given the previous states of the glass, rotate it with angle theta. update the states of the 5 boxes that form the box: floor, left

sample params for the fluid.

Assume goal contains both image_desired_goal and any goals required for wrapped envs

Construct the passing water scence.

Construct the pouring water scence.

set the postion, velocity of flex particles, and postions of flex shapes.

set the postion, velocity of flex particles, and postions of flex shapes.

set the postion, velocity of flex particles, and postions of flex shapes.

build a table that decodes both magnitude and value of small ACs in one go.

decode image to YCbCr format

this function is designed to support animated gifs, although stb_image doesn't support it

@OPTIMIZE: store non-zigzagged during the decode passes, and only de-zigzag when dequantizing

returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow