DirectX 11 is the latest release of Microsoft's collection of APIs which contain features to aid in game development.

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Compute Shader Memory Sharing

Ok guys I have had some pretty good success on this site but I feel that this is a pretty complex question. I am trying to do tile based deferred lighting using DirectX 11 and the compute shader. ...
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520 views

Writing to a structured buffer with a compute shader (D3D11)

I have some problems writing to a structured buffer. First I create a structured buffer that is filled with float values beginning from 0 to 99. Afterwards a copy the structured buffer to a CPU ...
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91 views

Why is it when I render a basic cube, my editor's grid changes too?

I have one HLSL file for DirectX11 that only has input layout for color and position. Then another HLSL file for the simple cube that has position, normal and textures. What I noticed is when I render ...
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1answer
445 views

How do you add rotation to particles?

Today I was working on a particle system and I can't figure out how to give the particle billboards a rotation (so to have them spinning clockwise or counter-clockwise while facing the player). I ...
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1answer
172 views

How can I render the whole faces instead of only the vertices? [closed]

I'm doing my master thesis in comparing DX9 LoD with DX11 Tesselation LoD. Therefore I use a ShaderManager that calls either the shader for the DX9 implementation, where the model is exchanged by the ...
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1answer
460 views

Render video from file to DirectX11 texture

Is there a way to render a video from file (avi, mp4, etc...) to a texture in a directx11 environment? If so, how?
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970 views

Question about mipmaps + anisotropic filtering

I'm a bit confused here and maybe someone can explain this to me. I created a simple test texture for my terrain which is nothing more than a solid green color with a black grid overlayed on top of ...
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2answers
794 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 ...
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Why can I not map a dynamic texture in D3D?

I am trying to map a Texture2D resource in DirectX11 via SharpDX. The resource is declared as a ShaderResource, with Dynamic usage and the 'Write' CPU flag specified. My call however fails with a ...
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2k views

I cannot update a shader constant via a constant buffer in DirectX 11

I've tried everything I can think of, but I cannot get a constant buffer to update a variable in my shader in DirectX 11. I followed the examples on msdn. I read and re-read the articles on constant ...
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96 views

Is it ok to mix shader types?

The title might not be precise. Let's say I have one material consisting of vertex and pixel shader, another one consisting of vertex, geometry and pixel shader, and yet another one consisting of ...
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1answer
307 views

Early Z-test / depth-test in DirectX 11

As a DirectX noob i'm trying to wrap my head around depth buffers and specifically how pixel shaders are called for obscured pixels. From what i understand, the rasterizer calls the pixel shader for ...
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96 views

Can I count all the allocated textures in D3D11?

Is it somehow possible to get the count of all texture objects on a device?
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134 views

Emulate border color texture address mode efficiently

In WinRT the border color texture address mode is not supported. The best I came up with in emulating the border address mode, is doing this in my pixel shader: float4 tcol = tex.Sample(texSampler, ...
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471 views

Creating Input layouts for different vertex types

I'm still in the planning phase for a hobby abstract renderer, and i'm wondering how i should handle multiple vertex types and different shader inputs. (This is my first graphics project, so cut me ...
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1answer
2k views

DirectX / Instance Buffer - How To Use Instance Buffers To Enable Reuse of VertexBuffer Data?

I created a simple Model framework in C++ 11 so that the same model can be rendered in different parts of a scene. What I am trying to figure out is how to reference VertexBuffer data already "set" ...
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142 views

Does the feature level affect multisampling?

I'm using DirectX 11 with the feature level 9_3 even though my computer could run 11_0, but I want to support older hardware as well. I'm using CheckMultisampleQualityLevels to check whether multi ...
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1answer
163 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 ...
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1answer
367 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 ...
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1answer
93 views

Draw call optimization for multiple meshes in DirectX11

I have a large scene in a B3D model, which includes about 120 meshes as in the following pictures: Each mesh contain a vertex buffer and material information such as diffuse, specular, ambient... ...
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1answer
50 views

How To Set Constants Using ID3DShaderReflection

I got to the point where I am tired of hardcoding shaders and decided that it was now time to look into using ID3D11ShaderReflection to get data from the shader and set my shader's constant buffer ...
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1answer
124 views

Finding out the “width” and “height” of my screen after projection added

In a 2d game, doing collisions with the edges of your screen is easy. Your textures are a 1:1 mapping of your screen resolution because your verities are too.. if your x position is > than ( screen ...
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1answer
97 views

Tessellation cracks

i'm trying to a mesh tessellate with dx11 with the tessellation factor calculated by the size of the triangle and the distance to the screen. I do the same operation on the 3 edges of the triangle, ...
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Directx 11: emulating palette swapping with shader 5.0 and c++

i'm trying to swapping the colors using a texture as index and a second one as palette. Here is the full listing of the code: #include <windows.h> #include <windowsx.h> #include ...
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1answer
164 views

First Person Camera strafing at angle

I have a simple camera class working in directx 11 allowing moving forward and rotating left and right. I'm trying to implement strafing into it but having some problems. The strafing works when ...
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1answer
673 views

DirectX11 Gamma Correction

I am writing a game using SharpDX with DirectX11 and I have been reading that it is important to apply gamma correction to my engine in order to perform correct linear lighting calculations. So I ...
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1answer
91 views

Independent blending with DXGI_FORMAT_R16G16_SINT

I'm implementing direct volume rendering engine with volume bricking, but I'm stuck with this problem: For each volume brick I render to color render target [CRT] (for visualization) and to data ...
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1answer
125 views

Direct3d Techniques and Windows 8

Under Windows 8, what is the alternative to this code: technique11 Light0Tex { pass P0 { ... technique11 Light1Tex { pass P0 { ... And: Light1Tech = ...
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1answer
291 views

DirectX11 CreateWICTextureFromMemory Using PNG

I've currently got textures loading using CreateWICTextureFromFile however I'd like a little more control over it, and I'd like to store images in their byte form in a resource loader. Below is just ...
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1answer
420 views

Hemicube algorithm d3d9 or d3d11, float valued colors

The hemicube algorithm renders the scene to 5 sides of a half-cube, from the perspective of each polygon. Assume you place the hemicube around me and render to the 5 sides. The idea is, we can see ...
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DX 11 Specular Highlights in Deferred Renderer

I am currently implementing a deferred renderer in DX11.1. Right now I am having a problem that I can't seem to crack with specular highlights when I have multiple light sources. I keep a vector of ...
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1answer
98 views

Passing Input to Compute Shader

I am using D3D11 on D3D10 hardware, trying to get a very simple compute shader to run (my hardware supports cs_4_0). What is the best way to pass data to the compute shader? I've seen some samples ...
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0answers
97 views

1:1 mapping of texels to pixels with DX11 and multisampling and linear interpolation

Is it possible to get a 1:1 mapping of texels to pixels on a multisampled target in DX 11 with interpolation? It seems to me that the texture coordinate used in the shader is always one of the ...
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Stereo 3D: drawing 2D elements at apparent screen depth

I'm developing an application making use of DirectX11's stereoscopic features. At such I am not relying on nVidia's automatic implementation. That means I have to replicate a way to render 2d elements ...
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VS2012 C++: Unable to ID3D11Device::CreateVertexShader when loading compiled CSO file

I have been trying to get a tutorial Direct X 11 application running for some time now. I'm being stymied when I try to create the vertex shader. Setting the Direct X Debug setting reveals that I am ...
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0answers
555 views

Geometry Shader and Stream Output with Directx11

I am having trouble trying to send verticies generated in the Geometry Shader to Stream Output. What I am trying to accomplish is to generate verticies from the Geometry Shader and store them to a ...
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3answers
153 views

What is the minimum of shader I need to use to run basic calculation on GPU?

I read, that the Hull Shader, Domain Shader, Geometry Shader and Pixel Shader can be used optional. So, is the Vertex Shader optional too? If no: What does a basic Vertex Shader look like? Just like a ...
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2answers
438 views

Should the world transformation matrix be stored in a constant buffer when rendering?

Generally when rendering objects you would: Apply world transformation to go from object space to world space Apply view transformation to go from world space to camera space Apply perspective ...
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3answers
380 views

One index buffer with multiple vertex buffers?

I noticed that there's IASetVertexBuffers() to set multiple vertex buffers at once but there's only IASetIndexBuffer() to set one index buffer. So I assume that I can simultaneously only have one ...
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1answer
268 views

Which coordinate space is the canonical default for each shader pipeline stage?

I'm working with Direct3D 11 and HLSL. I use four different shaders (vertex, hull, domain and pixel). I always have troubles using the right coordinate space in my shaders. Could somebody identify ...
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1answer
465 views

Determine the stride of a DirectX Texture2D line?

Is there a way to determine, or preferably calculate/predict, the the stride of a line of a DirectX 11 Texture2D resource when using SharpDX? (E.g. Can we say the stride of a line is always a power ...
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2answers
57 views

Texture2DArray in Directx11 with different formats

I'm trying to create a texture2DArray from multiple of images, each of which has different formats, and I got the following error from the DirectX11 debug layer. D3D11 ERROR: ...
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2answers
100 views

How do I correctly multiply an XMMATRIX by a scalar?

Using DirectXMath and its XMMATRIX structure in C++ and Direct X 11, how does one multiply that matrix structure by a single float scalar? I want to implement the operation B = A * f; where A and B ...
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1answer
109 views

Difference between texture arrays and multiple single textures?

I've just learnt that DirectX 10 and above have a feature called "texture arrays". Which, basically, is just a normal array of textures (shader resources) which in a shader is declared like: ...
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1answer
127 views

How can I read texel data on a separate thread in D3D11?

In D3D10, I load a staging texture onto my GPU memory, then map it in order to access its texel data on the CPU. This is done on a separate thread, not the thread I render with. I just call the device ...
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2answers
334 views

What is the depth that a pixel shader may output? Is it necessary to write Depth?

In DirectX11, what does the depth that a Pixel Shader can output mean? Does a pixel shader need to output a depth so that we "write" the depth? If not, why would we output it? For any doubts, I'm ...
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2answers
1k views

How to use UpdateSubresource and Map/Unmap?

From what I understood (from reading various pages) there are 2 ways to update a buffer: UpdateSubresource() (when buffer is created with DEFAULT usage) Map(), copy the new data, Unmap() (when ...
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203 views

How can I compile SM 3.0 effects in D3D11 in SlimDX?

var bytecode = ShaderBytecode.CompileFromFile("shaders\\testShader.fx", "fx_5_0", ShaderFlags.None, SlimDX.D3DCompiler.EffectFlags.None, null, null, out str); var effect = new ...
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1answer
198 views

Painter algorithm on transparant objects

Why do you have to use the painter's algorithm when drawing transparant objects ? Can't you just use a z-buffer, draw all non transparant/opaque objects, then draw all transparant/opaque objects last? ...
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372 views

Compiler cannot find some DX11 types (but can find DX10)?

my problem is probably trivial but I'm new to DX and have some trouble. I've found a code snippet (of a Shader class) with ID3D10Effect and ID3D10EffectTechnique types but I'm using DX11 so I changed ...