Tagged Questions

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

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0
votes
1answer
648 views

Direct3D11 + Assimp imported model corrupted/failed

I use Assimp library to import vertex and index data from model file. I don't know how to correctly create index buffer from mFaces array of aiMesh. Or something wrong, because i my model is ...
1
vote
1answer
337 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 ...
4
votes
2answers
332 views

Calculate mipmap level in a loop with varying iteration?

How can I calculate the correct mipmap level in a shader? It needs to be used in a loop which runs a variable number of times so the compiler will not allow me to use Sample or the derivative ...
0
votes
1answer
287 views

Game only runs at 60fps in windowed mode with a 120hz monitor?

In fullscreen the game will run at 120fps fine, the correct refresh rate for the monitor, but in windowed mode it only runs at 60fps. If I disable VSync then it runs at thounsands of fps so it's not ...
3
votes
1answer
3k views

C++ FBX Animation Importer Using the FBX SDK

Does anyone have any experience using the FBX SDK to load in animations. I got the meshes loaded in correctly with all of their verts, indices, UV's, and normals. I am just now trying to get the ...
2
votes
0answers
126 views

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 ...
1
vote
0answers
72 views

Directx Texturing problem [closed]

I've recently started exploring Directx 11. I'm almost done the introduction so I started making my own *.obj parser and it works beautifully. I accounted for the right-hand coordinate system of 3ds ...
3
votes
1answer
404 views

Direct3D reducing DrawIndexed CPU usage

I am trying to optimise some of my rendering to get is useable on lower end machines (in my case a 2GHz i5 laptop with a GT 520M). A quick investigation showed that the GPU isnt actually getting to ...
4
votes
1answer
177 views

How do these Direct3D 11 components work together?

I am having a really hard time to understand how the following Direct3D components play together and what they do (or exist for) while creating a scene on the screen. render target view render ...
0
votes
1answer
144 views

Accessing and changing texture data in SlimDX

How can I access and change texture data in SlimDX? I have a Texture2D and a Texture3D and I need to be able to go in and change either a single or group of pixels.
0
votes
1answer
262 views

DirectX 11, using Tessellation & Geometry shader in a single pass

Before all, sorry for my poor english ! With DirectX 11, i'm trying to create a random map full with GPU. Using Hull shader stage, I'm managing LOD with tessellation. Using Domain shader stage, I'm ...
2
votes
1answer
627 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 ...
1
vote
1answer
237 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 ...
4
votes
1answer
137 views

Geometry Shader : points + Triangles

I have different Shaders and for each Shader a instance of the ShaderClass class, which initializes the Shaders, Renders the Shaders, etc. I use most of the Shaderclasses without Geometry Shader, but ...
0
votes
0answers
342 views

Convert OpenGL code to DirectX

First of all, this is kind of a follow up question on @byte56 excellent anwser on this question concerning picking algorithms. I'm trying to convert one of his code examples to directX 11 however I ...
-1
votes
1answer
410 views

Why was the DirectX mesh interface removed? [closed]

I'm currently working with D3D 11 and if I understood it correctly, D3D 10 had a mesh interface built in to it which was removed in 11. If this is correct, why was the mesh interface removed? It ...
2
votes
1answer
92 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 ...
4
votes
1answer
427 views

How can I emulate point sprites in D3D11?

I have points which I pass to a vertex shader and then to a geometry shader, but now I want to get from the geometry shader a "bigger" point. So the point should get a "dadius" like it was possible in ...
3
votes
1answer
281 views

Using a switch command in one shader vs multiple shaders

If you have multiple shaders, could you instead of switching between shaders all the time just have one shader with a switch and each case will send you along to another shader function which you ...
1
vote
1answer
208 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? ...
3
votes
1answer
187 views

Mesh objects and a draw function

I'm currently working with a mesh class so I can easily create mesh objects. Now I want a draw function in my mesh class so when ever i want draw it to the screen I can just call it without any fuss. ...
2
votes
1answer
523 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 ...
2
votes
1answer
822 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 ...
3
votes
1answer
157 views

Implement Displacement Mapping: Gaps along seams

I am implementing Displacement mapping using DirectX 11 with its new tessellation stages. Diffuse map and displacement map are generated by xNormal. The result after I applied displacement mapping is ...
2
votes
1answer
105 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 ...
4
votes
2answers
358 views

Why is there a different set-constant-buffer function for every shader type?

Why are there VSSetConstantBuffers(), GSSetConstantBuffers(), PSSetConstantBuffers() (and so on) instead of just one SetConstantBuffers() for all shaders? Should I have completely separate constant ...
3
votes
3answers
1k views

What are registers in HLSL for?

I've read this document about HLSL registers, but it's more of a syntax description and not a purpose explanation. What are registers in HLSL, actually? How and when do I use them? What happens if I ...
0
votes
1answer
563 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 ...
5
votes
1answer
421 views

Multipass shaders and switching between passes

As mentioned here Effects should be avoided in DX11. If I understand correctly, that includes techniques and passes defined in *.FX files. So when doing a multipass shader (like the always-mentioned ...
1
vote
1answer
364 views

How to disable mipmapping?

I'm making a 2D game in which I create some textures dynamically for displaying as simple 2D quads. To achieve this, I call ID3D11Device::CreateTexture2D that requires a D3D11_TEXTURE2D_DESC. typedef ...
1
vote
1answer
451 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 ...
2
votes
1answer
102 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?
-2
votes
1answer
139 views

Does it matter where I initialize Directx11's shader constant buffer?

Should I initialize it before Map() or before `Unmap()? Does it make a difference?
-1
votes
1answer
206 views

Are there any open-source Direct X code-bases that I can look at to learn from as a beginning Direct X and graphics programming student? [closed]

I'm a third-year university student and I've recently begun studying Direct X 11. Mostly I've been following the samples from the SDK and reading a lot out of the MSDN. Although I have a decent ...
1
vote
1answer
125 views

When would a GPU need to write data to a vertex (or other) buffer?

I'm trying to understand why, when and how a GPU would need to write data to some buffer inside its own Video Ram. In Direct3D 11, there are two flags that concern this, which are ...
4
votes
2answers
376 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 ...
1
vote
1answer
267 views

Do textures that are inside a shader resource need to be explicitly released too? (DirectX 11)

I have a ID3D11Texture2D (that I've created manually) inside a ID3D11ShaderResourceView. When I want to Release() the resource view, do I need to Release() the texture that it is inside too? Or is it ...
1
vote
1answer
224 views

changing depth stencil state in DirectX11

An example from Frank D Luna's 3d Game Programming with Dx11 shows the following effect technique: technique11 DrawTech { pass P0 { SetVertexShader( CompileShader( vs_5_0, DrawVS() ) ); ...
1
vote
1answer
324 views

Driver error when using multiple shaders

I'm using 3 different shaders: a tessellation shader to use the tessellation feature of DirectX11 :) a regular shader to show how it would look without tessellation and a text shader to display ...
0
votes
1answer
212 views

How do I implement my old OpenGL-based gfx_render_triangle_list using DX11?

I am working at a game that has lots of procedural content. I had built a game engine using OpenGL that handles everything needed for creating a basic 2D game, sprites, primitives, blending, polygons ...
8
votes
1answer
950 views

DirectX11 without window attached?

I just wonder, if it's possible to initialize and use DX11 or DX9 for offscreen rendering only - meaning with no attached window. My intention is to do some GPU benchmarking before opening actual ...
2
votes
1answer
175 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 ...
2
votes
1answer
147 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, ...
1
vote
1answer
3k views

Creating a simple 2d engine (C++), best way to create an Sprite class?

Since MS announced that they are not give more support to XNA , for me was an opportunity to start to learn DirectX , so i wanted to learn DX11, i was following this tutorials ...
3
votes
1answer
422 views

DXGI and 2+ full screen displays on Windows 7

I am developing a program that needs two full screen Direct3D dispalys. According to the documentation I should create the swap chains in windowed mode and then switch to full screen mode. While this ...
1
vote
2answers
604 views

How to obtain a pointer to the compiled shader in D3D11

My shader creation code looks like this. std::shared_ptr<IRenderUtility::IVertexShader> D3D11RenderUtility::CreateVertexShader(IShader::INIT_DESC & desc) const { HRESULT result; ...
4
votes
2answers
332 views

Geometry shader worldviewprojection

I'm writing a simple geometry shader to create 3D "primitives" in place of a single point. I am performing all of the world-view-projection conversions within the geometry shader after creating the ...
2
votes
1answer
518 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 ...
-1
votes
2answers
2k views

Problem rendering cube using DirectX 11

I'm toying with DirectX 11 and am trying to render a simple cube, but I can't seem to get anything to show (except the clear color, which is a good sign I suppose...) Everything seems to be working, ...
6
votes
1answer
2k views

Different shaders for different objects DirectX 11

I am learning Direct3D 11, and in all basic tutorials I found on shader writing, Vertex and Pixel shaders are written so they transform whole scene same way. Tutorials like render cube with texture... ...