Casper Leerink

I am working on a jitter patch where I need to zoom in on a portion of a large image. This image is around 9500 by 1080 pixels. Currently I am loading the image into a jit.gl.texture and use jit.gl.pix to zoom in and set the offset (the offset is the one that continuously changes). Because it is such a large image it takes up quite a bit of computing power, so I was wondering if there is a more efficient way to do this somehow? (still new to jitter and gl)

This is my current patch, the magic happens within the panorama sub-patch, outside is to control the offset.

loadbang

flonum

message

inlet

route

outlet

sprintf

jit.gl.pix

norm

sample

param

jit.gl.texture

toggle

pack

line

number

Hi everyone!
I am working on a jitter patch where I need to zoom in on a portion of a large image. This image is around 9500 by 1080 pixels.

efficiently-showing-portion-of-large-image

Hi, Casper. I think you would have much better performance if you associated the texture to a 2D plane or 3D geometry (cylinder or sphere, depending on the type of panorama), and used the GL camera to focus (move, rotate) on the intended portion of the image.

Another optimization trick is to configure the jit.gl.texture with @automatic 0. As the texture is static, it doesn't need to be updated every frame and, with large images like these, I think it might make a substantial difference.

Hi, Casper. I think you would have much better performance if you associated the texture to a 2D plane or 3D geometry (cylinder or sphere, depending on the type of panorama), and used the GL camera to focus (move, rotate) on the intended portion of the image.
Another optimization trick is to configure the jit.gl.texture with @automatic 0. As the texture is static, it doesn't need to be updated every frame and, with large images like these, I think it might make a substantial difference.

Thank you Pedro! @automatic 0 is a quick fix! For the 2d plane, I am still figuring out how this works precisely, I also need the image to wrap around, so the right side of the image is connected to the left side of the same image, this is to create a continuous image that never ends in a way. Could I use a cylinder shape for this?

Efficiently showing portion of large image