animate 2d image?

Virion · Post by **Virion** » Thu Oct 04, 2007 10:19 am

how to animate 2d image in irrlicht? i doesn't mean an already animated gif image, but something like this:

after clipped each part of the image (let's say 4 parts), how to animate them?

belfegor · Post by **belfegor** » Thu Oct 04, 2007 11:53 am

Look in IrrSpintz source.

odenter · Post by **odenter** » Thu Oct 04, 2007 1:11 pm

Look at that 2D sample. There you can see how to animate pictures.
In simple, you have to change the image which has to be drawn.

1. picture 1
2. 0.5 seconds later picture 2
3. 0.5 seconds later picture 3
4. 0.5 seconds later picture 4
1. picture 1
2. 0.5 seconds later picture 2
3. 0.5 seconds later picture 3
4. 0.5 seconds later picture 4
and so on.

Virion · Post by **Virion** » Fri Oct 05, 2007 2:17 am

Code: Select all

ITexture* spriteImage = driver->getTexture("test.bmp");
		driver->makeColorKeyTexture(spriteImage,SColor(0,255,0,255));
		IBillboardSceneNode* spriteObject = smgr->addBillboardSceneNode(NULL,dimension2d<float>(50,50),
			vector3df(0,0,0));
		spriteObject->setMaterialTexture(0,spriteImage);
		spriteObject->setMaterialFlag(EMF_LIGHTING,false);

I got problem with this. The billboard appeared but it didn't have any texture on it! The whole thing white in colour.

Virion · Post by **Virion** » Fri Oct 05, 2007 2:28 am

I've tried the animator class found in this forum as well. but what I got was a flickering white rectangle.

Virion · Post by **Virion** » Fri Oct 05, 2007 3:47 am

OPENGL BUG!! ARGH! I changed to EDT_SOFTWARE and everything work fine o_O !!!

pippy · Post by **pippy** » Fri Oct 05, 2007 9:20 am

A better way would be to resize your image. Crop it to be a multiple of 2^X. It will then display correctly in Dx8, openGL etc.

multiples of 2^X are sizes like:
16
32
64
128
512
1024
2048

and so on. You can mix them to, like 64x512. I changed my game to use these sizes and it ran perfectly on all drivers

Virion · Post by **Virion** » Fri Oct 05, 2007 11:41 am

the image is already 128x128 because I am already clear about this 2^n thingy. The pic didn't show at all!

hybrid · Post by **hybrid** » Fri Oct 05, 2007 12:19 pm

I guess it doesn't find your KeyColor. Try to use the positional version and use (0,0), otherwise use the correct alpha value (presumably 255).
Next thing, you will probably want to use an alpha channel transparency with your modified texture, so set the proper material value.
And finally, calling makeColorKeyTexture requires a mipmap regeneration of the texture, so call that one before drawing the texture.

Virion · Post by **Virion** » Fri Oct 05, 2007 1:09 pm

but even i didn't call makeColourKey it showed white as well...

MasterGod · Post by **MasterGod** » Fri Oct 05, 2007 1:40 pm

Check this, it might help.

hybrid · Post by **hybrid** » Fri Oct 05, 2007 1:55 pm

Maybe it did not load the texture at all?

TheGameMaker · Post by **TheGameMaker** » Fri Oct 05, 2007 1:57 pm

I wrote an animated sprite2D class... (its kind of handy.. I can upload it, if your still interested..)