these all can be done. but much maths calculation is involved, if you don't know how to calculate distance between points, you should find someone who is good in maths, geometry, computer graphics, java programming to do this. it takes a lot to do the work, you can't learn all these in a few weeks.

Hi thanks. i don't need it, for now.
but this is something that an engine user can't(or very difficult to) get around if the situation is met, while at engine level it is easy(technically speaking) to do.
i wish JPCT engine can handle most situations (some problems can be solved by tricks without too much trouble) , but some features would require much effort from you, those are not what i would ask for , such as ortho camera.
if some features can be easily achieved from engine level, then having them would make JPCT engine better - less limitation, wider use.

i have a feeling that JPCT engine was designed and tested mostly for small scene, like indoor scene. while i mostly do open world scene. so i encounter (or fore-see) some situations that are difficult to solve, shadow bias is an example.
but i like JPCT most, and my main hobby project is made with JPCT (mostly physics simulation , with simple graphics)

i think of another question:
is a Texture fully loaded from storage when Texture is constructed or when Texture is added to TextureManager? or it's not fully loaded from storage until it's requested for render?
i mean , when a Texture is constructed, it can be just a description of the image , but without loading the actual image texels.

the reason i want that is: my coordinate system is different from JPCT system, so an object loaded from 3DS has wrong orientation and wrong lighting.
a way to solve this is i switch vectors of the vertices.
or i have to find other ways.
ps: my coord system is forward-left-up.

can the game be downloaded somewhere else except from google server? i can't download the game.
although i am not an RPG gamer, i would love to see a complete game made with JPCT engine and by the author of JPCT engine

i found that the horizontal size of the shadow is correct, but the vertical size is smaller. the wall is smaller in vertical dimension, so it seems the receiver should be square or the shadow would be deformed. is that so?

i used Shadowhelper to cast an object onto a wall, and noticed that when light is far away, the shadow was smaller than the object. is it normal? shouldn't the shadow be at least as large as the caster?