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网站设计特效代码：游戏中的正方体

[来源：蓝色理想] [作者：alenalen] [日期：2008-05-15] [热度：]

这是我在做的一个游戏的半成品,整理了一下发出来.

原理:

    通过更新变换矩阵来记录转动(函数remx()).
    利用矩阵计算出转动后的正方体顶点坐标,
    把各个顶点的空间坐标按”近大远小”转换成平面坐标(函数p2d()),
    用正方体各个面的法向量的z坐标判断该面是否可见,
    用高为1px的div层模拟画出四边形(函数gra2htm()).

鼠标拖曳的代码用别人的代码修改的.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>Cube</title> <script type="text/javascript"> function gra2htm(clr,a,b,c,d){ var result=''; var maxx=Math.max(a[0],b[0],c[0],d[0]),minx=Math.min(a[0],b[0],c[0],d[0]); var maxy=Math.max(a[1],b[1],c[1],d[1]),miny=Math.min(a[1],b[1],c[1],d[1]); x=new Array(a[0],b[0],c[0],d[0],a[0],b[0],c[0],d[0],a[0],b[0]); y=new Array(a[1],b[1],c[1],d[1],a[1],b[1],c[1],d[1],a[1],b[1]); /*/begin for(var i=0;i<=3;i++){ result+='<div style="position:absolute; overflow:hidden; left:' +x[i]+'px; top:'+y[i]+'px; width:2px; height:2px; background-color:#FFF"></div>'; } //end*/ if(maxx-minx>=maxy-miny){ for(var i=3;i<=6;i++) if(y[i]==miny){ var k=l=i; break; } if(y[k]==y[k-1]) k--; xa=(x[k-1]-x[k])/(y[k-1]-y[k]); if(y[l]==y[l+1]) l++; xb=(x[l+1]-x[l])/(y[l+1]-y[l]); pl=x[k];pw=x[l]-x[k]; for(var i=miny+1;i<=maxy;i++){ if(i>y[k-1]){ k--; xa=(x[k-1]-x[k])/(y[k-1]-y[k]); } if(i>y[l+1]){ l++; xb=(x[l+1]-x[l])/(y[l+1]-y[l]); } result+='<div style="overflow:hidden; top:'+i +'px; left:'+Math.round(pl+=xa) +'px; width:'+Math.round(pw+=xb-xa) +'px; height:1px; position:absolute; background-color:'+clr +';"></div>'; } } else { for(var i=3;i<=6;i++) if(x[i]==minx){ var k=l=i; break; } if(x[k]==x[k+1]) k++; ya=(y[k+1]-y[k])/(x[k+1]-x[k]); if(x[l]==x[l-1]) l--; yb=(y[l-1]-y[l])/(x[l-1]-x[l]); pt=y[k];ph=y[l]-y[k]; for(var i=minx+1;i<=maxx;i++){ if(i>x[k+1]){ k++; ya=(y[k+1]-y[k])/(x[k+1]-x[k]); } if(i>x[l-1]){ l--; yb=(y[l-1]-y[l])/(x[l-1]-x[l]); } result+='<div style="overflow:hidden; left:'+i +'px; top:'+Math.round(pt+=ya) +'px; height:'+Math.round(ph+=yb-ya) +'px; width:1px; position:absolute; background-color:'+clr +';"></div>'; } } return result; } function remx(type,theta,omx){ var sinA=Math.sin(theta),cosA=Math.cos(theta); var m=new Array(); switch(type){ case 'rx': m[0]=omx[0];m[1]=omx[1];m[2]=omx[2]; m[3]=omx[3]*cosA-omx[6]*sinA;m[4]=omx[4]*cosA-omx[7]*sinA;m[5]=omx[5]*cosA-omx[8]*sinA; m[6]=omx[3]*sinA+omx[6]*cosA;m[7]=omx[4]*sinA+omx[7]*cosA;m[8]=omx[5]*sinA+omx[8]*cosA; break; case 'ry': m[0]=omx[0]*cosA-omx[6]*sinA;m[1]=omx[1]*cosA-omx[7]*sinA;m[2]=omx[2]*cosA-omx[8]*sinA; m[3]=omx[3];m[4]=omx[4];m[5]=omx[5]; m[6]=omx[0]*sinA+omx[6]*cosA;m[7]=omx[1]*sinA+omx[7]*cosA;m[8]=omx[2]*sinA+omx[8]*cosA; break; } return m; } function p2d(x,y,z){ var l=100,t=100; var result=new Array(); result[0]=Math.round(l+x/(z*0.004+1.25)); result[1]=Math.round(t+y/(z*0.004+1.25)); return result; } </script> <script type="text/javascript"> //const var pa=new Array(); pa[1]=new Array(50,50,-50); pa[2]=new Array(50,50,50); pa[3]=new Array(50,-50,50); pa[4]=new Array(50,-50,-50); pa[5]=new Array(-50,50,-50); pa[6]=new Array(-50,50,50); pa[7]=new Array(-50,-50,50); pa[8]=new Array(-50,-50,-50); var idx=new Array(); idx[0]=new Array(1,2,3,4); idx[1]=new Array(1,4,8,5); idx[2]=new Array(1,5,6,2); idx[3]=new Array(7,3,2,6); idx[4]=new Array(7,8,4,3); idx[5]=new Array(7,6,5,8); var clr=new Array('#03c','#c00','#fc0','#f60','#fff','#090'); //end function cube(id){ if(!document.getElementById(id)) return false; this.id=document.getElementById(id); this.angle=new Array(); this.angle2=new Array(); for(i=1;i<=8;i++) this.angle[i]=new Array(3); // alert('success'); } cube.prototype={ matrix:new Array(1,0,0,0,1,0,0,0,1), paint:function(){ var result=''; for(i=1;i<=8;i++){ this.angle[i][0]=this.matrix[0]*pa[i][0]+this.matrix[1]*pa[i][1]+this.matrix[2]*pa[i][2]; this.angle[i][1]=this.matrix[3]*pa[i][0]+this.matrix[4]*pa[i][1]+this.matrix[5]*pa[i][2]; this.angle[i][2]=this.matrix[6]*pa[i][0]+this.matrix[7]*pa[i][1]+this.matrix[8]*pa[i][2]; this.angle2[i]=p2d(this.angle[i][0],this.angle[i][1],this.angle[i][2]); } for(i=0;i<6;i++){ if((this.angle2[idx[i][2]][0]-this.angle2[idx[i][1]][0])* (this.angle2[idx[i][0]][1]-this.angle2[idx[i][1]][1])- (this.angle2[idx[i][2]][1]-this.angle2[idx[i][1]][1])* (this.angle2[idx[i][0]][0]-this.angle2[idx[i][1]][0])<0){ result+=gra2htm(clr[i],this.angle2[idx[i][3]],this.angle2[idx[i][2]],this.angle2[idx[i][1]], this.angle2[idx[i][0]]); } } // document.getElementById('aa').value=result; this.id.innerHTML=result; }, roll:function(type,theta){ this.matrix=remx(type,theta,this.matrix); // this.paint(); } } </script> <script type="text/javascript"> var tmr=(new Date()).getTime(); function drag(obj,e){ e=e?e:window.event; var setx=e.clientX,sety=e.clientY; if(document.addEventListener){ document.addEventListener('mousemove', inFmove, true); document.addEventListener('mouseup', inFup, true); } else if(document.attachEvent){ document.attachEvent('onmousemove', inFmove); document.attachEvent('onmouseup', inFup); } function inFmove(e){ tmr2=(new Date).getTime(); if(tmr2-tmr<100) return false; tmr=tmr2; cc.roll('ry',(e.clientX-setx)/50); setx=e.clientX; cc.roll('rx',(e.clientY-sety)/50); sety=e.clientY; cc.paint(); return false; } function inFup(){ if(document.removeEventListener){ document.removeEventListener('mousemove', inFmove, true); document.removeEventListener('mouseup', inFup, true); } else if(document.detachEvent){ document.detachEvent('onmousemove', inFmove); document.detachEvent('onmouseup', inFup); } } // shawl.qiu script } </script> </head> <body> <div id="t" style="width:200px;height:200px;background-color:#000000;" oncontextmenu="return false" onmousedown="drag(this,event)"></div> <br /> <input type="button" onClick="clearInterval(tt)" value="Stop" /> <input type="button" onClick="clearInterval(tt);tt=setInterval('cc.roll(\'rx\',0.2);cc.paint();',100)" value="Down" /> <input type="button" onClick="clearInterval(tt);tt=setInterval('cc.roll(\'ry\',0.2);cc.paint();',100)" value="Right" /> <script type="text/javascript"> var tt,cc=new cube('t'); cc.roll('ry',1); cc.paint(); </script> </body> </html>

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Tags:网站设计特效代码游戏中的正方体网站设计特效代码游戏中正方体正方体

网站设计特效代码：游戏中的正方体

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