Kenneth Newby

Hello community, I'm using the tex_scale_x, tex_scale_y, tex_offset_x and tex_offset_y messages to jit.gl.videoplane to view portions of an incoming image as a texture. I need to be able to apply a mask to a number of these videoplanes to control the shapes of the final images. If I add a mask to the alpha channel of the incoming image it gets scaled and offset with the rest of the image. Is there a way to mask the videoplane image independently of these scalings and offsets? For instance, is it possible to grab the altered texture from the videoplane, add a mask and apply this to a second videoplane.

Hello community,  I'm using the tex_scale_x, tex_scale_y, tex_offset_x and tex_offset_y messages to jit.gl.videoplane to view portions of an incoming image as a texture.  I need to be able to apply a mask to a number of these videoplanes to control the shapes of the final images.  If I add a mask to the alpha channel of the incoming image it gets scaled and offset with the rest of the image.  Is there a way to mask the videoplane image independently of these scalings and offsets?   For instance, is it possible to grab the altered texture from the videoplane, add a mask and apply this to a second videoplane.  

videoplane-masking-challenge

I answered my own question, using td.rota.jxs and a composite shader.

But... it's VERY SLOWWWWW.... arghh... does anyone know of an efficient way to apply a mask to the contents of a videoplane AFTER its' been scaled and offset. I need the mask to remain constant on the plane and see the masked image sliding underneath.

But... it's VERY SLOWWWWW.... arghh... does anyone know of an efficient way to apply a mask to the contents of a videoplane AFTER its' been scaled and offset.  I need the mask to remain constant on the plane and see the masked image sliding underneath.

Post a patch, maybe people here will help optimize it.

videoplane masking challenge