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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Real time reflections
I just had a quick look at the new Crysis 2 DX11 update, and was quite surprised by some of the new features, especially the real time reflections on moving models. From what I could gather, there are ...
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2answers
2k views
DirectX Overlay
I have been a code in full convertion mods for the source engine, but now im mostly coding C# applications. That provide utilties for games, during this proccess i have often wanted the ability to do ...
4
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2answers
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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 ...
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2answers
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How Often do you change Vertex/Index/etc Buffers?
So im still learning but I think i've got a grasp of most things DX11 (Well....beginner things) And I REALLY do apologize for all the questions.....but I'd rather understand EVERYTHING before I move ...
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1answer
186 views
Applying an outline effect to primitives
I am trying to draw an outline on a collection of quads in Direct3D. I have three intersecting quads on the same plane in the following configuration:
(The different colors here are just to ...
4
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1answer
184 views
Is it possible to programmatically prevent a game from pausing when its window loses focus? [closed]
I'm playing Skyrim in windowed mode and I am trying to create a bot for this game for personal use. I would like to have the bot play the game in the background, while I do other things, the only ...
4
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1answer
555 views
Problem with DirectX scene-graph
I'm trying to implement a basic scene graph in DirectX using C++. I am using a left child-right sibling binary tree to do this.
I'm having trouble updating each node's world transformation relative to ...
4
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1answer
282 views
Zooming into Mouse Position
I'm trying to implement my camera class for a simulation. But I cant figure out how to zoom into my world based on the mouse position. I mean the object under the mouse cursor should remain at the ...
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6answers
1k views
What is the easiest and shortest way to draw a 2d line in c/c++?
I am fairly new to c/c++ but I do have experiance with directx and opengl with java and c#. My goal is to create a 2d game in c with under 2 pages of code. Most of what I have seen requires 3 pages of ...
3
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7answers
5k views
GUI for DirectX
I'm looking for a GUI library built on top of DirectX- preferably 9, but I can also do 11. I've looked at stuff like DXUT, but it's way too much for me- I'm only needing some UI controls which I would ...
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votes
3answers
3k views
Value of the Game Institute Courses
I'm considering purchasing courses from Game Institute, specifically, the Foundation Studies Package. Has anyone here taken their courses? If so, do you feel they are a good value? If you can, please ...
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2answers
370 views
Render only some of graphics?
In XNA I am building my own textbox, and listbox.
For the textbox, I want it to render all text it can, and then cut off at the end of the textbox. But I don't want it to cut whole letters. I want it ...
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4answers
811 views
How do I convert DirectX's .X from binary encoding to text encoding and back
As far as I know, .X format can be text encoded and binary-encoded.
I basically want to look into the model I'm playing with, get a better understanding of .X, possibly make some changes in it and ...
3
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1answer
256 views
Spherical to Cartesian Coordinates
Well I'm reading the Frank's Luna DirectX10 book and, while I'm trying to understand the first demo, I found something that's not very clear at least for me. In the updateScene method, when I press A, ...
3
votes
3answers
467 views
How do I Fallback to Older DirectX Versions?
I had a feeling that it would be easier to tackle this problem before I got too deep into development (unless, of course if that's a bad idea/the hard way, please inform me...). I'm creating my game ...
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1answer
286 views
Simplex Noise flat land and hills
I'm using the simplex noise to create Minecraft like terrain.
I can only achieve hills like this.
Does anyone know how to use simplex to make more dynamic landscapes?
3
votes
1answer
3k views
How do I integrate bullet physics into my game?
I downloaded the release file found here, but I'm just not sure where to start. In my game I have a number of oblongs and a sphere, I want all of these to collide with one another. (They all have ...
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2answers
406 views
Why does the D3DXCOLOR structure not work as I expect?
I looked up some R G B values for certain colours, such as "Indian red" for example, which has the RGB values (238, 64, 4).
If I use those values into a D3DXCOLOR structure like this: D3DXCOLOR(238, ...
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2answers
702 views
Creating Font Textures in Direct3d without D3DX
Update: The completed solution using Nathan Reed's answer is posted in my answer below
A few open source programs I've seen that render installed fonts do something like this...
Create a texture for ...
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2answers
2k views
How can I draw multiple lines connected via “nodes” with SlimDX?
I currently read out XML data with the following scheme: Position x,y,z
I try to add one new Vertex for each position node and add it to a Vertex array.
Then I try to render this list of vertices so ...
3
votes
3answers
678 views
What do you need to know in C++ before starting to program with DirectX
I was wondering what do you need to know in C++ before starting to program with DirectX?
I have only been programming in C++ (more for 2D games using SDL and learning the basics) for just over a ...
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3answers
279 views
When to return a reference and when to return a copy?
I was looking at the d3dx math .h and noticed that a difference between the "+" and "+=" operators:
D3DXVECTOR3& operator += ( CONST D3DXVECTOR3& );
D3DXVECTOR3 operator + ( CONST ...
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1answer
166 views
Matrix in constant buffer on the GPU contains NaNs but not on the CPU
I've got a shader with the following constant buffer:
cbuffer ShaderParameters
{
matrix inverseViewProjectionMatrix;
float4 cameraPosition;
};
When using Visual Studio 2012's graphic ...
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, ...
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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 ...
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2answers
193 views
How to reconcile depth ordering with minimal shader context changes?
We generally want to minimise shader-program switches (glUseProgram and all associated context changes) for the sake of performance. AFAIK it is not uncommon to render by shader program, i.e. group ...
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2answers
760 views
Where have the cross and dot products gone in DirectX10?
In D3D9 there were functions to deal with D3DXVECTOR3's in order to calculate dot and cross products. However these have disappeared from the math library in D3D10.
I assume they must have gone ...
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votes
2answers
1k views
How does one write to another process's OpenGL/DirectX context?
I want to write a short of chat client that display the messages in-game (OpenGL/DirectX), but I really don't know how to handle this.
It is easy to write my client in my graphic context... but what ...
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2answers
1k views
What is the “DirectX for Managed Code Update”?
I came upon this site while looking for information about working with DX in managed code and saw that MS released something containing a 'DirectX for Managed Code Update'.
This sounds promising but ...
3
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2answers
436 views
loading 3d model data into buffers
I am using assimp to load 3d model data. I have noticed that each loaded model is made up of different meshes. I was wondering should each mesh have it's own vertex/index buffer or should there just ...
3
votes
1answer
727 views
WM_PAINT and Direct3D
I've seen people who've written in code where the graphics of a scene are rendered in response to WM_PAINT. I only ever rendered the scene once all Windows messages were done translating, and then ...
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1answer
181 views
Per Instance Textures, and Vertex And Pixel Shaders?
How do you implement per instance textures, vertex shaders, and pixel shaders?
Given:
1. Two different model templates in Vertex Buffer, Square & Triangle
2. Instance Buffer with [n] instances of ...
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votes
1answer
505 views
In HLSL pixel shader , why is SV_POSITION different to other semantics?
In my HLSL pixel shader, SV_POSITION seems to have different values to any other semantic I use. I don't understand why this is. Can you please explain it?
For example, I am using a triangle with the ...
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2answers
1k views
Pix for visual studio express 2012 (Desktop)
(Originally asked on stackoverflow)
Using visual c++ express 2010 for direct3d you have to download the directX sdk and there is a tool called pix for debugging shaders, looking at 3d resources etc.
...
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1answer
197 views
D3DXMatrixDecompose gives different quaternion than D3DXQuaternionRotationMatrix
In trying to solve this problem, I tracked down the problem to the conversion of the rotation matrix to quaternion. In particular, consider the following matrix:
-0.02099178 0.9997436 -0.008475631 0
...
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1answer
2k views
How can I load .FBX files?
I am looking into options for the model assets for my game. I have gotten pretty good with Blender, and want to use C++/DirectX9 (don't need all the excess from 10+), but Blender 2.6 exports .fbx not ...
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votes
1answer
771 views
How do I create a decal system?
I'm currently given the task to design & create a simple decal-system in C++/DirectX.
Does anybody know a great tutorial, article or paper to start with? (Especially the part about 2D-texture to ...
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1answer
105 views
Capturing a programs performance
I'm trying to capture the performance of the GPU, CPU, FPS and memory usage on a program I'm currently working with and want to avoid having to write my own performance capture stuff. Does anyone know ...
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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, ...
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votes
3answers
2k views
How do I plot individual pixels using the XNA APIs?
If I wanted to fill my game screen with individually coloured pixels, how would I do this?
For example, if I wanted to write a 'game of life'-type game where each pixel was a cell, how would I ...
3
votes
2answers
64 views
using DirectX to generate a sprite sheet
I am building a site in HTML5 for my client and it must run on the iPad/iPhone (i.e. Safari on iOS).
They want a 3D effect where they have a simple, yet, specific product they want to show on the ...
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votes
1answer
394 views
creating a UI menu in c++
Im currently working on a 2D Game where the users can interact with specific nodes and are able to edit certain bits of information and I also plan for the users to be able to click buttons to set ...
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1answer
164 views
Why are some objects not rendering properly?
Here's a button I exported from Blender into a .x format:
Now here it is in the game with BasicEffect applied to everything:
And now with my custom shader:
And there's the problem. While the ...
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;
...
3
votes
1answer
116 views
blurry image rendered
I'm using Direct2D to render a PNG image using a ID2D1BitmapRenderTarget and then caling it's GetBitmap() function and rendering the image using ID2D1HwndRenderTarget::DrawBitmap().
Some of the ...
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2answers
113 views
How can I simulate multiple depth channels?
Here's what I'd like to achieve:
Rendering a first pass of objects in my scene, using standard depth comparison
Rendering another pass of objects in the same scene, but with the following rules:
A ...
3
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1answer
266 views
Proper use of Dynamic Vertex Buffers for rapid update
I am creating a C#/SharpDx/DirectX10 application to plot line charts in a fast way.
I have a prototype which uses Dynamic Vertex Buffers and fills a fixed-size buffer, say 1M vertices, with new data ...
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votes
2answers
311 views
CreateRenderTarget returns 0x80070057 in big surface resolution
I have created the SLI merged desktop of three 1920x1680 monitors, so the desktop resolution is 5760x1080.
There is a 0x80070057 error, while calling CreateRenderTarget to create the RT_Surface:
...
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2answers
496 views
How to mix textures in DirectX?
I am new to DirectX development and I am wondering if I am taking the wrong route to achieve the following:
I would like to mix three textures which contain transparent areas and some solid areas ...
3
votes
1answer
178 views
Preventing banding textures in DirectX
I have a 3D scene that I've tried rendering in Direct3D 10 and using WPF's 3D framework. Obviously, going directly to Direct3D is producing far better performance but I am getting banding which ...
