyline

glEnd();

}

glBegin(type);

for(i=0;i

glEnd();

glutSwapBuffers();//双缓冲区图形

绘制

}

voidReshape(intwidth,intheight)

{

floatw_aspect=4.0/3.0,aspect=((float)width)/height;

//视口保持w_aspect的纵横比

if(aspect<=w_aspect)

glViewport(0,(height-width/w_aspect)/2,width,width/w_aspect);

else

glViewport((width-height*w_aspect)/2,0,height*w_aspect,height);

//透视视窗转换

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluOrtho2D(0,XVALUE,0,YVALUE);

}

voidKeyboard(unsignedcharkey,intx,inty)

{

switch(key)

{

case\'a\':antialiasing=!antialiasing;

if(antialiasing)

{

glEnable(GL_BLEND);

glEnable(GL_LINE_SMOOTH);

}

else

{

glDisable(GL_BLEND);

glDisable(GL_LINE_SMOOTH);

}

break;

case\'c\':n=0;break;

case\'l\':type=GL_LINE_STRIP;break;

case\'p\':type=GL_LINE_LOOP;break;

case\'v\':type=GL_POINTS;break;

}

glutPostRedisplay();

}

/*

*SpecialKeyCallBack

*/

voidSpecialKey(intkey,intx,inty)

{

if(glutGetModifiers()==(GLUT_ACTIVE_SHIFT|GLUT_ACTIVE_ALT))exit(0);

}

/*

*FindaVertexthatisnear(x,y)

*/

intfindVertex(intx,inty)

{

intdx,dy;

inti;

for(i=0;i

{

dx=vert[i][0]-x;

dy=vert[i][1]-y;

if(dx*dx+dy*dy<100)returni;//Returnitslocation

indexinvert

}

return(-1);//

Return-1ifnotfound

}

/*

*MouseCallBack

*/

voidMou暖的拼音 se(intbutton,intstate,intx,inty)

{

inti;

//Upperleftcorner=(0,0)

switch(button)

{

caseGLUT_LEF三峡能源 T_BUTTON:

if(state==GLUT_DOWN)

{

v=n++;

//Addanewvertex

vert[v][0]=x;

vert[v][1]=W_height-1-y;

rubberbanding=true;

//Startrubberbanding

glutPostRedisplay();

}

else

rubberbanding=false;

//Endrubberbanding

break;

caseGLUT_RIGHT_BUTTON:

if(state==GLUT_DOWN&&(v=findVertex(x,W_height-1-y))!=-1)

{

if(glutGetModifiers()==GLUT_ACTIVE_CTRL)

{

for(i=v;i

{

//Deltetvertexindexedbyv

vert[i][0]=vert[i+1][1];

}

n--;

}

else

{

vert[v][0]=x;

//Attachvertextocursor

vert[v][1]=W_height-1-y;

rubberbanding=true;//

Startrubberbanding

}

glutPostRedisplay();

}江南曲李益

elserubberbanding=false;//End

rubberbanding

break;

}

}

/*

*MotionCallBack

*/

voidMotion(intmouseX,intmouseY)

{

if(rubberbanding)

{

vert[v][0]=mouseX;

vert[v][1]=W_height-1-mouseY;

glutPostRedisplay();

}

}

/*

*PassiveCallBack

*/

voidPassive(i新春对联大全七字简单 ntmouseX,intmouseY)

{

intx,y;

//Upperleftcorner=(0,0)

x=mouseX;

y=W_height-1-mouseY;//Convertto

imagespacecoordinates

glutPostRedisplay();

}

/*

*MenuCallBack

*/

voidMenu(intitem)

{

switch(item)

{

case1:glCol茨威格简介及作品 or3f(1.0,0.0,0.0);break;

case2:glColor3f(0.0,1.0,0.0);break;

case3:glColor3f(0.0,0.0,1.0);break;

}

}

/*

*MainLoop

*/

intmain(intargc,char**argv)

{

glutInit(&argc,arg荷花的诗词 v);

glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);//Set

theDisplayMode

glutInitWindowSize(W_width,W_height);

//SettingWindowSize

glutInitWindowPosition(200,100);

//SettingWindowStartingPosition

glutCreateWindow(\"橡皮筋\");

//CreateaOpenGLWindow

SetupRc();

//SettheInitialDrawSence

glutDisplayFunc(RenderScene);

//theWindowDrawCallbackFunction

glutReshapeFunc(Reshape);

//theWindowChangeCallbackFunction

glutKeyboardFunc(Keyboard);

//theKeyboardCallbackFunction

glutSpecialFunc(SpecialKey);

//theSpecialCallbackFunction

glutMouseFunc(Mouse);

//Setmousebuttoneventfunction

glutMotionFunc(Motion);

//Setmousemovementfunction

glutPassiveMotionFunc(Passive);

//Setpassivemousemovementfunction

glutMainLoop();

//theWindowLoop

return0;

}