Hajjbaby

I have created a large 5-sided cube (with a 6th, front side to be added) out of 5 flattened cubes from jit.gl.gridshape objects, and have placed a sphere inside which bounces about, reporting collisions with each face of the cube as it hits them. I am attempting to make each face transparent so that the sphere inside can be seen, but when it hits a face, I wanted that face to flash a certain colour, then return to being transparent.

I have managed to work out the collision reporting, but I am stuck on this one transparency issue. I have searched about the forums and the only thing I've found is how to make a whole cube from one jit.gl.gridshape object transparent, which isn't what I'm after as I would want to trigger each face separately. Basically just need some idea on how to make a flattened cube shape transparent so that the black areas are see-through, but colours become visible when collisions occur.

I have posted the patch, hope it's okay to read. Thanks in advance for any assistance given!

I have created a large 5-sided cube (with a 6th, front side to be added) out of 5 flattened cubes from jit.gl.gridshape objects, and have placed a sphere inside which bounces about, reporting collisions with each face of the cube as it hits them. I am attempting to make each face transparent so that the sphere inside can be seen, but when it hits a face, I wanted that face to flash a certain colour, then return to being transparent. 

I have managed to work out the collision reporting, but I am stuck on this one transparency issue. I have searched about the forums and the only thing I've found is how to make a whole cube from one jit.gl.gridshape object transparent, which isn't what I'm after as I would want to trigger each face separately. Basically just need some idea on how to make a flattened cube shape transparent so that the black areas are see-through, but colours become visible when collisions occur. 

I have posted the patch, hope it's okay to read. Thanks in advance for any assistance given!


transparency-issue-with-jit-gl-gridshape

for transparent objects, you must set @depth_enable 0 @blend_enable 1.

you then want to make all the transparent objects draw last, by setting @layer to some high value (eg 100)

you can then control transparency with the alpha value of the the color attribute.

you probably don't want to attach a jit.gl.material to your transparent objects, because that complicates things and is probably unnecessary.

i would also use jit.gl.gridshape @shape plane instead of cube for your walls, however if you need to use cube, i would turn on back-face culling (@cull_face 1).

try those things out, and let us know if you still can't get it working.

for transparent objects, you must set @depth_enable 0 @blend_enable 1.
you then want to make all the transparent objects draw last, by setting @layer to some high value (eg 100)

you can then control transparency with the alpha value of the the color attribute.
you probably don't want to attach a jit.gl.material to your transparent objects, because that complicates things and is probably unnecessary.

try those things out, and let us know if you still can't get it working.


Awesome, it works! Made the changes you suggested as well as trying out different blend modes which was suggested by somebody in my post to the wrong (Max/MSP) forum, combining the two solved the issue!

Transparency issue with jit.gl.gridshape