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[粒子生成器]DParticle/src/dxp/dpt/shape/Triangle.php

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+<?php
+namespace dxp\dpt\shape;
+
+class Triangle extends ShapeBase{
+ public static function getVector3($r,$deg){
+  //正三角形算法
+  $pos=array();
+  $sin=sin(deg2rad(30));
+  $cos=cos(deg2rad(30));
+  
+  $l=2*$r*$cos;
+  for($i=-$r*$cos;$i<=$r*$cos;$i+=0.1){
+   $pos[]=array($i,0,-$r*$sin);
+  }
+  
+  for($i=0;$i<=$l;$i+=0.1){
+   $x=$i*$cos;
+   $z=$i*$sin;
+   $pos[]=array(-$z,0,$r-$x);
+   $pos[]=array($z,0,$r-$x);
+  }
+  return $pos;
+  unset($pos,$r,$deg,$sin,$cos,$i,$x,$z);
+ }
+}
+?>