Bloom problem

Blitz3D Forums/Blitz3D Beginners Area/Bloom problem

Dock (Posted 2004) [#1]

I'm using bouncers excellent Bloom code, but I'm having a slight problem. It seems to be displaying my image in letterbox format with strange images at the top. I tried this at both 640x480 and 800x600. Any idea what the problem is? Thanks in advance!

Rob Farley (Posted 2004) [#2]

Without looking at the code I would guess cameraviewport.

Dock (Posted 2004) [#3]

CameraViewport wasn't defined (oops!), but defining doesn't seem to have made any diffence. Hmm.

Dock (Posted 2004) [#4]

Hmm... playing around with this but still not having much joy. It's a bit of a headache as this uses an old version of SSwift's blurtexture function, but the shadow system uses a new version! I realise the new one ought to be up to the task, but it doesn't seem to want to play ball. Hmm.

sswift (Posted 2004) [#5]

I broke the blur function in my shadow system for a long time. This version of the blur function is up to date and should work: http://www.blitzbasic.com/codearcs/codearcs.php?code=754

Dock (Posted 2004) [#6]

Playing around with the bloom code I have, it seems that even the demo I have suffers the exact same problem. I don't think it is sswift's blur code to blame. Does anyone have a working copy of Bouncer's bloom code that they could share?

Dock (Posted 2004) [#7]

Aha - I found a working version of the bloom code, so I seem to be alright now. Using this combined with SSwift's new blur routine will work perfectly. ;GLOW VARIABLES Global GL_cam Global GL_scenecam ;This stores the pointer to your scene camera Global GL_offset = 65536 ;Offset for the glow camera Global GL_texsize = 256 ;Glow texture resolution (128 or 256 recommended) Global GL_camzoom# = 1.0 ;Change this value if your camzoom differs from the default Global GL_sprite Global GL_tex,GL_texbuffer Global GL_sprite_scene Global GL_timer=1 ;Initializes the filter ;-------------------------- ;camera - your main scene camera ;NOTE - do not change camera rotation before calling this init function. Function InitGlow(camera) GL_scenecam = camera ;SET GLOW CAMERA GL_cam = CreateCamera() PositionEntity GL_cam,GL_offset,0,0 CameraProjMode GL_cam,2 CameraRange GL_Cam, 1, 100 CameraClsMode GL_cam,0,1 CameraViewport GL_cam,0,0,GL_texsize,GL_texsize HideEntity GL_cam ;SET GLOW SPRITE 1 (FOR DARKENING PASSES) GL_sprite = CreateSprite() GL_tex = CreateTexture(GL_texsize,GL_texsize,256+16+32) GL_texbuffer = TextureBuffer(GL_tex) EntityTexture GL_sprite,GL_tex PositionEntity GL_sprite,GL_offset,0,1 EntityOrder GL_sprite,-999 EntityFX GL_sprite,1 ;SET GLOW SPRITE 2 (FINAL OVERLAY) GL_sprite_scene = CreateSprite() EntityTexture GL_sprite_scene,GL_tex ScaleSprite GL_sprite_scene,2*(1.0/GL_camzoom),2*(1.0/GL_camzoom) PositionEntity GL_sprite_scene,EntityX(GL_scenecam),EntityY(GL_scenecam),EntityZ(GL_scenecam)+2 EntityParent GL_sprite_scene,GL_scenecam EntityOrder GL_sprite_scene,-999 EntityFX GL_sprite_scene,1 End Function ;Renders the filter ;-------------------------- ;fade - initial fade value for the scene ;dark_passes - how many multiply passes (darkening) ;glow_passes - how many blur / glow passes ;glare_size - blur radius ;just play with the values until you find a good combination. ;IMPORTANT NOTES ;* The scene camera will be hidden automatically... ; but you must hide every other camera you might be using Before calling this Function. ;* Also if you want to turn the blurring off you MUST HIDE the GL_sprite_scene object and stop calling this function (obviously :) ;* The more dark_passes and glow_passes - the slower the function is ... so beware. ; Also switching to smaller texture size will boost performance. Function RenderGlow(fade#=0.15,dark_passes=2,glow_passes=3,glare_size#=4) ;RENDER THE SCENE WITH MAIN CAMERA AND COPY TO TEXTURE ;Also apply the fade filter HideEntity GL_sprite EntityBlend GL_sprite_scene,1 EntityColor GL_sprite_scene,0,0,0 EntityAlpha GL_sprite_scene,fade CameraViewport GL_scenecam,0,0,GL_texsize,GL_texsize RenderWorld CopyRect 1,1,GL_texsize-1,GL_texsize-1,0,0,BackBuffer(),GL_texbuffer CameraViewport GL_scenecam,0,0,GraphicsWidth(),GraphicsHeight() ShowEntity GL_sprite EntityColor GL_sprite_scene,255,255,255 EntityAlpha GL_sprite_scene,1 ;SWITCH TO GLOW CAMERA AND HIDE MAIN CAMERA HideEntity GL_scenecam ShowEntity GL_cam ;MULTIPLY BLEND WITH BACKBUFFER TO MAKE THE CONTRAST HIGHER ;(RESERVE THE LUMINATED AREAS) EntityBlend GL_sprite,2 For i=1 To dark_passes RenderWorld Next CopyRect 1,0,GL_texsize-1,GL_texsize,0,0,BackBuffer(),GL_texbuffer EntityBlend GL_sprite,1 HideEntity GL_sprite ;BLUR AND PUT SOME GLOW ON THE TEXTURE ;MORE PASSES - MORE GLOW HideEntity GL_cam For i=1 To glow_passes blurtexture(GL_tex,1,glare_size) Next ScaleTexture GL_tex, 1,1 PositionTexture GL_tex,0,0 TextureBlend GL_tex, 2 ;SWITCH BACK TO NORMAL CAMERA ShowEntity GL_scenecam ;BLEND WITH ADDITIVE BLENDING WITH THE SCENE EntityBlend GL_sprite_scene,3 End Function

Clyde (Posted 2004) [#8]

It's probably just a scale issue! Good work, nice screenshot dude!