Those tutorials are great, but all are between 27th September 2008 and 20th October 2008. Today is 18th November. In what time will you make next tutorials? Thank you for those 14.

Is there any solution if my tiles are not of the same size.How should i detect the collision?
Plz help me...............

I've never tried it myself, but off the top of my head it might be possible to simply specify different bounding boxes for the tiles. Most tiles could default to 32x32, whilst other tiles could be any dimensions you wanted.

You would then only need to come up with a way of specifying the tile sizes, which you could probably do in the same way as the images are handled: tiles number 1 - 3 are 32x32, tiles 4 and 5 could be 16x32, etc.

is there any reference code or link for the same.........

I'm afraid not. It was just what I went with off the top of my head. Unless there is a real pressing reason for wanting to use various sized tiles, it might be better to stick to one fixed size for all your tiles.

can you suggest me any physics base engine that can be useful in tile based 2D game.

None off the top of my head, I'm afraid. You might want to have a search around Google.

is there any c++ code for determining intersection point between two lines????

I don't have any code, but I'm sure a quick search on Google will turn up the code you need.

actually i want to determine the collision of player(which is rectangular) with diagonal sides of the another rectangle

I haven't work with pixel level collision before.
can anybody suggest how can I do that with transparent pixels? what exactly I want to do is, I am having two black and white images. considering white colour as a transparent. if two images intersect at black pixel then there will be the collision otherwise no collision.
so please suggest me any standard application/code that can solve my problem.

x2 = (e->x + e->dirX + e->w - 1) / TILE_SIZE;

should be

x2 = (e->x + e->dirX + e->w) / TILE_SIZE;

Because if we minus one then we get stuttering when walking directly into a tile, and when we jump over one tile and after a gap of one tile there is two tiles one on another we climb up from half of the tile to on it.

Awesome! I've been looking for a simple platform-game tutorial/example for AGES!

Bookmarked, may take me a while to get back to it but I'll certainly be going through all these. Thanks so much!