DirectX 11 is the latest release of Microsoft's collection of APIs which contain features to aid in game development.
3
votes
1answer
132 views
Depth Stencil buffer mandatory?
If I disable depth and stencil buffering, do I have to create and set the depth stencil buffer?
3
votes
4answers
889 views
How best to handle ID3D11InputLayout in rendering code?
I'm looking for an elegant way to handle input layouts in my directx11 code.
The problem I have that I have an Effect class and a Element class. The effect class encapsulates shaders and similar ...
1
vote
1answer
610 views
DX11 application running on Windows XP using only DX9?
I'm developing an application that utilizes DX11. I know that DX11 is only available on Windows 7 (and Vista with SP). I wonder if there is some way to run the application on Windows XP and use only ...
0
votes
2answers
149 views
HLSL compiler specification (optimizations)
Can I read somewhere about optimizations that HLSL compiler performs?
For example, in some codes I have different variables that get a constant value (just to let myself adjust the shader with other ...
1
vote
0answers
67 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 ...
1
vote
1answer
133 views
Is my idea of how to use matrices to layer 2D on top of 3D correct?
I'm new to using matrices, so I'd like some input on whether I've understood the use of them in the context described in the title.
Right now I have a small Direct3D 11-based game engine which ...
0
votes
4answers
435 views
What is the format of DXGI_FORMAT_D24_UNORM_S8_UINT?
I'm trying to read the values in a depth texture of type DXGI_FORMAT_D24_UNORM_S8_UINT.
I know this means "24 bits for depth, 8 bits for stencil" "A 32-bit z-buffer format that supports 24 bits for ...
0
votes
1answer
79 views
How do I get buffers from another class for CreateBuffer
I believe this is not strictly specific to DirectX but just to pure c++ language problem.
I have a class (simplified):
class A {
public:
ID3D11Buffer* getVBuffer() const {
return ...
1
vote
1answer
100 views
How can I render primitives to pixel coordinates?
I'll emphasize that I am very new to graphics programming. I've been using XNA up until now and I've been looking for a way to build simple 2D functionality with textured quads. I'm sort of starting ...
1
vote
2answers
206 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 ...
2
votes
1answer
83 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 ...
4
votes
1answer
209 views
How do I use threads together with DirectX11?
I have only found the documents on MSDN: http://msdn.microsoft.com/en-us/library/windows/desktop/ff476884(v=vs.85).aspx Although it doesn't say anything about creating them, it mentions that device is ...
0
votes
1answer
110 views
Running advanced floating point calculations on the GPU?
I want to learn how to use AMD Stream and NVIDIA CUDA (PhysX) to calculate things such as locations. I have not yet found where to get the SDK for these (I can't test the CUDA things because I have a ...
3
votes
1answer
944 views
DirectX11, how to properly update a staging buffer with a structured buffer's count using CopyStructureCount
Alright, I'm not quite sure what is going on with my code at the moment.
I'm currently getting around to defining behavior for my particle system, and to better do this I need to know how many ...
0
votes
0answers
40 views
Transform a Screen Delta
I have a delta in screen coordinates that I want to transform to a 3d delta in world space.
The delta is in this case a movement across the (x,y) coordinates in screen space on the near projection ...
3
votes
1answer
134 views
What happens to a D3D11 application when Windows hibernates?
In D3D9 there was the concept of a "device reset". When a device reset occurred textures created with D3DPOOL_DEFAULT had to be recreated, but textures created with D3DPOOL_MANAGED didn't, because, ...
2
votes
0answers
355 views
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 ...
3
votes
1answer
147 views
DirectX Unproject troubles
I have an orthographic projection and I try to unproject a point from screen space.
Following are the view and projection matrices:
var w2 = ScreenWidthInPixels/2;
var h2 = ScreenHeightInPixels/2;
...
1
vote
0answers
85 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 = ...
1
vote
3answers
431 views
How do you rotate a cube map?
I'm looking for suggestions on this
Say you have a cube map. You want to rotate it as efficiently as possible.
You can render the cube map, rotate the camera, and render the scene to another cube ...
4
votes
2answers
251 views
ConsumeStructuredBuffer, what am I doing wrong?
I'm trying to implement the 3rd exercise in chapter 12 of Introduction to 3D Game Programming with DirectX 11, that is:
Implement a Compute Shader to calculate the length of 64 vectors.
Previous ...
5
votes
1answer
219 views
Tessellation Texture Coordinates
Firstly some info - I'm using DirectX 11 , C++ and I'm a fairly good programmer but new to tessellation and not a master graphics programmer.
I'm currently implementing a tessellation system for a ...
1
vote
1answer
106 views
Texture the quad with different parts of texture
I have a 2D quad. Let say it's position is (5,10) and size is (7,11).
I want to texture it with one texture, but using three different parts of it.
I want to texture the part of quad from x = 5 to x ...
3
votes
1answer
143 views
Mapping dynamic buffers in Direct3D11 in Windows Store apps
I'm trying to make instanced geometry in Direct3D11, and the ID3D11DeviceContext1->Map() call is failing with the very helpful error of "Invalid Parameter" when I'm attempting to update the ...
1
vote
3answers
171 views
relationship between the model and the renderer
I tried to build a simple graphics engine, and faced with this problems:
i have a list of models that i need to draw, and object (renderer) that implements IRenderer interface with method ...
25
votes
3answers
6k views
How does hardware tessellation work?
I would just like someone to explain in relativly clear terms how hardware tessellation works considering it is the new buzzword with DX11.
Thanks.
1
vote
0answers
275 views
Need help transforming DirectX 9 skybox hlsl shader to DirectX 11
I am in the middle of implementing a skybox to my game. I have been following this tutorial http://rbwhitaker.wikidot.com/skyboxes-2. I am using MonoGame as a framework and in order to support both ...
12
votes
2answers
865 views
Is it possible to construct a cube with fewer than 24 vertices
I have a cube-based world like Minecraft and I'm wondering if there's a way to construct a cube with fewer than 24 vertices so I can reduce memory usage.
It doesn't seem possible to me for 2 reasons: ...
4
votes
1answer
141 views
Deferred contexts and inheriting state from the immediate context
I took my first stab at using deferred contexts in DirectX 11 today. Basically, I created my deferred context using CreateDeferredContext() and then drew a simple triangle strip with it.
Early on in ...
1
vote
1answer
114 views
Direct2D gamma correction
I'm using direct2d and direct3d together and having an issue with gamma correction. My direct3d backbuffer is using an SRGB format and when I render images from direct2d onto the direct3d surface, ...
5
votes
1answer
302 views
Partial Shader Signatures HLSL D3D11 C++
I had been debugging a problem I was having in a single shader file with 2 functions in it. I'm using DirectX 11, vs_5_0 and ps_5_0. I have stripped it down to its basic components to understand what ...
0
votes
1answer
366 views
Building View Matrix in Direct3D11
Am I doing it right? I converted this.
m_ViewMatrix = XMMatrixLookAtLH(XMLoadFloat3(&m_Position), lookAtVector, upVector);
to this one.
XMVECTOR vz = XMVector3Normalize( lookAtVector - ...
0
votes
1answer
664 views
Changing the culling mode in the HLSL effect
I'm writing a cel-shading effect in HLSL and Direct3D 11, and I need to be able to flip the culling mode on the outline pass of the effect. I know you do this in XNA by setting CullMode to CW or CCW ...
0
votes
0answers
232 views
C++ Directx 11 D3DXVECTOR3 doesn't allow me to devide it [closed]
If i have a simple vector3 like this:
D3DXVECTOR3 inversevector = D3DXVECTOR3( (pos+lookat_pos));
It works perfect!
But let's say i wanted to multiply it by:
Speed*(float) timeHandler.GetDelta()
...
4
votes
1answer
1k views
Is the new windows 8 sdk usable with visual c++ express 2010 on windows 7?
This is inspired by and related to Is the June 2010 DX SDK really the latest? asked recently but it's a different question.
I won't likely be purchasing the full visual studio 2012 for C++, I intend ...
4
votes
2answers
230 views
How do I use D3DXVec3Unproject with D3D11?
I'm having a small issue with D3DXVec3Unproject. I'm currently using Direct3D 11 and not 10, and the signature for this function is:
D3DXVECTOR3 *pOut, CONST D3DXVECTOR3 *pV, CONST D3D10_VIEWPORT ...
3
votes
2answers
213 views
Having the same texture data in different ID3D11Texture2D
Sorry if this has been answered elsewhere - I'm rather new to DX. My question concerns conservation of resources - specifically textures in VRAM. I assume that upon returning from a call to ...
2
votes
1answer
178 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 ...
1
vote
1answer
211 views
ERROR #342: DEVICE_SHADER_LINKAGE_SEMANTICNAME_NOT_FOUND
I've stared at this for at least half an hour now and I cannot figure out what directx is complaining about. I know this error normally means you put float3 instead of a float4 or something like ...
0
votes
1answer
346 views
How to set sprite source coordinates?
I am creating own sprite drawer with DX11 on C++. Works fine but I dont know how to apply source rectangle to texture coordinates of rendering surface(for animation sprite sheets)
...
2
votes
2answers
414 views
How do I keep a triangle strip between geometry shader invocations?
I'm using a small geometry shader to build a "ribbon" from a set of points. For each point, I create 4 vertices that represent a section of the ribbon:
[maxvertexcount(4)]
void GS( point GS_Input ...
3
votes
3answers
414 views
How can I view an R32G32B32 texture?
I have a texture with R32G32B32 floats. I create this texture in-program on D3D11, using DXGI_FORMAT_R32G32B32_FLOAT. Now I need to see the texture data for debug purposes, but it will not save to ...
13
votes
4answers
2k views
how does HDR work?
I'm trying to understand what HDR is and how it works.
I understand the basic concepts and have an slight idea of how it is implemented with D3D/hlsl.
However it's still pretty foggy.
Say I'm ...
2
votes
1answer
1k views
Does the latest DirectX SDK support both Direct3D 9.0c and 11?
1) What is the latest version of DirectX SDK?
2) For my purposes I need DirectX 9.0c SDK and DirectX 11 SDK. Do I need to install these libraries separately or last DirectX SDK package contains both ...
0
votes
0answers
164 views
What's a good way to organize samplers for HLSL?
According to MSDN, I can have 4096 samplers per context. That's a lot, considering there's only a handful of common sampler states.
That tempts me to initialize an array containing a whole bunch of ...
1
vote
0answers
75 views
InputLayout handling
Where are you supposed to store InputLayout?
Suppose i have some basic structure like.
class Mesh
{
List<MeshPart> MeshParts
}
class MeshPart
{
Effect Effect;
VertexBufferBinding ...
6
votes
1answer
293 views
How do I get FEATURE_LEVEL_9_3 to work with shaders in Direct3D11?
Currently I'm going through some tutorials and learning DX11 on a DX10 machine (though I just ordered a new DX11 compatible computer) by means of setting the D3D_FEATURE_LEVEL_ setting to 10_0 and ...
3
votes
2answers
3k views
Mapping a Vertex Buffer in DirectX11
I have a VertexBuffer that I am remapping on a per frame base for a bunch of quads that are constantly updated, sharing the same material\index buffer but have different width/heights. However, ...
0
votes
2answers
205 views
DX11 - Weird shader behavior with and without branching
I have found problem in my shader code, which I dont´t know how to solve.
I want to rewrite this code without "ifs"
tmp = evaluate and result is 0 or 1 (nothing else)
if (tmp == 1) val = X1;
if (tmp ...
4
votes
1answer
274 views
Does changing a Rasterizer State affect every object (model) on the screen?
Quick easy question. When setting a Rasterizer State (like for example wireframe).....does that affect every object (model) on the screen?
For example, let's pretend I have 2 cubes. I use:
...
