Orthogonal projection of 2D map.

Toni Nedi · 2012-12-21T22:02:58

Hi folks. I am using SDL for my (first)2D game attempt, I am not using OpenGL, just SDL_FillRect and SDL_BlitSurface. For my 2D game I asked a lot of people and different people recommended different things, one side recommended to stick with SDL's BlitSurface, others recommended me to do it on OpenGL even if it was 2D. I think I will stick with just SDL for now, unless it is necessary. OpenGL is too hard for me at this point, especially when it requires more code to do the same thing I do with SDL with less functions. Anyway, what I am trying to do is make my view/projection/map/whatever orthogonal, i.e I want the map to look like this game http://fortune3.to/game/ where it looks as if the map and character are viewed under an angle. Another game like that is https://s3.amazonaws...ld22/index.html. My map is tile-based right now, I use these sheets http://i.imgur.com/4cURq.png. The red,green and..not sure what the other color is, square are what I walk on, the other things are the walls. For my character I use these http://i.imgur.com/sUAE4.png Nothing fancy, at all. I just found them randomly and google, and decided to use them. When you mash that, it looks like this http://i.imgur.com/LlPCt.png. The tiles it feels as if I am looking from above, but the character as if I am looking from the side. What I want it to look like is the games I showed you, not the same textures obviously, but I hope you got the point. But I have no idea whether a code change is needed, or the sprites need to be changed, or both. Now, let me say this, the programming language I am using is C, because I have over a year experience with it, whereas C++ or say C# I have none, plus I don't like them, so using some game library/game engine which is written in C++ is not on my agenda(It's possible to mix C and C++, but you get why I don't want to use it). Actually, I want to write my own engine, just for myself of course, so I can use it for other projects. If possible, spare me the talk how C++ is better .

For Beginners

Started by farmdve December 16, 2012 03:59 PM

12 comments, last by dAND3h 11 years, 4 months ago

nobodynews

3,128

December 18, 2012 11:07 PM

The sprites you have probably assumed the game would 'flip' the sprites horizontally at runtime. Left is can be seen as the same as right, just mirror image opposites. Another option is to flip the sprites in an image editor. Even MS Paint has a flip option.

C++: A Dialog | C++0x Features: Part1 (lambdas, auto, static_assert) , Part 2 (rvalue references) , Part 3 (decltype) | Write Games | Fix Your Timestep!

nobodynews

3,128

December 18, 2012 11:18 PM

As for tiles that are similar to what you're looking for, are any of the ones here good? http://hasgraphics.com/category/tilesets/

C++: A Dialog | C++0x Features: Part1 (lambdas, auto, static_assert) , Part 2 (rvalue references) , Part 3 (decltype) | Write Games | Fix Your Timestep!

farmdve

194

Author

December 19, 2012 08:13 PM

I tried flipping the image with GIMP and pasting the flipped images on to the sprite sheet. But something is wrong. When the object moves right, the movement is jerky. When it moves left, it's smooth.

dAND3h

220

December 21, 2012 10:02 PM

Are you sure it is an exact mirror of the original? If you don't align the images in the spritesheet an exact distance (usually) then the actual texture will be slightly bigger than the sum of all the animation frames, meaning the frame width/height will be calculated incorrectly

Orthogonal projection of 2D map.

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Orthogonal projection of 2D map.

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