Set Xray in GetVirtualObjects()



  • 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.



  • 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)



  • Thanks Cairyn for the test.

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



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



  • 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



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

    Cheers
    Renato


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