public override void Render(object opaqueContext, ViewControl vc)
{
Matrix4F normWorld = GetManipulatorMatrix();
if (normWorld == null)
{
return;
}
var context = opaqueContext as GUILayer.SimpleRenderingContext;
if (context == null)
{
return;
}
float RingDiameter = 2 * AxisLength;
Color xcolor = (m_hitRegion == HitRegion.XAxis) ? Color.Gold : XAxisColor;
Color ycolor = (m_hitRegion == HitRegion.YAxis) ? Color.Gold : YAxisColor;
Color Zcolor = (m_hitRegion == HitRegion.ZAxis) ? Color.Gold : ZAxisColor;
Color lColor = (m_hitRegion == HitRegion.LookAxis) ? Color.Gold : Color.Cyan;
float s = Util.CalcAxisScale(vc.Camera, normWorld.Translation, RingDiameter, vc.Height);
Vec3F axScale = new Vec3F(s, s, s);
Matrix4F rot = new Matrix4F();
Matrix4F scale = new Matrix4F();
scale.Scale(axScale);
rot.RotX(MathHelper.PiOver2);
Matrix4F xform = scale * rot * normWorld;
Util3D.DrawRing(context, xform, Zcolor);
rot.RotZ(-MathHelper.PiOver2);
xform = scale * rot * normWorld;
Util3D.DrawRing(context, xform, xcolor);
xform = scale * normWorld;
Util3D.DrawRing(context, xform, ycolor);
Matrix4F billboard
= Util.CreateBillboard(normWorld.Translation, vc.Camera.WorldEye, vc.Camera.Up, vc.Camera.LookAt);
rot.RotX(MathHelper.PiOver2);
scale.Scale(s * LookRingScale);
xform = scale * rot * billboard;
Util3D.DrawRing(context, xform, lColor);
}
