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| 2D in OpenGL? https://delphigl.com/forum/viewtopic.php?f=19&t=2401 |
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| Autor: | Gast [ So Jan 18, 2004 12:09 ] |
| Betreff des Beitrags: | 2D in OpenGL? |
Hi I want to create a 2D game like Worm/Snake. Is OpenGL the way to go or should I use DirectX? I know Delphi quite well, but I am completely new to openGL/DirectX. Best regards, Mikael |
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| Autor: | Sascha Willems [ So Jan 18, 2004 12:19 ] |
| Betreff des Beitrags: | |
Yes, OpenGL is very well suited for 2D. Just use an orthagonal projection, where you have no perspective and you can take advantage of OpenGLs features to make things easier and a lot faster. First you can use the hardware acceleration to get many fps and second you can use OpenGL's z-buffer to easily sort your sprites, and third advantage is that OpenGL also lets you make parts of textures (sprites) transparent very easy by using alpha masking. |
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| Autor: | Gast [ Mo Jan 19, 2004 06:25 ] |
| Betreff des Beitrags: | |
Sound great! Do you have an I dea of where I should start? I suspect that first I must learn OpenGL (the basic and the 2D stuff of OpenGL). Where can I find help on that? Does anyone know where I can download a ultra simple "sprite" example somewhere? |
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| Autor: | red [ Mo Jan 19, 2004 14:41 ] |
| Betreff des Beitrags: | |
I don't know any examples about opengl-sprites, but you might want to have a look at sulaco's "window" example, which in my opinion very good to learn from. To make sprites, just load a texture and show it with gl_Quads... animated sprites wouldn't be hard, you just have to show one texture a specific amount of time and then cycle to the next one. or you can subdivide the texture in more than just one sprite-animation (which obviously need less resources) Regards, red- |
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| Autor: | noeska [ Sa Jan 24, 2004 18:12 ] |
| Betreff des Beitrags: | |
take a look here: http://www.delphipraxis.com/topic15398_ ... ngl+sprite It might just be what you need... |
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| Autor: | Gast [ Mo Jan 26, 2004 06:36 ] |
| Betreff des Beitrags: | |
Thanks for the replies. I googled the net and found several info about using sprites with OpenGL and Delphi. The best solution (for me) seems to be GLXtreem (http://www.glxtreem.tk/). It is an open-source OpenGL framework that contains stuff like a timer, an image list and a sprite engine. 3D stuff are also very well supported. I well use some weeks learning the framework (and OpenGL) and I will let you all know my opinion about GLXtreem at that time. Best regards, Mikael Thomsen http://www.mikaelthomsen.dk |
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| Autor: | Gast [ So Feb 29, 2004 17:33 ] |
| Betreff des Beitrags: | |
GLXtreem seems to be a very fine set of components if you want to use openGL in Delphi. I have made my first and quite small demo (http://www.mikaelthomsen.dk/download/Glxtest.zip) that shows some of the stuff I have learned so far. I am now able to paint lines, sprites and text with openGL 
Best regards Mikael |
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