| Article | 70002427 |
| Type | HowTo |
| Product | Engine |
| Version | 10 |
| Date Added | 10/28/2023 12:00:00 AM |
| Fixed | 10.1005.0.2 (10/28/2023 12:00:00 AM) |
| Submitted by | bandiroli |
Summary
How can I draw aligned to view entities that are not overlaped by existing model entities
Solution
In order to draw aligned to view entities that are not overlap by existing model entities,
You need to create a vdEntities collections containing the align entities and not add them to the active layout entities
Instead draw them in the AfterDraw event of vdDocument by disabling Depth Buffering as follow:
1. Create a polyface box and add it to the model entities
doc.New();
vdPolyface pf = new vdPolyface(doc);
pf.CreateBox(new gPoint(0, 0, 0), 5, 5, 5, 0);//create a box (5x5x5) size
doc.Model.Entities.AddItem(pf);
createAlignToViewEntities(); //fill the collections with the alignet to view texts
doc.RenderMode = vdRender.Mode.Shade;
doc.ZoomExtents();
doc.Redraw(false);
2. Create a collection of vdTexts that are align to view in each vertex of the box
void createAlignToViewEntities()
{
if (drawafterentities.Count > 0) return;
drawafterentities.SetUnRegisterDocument(doc);
//create a vdText foreach vertex of a box (5x5x5)
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(0, 0, 0), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10 ,PenColor = new vdColor(Color.Red)});
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(5, 0, 0), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(5, 5, 0), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(0, 5, 0), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(0, 0, 5), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(5, 0, 5), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(5, 5, 5), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
drawafterentities.AddItem(new vdText(doc, "VectorDraw", new gPoint(0, 5, 5), 1.0, VdConstHorJust.VdTextHorCenter, VdConstVerJust.VdTextVerCen, doc.TextStyles.Standard) { AlignToView = true, AlignToViewSize = 10, PenColor = new vdColor(Color.Red) });
}
3. Override the OnDrawAfter event
vdDOcument doc;
....
doc.OnDrawAfter += Doc_OnDrawAfter;
vdEntities drawafterentities = new vdEntities(); // this the the collection of texts that will be rendered "on - top" of the model entities
private void Doc_OnDrawAfter( object sender, vdRender render)
{
IvdOpenGLRender glrender = render.OpenGLRender;
if (glrender != null) glrender.Flush(-1);//finishing draw all existing primitives in the buffer in case of 3d rendering views
bool oldenabledepth = render.EnableDepthBuffer(false);//disable depth buffer comparison
bool oldenabledepthwrite = render.EnableDepthBufferWrite(false);//disable write to depth buffer
foreach (vdFigure item in drawafterentities)
{
item.Draw(render);
}
//restore depth buffer values
render.EnableDepthBuffer(oldenabledepth);
render.EnableDepthBufferWrite(oldenabledepthwrite);
}