CustomData converted to GeData

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On 29/10/2012 at 15:02, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   13 
Platform:    Mac  ;  
Language(s) :     C++  ;

---------
Hello all.

I've got a question that seems really noobish, but I can't figure out how to do it.  I'm making a material with a proximal shader, and I want to add the objects that are created in a loop to the object field of it.

  
BaseMaterial *mat = BaseMaterial::Alloc(Mmaterial);  
BaseShader *shader;  
InExcludeData *inex;  
    
//Loop stuff  
 inex->InsertObject(obj, NULL);// the new object to the inexclude  
//Loop stuff ends  
  
GeData gedataInexclude;  //here's where I'm having trouble I need to convert an Inexclude to a GeData and I can't figure it out.   
  
shader->SetParameter(1015, gedataInexclude, DESCFLAGS_SET_PARAM_SET);//SLA_PROXIMAL_OBJECTS I know I shouldn't do this part like this my my project won't load the res file  
    
mat->SetParameter(MATERIAL_ALPHA_SHADER,shader,DESCFLAGS_SET_PARAM_SET);  
mat->InsertShader(shader, NULL);   
doc->InsertMaterial(mat);  

So I'm stuck on converting the Inexclude to the GeData so I can use it in the SetParameter.  Here's what I've been trying to use:

  
GeData* gedataInexclude;  
gedataInexclude->SetCustomDataType(inex,CUSTOMDATATYPE_INEXCLUDE_LIST);  

I keep getting errors that there's npo matching function calls and such.  I think the problem is I don't understand what SetCustomDataType is looking for.

Any help would be great, thanks in advance!
Dan

(edit: fixed typo in title)

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On 30/10/2012 at 02:42, xxxxxxxx wrote:

Originally posted by xxxxxxxx

 
GeData* gedataInexclude;  
gedataInexclude->SetCustomDataType(inex,CUSTOMDATATYPE_INEXCLUDE_LIST);  

I think you should just swap the 2 parameters of calling SetCustomDataType(). The custom data type ID is expected first, then the custom data value.

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On 30/10/2012 at 09:24, xxxxxxxx wrote:

Hi Yannick, thanks for the help, but that didn't work.

I switch it from :

  
InExcludeData *inex2;  
GeData *gedataInexclude;  //here's where I'm having trouble I need to convert an Inexclude to a  GeData and I can't figure it out.   
gedataInexclude->SetCustomDataType(inex2 , CUSTOMDATATYPE_INEXCLUDE_LIST);  
    

To:

  
InExcludeData *inex2;  
GeData *gedataInexclude;  //here's where I'm having trouble I need to convert an Inexclude to a GeData and I can't figure it out.   
gedataInexclude->SetCustomDataType(CUSTOMDATATYPE_INEXCLUDE_LIST,inex2);  
    

And I'm getting this error. " error: no matching function for call to 'GeData::SetCustomDataType(int, InExcludeData*&)'note: candidates are: void GeData::SetCustomDataType(LONG, const CustomDataType&)"

Do I need to covert  inex2 from and InExcludeData to a CustomDataType or something?  I've tried that ways I know of and those haven't worked.

Thanks for the help.
Dan

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On 30/10/2012 at 10:13, xxxxxxxx wrote:

Hi Dan,

CustomDataType is a parent class of InExcludeData but SetCustomDataType() expects a const value so we have to explicitly cast it.
See the trick here: https://developers.maxon.net/forum/topic/4438/4102_problem-by-saving-data&PID=16747#16747

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On 30/10/2012 at 12:14, xxxxxxxx wrote:

Thanks again, Yannick!  I thought I had tried that already but I guess not.  One more question if it's not to much trouble.  Now that I've assigned the inexclude to the shader I need to assign the shader to the material.

I saw Scott's thread about it here, https://developers.maxon.net/forum/topic/5689/5725_how-to-get-at-shader-options  But he uses the basecontainer to set the parameter and we aren't supposed to do that now correct?  So how would it be done with SetParameter?  It's not a CustomDataType, I think, so it can't be done the same way as the Inexclude, right?

Dan

Edit:  In a related but separate topic, I have a Link description element and I'm trying to get the object out of it.  My current code:

  
  GeData objtemp;  
  op->GetParameter(DescLevel(LINKER), objtemp,  DESCFLAGS_GET_PARAM_GET);  
  BaseObject* obj = (BaseObject* )objtemp.GetLink(GetActiveDocument());  

This code does cause a crash but it always returns NULL regardless of if there's an object in the link field or not.  Thanks for any possible help.

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On 31/10/2012 at 02:57, xxxxxxxx wrote:

I think you should call GetParameter() with DESCFLAGS_GET_0 instead of DESCFLAGS_GET_PARAM_GET.

Originally posted by xxxxxxxx

One more question if it's not to much trouble.  Now that I've assigned the inexclude to the shader I need to assign the shader to the material.

I saw Scott's thread about it here, https://developers.maxon.net/forum/topic/5689/5725_how-to-get-at-shader-options  But he uses the basecontainer to set the parameter and we aren't supposed to do that now correct?  So how would it be done with SetParameter?  It's not a CustomDataType, I think, so it can't be done the same way as the Inexclude, right?

I don't understand, what do you want to do?

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On 31/10/2012 at 09:06, xxxxxxxx wrote:

Thanks Yannick, that worked perfectly.

Sorry about being unclear.  I want to assign a shader to the texture field of a material, specifically around the Alpha channel.  In that thread Scott does it like this:

  
    
    
      BaseContainer *data = mat->GetDataInstance(); // Get the material's container    
      BaseShader *shd = BaseShader::Alloc(Xsimplenoise); // Creates simple noise instance....For other types(fresnel,etc..). Look up  "enum Xbase"  in the SDK    
      if(!shd) return FALSE;  
        
      data->SetLink(MATERIAL_COLOR_SHADER, shd); // Adds simple noise to the color channel in memory only    
    

But isn't using the base container to modify and object bad form?    Here's my current code:

  
  
  shader->SetParameter(1015, tempinex, DESCFLAGS_SET_0);//SLA_PROXIMAL_OBJECTS  
  //Something here to convert a baseshader to gedata  
  mat->SetParameter(MATERIAL_ALPHA_SHADER,gedatashader,DESCFLAGS_SET_0);  

It's not a CustomDataType and GeData doesn't have a method for converting it so I'm rather lost right now.

Thanks!
Dan

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On 01/11/2012 at 02:20, xxxxxxxx wrote:

Hi Dan,

Material channel's shader are shader link. You can see in Scott's code that he calls SetLink() to set the container value.
So we have to construct the GeData with a BaseLink.

Here's how I would create and assign a noise shader to the alpha channel's shader of a material:

BaseShader *shd = BaseShader::Alloc(Xsimplenoise);
if (!shd) return FALSE;
  
BaseMaterial *mat = doc->GetFirstMaterial();
if (!mat) return FALSE;
  
AutoAlloc<BaseLink> link;
GeData data;
  
link->SetLink(shd);
data.SetBaseLink(link);
  
if (mat->SetParameter(MATERIAL_ALPHA_SHADER, data, DESCFLAGS_SET_0))
{
    mat->InsertShader(shd, NULL);
    mat->Message(MSG_UPDATE);
    mat->Update(TRUE, TRUE);
  
    EventAdd();
}

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On 02/11/2012 at 09:39, xxxxxxxx wrote:

Would one of you guys please post the code to load an object into the proximal's object list?
I tried to use the casting code on that link Yannick posted. But I can't get it right.

Here's a code example that will create a new material with a proximal shader in the color channel.
Everything works except the part where I'm trying to load the first object in the OM into the proximal's object list.

#include "..\..\..\..\resource\modules\sla\res\description\xslaproximal.h"  
#include "customgui_inexclude.h"  
  
  
  
  BaseMaterial *mat = BaseMaterial::Alloc(Mmaterial); //Generate a new material and assign a variable to it   
  if(!mat) return TRUE;                               //Error handling  
    
  BaseContainer *data = mat->GetDataInstance();      //Get the material's container    
  BaseShader *shd = BaseShader::Alloc(Xproximal);    //Creates a proximal instance. Look up "Enum Xbase" in the SDK for others  
  if(!shd) return FALSE;    
  
  data->SetLink(MATERIAL_COLOR_SHADER, shd);         //Adds proximal the color channel in memory only  
  mat->InsertShader(shd, NULL);                      //Inserts the shader into the material's color channel from memory  
  doc->InsertMaterial(mat);                          //Adds the new material to the material Manager from memory  
  
  ((Material* )mat)->SetChannelState(CHANNEL_COLOR, TRUE); //Enables the channel..not usually needed for the color channel  
  
  // This section changes the proximal's attributes  
  GeData d;                                                                          //A container that holds the data gotten from GetParameter() below  
  shd->GetParameter(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS), d, DESCFLAGS_GET_0); //Get the Include SubObjects attribute and store the value in "d"  
  
  shd->SetParameter(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS), TRUE, DESCFLAGS_SET_0); //Enable Include Subobjects option  
  
  
///////////////////////////////////// This part is wrong and crashes C4D! //////////////////////////////////////////////////  
  
  BaseObject *obj  = doc->GetFirstObject();           //The object that will be put into the proximal's InExclude list  
  if(!obj) return FALSE;  
  InExcludeData *objList = (InExcludeData* )data->GetCustomDataType(SLA_PROXIMAL_OBJECTS, CUSTOMDATATYPE_INEXCLUDE_LIST);// <---- Wrong!!  
  objList->InsertObject(obj, DESCFLAGS_SET_0);  
  
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////  
  
  
  shd->Message(MSG_UPDATE);    //Update the shader changes  
  EventAdd();  
  mat->Message(MSG_UPDATE);    //Update the material changes  
  mat->Update(TRUE, TRUE);     //Update the material's icon

Thanks,
-ScottA

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On 05/11/2012 at 06:15, xxxxxxxx wrote:

Hi Scott,

In yourcode, data  is the material's container, not Proximal shader's container.
We have also to carefully build the description IDs to get the parameters: you're not setting SLA_PROXIMAL_INCLUDE_SUBOBJECTS as expected.

Using GetParameter()/SetParameter() is the way to go to access, modify then assign in/exclude lists:

GeData d;
DescID id;
id = DescID(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS, DTYPE_BOOL, 0));
  
shd->SetParameter(id, TRUE, DESCFLAGS_SET_0); // Enable Include Subobjects option
  
BaseObject *obj  = doc->GetFirstObject();
if (!obj) return FALSE;
  
id = DescID(DescLevel(SLA_PROXIMAL_OBJECTS, CUSTOMDATATYPE_INEXCLUDE_LIST, 0));
if (shd->GetParameter(id, d, DESCFLAGS_GET_0)) // Get proximal objects list
{
    InExcludeData * objList = (InExcludeData* )d.GetCustomDataType(CUSTOMDATATYPE_INEXCLUDE_LIST);
    if (!objList) return FALSE;
    objList->InsertObject(obj, 0);
    shd->SetParameter(id, d, DESCFLAGS_SET_0); // Set the modified objects list back into the parameters
}

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On 05/11/2012 at 09:54, xxxxxxxx wrote:

Thank You Yannick. 

In case anyone needs it.
Here's a working example of using a GeDialog plugin to create a new material with a proximal shader in the color channel.
Then it loads the selected object into the proximal's In/Ex list:

#include "..\..\..\..\resource\modules\sla\res\description\xslaproximal.h"  
#include "customgui_inexclude.h"  
  
  
  BaseObject *obj  = doc->GetActiveObject();         //The object we will automatically add to the proximal's In/Ex list  
  if (!obj) return FALSE;                            //If no object is selected..There's no point in making a new material..So we end it all right here  
  
  BaseMaterial *mat = BaseMaterial::Alloc(Mmaterial);//Generate a new material and assign a variable to it   
  if(!mat) return TRUE;                              //Error handling  
    
  BaseContainer *data = mat->GetDataInstance();      //Get the material's container    
  BaseShader *shd = BaseShader::Alloc(Xproximal);    //Creates a proximal instance. Look up "Enum Xbase" in the SDK for others  
  if(!shd) return FALSE;    
  
  data->SetLink(MATERIAL_COLOR_SHADER, shd);         //Adds proximal the color channel in memory only  
  mat->InsertShader(shd, NULL);                      //Inserts the shader into the material's color channel from memory  
  doc->InsertMaterial(mat);                          //Adds the new material to the material Manager from memory  
  
  ((Material* )mat)->SetChannelState(CHANNEL_COLOR, TRUE); //Enables the channel..not usually needed for the color channel  
  
  GeData d;                                          //A container similar to a BaseContainer  
  DescriptionCommand dc;                             //In/Ex lists are a descriptions. So we need to store it in this type of variable  
  //DescID id;                                       //Only needed if "id" is not already included in the Command() function's parameters  
  
  //Alternative way to enable some of the non-description based options inside the proximal shader's attributes  
  //shd->GetParameter(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS), d, DESCFLAGS_GET_0);   //Get the Include SubObjects attribute and store the value in "d"  
  //shd->SetParameter(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS), TRUE, DESCFLAGS_SET_0);//Enable Include Subobjects option  
   
  dc.id = DescID(DescLevel(SLA_PROXIMAL_INCLUDE_SUBOBJECTS, DTYPE_BOOL, 0));             //Get the "Include SubObjects" attribute and store the value in "dc.id" variable  
  shd->SetParameter(dc.id, TRUE, DESCFLAGS_SET_0);                                       //Enable Include SubObjects option  
  
  dc.id = DescID(DescLevel(SLA_PROXIMAL_OBJECTS, CUSTOMDATATYPE_INEXCLUDE_LIST, 0));     //Get proximal object's list of objects and store it in the dc.id variable  
  if (shd->GetParameter(dc.id, d, DESCFLAGS_GET_0))                                      //If the list exists<---Just for error checking  
  {  
      //GePrint("Found the Object List");  
      InExcludeData *objList = (InExcludeData* )d.GetCustomDataType(CUSTOMDATATYPE_INEXCLUDE_LIST); //Create an In/Ex list variable and store it in the "d" container  
      if (!objList) return FALSE;  
  
      objList->InsertObject(obj, 0);                                                    //Insert the object into the proximal's In/Ex list  
      shd->SetParameter(dc.id, d, DESCFLAGS_SET_0);                                     //Update the modified parameters  
      LONG count = objList->GetObjectCount();                                           //Get the number of object's in the In/Ex list  
      GePrint(LongToString(count));  
  }  
  
  shd->Message(MSG_UPDATE);            //Update the changes made to the shader  
  mat->Message(MSG_UPDATE);            //Update the changes made to the material  
  mat->Update(TRUE, TRUE);             //Refresh the materials displayed icon  
  EventAdd();

-ScottA

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On 08/11/2012 at 11:01, xxxxxxxx wrote:

Thanks a ton for all the help both of you!   I'd post my finished code, but Scott showed it so much better then I could. 

Thanks!
Dan