Sprite Alpha
Blitz3D Forums/Blitz3D Beginners Area/Sprite Alpha
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| I don't want sprites colours changing when a sprite passes over another. At the moment, I have 2 sprites passing over over each other, but the colors change like its alpha is less than 1, ie, both sprites are blue, but when they pass each other the colours turn lighter blue. I need to negate this...can anybody help? |
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| Can i see your code please? |
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| Graphics3D 800,600,16,2 SetBuffer BackBuffer() layer0 = LoadSprite ("layer0.png",1) layer1 = LoadSprite ("layer1.png",1) ;hexagons camera = CreateCamera() ScaleSprite layer0, 1.5,1 ScaleSprite layer1, 3,2 sx#=1 sy#=1 While Not KeyDown(1) Cls If KeyDown(203) Then sx=sx-.01 If KeyDown(205) Then sx=sx+.01 If KeyDown(200) Then sy=sy+.01 If KeyDown(208) Then sy=sy-.01 PositionEntity layer0,sx,sy,1 PositionEntity layer1,sx/2,sy/2,1 RenderWorld VWait:Flip 0 Wend EndGraphics End |
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| sorry but i have no idea what is causing the problem :( |
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| I tried running your example with 2 blue images made in Paint, saved as png. I did move the camera back a bit. Everything looks normally. Maybe your pngs do contain some alpha somehow ? Try running it with other images, or save the images temp. as bitmaps from mspaint, to ensure there is no alpha data in the files. |
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| I changed them to BMP format from MSPaint and got the same result! AAAAAAAAARRRRGGHHHhhh! |
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| Try calling ClearTextureFilters first, see if that helps. Any flags you use with LoadSprite, LoadTexture etc, are combined with whatever is set in TextureFilter() - defaults to 1+8 iirc. |
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| Nope...no joy at all. This must be a tricky thing to do? |
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| Are you doing anything with EntityBlend or EntityFX? |
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| It sounds like the usual sprite behavour. Load a texture specifically only using the colour flag: Use cleartexturefilters() as Gfk says. Create your sprite using createsprite(), then apply your loaded texture:
ClearTextureFilters()
texture = loadtexture("my texture.png"+1)
sprite = createsprite()
entitytexture sprite,texture
That will sort it. It's happening because sprite upon creation are alphaed, so, the two sprites are passing over each other, creating a less alphaed overall image. If your looking for your sprites to be alphaed, i'm afraid you'll have to live with it, cause i don't see any easy way around it tbh. |
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| See link for example of what's happening... http://www.freewebs.com/jphamilton/example.bmp ...As you can see, the upper right is where both sprites are overlayed...and the blues are brighter. I need the sprites to be flat - not Alpha-ized! |
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| That's the smallest picture i've ever seen :oP Any chance of running code? And have you tried what i suggested. That should sort it. |
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| Apologies, Ross...I posted before I re-read the board. Am trying your code now |
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| PERFECT! Cheers Ross |
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