How do you get animation data for diffuse color ?

[bcrooz]

Hi,

I have a fbx file with a model and material diffuse color animation.

If I load the file up in Maya, I can press the animation play button and see the material color animating. The model changes 5 colors.

The fbx is in binary and also in ascii format so I can look at the contents.

If I look at the ascii version, I can see that there is 1 AnimCuveNode for DiffuseColor

AnimationCurveNode: 930025792, "AnimCurveNode::DiffuseColor", "" {
        Properties70:  {
            P: "d|X", "Number", "", "A",0.363935500383377
            P: "d|Y", "Number", "", "A",0.0674999952316284
            P: "d|Z", "Number", "", "A",0.5
        }
    }

This is the data for the first color, however I don't see any data anywhere that represents the remaining 4 colors.

How do you get animation data for the material diffuse color ?

Are there keyframes for it ?

Could somone provide a code sample ?

[bcrooz]

Hi,

I have a fbx file with a model and material diffuse color animation.

If I load the file up in Maya, I can press the animation play button and see the material color animating. The model changes 5 colors.

The fbx is in binary and also in ascii format so I can look at the contents.

If I look at the ascii version, I can see that there is 1 AnimCuveNode for DiffuseColor

AnimationCurveNode: 930025792, "AnimCurveNode::DiffuseColor", "" {
        Properties70:  {
            P: "d|X", "Number", "", "A",0.363935500383377
            P: "d|Y", "Number", "", "A",0.0674999952316284
            P: "d|Z", "Number", "", "A",0.5
        }
    }

This is the data for the first color, however I don't see any data anywhere that represents the remaining 4 colors.

How do you get animation data for the material diffuse color ?

Are there keyframes for it ?

Could somone provide a code sample ?

[bcrooz · Accepted solution]

The following is an example that is performed in an fbx sdk extension plugin at export time, from Maya.

void MayaExt_ExportEnd(FbxScene* pFbxScene)

{

    //First you have to get the Mesh Node. You can recursively loop through all the children of the FbxScene's root node.

    <implement recursive node search function here>

    //Look for a node with the attribute FbxNodeAttribute::eMesh.

    FbxNode pMeshNode;

    FbxNodeAttribute* pNodeAttribute = pNode->GetNodeAttribute();

    if(pNodeAttribute != NULL)
    {
        FbxNodeAttribute::EType currentNodeAttributeType = pNodeAttribute->GetAttributeType();
        if(currentNodeAttributeType == FbxNodeAttribute::eMesh){
            pMeshNode = pNode;
        }
    }

    //After you get that, you can get the material if it has one:

    FbxSurfaceMaterial *pMaterial = pMeshNode->GetMaterial(materialIndex);

    //Then you can access the Diffuse property:

    FbxProperty diffuseProp = pMaterial->FindProperty(FbxSurfaceMaterial::sDiffuse);
    if( diffuseProp.IsValid() )

    {

         //Then you can get the animation curve node:

         FbxAnimCurveNode* animcurvenode = diffuseProp.GetCurveNode();

         int redChannel    = 0U;
         int greenChannel = 1U;
         int blueChannel   = 2U;
         int alphaChannel = 3U;

         //Then you can get the animation curve for each color channel:

         int numCurveRed = animcurvenode->GetCurveCount(redChannel);

         for(i = 0; i < numCurveRed; i++){
              FbxAnimCurve* animCurveRed animcurvenode->GetCurve(redChannel, i);

              //...grab the animation key times and values from the curve

         }