I have completed my 3ds scene rednering a few weeks before.  Below picture show it..

I could perfectly handle almost all 3ds related information and transparency. Now i have plan to do ray tracing to produce good quality image .

[ Thanks to artist-3d.com and max-realsms for their models ]

 

 

 

A few months back i decided to study calculas. I don't want to solve equations. But understanding the concept like infinitily small things  and how we can use that in practical purposes. I got a book , which explains very basically the concepts..

 

As a start of the study i decided to find the area of circle. Everyone knows it .. It is Pi *  r ^2.

How it came ? Old people know it . Old indian mathematicians , egyptions all know that..  But calculas is developed after that.. By Sir Newtorn & Sir Lebnitz.

 

I decided to use caluclas to find the area of circle.

We know the cirlcle can be divided in to many triangles see the follwing picture

 

 

you can see that a cirlcle containing a triangle. Suppose if we could divide the circle with very small tiny ! triangle , the area will be

equal to that of the sum of all area of the triangles.

 

Okay this is how Infinitely small items can be useful for practical purpose.

 

Here the area of the one Infinitely small triangle is this ( based on radius r )

 

 

 

 

STL vector is nice class , which allows us to randomly access any location in the vector.

But if you use pointers to reference memory inside the vector , it can be dangerous depends upon the situation.

 

Consider this example, I have declared a std::vector object for storing some objects of "SomeClass".

 

std::vector<SomeClass> Objects;

 

// i am feeding the vector here... like Objects.push_back( .. )

 

After feeding the vector i just took the address of first object in the vector.

like SomeClass* pThink = &Objects[0];

 

This is fine and has no problems at all. But the problems will come if you keep feeding the vector or removing elements .. Because std::vector will always reorganizing memory .It make sure that the memory allocated for objects will be continous.

 

So if we refer the pointer 'pThink' after push/ remove functions , it can cause expcetion similar to pointing incorrect memory location etc.