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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70 views

Get the difference between 2 matrices

Hi I'm using C# and MonoGame, and have the world matrices of 2 objects. I need to get the difference between them, so I can effectively parent the second object onto the first. The aim is to get to a ...
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0answers
19 views

Load 2 triangles in a simple DX11 example

I'm following this tutorial, where they show how to setup a simple dx11 demo with a green triangle in the middle. I'd like to be able to modify it so that it shows 2 triangles instead, i modified the ...
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0answers
9 views

calculate ray picking using directx11 [duplicate]

I'm trying to generate a ray to check which objects has been picked. I want to check the math if its correct or no, because when I try to draw a ray, Its not visible at all, and the ray origin is in ...
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1answer
19 views

DirectX 11 Vertex Shader Fragmentation

I was wondering how my vertex shader is causing my cube to be render weirdly? I am using the Visual Studio graphics tool and see that my input assembler is correctly receiving the cube and I can only ...
1
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0answers
23 views

Light intensity on plain from angle

Given a vector (v) for the direction of light and a vector (n) for the normal of a plain. How can I calculate a rudimentary intensity value (i) where When (v) points at (n) directly/face on (i) = ...
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1answer
21 views

Stream Output (SO) stage in Directx 12?

Does Directx 12 have a Stream output Stage?
2
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0answers
21 views

DirectX 11 - Problem with low resolution decals

I'm trying to add a decal system in my DirectX engine but i'm facing some problems with the quality of the textures projected. Every other no decal texture look fine, but these ones look really bad. ...
0
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1answer
14 views

Set up a basic D3DXQUATERNION

I'm trying to set up a D3DXQUATERNION to operate a rotation of 90 degrees around the Y axis. I tried in the following way: D3DXQUATERNION tempRot1(0.0f, 1.0f, 0.0f, cos(XM_PIDIV2/2)); because in ...
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0answers
22 views

Implementing Depth of Field in DirectX 11

I have created a procedural dungeon demo in DirectX 11 as part of an assignment, and am now looking to add some post processing to it. I have implemented whole scene Gaussian Blur in the past, but ...
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0answers
27 views

3d rotation of a cube using DirectX

I can't solve an apparently simple problem: i have a cube, similar to the one in the following picture I've tried to write a small demo where i can rotate the cube by dragging the mouse, but i ...
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0answers
21 views

DX11 CreateTexture2D

When i want to load texture i can either call CreateTexture2D without passing pointer to texture content passing Default usage and call UpdateSubResource or CreateTexture2D with pointer to texture ...
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0answers
33 views

Quad not rendered correctly after window resize

I have a orthographic camera. With the help of this camera i'm able to render a quad onto the screen using screen-cordinates. Using the camera i perform the zoom in/out on specific mouse position ...
3
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0answers
17 views

RWTexture3D in Compute Shader on Intel HD 4000

I'm having some weird issues running a Compute Shader with DirectX 11 on an Intel HD 4000 GPU. The goal is to write different shapes into a DXGI_FORMAT_R32_FLOAT 3D Texture with a size of ...
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1answer
33 views

Why when releasing a DirectX Texture it fail

I have an instance where a class creates a DX9 texture via UINT usage = D3DUSAGE_RENDERTARGET; HRESULT hr = D3DXCreateTexture (m_D3DDevice, 200, ...
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1answer
82 views

How to Load and Apply a Cube Map with DDS Texture Loader?

So I have been spending a lot of time recently implementing a working skybox/skysphere, and have almost completed it. The last thing that I need to do is to load my given texture, a skybox texture ...
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0answers
13 views

How to do an xBR or hqx filter in MonoGame?

I have been trying to implement an HD filter (xBR or HQX) in my MonoGame game project but so far got no success. I have checked out this question, but the shaders provided in the answers don't seem to ...
0
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1answer
29 views

Problem with stencil in directx 12

I'm trying to use stencil buffer in directx 12. I have problem that probably is really easy to solve. So, it's look like dx12 ignore it, ClearDepthStencilView() affect only depth, writing to stencil ...
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1answer
75 views

Doing legacy DirectX Coding on Windows 10

I decided to study couple of old computer graphics books like Andre LaMothe's Tricks of 3D Game Programming Gurus. I feel like this book is full of great general computer graphics knowledge and I want ...
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0answers
51 views

Game crashes when sound is finished

I'm trying to code a simple audio playback test game (which will be used in my actual project), and everything works fine, except for the fact that after the audio has finished playing, the game will ...
3
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1answer
99 views

Sine-based Tiled Procedural Bump

I am trying to implement this formula to generate bump but I am facing some issue. The result doesn't look the same it's much darker. Here is my result (without same parameters) but it is much ...
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0answers
30 views

How to draw SharpDX 2D Bitmap Outline

i want drawing bitmap outline Now Drawing Device.DrawBitmap(mBitmap, GetBound(), Opacity, d2.BitmapInterpolationMode.Linear); // mBitmap as SharpDX.Direct2D1.Bitmap // GetBound() as Bitmap Bound ...
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1answer
64 views

Rotating A model in 3D so it matches its direction of movement

So I have a model of a spear and when it gets thrown I want to set the orientation of the spear to its direction. ( I also want to use this for other things like bullets pointing in the direction ...
2
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1answer
61 views

Setting oblique projection to data visualization

I'm developing a small application using Directx intended to plot frequency spectra data in a waterfall plot. It should look like this: So far, I managed to created most of the chart ...
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1answer
73 views

Windows 10 User has only DX 10.1 API

A user of ours has an issue whereby they cannot run our application, which requires DX11 API support and hardware support for DX10.1. The strange this about this issue is that the user is running ...
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0answers
29 views

D3D11 Weird Tessellation patterns

I'm having a very peculiar problem regarding quad-patch tessellation. I'm building a planetary renderer using spherified cube and chunked LOD (6 quadtrees, 1 per original cube face). I have reached a ...
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0answers
47 views

Converting ARGB surface to NV12 surface

I'm trying to use NVENC to encode some frames that I'm capturing from a game. I've hooked EndScene() and I can get the data from the backbuffer, which is in ARGB format. Unfortunately, NVENC only ...
0
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1answer
26 views

Is it possible to use mipmaps with dynamic textures in Dirext 11?

I was trying create a texture with D3D11_USAGE_DYNAMIC and MipLevels equal to 0 (to create all the mip levels). However, the texture failed to be created. Is it possible to use mipmaps with dynamic ...
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0answers
23 views

Dynamic Shader Linkage in DirectX12?

Do the dynamic shader linking concepts introduced in DirectX11 ShaderModel 5.0 still work in DirectX12? In the documentation the reflection API is still available (e.g. ID3D12LibraryReflection), ...
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1answer
77 views

FBX SDK - Animation not Correctly Displaying in Game

This issue seems to arise with joint rotation animation. If anybody knows how to help, it would be greatly appreciated. ...
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0answers
20 views

How to get tearing-free present with D3D9 in windowed mode without DWM?

For a long time now I have assumed that it's impossible to get tearing-free presents with: Windows 7, no DWM (=Aero off), D3D9, windowed mode. However, my Windows 7 PC at work just does it. My ...
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0answers
29 views

Translate D3DXMatrixLookAtLH to Unity compatible code

I am currently trying to port a really old Game (I have the source of it) to Unity as a fun project. And I'm currently stuck with the object rotation techniques in Unity compared to the ones used in ...
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0answers
64 views

Why does reverse depth buffering provide more precision? (with DXGI_FORMAT_D24_UNORM_S8_UINT Datatype layout)

I lately came around methods optimizing the use of the depth buffer, as the easiest solution reverse depth buffering is mentioned but I cannot wrap my head around why I would be gaining a better depth ...
1
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1answer
49 views

How can I access the members of XMVECTOR?

So I have been reading these articles, and I find implementing them a trouble. Currently, all I am trying to do is add two vectors together, leaving my question more specifically this: How can I add ...
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0answers
33 views

Screen Size 2D Gameboard Background

I am trying to get the screen size of the current monitor and then render the game board to match the screen orientation but currently I am scaling the game board to a larger size which not the best ...
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0answers
27 views

Getting texture data manually with proper alignment

I was building a simple D3D12 app which load and display an image on screen. As you are aware, D3D12 has no calls like CreateTexture2D which we have in D3D11 so that this process has to be done in ...
2
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2answers
71 views

Calculate matrix transformation components separately

It is possible to calculate the translation, rotation and scale that were used to build a matrix? I mean if I have a matrix M can I calculate the rotation, scale, and translation it represents? Of ...
1
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2answers
42 views

Shader models, when to use “ps_4_0_level_9_x” instead of “ps_4_0”

I've made a very simple post processing shader for my 2D game. It produces scanlines by dimming every other line. For this I use the position of the pixel on the screen. When using ps_4_0_level_9_3, ...
16
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1answer
184 views

Flowing GPU compute water

I have a civil engineering background and perform hydraulic and hydrologic analysis' regularly. They sell degrees for that sort of thing, but it's really not rocket science. I recently got it in my ...
0
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1answer
76 views

directX rotation of a 3d cube inconsistent

i'm trying to develope a simple 3d cube in directX that can be rotated in any direction by dragging the mouse. It works in the following way: i drag the mouse to the right or left, and the cube ...
0
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1answer
22 views

GL_TEXTURE_MAX_LEVEL equivalent on DirectX

I'm trying to mix atlas and mipmapping for a kind of Minecraft editor I'm doing. Everything looks good until I reach the smaller mipmaps of the atlas texture, where obviously all the textures are ...
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1answer
51 views

Compute shader in directx 12? [closed]

I was just wondering since directx 12 is out does it have a compute shader like directx 11??? Ive tried searching and didn't find anything.
2
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1answer
60 views

How to get depth of vertex in 0 - 1 range

I want to get the depth of vertex in 0 to 1 range(like it done in the shader) and I do it like this D3DXVec3TransformCoord(&vertex, &vertex, &wvp); depth = vertex.z; It ...
1
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1answer
67 views

How does one calculate color intensity?

How do I calculate color intensity if I have a image sample of RGB? The sample is of a float3 of red, green, blue. I'm trying to do a bilateral blur and have to not change the image if the color ...
6
votes
1answer
181 views

How can I speed up this HLSL shader?

I have written a lighting shader file that is used as the fragment shader part of a deferred lighting pipeline. Unfortunately, each iteration seems to be adding 0.5ms to my frame time, so any more ...
1
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2answers
137 views

How to rotate camera using mouse?

I'm looking for a basic example of rotating camera using the mouse. the only problem is I'm not sure of how to rotating the camera around it target. should i do this by an algorithm or is there a ...
0
votes
1answer
50 views

Storing and rendering Mesh Data in stl container

I'm trying to refresh my DirectX11 knowledge, and ran into a problem while trying to render multiple meshes instanced. What I want to do is give my ObjectManager class the name of an .obj file and it ...
4
votes
2answers
53 views

DirectX11 Using Multiple Shaders

I currently have a scenario where I am rendering terrain with a shadow map. I have two passes, one for the depth buffer to create the shadow map (which is rendered to a texture) and a second that ...
0
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0answers
45 views

DDS DXT5 texture doesn't render alpha correctly

I have an issue with how dxt5 textures render alpha. I have a source png with alpha gradients which is converted to dds with NVidia tools. Then is loaded in engine correctly but shows alpha pixels ...
3
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1answer
64 views

Vertex normals in the geometry shader using directx

I'm in directx 11 with the geometry shader. Is is possible to calculate vertex normals? Just one like segment per vertex? In the geometry shader? I did vertex normals per face, this is what I got, ...
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0answers
21 views

Cannot obtain correct bone transform matrix data

I tried to obtain bone transform matrix for animation implemented with Directx11 and FBX sdk. I found this function in some web resources: fbxCluster->GetLink()->EvaluateGlobalTransform(); // ...