cocos2dx绘制实心圆

最新推荐文章于 2023-10-10 04:18:57 发布

原创最新推荐文章于 2023-10-10 04:18:57 发布 · 735 阅读

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本文介绍了一种使用Cocos2d-x游戏引擎绘制双层圆形图案的方法，通过计算顶点坐标来实现不同大小的同心圆，并利用颜色填充来区分两层圆环。

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int sum = 10;
const float coef = 2.0f * (float)M_PI/sum;
CCPoint *vertices = new CCPoint[sum];

  //底部圆
  for(unsigned int i = 0;i < sum; i++)
  {
   float rads = i*coef;
   GLfloat j = 2.0 * cosf(rads) + point.x;
   GLfloat k = 2.0 * sinf(rads) + point.y;
   vertices[i].x=j;
   vertices[i].y=k;
  }
  ccDrawColor4F(0/255.0, 51/255.0, 154/255.0, 0.5);
  ccDrawPoly( vertices, sum,true);

  //上面的小圆
  for(unsigned int i = 0;i < sum; i++) {
   float rads = i*coef;
   GLfloat j = 1.5 * cosf(rads) + point.x;
   GLfloat k = 1.5 * sinf(rads) + point.y;
   vertices[i].x=j;
   vertices[i].y=k;
  }
  //ccDrawColor4F(109/255.0, 255/255.0, 250/255.0, 1.0);
  ccDrawSolidPoly( vertices, sum,ccc4FFromccc4B(ccc4(109, 255, 250, 220)));