public int OptimizingLevel = 20; //优化等级，数字越大优化级别越高，越容易失真
public void Set(DXFStructure dxf, ELLIPSE item, float ScaleX = 1, float ScaleY = 1)
{
var goLayer = GoView.Content.GetLayer(item.C8);
if (goLayer != null)
{
lr.material = goLayer.LayerMaterial;
ZoomAdjust = goLayer.ZoomAdjust;
}
Vector3 center = new Vector3((float)item.C10, (float)item.C20, (float)item.C30); //中心点
var theta = Mathf.Atan2((float)item.C21, (float)item.C11) * (180 / Mathf.PI); //椭圆的旋转角度
Quaternion q = Quaternion.AngleAxis(theta, Vector3.forward); //创建一个旋转
//长轴长度
var a = Mathf.Abs(Vector3.Distance(new Vector3(), new Vector3((float)item.C11, (float)item.C21, (float)item.C31)));
LongAxis = a;
//短轴长度
var b = a * (float)item.C40;
//计算组层椭圆的元素数量，用于优化
int resolution = (int)((a + b) / 2.0 / OptimizingLevel);
if (resolution > MaxResolution)
{
resolution = MaxResolution;
}
else if (resolution < MinResolution)
{
resolution = MinResolution;
}
lr.SetVertexCount(resolution + 1);
for (int i = 0; i < resolution; i++)
{
var ii = (float)(i * (item.C42 - item.C41) / resolution) + (float)item.C41;
//计算出的坐标点
var v = new Vector3(a * Mathf.Cos(ii), b * Mathf.Sin(ii), 0.0f);
//加入旋转和中心点位置
v = q * v + center;
//增加缩放
lr.SetPosition(i, new Vector3(v.x * ScaleX, v.y * ScaleY, v.z));
}
//最后增加一点用于处理最后一段的连线
//计算出的坐标点
var v1 = new Vector3(a * Mathf.Cos((float)item.C42), b * Mathf.Sin((float)item.C42), 0.0f);
//加入旋转和中心点位置
v1 = q * v1 + center;
//增加缩放
lr.SetPosition(resolution, new Vector3(v1.x * ScaleX, v1.y * ScaleY, v1.z));
this.gameObject.isStatic = true;
}
private void EllipseButton_Click(object sender, EventArgs e)
{
ELLIPSE MyEllipse = new ELLIPSE();
MyEllipse.getparameters();
MyEllipse.drawshape(this);
MyEllipse.MyPen.Dispose();
MyEllipse.description(this);
MyEllipse.enabling(this);
}