rtech

I've been wondering if there is some standard default for where to position the camera to have all the dimensions of single image on a plane line up in 3-D coordinate space. I noticed in the jit.gl.videoplane help file, the camera is set defualt to z = 4 and x, y to 0. This seems to line up an image place on the videoplane with the original dimensions of the image. But 4 seems like an arbitrary number.

Does anyone know the science behind this magic number 4 for z-axis position of the camera?

I've been wondering if there is some standard default for where to position the camera to have all the dimensions of  single image on a plane line up in 3-D coordinate space.  I noticed in the jit.gl.videoplane help file, the camera is set defualt to z = 4 and x, y to 0.  This seems to line up an image place on the videoplane with the original dimensions of the image.  But 4 seems like an arbitrary number.  

Does anyone know the science behind this magic number 4 for z-axis position of  the camera?


cameras-z-position-to-have-original-image-dimensions-line-up

I don't know if that's exactly what you're asking but if I understood correctly, transform_reset 2 attribute on the jit.gl.videoplane should be useful.

Camera's Z-position to have original image dimensions line up?