DirectX 11 is the latest release of Microsoft's collection of APIs which contain features to aid in game development.
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44 views
When should I set a texture as a shader resource in order to read it?
I'm writing a Direct3D 11 HLSL shader with SharpDX. What I want to do is write the depth to a texture in one pass and read it in the next one. After declaring the texture, do I have to set the depth ...
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1answer
41 views
How do I draw an isoline in a shader with a triangle topology?
I have some problems with my displacment. So I would like to have a simple little isoline starting in every triangles face center of the mash pointing in the direction of the corresponding faces ...
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1answer
37 views
Creating a 2D texture array for depth view
Following my question here, I decided to create an 2D texture array for all of my depth screen texture so that I can use them for shadows for all my lights.
I'm having an issue setting it up, I'm ...
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1answer
39 views
How to create and populate a 2D Texture Arrays in DirectX11
I have generated a bunch of ID3D11ShaderResourceView that are a 2D textures that have a depth map screen shot for my lights shadows. I would like to take all of these textures and put them into a ...
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2answers
35 views
How do I deal with timeout detection and recovery in D3D?
What is exactly measured when checking TDR in Windows? What do I need to do in my D3D11 app to tell TDR that long rendering is okay? I've already split the workload into smaller batches, but how do I ...
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3answers
38 views
how do I modify Texture2DArray values in shader
I'm using HLSL Shader Model 5.0. I'm using a Texture2D with the vertex positions for a mesh. In the Shader I'm trying to displace patchepositions along the normal of the patches I'd like to actualize ...
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2answers
93 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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1answer
114 views
Multiple pixel shader passes
I currently have a pixel shader that calculates the texture and I have another that calculates the light. I want another shader that does both. What I would ideally like to do is instead of creating a ...
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19 views
Approximating Subdivision Surfaces with Gregory Patches for Hardware Tessellation
I'm trying to implement the approach (http://research.microsoft.com/en-us/um/people/cloop/sga09.pdf).
Unfortunately I'm not quite clear regarding the formulas in chapter 3, I am hoping to get some ...
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1answer
95 views
How to print Depth to a Texture2D and then read it in the next pass on a shader in DirectX11
I'm programming a two-pass effect in DirectX 11 (SharpDX). It's supposed to write the depth to a texture in the first pass and then use that texture to extract data on the second one in the pixel ...
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1answer
39 views
Difference between texture.Load() and texture.Sample() methods in DirectX?
The question is simply that: What is the difference between texture.Load() and texture.Sample() in DirectX?
I've used a Texture2D to store the depth in a pass of a DirectX Shader (with SharpDX), and ...
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2answers
55 views
Alpha interpolation in a pixel shader
How does the interpolation in a fragment shader work when it comes to the alpha parameter?
I'm programming a shader with SharpDX, DirectX11. My idea is to interpolate 2 3d points of a segment, so ...
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1answer
66 views
How can I find a position between 4 vertices in a fragment shader?
I'm creating a shader with SharpDX (DirectX11 in C#) that takes a segment (2 points) from the output of a Vertex Shader and then passes them to a Geometry Shader, which converts this line into a ...
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1answer
63 views
DirectX11 Swap Chain RGBA vs BGRA Format
I was wondering if anyone could elaborate any further on something that's been bugging me.
In DirectX9 the main supported back buffer formats were
D3DFMT_X8R8B8G8 and D3DFMT_A8R8G8B8 (Both being BGRA ...
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3answers
125 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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1answer
75 views
Direct3D11 and SharpDX - How to pass a model instance's world matrix as an input to a vertex shader
Using Direct3D11, I'm trying to pass a matrix into my vertex shader from the instance buffer that is associated with a given model's vertices and I can't seem to construct my InputLayout without ...
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1answer
109 views
Reversing animated sprites
I have created a sprite sheet of which consists of 6 frames with a character moving legs each frame, now I have coded it so that the animation is running successfully from frame 1 to 6, however I am ...
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19 views
Why isn't one of the constant buffers being loaded inside the shader?
I however got the model to load under tessellation; only problem is that one of the constant buffers aren't actually updating the shader's tessellation factor inside the hullshader.
I created a ...
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1answer
39 views
An issue with tessellation a model with DirectX11
I took the hardware tessellation tutorial from Rastertek and implemended texturing instead of color. This is great, so I wanted to implemended the same techique to a model inside my game editor and I ...
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1answer
108 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
103 views
Resource management
I've come across a strange thing in DirectX 11:
I'm trying to implement large scale volume visualization engine.
My approach is like this:
if the volume is HUGE (could not fit to GPU memory ...
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1answer
92 views
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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43 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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3answers
195 views
Working With D3D11/OpenGL Shader Reflection
I've been working in my off-time to do some system design for a game engine as a fun and challenging project, and i've hit a bit of a wall. I've made an interface which is a renderer that i try to ...
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1answer
85 views
Storing few values in an int - small gain
This might be a bit hard-to-answer question, but... I had a DirectX::XMFLOAT3 as a vertex attribute. I have changed it to just an int by placing the 3 floats into int (using only 8 bits per float). In ...
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2answers
187 views
SharpDx how to detect if Mouse Button is pressed?
I'm wondering how it's possible to detect if a mousebutton is pressed or released.
var di = new DirectInput();
_mouse = new Mouse(di);
_mouse.Acquire();
_mouseState = _mouse.GetCurrentState()
All I ...
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3answers
151 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
136 views
Can I change vertex buffer's size?
Maybe it's a stupid question but I actually don't know - is it possible to change vertex buffer's size after it's been already created (with CreateBuffer())? If so, how do I update its data (with both ...
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1answer
68 views
D3D11 Deferred Context CommandList Reset
a rather quick question, I am starting on implementing rendering with deferred context into my game engine, and came across a heavy memory leak when recording command lists on my deferred contexts. ...
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2answers
78 views
Unused constant buffers in shaders
If you define a constant buffer in a shader, for example
cbuffer test : register(c2)
{
float4x4 data;
}
But never actually use the data in the shader, does that incur any runtime cost at all?
...
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1answer
30 views
How can I check the shader model capabilities of an adapter?
I'm writing an application that targets Direct3D11 (through SlimDX) and shader model 5.
When I'm running it on a system that doesn't have SM5 capable hardware, I will get a NullReferenceException ...
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2answers
99 views
Is it possible to update constant buffers/textures/variables by name?
When I was learning OpenGL (some old version), the way to update variables in shader was to find their index or whatever by name (string) and then use that index to actually update them. And I've seen ...
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2answers
158 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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1answer
181 views
Vertex Buffer Sharing between DirectX11 and Directx9
In my d3d9 engine i want to take benifit of compute shader of d3d11. So firstly I created a vertex buffer in d3d11 with D3D11_BIND_UNORDERED_ACCESS and then tried to create the d3d9 vertex buffer ...
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0answers
82 views
Box Zoom - Fit to rectangle
I want to box select a section of my screen and then zoom in that selection. So I have four corner points (my rectangle which I can drag with the mouse) in pixel coordinates. I have a perspective ...
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1answer
148 views
Adding false if statement to pixel shader produces a lag
One of lines in pixel shader produces a lag (lower fps). I can't understand why.
if (TextureEnabled)
color *= texDiffuse.Sample(texDiffuseSam, input.UV);
Interesting fact is: TextureEnabled is ...
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3answers
195 views
XNAMath: Question on types XMFLOAT3/4, XMVECTOR (D3D 11)
I don't want to use XMVECTOR which i currently use in my DirectX 11 C++ game code.
Because it is too much for me in memory.
I want to use XMFLOAT3 or 4, but the problem is there is no matrix/vector ...
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2answers
244 views
First person camera: problem
I have created a simple camera class, moved it from my C# (XNA) source to C++ for d3d.
Commonly it is okay, but something is wrong with rotation.
If i increase its pitch/yaw values, according to ...
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1answer
151 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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1answer
215 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 ...
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1answer
135 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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2answers
201 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 ...
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1answer
161 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 ...
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1answer
737 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 ...
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0answers
83 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 ...
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0answers
48 views
Directx Texturing problem
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 ...
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103 views
DirectX Tutorial code not working
I've been reading the tutorials for DirectX 11 at http://www.directxtutorial.com/Lesson.aspx?lessonid=11-4-5. I've run the code after every lesson, but it didn't work for lesson 5. The error looks ...
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1answer
180 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 ...
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1answer
143 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 ...
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1answer
77 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.
