manipulatine "output" picture..
Blitz3D Forums/Blitz3D Programming/manipulatine "output" picture..
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topic title may be a little confusing :) but let me explain what i mean.. is it possible to grab a frame.. change it.. and display it.. by changing it i mean... put an effect on it.. like pixleize it or blure it.. so the player sees this effect in the game.. /Spy |
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sure. After calling renderworld, modify the pixels of the backbuffer. However, this strategy is way to slow. simply writepixelfast and readpixelfast would take a while, much less additional calculation. here are some better methods that do it differently: http://www.blitzbasic.com/codearcs/codearcs.php?code=814 - HAven't used myself, but looks good There's one by Arkon that is probably in the code arcs, but I couldn't find it, so here: Global ark_blur_image, ark_blur_texture, ark_sw, ark_sh Function CreateBlurImage() ark_sw = GraphicsWidth() ark_sh = GraphicsHeight() ;Create sprite Local spr = CreateMesh(camera) Local sf = CreateSurface(spr) AddVertex sf, -1, 1, 0, 0, 0 AddVertex sf, 1, 1, 0, 1, 0 AddVertex sf, -1, -1, 0, 0, 1 AddVertex sf, 1, -1, 0, 1, 1 AddTriangle sf, 0, 1, 2 AddTriangle sf, 3, 2, 1 EntityFX spr, 17 ScaleEntity spr, 1024.0 / Float(ark_sw), 1024.0 / Float(ark_sw), 1 PositionEntity spr, 0, 0, 1.0001 EntityOrder spr, -100000 EntityBlend spr, 1 ark_blur_image = spr ;Create blur texture ark_blur_texture = CreateTexture(1024, 1024, 256) EntityTexture spr, ark_blur_texture End Function Function UpdateBlur(power#) EntityAlpha ark_blur_image, power# CopyRect ark_sw / 2 - 512, ark_sh / 2 - 512, 1024, 1024, 0, 0, BackBuffer(), TextureBuffer(ark_blur_texture) End Function |
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oh thank you... hmm another thing i wanted to know is.. is it possible to manipulate the picture within a .dll file.. and output it in the program.. i know how to use .dll's to do something liek findwindo and some windows stuff.. but if theres a pice of code somewhere how to acctualy do something that is "visal" over a .dll it would be cool if someone could post the link to it here.. well i think i saw somewhere a demo how to mess around with sprites in a program over a .dll but it had no source so i wasnt able to see how it was done.. /Spy |
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I believe it is. There was a thread going about a month or so ago about accessing memory directly using some decls and some windows API stuff. |