Tagged Questions
The hlsl tag has no wiki summary.
0
votes
1answer
38 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 ...
1
vote
2answers
60 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
53 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 ...
1
vote
1answer
43 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
87 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 ...
0
votes
1answer
165 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
71 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 :
...
2
votes
1answer
78 views
How do I keep a triangle strip between geometry shader invocations?
I'm using a small geometry shader to build a "ribbon" from a set of points. For each point, I create 4 vertices that represent a section of the ribbon:
[maxvertexcount(4)]
void GS( point GS_Input ...
1
vote
1answer
87 views
HLSL: how to get/set effectvariable to an array of structs with Direct3D10
HLSL Code:
//Lights
struct Light
{
float3 pos;
float3 dir;
int type;
} m_aLights[3];
How can I get/set an effectvariable to m_aLights with Direct3D10?
Thanks
9
votes
1answer
220 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 ...
3
votes
2answers
127 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
153 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
143 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
199 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 ...
-1
votes
2answers
135 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
106 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
137 views
Spin/Rotational Blur
How do I perform a circular/rotational/spin blur on an image - using DirectX9.0 and HLSL?
For example:
2
votes
1answer
195 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
237 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 ...
8
votes
1answer
351 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 ...
3
votes
1answer
351 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 ...
3
votes
1answer
148 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
198 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 ...
1
vote
1answer
178 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);
...
0
votes
1answer
164 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 ...
18
votes
2answers
630 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 ...
16
votes
7answers
688 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 ...
1
vote
1answer
154 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
193 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
299 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 ...
