44 lines
794 B
PHP
44 lines
794 B
PHP
<?php
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namespace dxp\dpt\shape;
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/*
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圆算法
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By:aabbcc872[dxp]
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最后一次优化:2017.10.11
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参数说明:
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r=半径[double|int|float]
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data=array(密度)[建议为90因数，设为-1弹性计算]
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*/
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class Circle extends ShapeBase{
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public static function getVector3($r=2,$data=array()){
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$pos=array();
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//密度控制
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if(!isset($data[0])){
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$k=-1;
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}
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if($data[0]==0){
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return array(0,0,0);
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}
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if($data[0]==-1){
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$ar=round($r,1);
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$c=0;
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for($a=0;$a<=$ar;$a+=0.1){
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$c++;
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}
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$b=360/($c*4);
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if($b>90 || $b<0){
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$b=3;
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}
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for($i=0;$i<=90;$i+=$b){
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$x=$r*cos(deg2rad($i));
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$z=$r*sin(deg2rad($i));
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$pos[]=array($x,0,$z);
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$pos[]=array(-$z,0,$x);
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$pos[]=array(-$x,0,-$z);
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$pos[]=array($z,0,-$x);
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}
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unset($r,$data,$i,$x,$z);
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return $pos;
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}
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}
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?>
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