Before asking a question, I ask you to excuse me
about using POOR English.
I learned English, but I'm not good at English.
I learned that computer determines whether a point will
be drawn or not.(By using z buffer)
But, I want to know a information about it.
I'm making a simulator, and to make it, I should
know whether a point is located inside
3d-objects(with arbitrary shapes) , or not.
To know it, I decided to use OpenGL. I thought that
if I draw a object and a point, then I can know the information
about position relationship between a objects, and a point.
But, after I succeed to draw it, I realize that there is no
function that give the information that I want to know.
Is there a algorithm, or method to know it?
Thanks for any advice.