Scaling a mounted ShapeBaseImage

To be able to set your weapon's scale without having to re-export it, do the following:

First, in shapeBase.h find (in the ShapeBaseImageData struct)

/// Maximum number of sounds this image can play at a time.
   /// Any value <= 0 indicates that it can play an infinite number of sounds.
   S32 maxConcurrentSounds;

and after that insert:

// >>>
   // custom mounted image scaling
   Point3F scale;
   // <<<

Next, in shapeImage.cpp, add to the ShapeBaseImageData constructor:

// >>>
   scale = Point3F(1,1,1);
   // <<<

Still in the same file, find ShapeBaseImageData::initPersistFields() and add at the end of the method:

// >>>
   addField("scale", TypePoint3F, Offset(scale, ShapeBaseImageData));
   // <<<

In the ShapeBaseImageData::packData method, add at the end:

// >>>
   mathWrite( *stream, scale );
   // <<<

In the ShapeBaseImageData::unpackData method, add at the end:

// >>>
   mathRead( *stream, &scale );
   // <<<

In shapeBase.cpp's ShapeBase::prepBatchRender find the following:

MatrixF mat;
         getRenderImageTransform(mountedImageIndex, &mat, state->isShadowPass());
         GFX->setWorldMatrix( mat );

         image.shapeInstance->animate();
         image.shapeInstance->render( rdata );

and replace with this:

MatrixF mat;
         getRenderImageTransform(mountedImageIndex, &mat, state->isShadowPass());
         GFX->setWorldMatrix( mat );

         image.shapeInstance->animate();
         // >>>
         MatrixF s(true);
         s.scale( image.dataBlock->scale );
         GFX->multWorld( s );
         // <<<
         image.shapeInstance->render( rdata );

Finally, some scripting: in your weapon's (or any other mounted image's) ShapeBaseImageData datablock, add a scale property (defaults to Point3F(1,1,1) if not set, which means no further scaling) and set it's value to the desired scale.

You're done, now you can scale any of your mounted objects. Tested only in Torque3D.

Update (07/30/2009): Updated the resource to make it networked.
Update (09/25/2009): Updated code to reflect changes to a getRenderImageTransform call from Beta 5.
Update (01/30/2010): For T3D 1.0.1, check out this post by Eikon Games.


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