Does anybody knows how to compute the area that currently shown from viewing position?
I want to implement the system that has canvas3d window left and right.
On the left canvas, the whole city is drawn, and we have one viewing position(camera)
which
views the view entirly at once.
On the right canvas, the scene is drawn from the small nevigation camera which is
nearer
from the land than previous camera. Moreover, we attach joystick motion input in this
window.
So, when user control joystick and navigate on the right window, I want to draw a
rectangle
or closed polygon on left window which represent the area drawn on right window.
How can I user API and what computation is needed.
I want to also know the distance from the camera and land. I'm sure there is a API in
Java3d for this operation.
Thankyou in advance.
Seagal
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