HLSL is a proprietary shading language developed by Microsoft for use with the Microsoft Direct3D API.
1
vote
1answer
1k views
SV_POSITION in pixel shader
What are the uses for SV_POSITION in the pixel shader? Previously this was the POSITION semantic and it wasn't readable in the pixel shader, but now that it is, what can it be used for?
In an SM2 ...
4
votes
1answer
382 views
Bitwise operators in DX9 ps_2_0 shader
I've got the following code in a shader:
// v & y are both uints
nPixel = v;
nPixel << 8;
nPixel |= y;
and this gives me the following error in compilation:
shader.fx(80,10): error ...
2
votes
3answers
3k views
Hue, saturation, brightness, contrast effect in hlsl
I am new to pixel shader, and I am trying to write a simple brightness, contrast, hue, saturation effect. I have written a shader for it but I doubt that my shader is not providing me correct result, ...
2
votes
2answers
126 views
Distance to a sphere, in Screen Space
Is it possible to find the distance of a pixel to a rendered sphere, in screen space? All my naive solutions for just using the 2D screen distances are failing because of the warping that occurs ...
18
votes
2answers
2k views
How do I create a wide-angle / fisheye lens with HLSL?
What are the concepts that need to be implemented in order to achieve the effect of a wide angle lens of varying extremities?
Pseudocode and specific explanation referring to the various stages of ...
0
votes
0answers
139 views
Porting simple FFP bumpmapping to HLSL
I'm trying to port some antiquated D3D8 Dot3 bumpmapping code from fixed function calls to an HLSL shader. The original code looks like the following:
dev->SetTextureStageState (0, D3DTSS_COLOROP, ...
1
vote
1answer
1k views
Problem with HLSL :TextureCoordinate0 is missing
I'm trying to create a very simple game, and am working with HLSL. I got this error in my draw method:
The current vertex declaration does not include all the elements
required by the current ...
2
votes
1answer
518 views
Can you store negative numbers with XNA HLSL?
I am trying to make a ripple effect with a HLSL shader, it works so far but I need to output negative numbers and that won't work for the calculations. Is there some way to do this with the ...
4
votes
2answers
269 views
Is it possible in HLSL to use bitfields?
I have in memory a representation of my 2d GameMap (think of a Scorched Earth like landscape).
The map is made up of MapElements, a MapElement is made up of 64 bits defined like
struct MapElement {
...
1
vote
1answer
236 views
HLSL weird matrix behaviour
I have some problems using an int 3x3 matrix as the convolution filter to do edge detection. (I know int matrices are not very meaningful since there is only float on the gpu)
Here is the code:
...
0
votes
1answer
514 views
CG/CGFX to GLSL
So, I'm making the painful move from my beloved XNA to OpenTK, and I'm stuck:
Since I've got a LOT of existing shaders written in HLSL, NVidia's CG compiler seems like a natural way to minimize the ...
1
vote
1answer
125 views
How to mix effects together?
Lets say I have got terrain effect, contains multitexturing, light. Now water effect. It must be different, but must be also affected by light. Other one, player effect, must also be affected by ...
1
vote
1answer
294 views
Writing to multiple RenderTarget2D's from HLSL shader
I need to write to two render targets: one for colour and another for depth+normal (for post-processing). I have a problem, though. Both targets seem to be getting the value output by COLOR0, while ...
3
votes
1answer
587 views
*DX11, HLSL* - Colour as 4 floats or one UINT
With the DX11 pipeline, would it be much quicker for the vertex buffer to pass one single UINT with one byte per channel to the input assembler, as opposed to three floats? Then the vertex shader ...
2
votes
1answer
493 views
Shader optimization - Cg/HLSL pseudo and via multiplication
HLSL/Cg do not allow texture fetching inside conditional blocks. To get around this I am first checking a variable and performing some computations, afterwards I set a float flag to 0.0 or 1.0, ...
3
votes
1answer
519 views
Shadow-mapping xna
I've been trying to implement shadows in my game and I've been following quite a few tutorials online, mainly Riemers, but I'm always getting the same 2 errors when I'm drawing my models and setting ...
2
votes
1answer
205 views
Shader and Custom Vertex Format Errors
I am creating an editor of sorts that allow you to create 3D voxel models. I just got started and have ran into a few errors. Here is what it is producing:
I think the problem has to do with the ...
1
vote
2answers
175 views
How (if possible) would I change the BasicEffect Matrix mid draw
Say, for example, I have a list of enemies. Each enemy is a textured quad which is the stored in a singular shared VertexBuffer and IndexBuffer with the buffer usage set to BufferUsage.WriteOnly ...
6
votes
2answers
960 views
Electricity effect using XNA and Shaders
I'm looking for a shader or sample that does an electricity or lines-of-force effect between two points that can be used with XNA 3.1.
3
votes
4answers
453 views
Enconding/Decoding bit value in Texture Alpha Channel
I am Rendering to a SurfaceFormat.Color. (R8G8B8A8)
The alpha of this format has 8 bits and I want to be able to use those 8 bits as a bit field.
For example, in one pass of my render, I want to save ...
2
votes
2answers
588 views
Is the output from D3DCompile specific to one GPU, or not?
In Direct3D 11 there is a two-stage shader compilation process; you first pass the HLSL source code into D3DCompile, which outputs a "blob" of bytecode. You then take this blob and call ...
2
votes
2answers
617 views
Why can't I get a bool packed and aligned into a D3D constant buffer?
Alright, I'm having a hard time getting a bool packed and aligned into a hlsl constant buffer and I'm not sure why.
Here is the buffer in hlsl
cbuffer MaterialBuffer : register(b1) {
float3 ...
1
vote
1answer
230 views
screen coordinate not working with pixel values
I have a very simple effect file shown below. I am using this to draw 2D lines, however it is not behaving how I expected and I can't seem to get my head round why.
If I draw a line that goes from ...
9
votes
1answer
2k views
Wave ripple effect?
I've been working on a tower-defense game for some time now, and so far I am really satisfied with the results. However, there's one thing I'd like to add.
I've seen a video of GeoDefense for Windows ...
1
vote
1answer
380 views
Sampling from Normal Map and Diffuse Map in Pixel Shader
I'm having some issue changing a basic lighting shader to take a normal texture and a diffuse texture for a model and then using the normal texture for lighting.
The code is very simple and i can't ...
2
votes
0answers
373 views
3D Studio Max Models and Shaders to XNA
I am looking for a way to import my 3D models, including materials and shaders to from 3D Studio Max to XNA.
For example, if I have a model, with diffuse, bump, reflection textures and values (in ...
2
votes
1answer
1k views
Some assistance with selective 2D Bloom in XNA
I'm in need of some assistance, as I've been at this for 2 days now and have gotten almost nowhere.
I'm trying to use the XNA Bloom sample's component to apply bloom only to my UI text. (The only ...
1
vote
3answers
174 views
Extracting blend values from uint32 not working as expected
I have the following shader configuration code :
uint gBlendValue = 0xffffff00;
Terrain.Effect.GetVariableByName("gBlendValue").AsScalar().Set(gBlendValue);
And I have the following shader code :
...
3
votes
2answers
231 views
Fire range arc behind buildings
need some help with HLSL. Each charater in my game shows a fire range arc (which is a textured model) which show how far the guy can shoot, see
It looks ok, but I hate the fact that it shows even ...
0
votes
1answer
591 views
Some help understanding and modifying a 2D shader
I have a similar question as the one posed here, except that I don't wish to use a 1D Color Palette.
I simply wish to have it display 1 color of my choosing (red, for example). I plan to use this ...
3
votes
2answers
491 views
How to achieve hologram projection effect with head tracking
I want to recreate this:
http://www.youtube.com/watch?v=9xMSGmjOZIg&feature=related
I can take care of tracking the user's head, and in one of the comments I believe the author says that he used ...
2
votes
1answer
785 views
Why is a fully transparent pixel still rendered?
I am trying to make a pixel shader that achieves an effect similar to this video http://www.youtube.com/watch?v=f1uZvurrhig&feature=related
My basic idea is render the scene to a temp render ...
0
votes
2answers
1k views
How to achieve after-image pixel shader effect
How would one go about writing a pixel shader like this one in XNA 4.0?
http://www.youtube.com/watch?v=f1uZvurrhig&feature=related
1
vote
1answer
631 views
How to set TextureFilter to Point to make example Bloom filter work?
I have simple app that renders some particles and now I am trying to apply the bloom shader from the xna samplers ( http://create.msdn.com/en-US/education/catalog/sample/bloom ) to it, but I am ...
5
votes
2answers
493 views
Spin/Rotational Blur
How do I perform a circular/rotational/spin blur on an image - using DirectX9.0 and HLSL?
For example:
11
votes
4answers
964 views
How does an HLSL shader actually end up affecting the render output?
I understand the syntax of HLSL, for example let's pretend I have this as my HLSL:
struct VOut
{
float4 position : SV_POSITION;
float4 color : COLOR;
};
VOut VShader(float4 position : ...
2
votes
1answer
392 views
tiled map - changing textures? (XNA HLSL)
I have successfully created a tiled map of various textures. Right now, i had a Vector4 in my own custom Vertex declaration deciding what texture each of the tiles should be. This is working ...
1
vote
1answer
547 views
Rendering fancy particles?
I'm making a tower-defense game for Windows (not phone) in XNA.
I've seen this video of another tower-defense game for Windows Phone that uses particle effects, which I really like. They change ...
5
votes
1answer
4k views
DirectX11, how do I manage and update multiple shader constant buffers?
Alright, I'm having a hard time grasping how constant buffers are bound to a pipeline stage and updated. I understand that DirectX11 can have up to 15 shader-constant buffers per stage and each buffer ...
12
votes
3answers
874 views
HLSL Translucent Plastic Shader
I'm trying to produce a shader to replicate a white plastic object with a colored light inside. Either by having a shader that will be translucent and if I put a light inside the object the light will ...
3
votes
1answer
382 views
Increasing resolution of a texture?
I'm doing some experiments on my own to improve my general skills with HLSL and so forth. In other words, I'm not doing any serious game development, but only looking to expand my knowledge within the ...
5
votes
1answer
548 views
XNA HLSL - what happens if I grab a pixel outside a texture?
I'm using the tex2D function of HLSL, and I am wondering what will happen if I try to grab a pixel from a pixel coordinate outside of my texture (as an example 1.1). Will it clamp? Will it repeat the ...
19
votes
2answers
928 views
Weird white outline around model
I'm working on a game in XNA 4 and I recently switched to a deferred shading implementation following this guide. A strange white outline is showing up on my models now and I'm not sure whats causing ...
1
vote
1answer
743 views
XNA - Getting HLSL pixel of current render target?
I'm setting a render target in XNA using the following lines of code:
Game.GraphicsDevice.SetRenderTarget(physicsTexture);
Game.GraphicsDevice.Clear(Color.White);
...
16
votes
7answers
832 views
Spawning units in a world made by Perlin noise?
There's some issues that I've come across in my Perlin noise-based game. Take a look at the attached screenshot below.
The white areas you see are walls, and the black areas are walkable. The ...
0
votes
1answer
492 views
D3D11 - Setting multiple ID3D11SamplerStates for the pixel shader stage once and leaving them be
In my Direct3D 11 application, I am using several sampler states to retrieve texture data. Some of them are used in all pixel shaders, some of them are only used in very specific ones.
The question ...
2
votes
1answer
457 views
Model in Blender GLSL to XNA HLSL
Is it possible to make model in Blender, with enabled GLSL, add multiple textures, etc, and then just load it in XNA, where's own HLSL? Will it work?
1
vote
1answer
962 views
Why can't I add a float4 read from a Texture2D.Sample in the Vertex Shader
These lines work (compile fine):
float4 offset = HeightMap.Sample(HeightSampler, input.Texcoord);
input.Position.xyzw += float4(0, 1, 0, 0);
These do not (any use of offset together with ...
1
vote
1answer
342 views
Perlin noise example the same on CPU as GPU?
I am looking for an example site with a Perlin Noise implementation in both CPU and GPU, that generates somewhat the same results in those two places.
I see many CPU implementations of Perlin Noise, ...
5
votes
1answer
586 views
Perlin noise - copying the algorithm on the CPU?
I have successfully made a Perlin noise algorithm on the GPU. It works as expected, and generates great results. Now, as part of the physics calculations in my game, I need to replicate the exact same ...
