Matthew Azevedo

I'm trying to render a sphere with an equirectangular image mapped to the inside to view 360 spherical panoramas. I found an old code snipped that works, but it uses a complicated jit.expr to create the sphere. When I replace the chain of jit.expr objects with a simple jit.gl.gridshape, I still get a sphere with the right texture but for some reason the brightness is much darker. I'd rather use the jit.gl.gridshape because I understand it and I don't follow what is going on in the jit.exprs. Is there something I can do to get full brightness using jit.gl.gridshape?

comment

message

jit.gl.texture

attrui

jit.fpsgui

jit.expr

jit.gl.handle

loadbang

jit.gl.mesh

button

jit.noise

jit.window

toggle

qmetro

jit.gl.render

jit.gl.gridshape

sphere.png

I'm trying to render a sphere with an equirectangular image mapped to the inside to view 360 spherical panoramas. I found an old code snippe

photosphere-rendering

you probably also want to set @automatic 0 on the gridshape and bang it out 1 time with a loadbang, unless you plan on processing the geometry every frame.

Thanks, Rob. I had played with the alpha channel, and specifying it didn't seem to make a difference. I made the changes you suggested, and I'm still having the same issue. In comparing them, I also noticed that the panorama is flipped in my simplified version. Did I possibly change something that is causing the texture to map to the exterior instead of the interior of the sphere?

The output of the jit.expr is on the left, of my version on the right.

color_example.png

Thanks, Rob. I had played with the alpha channel, and specifying it didn't seem to make a difference. I made the changes you suggested, and I'm still having the same issue. In comparing them, I also noticed that the panorama is flipped in my simplified version. Did I possibly change something that is causing the texture to map to the exterior instead of the interior of the sphere?

The output of the jit.expr is on the left, of my version on the right.

Setting @apply to replace in the gl.texture seems to have sorted things out. Not where I was expecting to find the problem, but I am glad it is found.

Photosphere rendering