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bozorgi / VTKMultiVolumeRayCaster

A multi-volume ray casting within VTK
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Problem about multi-volume rendering #2

Open LalaChen opened 9 years ago

LalaChen commented 9 years ago

Hi,

I meet a problem when I input two volumes in your algorithm.

When I set these datas, some parts can't render on the screen. (I already move secondary data with negative z value for overlapping main data)

But It show on screen when I swap input.

The main volume is small than secondary.

(main data is 300x300x165) (second data is 300x300x300)

The main data is unsigned short.

The secondary data is float.

Thanks.

LalaChen commented 9 years ago

Hi,

After tracing your algorithm, I have a problem.

Does you transform your additional low and height bounds by additional transforms?

Thanks.

bozorgi commented 9 years ago

Hi,

This is a known issue which forces user to have the biggest volume on the first input (primary volume) ...

That is not because the bounds of additional volumes have not transformed but this is because the GLSL kernel starts and stops the rays based on the first volume size...

It would be nice If you could solve the issue :)

Best regards, Mehdi

On 09 Nov 2015, at 04:01, La-La,Chen notifications@github.com<mailto:notifications@github.com> wrote:

Hi,

After tracing your algorithm, I have a problem.

Does you transform your additional low and height bounds by additional transforms?

Thanks.

Reply to this email directly or view it on GitHubhttps://github.com/mohammeb/VTKMultiVolumeRayCaster/issues/2#issuecomment-154907132.

LalaChen commented 9 years ago

Hi, I have another question.

I try to add new volume with unsigned char type.

But I find that we always use based scalar range to do glPixelTransfer.

It cause we can't do labeling voxel by custom volume.

So if I want use this algorithm, does I need to take the volume with max pixel range and space as based volume?

Thanks.

bozorgi commented 9 years ago

Hei,

It should not be like that; as far as I recall it has not been an issue.

-Mehdi

On 10 Nov 2015, at 03:56, La-La,Chen notifications@github.com<mailto:notifications@github.com> wrote:

Hi, I have another question.

I try to add new volume with unsigned char type.

But I find we always use based scalar range to do texture pixel scaling.

Is this another issue?

Thanks.

Reply to this email directly or view it on GitHubhttps://github.com/mohammeb/VTKMultiVolumeRayCaster/issues/2#issuecomment-155267313.

LalaChen commented 9 years ago

Ok.

Maybe I mistake the situation when we input unsigned byte data into a float type based volume. I will try to trace it.

Thanks.