API: MRampAttribute Number of Entries

[JoshM]

Another weird thing with this is that I can add more than three entries if I create the entry via MEL. For example:

setAttr myNode.myCurveRamp[3].myCurveRamp_FloatValue 0.75;
setAttr myNode.myCurveRamp[3].myCurveRamp_Position 0.25;
setAttr myNode.myCurveRamp[3].myCurveRamp_Interp 2;


Works without any problems. I have even tried setting MFnCompoundAttribute::setIndexMatters(true), which did not work. I know there is something that I am not setting correctly but I just can't find what it is.

Thanks in advance,
Josh

[ticket01]

MFnCompoundAttribute? Could you show some code how you create the actual attribute in the initialize function? I guess you're not creating it correctly. There're the MRampAttribute::createColorRamp() or createCurveRamp() functions that you should use.

[JoshM]

Thanks for responding. Here is the code I am using for the initialize():


MStatus myDeformNode::initialize(){
//attributes for myDeformNode
...

//falloff ramp attribute
MFnCompouondAttribute cAttr;
/*MObject*/ falloffGraph = cAttr.create("falloffGraph", "fog");
cAttr.setArray(true);
cAttr.setReadable(true);

//nested position attr of falloff graph
MObject oPosition = /*MFnNumericAttribute*/ nAttr.create("falloffGraph_Position", "fogp", MFnNumericData::kFloat);
nAttr.setReadable(true);
nAttr.setWritable(true);
nAttr.setKeyable(true);

//nested value attr of falloff graph
MObject oFloatValue = nAttr.create("falloffGraph_FloatValue", "fogp", MFnNumericData::kFloat);
nAttr.setReadable(true);
nAttr.setWritable(true);
nAttr.setKeyable(true);

//nested enum attr of falloff graph
MObject oEnumValue = /*MFnEnumAttribute*/ eAttr.create("falloffGraph_Interp", "fogi");
eAttr.addField("None", 0);
eAttr.addField("Linear", 1);
eAttr.addField("Smooth", 2);
eAttr.addField("Spline", 3);
eAttr.setReadable(true);
eAttr.setWritable(true);
eAttr.setKeyable(true);

cAttr.addChild(oPosition);
cAttr.addChild(oFloatValue);
cAttr.addChild(oEnumValue);

}




After switching the code to the following:


MStatus myDeformNode::initialize(){
//attributes for myDeformNode
...

/*MObject*/ falloffGraph = MRampAttribute::createCurveRamp("falloffGraph", "fog", &stat);

}


everything is working as expected now. I can add as many entries to the ramp as I want =) Thanks for the help.

Josh

[mfiorilli]

It's weird... I've been trying your code and many more examples about the ramp attributes but in the attribute editor, it gives me a button << Add new item >> and when I click on it, it adds these inputs to the node:

Curve Ramp[0] (FLOAT) (FLOAT) (FLOAT) (garbage icon)
Curve Ramp[1] (FLOAT) (FLOAT) (FLOAT) (garbage icon)
Curve Ramp[2] (FLOAT) (FLOAT) (FLOAT) (garbage icon)
Curve Ramp[...] (FLOAT) (FLOAT) (FLOAT) (garbage icon)

it's supposed to give a ramp graphic.. not this. I don't understand.

I'm using maya 2009

[ticket01]

The feedback you get in the UI also depends on the AE Template. For a ramp attribute use:
AEaddRampControl "ATTRIBUTE_NAME";

[mfiorilli]

Thanks for the quick answer :) I'm gonna try this out.

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