DirectX is a set of multimedia APIs from Microsoft aimed primarily at game developers. Popular APIs within the DirectX collection include Direct3D, XInput, and XAudio.

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How can i create Game Chat? [on hold]

How can I create an in-game chat like this? Can someone tell me how to do this? I'm using DirectX 11.
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Texturing without D3DX

Well, i have been online for hours looking for solutions, but i have found none. Im looking for a way to create textures without the function D3DXCreateShaderResourceViewFromFile. Since D3DX is ...
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264 views

rendering an image within c# & sharpdx dirext3d9 [game overlay]

I'm following this guide and the related blog post to implement a basic game overlay for DirectX 9 games using SharpDX. So the tutorial already have an example for text rendering but I need to be ...
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161 views

Modifying depth values in PixelShader (SharpDX)

I'm relatively new to DirectX, and am currently converting some WPF 2D graphics code that displays geo-located sonar returns. I am using SharpDX, and rendering via a D3DImage. I've got the basics ...
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2answers
808 views

How do I determine the look-at vector of a free-look camera?

I'm trying to create a free-look camera with DirectX 10. I've figured out how to get the directions for forward and back and left to right. However, I don't know how to rotate the look-at vector of ...
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39 views

Speed up the DirectX game - how else can I boost the fps with typical triangle drawing?

I am writing my own c++/DirectX engine. I've made the basic framework and here comes the time for optimizations. I don't want to focus on optimizing the resources themselves right now (meshes, ...
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1answer
174 views

How to draw an ellipse with DirectX 9?

I can draw the outline of an ellipse but I want to draw a filled in ellipse, but I can't seem to get the code to work. Any help would be great! I am using DirectX 9 and D3DX.
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1answer
44 views

DX11 Mixing 2D and 3D

So I am somewhat new to working with DirectX rendering, and I have done some 2d and 3d work. I am planning on working on a new application where I will be rendering a bunch of 3d scenery, and then ...
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1answer
152 views

Constant buffer not updating

I'm trying to rotate models independently of each other however I cannot for the life of my figure out how. I have gotten to the stage of writing this: std::vector<int>::size_type st = ...
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1answer
178 views

DirectX11 Equivalent of OpenGL code

I am currently porting parts of my engine over to D3D11 from OpenGL and was trying to figure out how I would accomplish the following blending functions in D3D11. glEnable(GL_BLEND); ...
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1answer
106 views

3D GUI Shader Problem

So I want to create one of these in my directX11 project. The little axis there that shows you the direction. I have a nice 3d shader for my world geometry that I tweaked from Frank D. Luna (He ...
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17 views

Device.SetRenderTarget Prevents Shader From Executing

Using DirectX 9 and C++. I'm trying to finalize this code to run a HLSL shader on in-memory data. In theory it should be working. In practice the shader doesn't run. ...
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26 views

How to Set HLSL Shader Input Textures?

Very simple question. With C++/Direct9, I'm creating a texture as RenderTarget with a full screen quad, creating a scene, setting a HLSL pixel shader, copying the image and then call Present. 1) How ...
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1answer
47 views

How to debug a DirectX crash on client machine?

I have customers who are experiencing crashes which I can't reproduce on my machine. From the minidumps they sent over, it appears that their crashes all seem to be in unexplained Direct3D calls, ...
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1answer
141 views

Having trouble getting shader to work with sprite batch in XNA #4

I found a neat "CRT screen" effect shader on the web, but I've never used shaders before and I can't seem to get it working properly. If I do the second sprite batch in my code here normally without ...
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14 views

DX9 How to Apply HLSL Shader with StretchRect

Using DirectX 9,I'm trying to run a HLSL pixel shader on video frame data while copying it from one texture buffer to another texture buffer without displaying it. StretchRect at the end is what ...
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16 views

How to Set Compiled Pixel Shader

When compiling a shader with D3DXCompileShaderFromFile, it works. But what if the shaders are pre-compiled into .cso files? I have this function. It fails. What's the proper way of loading the pixel ...
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12 views

DX9 StretchRect to Texture Fails

Alright, I got the code almost working to copy memory data to a texture, process it with DirectX9 into another texture and copy the result back to memory. Almost all the errors are gone and the code ...
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1answer
20 views

How to Create Device with D3DFMT_A32B32G32R32F

I'm trying to create a DirectX9 device to copy video frame data from one memory buffer to another while processing it through a HLSL shader. I will need half-float or float precision for each channel. ...
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33 views

Can DirectX9 be used without HWND handle?

I found an excellent code here that does almost everything I need: running an HLSL shader on memory texture to process video frames into another texture buffer without displaying it. ...
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339 views

Animation, Interpolation, & Structure

I have been working on animation in my small game engine recently and I am implementing some interpolation to be used with skeletal animations. I know how to do interpolation but I am not sure where ...
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1answer
35 views

Maya 2015 Collada mesh transforms not applied

I am trying to load a dae (Collada) model into my 3d engine. The problem is they export the vertices and transforms seperately. So in Maya 2015 it looks like this In the game engine I have it simply ...
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37 views

Simulating sun 3d direction

At the moment I got the following to simulate the suns direction: void Sun::Update() { if (!mIsMoving) return; const auto now = Clock::now(); const auto timeDiff = now - ...
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2answers
26 views

How to handle mesh update in its vertex buffer

suppose i have a mesh, it can undergo any kind of changes - bend, stretch, even been torn. How should i update vertex buffer in DirectX for this mesh. For now i recreate it every time, and i don't see ...
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129 views

What is DirectX 11's equivalent of D3DCAPS9::MaxVertexIndex of DirectX 9?

I'm porting a DirectX 9 program to DirectX 11. How do I get the value in DirectX 11 that is retrieved using D3DCAPS9::MaxVertexIndex in DirectX 9? Thanks in advance.
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224 views

DirectX9 Drawing Sprites out of place due to offset

This is my very first time into DirectX. Im trying to make a simple 2D game, just for learning the basics. And i've achieved that. The next step is to draw an animation using sprites. For that, i ...
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32 views

Run Simple HLSL Pixel Shader with DirectX 9

I'm trying to run HLSL Pixel Shaders with DirectX 9 where I feed a texture in, run the HLSL code and copy the resulting texture back from memory. I think I'm getting pretty close, although a LOT of ...
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OpenGL textureGather and DirectX gather

These functions sample multiple RGBA pixels but return only a single component. OpenGL: https://www.opengl.org/sdk/docs/man/html/textureGather.xhtml DirectX: ...
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114 views

Is DirectX free for commercial use?

This question isn't gamedev per se but it is definitely relevant. Still, if it's off-topic, please direct me to the proper SE page. This question has probably already come up many times but I'd like ...
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1answer
228 views

SSAO all jagged

So I've been working on SSAO for awhile, and I thought I had it right, untill I loaded up the sponza scene that accompanied the SAO technique I'm implementing ...
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1answer
22 views

DirectX 11 throws out my pixel shader when I multiply verts by MVP

Been following some tutorials online for DirectX 11. I was able to successfully get a triangle to render in screen space. But the moment I add a MVP matrix, my triangle disappears! Looking at it in ...
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1answer
45 views

DirectX 10 - dimension of vertices passed to vertex shader

I'm trying to learn DirectX programming. Looking at different tutorials there is something about vertices that I find a bit confusing. I know that DirectX uses vertices with four elements (x, y, z, ...
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4k views

Is DXUT deprecated?

I'm starting on a new project and was thinking of using DXUT. On the Microsoft site though, this page says the content has moved to this page. And on that second page, which is an overview of ...
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Reading from a staging 2D texture array in DirectX10

I have a DX10 program, where I create an array of 3 16x16 textures, then map, read, and unmap each subresource in turn. I use a single mip level, set resource usage to staging and CPU access to read. ...
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97 views

Run HLSL in C++ Basic Sample

I'm considering the idea of taking shaders written in HLSL and running them in an AviSynth plugin to process videos. This would allow accessing various shaders, and also to have GPU acceleration. I'm ...
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72 views

DirectX map/unmap

In my 2d game i want to use dynamic buffers to render sprites. My question is, when should i map unmap buffer? The 2 possibilities are: #1 //game logic map() fill buffer unmap() render() #2 ...
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1answer
100 views

How can I manually syncronize render calls with a monitor's refresh rate in Direct3D 9?

I have an application that utilizes Direct3D 9 to render 3D graphics. I'm trying to manually control the number of frames rendered in a given second. Here is pseudocode: while( bInGame ) { // ...
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1answer
50 views

Second pass in multipass effect is ignoring

I am trying to render my vertecies in 2 passes, but seems I am doing something wrong, because only one pass applying. I cannot make the second one work despite that second pass is applying. Here is ...
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1answer
87 views

Encoding Float to RG/RGBA and Blending

Encoding a float value inside a RG or RGBA texture is very interesting and useful but it is also become quite useless when you use blending as the result and the values might be altered because of ...
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35 views

How to calculate spherical harmonic coefficients for indirect diffuse?

After reading the article "An Efficient Representation for Irradiance Environment Maps", I'm a bit confused as how to calculate the spherical harmonic coefficients. I'd like to generate these ...
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1answer
102 views

DirectX 11 - Get the world matrix of my camera

I'm relatively new to the world of 3D games programming and I am not sure if I am understanding some key concepts correctly. Right now I have created a sphere that is 2.0f in radius which surround ...
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1answer
73 views

How to merge 2 textures into single SRV

I have 2 textures in 2 different ShaderResourceViews. What's the fastest/least expensive way to merge them into one? I would use CopySubresourceRegion but copying a texture is quite a bit expensive. ...
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2answers
317 views

How can I use OpenGL and D3D to render to the same window at the same time?

I have main render loop in which initial drawing is done via OpenGL to an SDL window, and after that the same window handle is passed to a Direct3D device, which does subsequent rendering. Once I ...
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12 views

Retrieving shared video memory using SharpDX

I am trying to retrieve the total available video memory using SharpDX via DXGI, using the Description of the best available adapter. The DedicatedVideoMemory is correct (1GB in my case), but the ...
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23 views

how to rotate a 3d instance using an HLSL shader

ok, im experimenting a little with HLSL shaders, i have the following code for a vertex shader, it is used to render a few instances of a 3d model. Let's say i want to rotate these instances on their ...
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2k views

How do you make Direct3D work in a browser?

I've come across games that are 3D that are playable in a browser. They require a plugin to be installed to work. I guess the plugin creates a D3D window inside the browser. How would I go about ...
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1answer
51 views

To FX or not to FX

General confusion... I'm not using Effects11 yet. Regarding the sorting/grouping induced by filenames: Initially I had them grouped by shader type: SomePurpose1.hlsli SomePurpose1_SubPurpose1.hlsli ...
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38 views

3D Studio MAX dxf model to OpenGL and DirectX

Main Question I saw this Loading and Animating MD5 Models with OpenGL an old post explaining .md5mesh .md5anim files. Is there any similar alternate mechanisms? Additional Questions 1.) Is there an ...
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810 views

32 Bit colors difference

Im going through a tutorial to create a basic directx framework, and i've noticed that in there (and other tutorials, when i checked out) use DXGI_FORMAT_R32G32B32A32_FLOAT inside the input element ...
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170 views

Low quality bilinear sampling in WebGL/OpenGL/DirectX

I'm seeing low quality bilinear texture sampling in WebGL, OpenGL and Directx, and was wondering if anyone knew how to make it higher quality? The picture below should help show what I mean. The ...