HLSL: Pack 4 values into 32 bit float.

Posted by TheBigO on Game Development See other posts from Game Development or by TheBigO
Published on 2011-01-29T19:33:25Z Indexed on 2011/01/29 23:33 UTC
Read the original article Hit count: 272

Filed under:

hlsl

I can't find any useful information on packing 4 values into a 32 bit float in HLSL.

Ideally, what I want to be able to do in HLSL is:

float4 values = ... // Some values where each component is between 0 and 1.
float packedValues = pack32R(values);
float4 values2 = unpack32R(packedValues);

I realize that there will be precision limitations, and performance tradeoffs between different precisions in different methods. I'm just wondering what ideas are out there.

Related posts about hlsl

A Quick HLSL Question (How to modify some HLSL code)

as seen on Game Development - Search for 'Game Development'
Thanks for wanting to help! I'm trying to create a circular, repeating ring (that moves outward) on a texture. I've achieved this, to a degree, with the following code: float distance = length(inTex - in_ShipCenter); float time = in_Time; ///* Simple distance/time combination */ float2 colorIndex… >>> More
Issues with HLSL and lighting

as seen on Stack Overflow - Search for 'Stack Overflow'
I am trying figure out whats going on with my HLSL code but I have no way of debugging it cause C++ gives off no errors. The application just closes when I run it. I am trying to add lighting to a 3d plane I made. below is my HLSL. The problem consist when my Pixel shader method returns the struct… >>> More
Offloading to HLSL/GPU without displaying?

as seen on Stack Overflow - Search for 'Stack Overflow'
As far as I know, certain mathematical functions like FFTs and perlin noise, etc. can be much faster when done on the GPU as a pixel shader. My question is, if I wanted to exploit this to calculate results and stream to bitmaps, could I do it without needing to actually display it in Silverlight or… >>> More
HLSL, Program pixel shader with different Texture2D downscaling algorithms

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to port some image interpolation algorithms into HLSL code, for now i got: float2 texSize; float scale; int method; sampler TextureSampler : register(s0); float4 PixelShader(float4 color : COLOR0, float2 texCoord : TEXCOORD0) : COLOR0 { float2 newTexSize = texSize * scale; float4… >>> More
Using SurfaceFormat.Single and HLSL for GPGPU with XNA

as seen on Game Development - Search for 'Game Development'
I'm trying to implement a so-called ping-pong technique in XNA; you basically have two RenderTarget2D A and B and at each iteration you use one as texture and the other as target - and vice versa - for a quad rendered through an HLSL pixel shader. step1: A--PS--B step2: B--PS--A step3: A--PS--B … >>> More

Developer IT

HLSL: Pack 4 values into 32 bit float. - Developer IT

HLSL: Pack 4 values into 32 bit float.

hlsl

Related posts about hlsl

A Quick HLSL Question (How to modify some HLSL code)

Issues with HLSL and lighting

Offloading to HLSL/GPU without displaying?

HLSL, Program pixel shader with different Texture2D downscaling algorithms

Using SurfaceFormat.Single and HLSL for GPGPU with XNA

Categories cloud