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.

learn more… | top users | synonyms (1)

1
vote
1answer
196 views

Does HLSL implement Shader Model LOD instruction?

The DX Shader Model 5.0 has a lod instruction. It returns "the LOD (level of detail) that would be used for texture filtering". Does HLSL have a built-in intrinsic that can do the same? I know I ...
0
votes
2answers
245 views

DirectX11 Linker error

I'm in the process of learning DirectX and in the examples supplied with the book I get the following error: Error 29 error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match ...
0
votes
1answer
484 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 ...
0
votes
1answer
387 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 ...
2
votes
1answer
70 views

When should I clear an auxilliary render target?

I'm using a few different render targets in my game in addition to the back buffer. These other render targets are only used in a few places, for specific tasks. I'm wondering when I should be ...
0
votes
2answers
146 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 ...
1
vote
1answer
130 views

How do I create an efficient long, pannable, sprite-animated scene in a Windows Store game?

I am creating my first Windows Store application in XAML, and I cannot seem to find a proper example for the requirements I have. The basic idea of the app is to have a large scrollable canvas which ...
0
votes
2answers
141 views

Accesing depth buffer from shader

I read this presentation and on 6th slide I found that is not need to use multiple render targets and depth can be taken directly from depth buffer. From which version of DirectX or OpenGL can be ...
0
votes
1answer
149 views

Why isn't my other two constant buffers being updated to the shader?

I posted previously before about my two dynamic buffers not being dynamically updating the constant shader. The tessellation buffer isn't working because I have to manually update the tessellation ...
1
vote
3answers
428 views

Bouncing ball isssue

I am currently working on the 2D Bouncing ball physics that bounces the ball up and down. The physics behaviour works fine but at the end the velocity keep +3 then 0 non-stop even the ball has stopped ...
2
votes
1answer
318 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 ...
0
votes
3answers
454 views

Loaded Images are upside down

I'm using SharpDX Toolkit and load a png file with SharpDX.Toolkit.Graphics.Texture.Load(GraphicsDevice, Stream) If I apply the texture to another texture it's drawn upside down. The texture is: and ...
1
vote
3answers
549 views

Error on running exe, build using SharpDX

I have developed a windows application to read gamepad using SharpDx (XInput) and C# (VS 2008). The application is running smoothly in my development environment. But when i move to some other machine ...
0
votes
1answer
116 views

Determining desktop bounds by D3D9 adapter

I've got a Direct3D 9 application which normally runs full-screen. The user is able to select a display adapter to determine which screen it is shown on. I also offer a Windowed mode which launches ...
3
votes
1answer
4k views

Teamviewer doesn't show my game screen

I've been building a 3D engine from scratch using C# and I've tried to show the result to a friend of mine using Teamviewer. When my demo game starts he doesn't see it. He can only see the last active ...
1
vote
1answer
4k views

Can I use DirectX with C#?

I thought that if you wanted to make games using DirectX, you had to know C++. But I recently found out that that is not actually true. It looks like some parts of Direct3D can be used from C#. This ...
0
votes
2answers
1k views

how to detect same keyboard key press only once

I am designing a keyboard class that can detect the keyboard key press only one time but I still cannot figure out the way to do it. My goal is just check and perform the action only once when the ...
2
votes
3answers
704 views

Is it possible to use DirectX in pure C program?

I want to try something simple with Direct Sound. Just want to know if it's possible. Or maybe I need some other API?
0
votes
1answer
95 views

Just 2 images on a window loaded using DirectX10…But how?

I am a beginner to DX and I have tried looking everywhere for something very similar to this concept but can't find anything. I just want two rectangles on a window. Rectangle 1 : on some x,y with ...
3
votes
1answer
394 views

Finding Pixels within UV Coordinates

I am building lightmaps for 3D models. My lightmap algorithm needs to determine which pixels( lumels ) within the lightmap texture fall within the boundary of a mesh face( triangle )...this process ...
2
votes
1answer
144 views

Development with multiple libraries

I'm almost fresh to the game development and I have one question about libraries. If I choose one library, such as SFML, to develop the menu of my game, is it possible to merge with, for example, ...
3
votes
3answers
798 views

How to check if user has integrated graphics card?

I'm almost done with my Direct3D game. When user starts game first time it will adjust settings (and maximum settings) based on DirectX feature level starting from 9_1 up to 11_1. I have different ...
1
vote
1answer
77 views

How can I fix this transparency problem when my data is viewed from a certain angle?

using Microsoft.DirectX.Direct3D; using Microsoft.DirectX; I render a 3D data by setting device.RenderState.AlphaBlendEnable = true Now my top view looks like below, the outer surface layer ...
1
vote
1answer
320 views

Color grading, shaders and 3d textures

I'm trying to implement color correction with the 3d lookup table. The lookup table is actually just a 2d texture 256x16 and consists of 16 squares which one is 16x16. When it comes to rendering, I ...
1
vote
0answers
41 views

Align Object With Triangle

I currently am trying to figure out how rotate an object so it's aligned with a triangle along the Z Axis. I have the world matrix of the object and a triangle, which has it's 3 points and the normal. ...
5
votes
1answer
613 views

What does HLSL's tex2D return at (0,0)?

I'm trying to understand the mapping of texels to pixels, especially in the context of pixel shaders. I already found out the following: When I define a standard quad with vertices at integer ...
2
votes
1answer
806 views

The View-Matrix and Alternative Calculations

I'm working on a radiosity processor in DirectX 9. The process requires that the camera be placed at the center of a mesh face and a 'screenshot' be taken facing 5 different ...
1
vote
0answers
187 views

Connecting smoothly N textures on terrain

I started to create my own terrain in a quite common way, just like this: http://www.rastertek.com/tertut18.html . It is infinite and automatically generated (by using coherent noise). The areas are ...
12
votes
1answer
345 views

Accounting for waves when doing planar reflections

I've been studying Nvidia's examples from the SDK, in particular the Island11 project and I've found something curious about a piece of HLSL code which corrects the reflections up and down depending ...
0
votes
1answer
211 views

An API independent way of managing video memory?

I'm developing a game. The game architecture is very modular. I have a "Graphics Engine", which uses either a Direct3D or OpenGL renderer. However the user does not have access to the renderers ...
3
votes
2answers
82 views

Local shape color blending

I am trying to implement this in Unity 4 Pro. But I am stuck in the blending part. I don't understand how you could blend multiples textures/colors using multiples volumes on an object. How could you ...
4
votes
2answers
296 views

Open World Object Management

I'm currently creating a system that essentially creates a world at run-time based on a seed I choose. In this system, I made it so that there are certain "chunks" that divide up different sections of ...
3
votes
1answer
628 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 ...
1
vote
1answer
374 views

How do I copy the depth buffer to CPU memory in Direct3D 9?

I have code in OpenGL that uses glReadPixels to copy the depth buffer to a CPU memory buffer: glReadPixels(0, 0, w, h, GL_DEPTH_COMPONENT, GL_FLOAT, dbuf); How do I achieve the same in Direct3D? I ...
3
votes
1answer
259 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 ...
5
votes
4answers
913 views

Face-Click Detection ( like in Minecraft )

I am working on a box-based game engine like minecraft and I was wondering how to detect the "clicked face" when placing blocks. I have created this engine in C++ ( DirectX / D3D ), C# ( XNA ) and ...
0
votes
3answers
877 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 ...
0
votes
2answers
579 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 ...
2
votes
1answer
451 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 ...
0
votes
1answer
704 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 ...
3
votes
1answer
335 views

Gamepad thumbsticks active range

for my current project I use gamepad. I was successfull in hooking it up in C# through SlimDX. Everything works fine, only problem is that thumbsticks don't fully use the active range. If I move ...
1
vote
2answers
288 views

How can I use D3DXLoadMeshFromX with Direct3D 11?

I'm trying to write some class for loading meshes from X files. But I can't use the function D3DXLoadMeshFromX because its third parameter is LPDirect3DDevice9. In my D3D initialization code I ...
1
vote
1answer
189 views

Whats the point of this LPDIRECT3DDEVICE9 reference?

I'm going through the DirectX 9 MSDN documentation Which lead me to something rather peculiar, do you need a class reference in DirectX 9? Can someone tell me what the point of the class ...
0
votes
1answer
64 views

DirectX D3DXVec3Normalize unresolved external symbol

I have simple DirectX project: #include <d3dx10.h> #include <d3dx10math.h> #pragma comment(lib, "d3d10.lib") #pragma comment(lib, "d3dx10.lib") int main() { D3DXVECTOR3 u(1.0f, ...
2
votes
1answer
384 views

Do I need to update my DirectX SDK in order to fix a crash with D3D10_CREATE_DEVICE_DEBUG?

I am currently using the DirectX June 2010 SDK. Everything was working fine with my installation until recently. Unfortunately I'm not sure what changed or when, but now when I create a device with ...
2
votes
3answers
220 views

Is creating vertex/index buffer optimized this way?

I have some vertices in an array from which I create a vertex buffer. Let's say I have vertices: v1, v2, v3, v4 I use indices: 0, 1, 2, 3 Is there any performance impact if I change the indices ...
2
votes
0answers
216 views

Chunk Texture3D GPU generated vertices

I read GPU Gems 3 from NVidia about procedural terrain. It's quite interesting but not applicable for me because I only read the online version without the shipped DVD so I'm not able to download the ...
-1
votes
1answer
1k views

Is SDL a game engine? [closed]

I would like to ask if SDL is considered a game engine, or just a library like Open and Direct3D?
1
vote
0answers
80 views

Directx Texturing problem [closed]

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 ...
1
vote
2answers
850 views

how to set image resource path for D3DXCreateTextureFromFileEx method?

I try to merge all the image resources to a folder called resource. So, set image path as "resource/" but my directX framework only works if I compile at VS 2010. If I run from the debug folder it ...