Set Xray in GetVirtualObjects()

RenatoT

Hi all, i'm trying to generate an XRAY pyramid inside the GetVirtualObjects() without luck.
Here my source code:

		BaseObject* pyramid = BaseObject::Alloc(Ocone);
		if (pyramid) {
			BaseContainer* cone_bc = pyramid->GetDataInstance();
			const Float pyra_height = 0.75;
			const Vector v1 = Vector(0.0, 1.0, 0.0);
			const Vector v2 = Vector(1.0, 0.0, 0.0);
			const Vector v3 = Vector(0.0, 0.0, 1.0);
			const Vector center = bot_pos + Vector(0.0, pyra_height, 0.0);

			const Matrix mg = Matrix(center, v2, v1, v3);
			pyramid->SetMg(mg);

			cone_bc->SetFloat(PRIM_CONE_TRAD, mid_lower * supp_scale);
			cone_bc->SetFloat(PRIM_CONE_BRAD, mid_lower * 2.0 * supp_scale);
			cone_bc->SetFloat(PRIM_CONE_HEIGHT, pyra_height);
			cone_bc->SetFloat(PRIM_CONE_HSUB, 1);
			cone_bc->SetFloat(PRIM_CONE_SEG, subdivision);

			cone_bc->SetBool(PRIM_CONE_CAPS, true);
			cone_bc->SetInt32(PRIM_CONE_CSUB, 1);
			cone_bc->SetInt32(PRIM_CONE_FSUB, fstep);

			// Try to set Xray ---------------------------
			ObjectColorProperties prop;
			pyramid->GetColorProperties(&prop);
			prop.xray = true;
			pyramid->SetColorProperties(&prop);
			pyramid->SetParameter(ID_BASEOBJECT_XRAY, GeData(TRUE), DESCFLAGS_SET_0);
			pyramid->Message(MSG_UPDATE); 

			// Try also with Container -------------------
			cone_bc->SetBool(ID_BASEOBJECT_XRAY, true);
			
			doc->InsertObject(pyramid, ret, nullptr);
		}

Thanks in advance
Renato T.

Cairyn

I just checked with a Python generator, and it works, so at least it is not a general problem in virtual objects

def main():
    pyramid = c4d.BaseObject(c4d.Ocone)
    if pyramid == None: return None
    pyramid[c4d.PRIM_CONE_SEG] = 4
    pyramid[c4d.ID_BASEOBJECT_XRAY] = True

    return pyramid

(but maybe I don't get your code; why are you inserting the object into the doc instead of returning it? I may be looking for the wrong context here)

RenatoT

Thanks Cairyn for the test.

Yes, is a right question ... let me check.

RenatoT

Ok, I miss to use OBJECT_USECACHECOLOR. I found it on this older post:
https://developers.maxon.net/forum/topic/6674/7275_setting-xray-for-virtual-objects/8

r_gigante

Hi @RenatoT thanks for reaching out us.

By looking at the code it's clear that your intent is to change the visual appearance of a portion of the cache and this can only be done registering the ObjectData with OBJECT_USECACHECOLOR. This, at the same time, comes with the drawback that the user can't change anything about the visual appearance of the object from AM.

Different could be to set the ID_BASEOBJECT_XRAYparameter's value intercepting the MSG_MENUPREPARE but in this case, while the user retains the option to change the visual appearance, the whole geometry of the cache is affected.

	def GetVirtualObjects(self, op, hh):
		res = c4d.BaseObject(c4d.Osphere)
		if res is not None:
			pyramid = c4d.BaseObject(c4d.Ocone)
			if pyramid is not None:
				pyramid.InsertUnder(res)

		return c4d.BaseObject(c4d.Onull)

	def Message(self, node, type, data):
		if type==c4d.MSG_MENUPREPARE:
			node[c4d.ID_BASEOBJECT_XRAY] = True
		return True

Last but not least, be aware that you're misusing the BaseDocument::InsertObject(): for the scope of inserting the pyramid under the object returned by the ObjectData::GetVirtualObjects() it's more appropriate to use GeListNode::InsertUnder()

Cheers, R

RenatoT

Thanks R, the insert was an error, i already corrected. OBJECT_USECACHECOLOR work as expected

Cheers
Renato