Tagged Questions
0
votes
2answers
55 views
What are registers in HLSL for?
I've read this: http://msdn.microsoft.com/en-us/library/windows/desktop/dd607359%28v=vs.85%29.aspx but it's more of a syntax descrption and not a purpose explanation. What actually are registers in ...
0
votes
1answer
29 views
Constant buffer content packing
I've read this: http://msdn.microsoft.com/en-us/library/windows/desktop/ff476898%28v=vs.85%29.aspx#Shader_Constant_Buffer but there's not much information in it. When creating a constant buffer do I ...
4
votes
1answer
145 views
How can I use shaders to make a square have a waving effect?
I'm new to using shaders to do some fancy effects and I'm struggling with them. I'm using DirectX 11 and HLSL. I have this square in the middle of the screen:
It's just a square that I've created ...
0
votes
0answers
39 views
Cascaded Shadow Maps left handed to right handed coord system
Im trying to port the Directx SDK (june 2010) sample (CascadedShadowMaps11) into a right handed version (to later implement in my engine) but i can't figure out the math, so far i got it partially ...
3
votes
1answer
122 views
Constant Buffer size mismatch on PS, fine on VS and GS
I have the following C/C++ struct:
struct ShadowMapCB {
Math::Matrix4 cropMatrix[4];
Math::Matrix4 textureMatrix[4];
float splitPlane[4];
};
and my HLSL constant buffer:
...
3
votes
1answer
181 views
Per Instance Textures, and Vertex And Pixel Shaders?
How do you implement per instance textures, vertex shaders, and pixel shaders?
Given:
1. Two different model templates in Vertex Buffer, Square & Triangle
2. Instance Buffer with [n] instances of ...
0
votes
2answers
149 views
HLSL compiler specification (optimizations)
Can I read somewhere about optimizations that HLSL compiler performs?
For example, in some codes I have different variables that get a constant value (just to let myself adjust the shader with other ...
2
votes
1answer
83 views
Nine Patch Images in DirectX
In Android development I found nine patch images very useful to draw images that have a fixed border. When the image is scaled the inner part scales, but the border stays at a fixed size.
I was ...
1
vote
1answer
106 views
Texture the quad with different parts of texture
I have a 2D quad. Let say it's position is (5,10) and size is (7,11).
I want to texture it with one texture, but using three different parts of it.
I want to texture the part of quad from x = 5 to x ...
1
vote
0answers
275 views
Need help transforming DirectX 9 skybox hlsl shader to DirectX 11
I am in the middle of implementing a skybox to my game. I have been following this tutorial http://rbwhitaker.wikidot.com/skyboxes-2. I am using MonoGame as a framework and in order to support both ...
5
votes
1answer
302 views
Partial Shader Signatures HLSL D3D11 C++
I had been debugging a problem I was having in a single shader file with 2 functions in it. I'm using DirectX 11, vs_5_0 and ps_5_0. I have stripped it down to its basic components to understand what ...
0
votes
0answers
164 views
What's a good way to organize samplers for HLSL?
According to MSDN, I can have 4096 samplers per context. That's a lot, considering there's only a handful of common sampler states.
That tempts me to initialize an array containing a whole bunch of ...
2
votes
1answer
178 views
How do you create a cbuffer or global variable that is gpu modifiable?
I'm implementing tonemapping in a pixel shader, for hdr lighting.
The vertex shader outputs vertices with colors. I need to find the max color and save it in a global.
However when I try and write ...
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 ...
0
votes
1answer
664 views
Changing the culling mode in the HLSL effect
I'm writing a cel-shading effect in HLSL and Direct3D 11, and I need to be able to flip the culling mode on the outline pass of the effect. I know you do this in XNA by setting CullMode to CW or CCW ...
0
votes
2answers
205 views
DX11 - Weird shader behavior with and without branching
I have found problem in my shader code, which I dont´t know how to solve.
I want to rewrite this code without "ifs"
tmp = evaluate and result is 0 or 1 (nothing else)
if (tmp == 1) val = X1;
if (tmp ...
2
votes
2answers
587 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
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 :
...
2
votes
2answers
414 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 ...
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 ...
0
votes
1answer
490 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 ...
13
votes
4answers
2k views
how does HDR work?
I'm trying to understand what HDR is and how it works.
I understand the basic concepts and have an slight idea of how it is implemented with D3D/hlsl.
However it's still pretty foggy.
Say I'm ...
13
votes
6answers
2k views
Modern Shader Book?
I'm interested in learning about Shaders: What are they, when/for what would I use them, and how to use them. (Specifically I'm interested in Water and Bloom effects, but I know close to 0 about ...
