[gl4java-usergroup] Objects flashing when mouse clicked?

[<dom...@so...>]

Hi there, 

In my program I render the same model, loaded from an .obj file, several 
times with different transformations. I also have a sky box (six quads with 
texture) and a floor plane (one quad with texture) rendered afterwards. 

In the rendering loop, I first use a for loop to render the copies of model 
in different location by glTranslatef, and different scale by glScalef. 
Afterwards, the floor plane and skybox are rendered. 

The scene is rendered without any problem, and I could move through the 
scene smoothly (I use glTranslatef and glRotatef to do this). The problem 
comes when I click the mouse button -- when releasing the button, part of 
the objects (but not all of them) flashes, while the floor plane and skybox 
remain still (I never found them flash). The flash doesn't occur everytime, 
but is quite frequent. 

I've read some old posts here, and try to follow the suggestions such as 
implementing the mouse listener and leaving the click event blank, but the 
problem presists. Even setting mouse listener to null doesn't help. (Note: I 
have the mouse listener seperated as another class, but not in 
GLAnimCanvas.) 

And when I look into my code, I found something interesting -- if I comment 
out the glScalef line, everything goes well! Or, if I unroll the for loop by 
hand, the frequency of flashing will be greatly reduced. Unrolling the loop 
is not feasible, since I would have unknown number of objects, but I wonder 
if glScalef is the real trouble maker. 

Do anyone got idea on this? Thanks. 

Dominic Kwan 

PS. Sorry for poor English...