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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How can I programatically determine if I can create a hardware D3D device?

I have a D3D 11 application to which I would like to add support for software rendering. This is because in some circumstances it will be run on over remote desktop or on machines without GPUs. From ...
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174 views

moving first person camera with the mouse on right click

I am new to game development and I am trying to get the game input working. I have successfully got all the movement keys for walking/running/looking around working; however, I am having a terrible ...
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166 views

Rendertarget and alphablending problem (Offscreen particle rendering)

Today, I have implemented soft particles by rendering them to a separate render target and blending that with the scene, which worked as expected with additive blended particles. In that case I render ...
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2answers
297 views

Is Batching Geometry Every Frame Always Slower Than Individual Draw Calls

I'm currently have an application that has ~10k draw calls. I implemented a batching scheme where I group all objects that share material, vertex format, etc and pre-transform them by their world ...
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70 views

Skinning mesh with Hermite Interpolation

I'm trying to implement an skinning mesh and I use Hermite Interpolation for evaulating frame's position. When I use the normal interpolation t*p1 + (1-t)*p2, it run well, but when I change to ...
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67 views

Triangular grid and rendering to a texture (Direct3D 11)

Is it possible to render vertex data from a triangular grid into a texture with a same size (i.e. 3x3 vertices to 3x3 pixels - each pixel is representing one vertex)? Consider following situation. I ...
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2answers
182 views

How to mix pixel colors in Shader?

I have a pixel that have a colour RGB. This color is calculated by the shader and can be anything. How can I override this color by a colour I choose. If my pixel is white it's simple, I can do this: ...
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149 views

When should rendering be performed during a frame?

When working with OpenGL or DirectX, should draw calls be done all at once, at the end of the update loop, or is it better to have draw calls occur during the update loop rather than just at the end?
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112 views

How to share matrix in HLSL?

I am trying to share this across multiple effect files: matrix worldMatrix : register(vs_4_0, b0); If I set this from one effect file, will it effect every effect file which has the same type of ...
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1answer
106 views

Reuse VertexBuffer or new VertexBuffer object?

I'm trying to render bitmap fonts in directX10 at the moment, and I want to do this as efficiently as possible. I'm having a hard time getting a start on my design because of this question though. So ...
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3answers
739 views

How can I create a glitter effect?

I am trying to create a glittering effect for my realtime shader but I don't know how. Here is one example, and another example. What technique can I use to implement this?
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180 views

Rendering Textured Terrain With SharpDX Toolkit [closed]

So i recently moved from XNA to SharpDX Toolkit and started with some basics. The 2d part was easy since nearly nothing has changed but im really struggeling with the 3d part. For example i wanted to ...
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40 views

IndexedInstanced logic

I'm using SharpDX.Toolkit with three buffers: two vertex and one index buffer. The first vertex buffer is bound to slot 0 for per-vertex data with following data: static VertexPosition[] vertexData = ...
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1answer
56 views

DXUT getters are always null using DLL

I'm struggling with a problem for a while and I hope some of you can help me out. The title for this question is vague, so I will try to explain my problem as best as I can! I'm am creating a project ...
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1answer
80 views

Changing the maxDepth of viewport

Whenever I change the maxDepth of the viewport from 1.0 to say 300.0f (just for kicks), everything on my screen disappears. Why is that? Is there anywhere else I have to account for this change in ...
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1answer
59 views

Does `SetResourceArray` copy the data into the GPU?

I am trying to create multiple textures, and only several of them change every few frames. I don't want to have to copy in the whole array via SetResourceArray for just a few textures that change, ...
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1answer
132 views

How do we apply different textures to different faces generated via geometry shader?

I am trying to render a cube by starting of with one vertex into the shader, then geometry shader to expand into a cube, and then apply a different texture to each side. The part I am facing the issue ...
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2answers
336 views

Implementing Geometry Instancing in DirectX

I have a project that I'm doing in Managed DirectX (DX9) where I want to render lots of grass. My current method (many draw calls) is slow, but I've heard Geometry Instancing can fix that. I know ...
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2answers
256 views

Anti-aliasing a sphere

I render everything in my game in 2D with SpriteBatch with the exception of a spherical entity (orb) that I render as a spinning and dynamically lit (custom effect) sphere in 3D. I capture the sphere ...
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2answers
159 views

Is there a way to optimize this 2D lighting effect shader? [duplicate]

I'm doing a little 2D game in C++ with Direct3D 11. In the game I want to render a sort of shadow that covers part of the screen: To do this I am using this pixel shader: float4 PS_Main( PS_Input ...
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2answers
168 views

How can I render 3D dots at object vertex positions?

What is the best way to put a dot on a vertex? I have a model (a plane for example) consisting of a few thousand vertices. I want to draw a red dot at every vertex's 3D position, just like 3ds Max's ...
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1answer
447 views

How to get pixel coordinates between 0,1 from SV_POSITION [duplicate]

I am new to HLSL and Directx. I was trying to write a simple gradient Shader by modifying one of Microsoft samples. 1.I can not understand why SV_POSITION is float4? If it is pixel coordinates ...
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1answer
101 views

How do I determine color resolution of an output in DXGI/D3D?

i'm was revising some code i wrote some time ago when working on the window wrapper for my rendering framework. The framework is based off DirectX, but it wasn't really using any D3D-related facility. ...
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1answer
303 views

How can I draw a perspective-correct quad?

I'm trying to draw a quad in 2D (in SharpDX, but that is basically XNA). But texture correction is not working, and I'm getting only an affine textured quad. I'm using BasicEffect to render it. ...
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2answers
194 views

How to fill/initialize D3D11_SAMPLER_DESC properly?

If I want to set explicitly every parameter of the structure I just do so and that's it. But what if I want to set only some of them and leave the rest with default values? I've seen in some tutorial ...
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1answer
281 views

DirectX error with older XP systems

I am a blind programmer, working on an audio game for the blind. I am using SlimDX, and it has been tested on dozens of systems from XP to Win 8.1. My code works on most systems just fine, but I ...
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2answers
523 views

Fixed Function vs Programmable Pipeline performance with many batches

In OpenGL 2.0 I can easily make 10,000 draw calls per frame (with state changes in between each call). However, if i try to do this in either OpenGL ES 2.0 or DirectX9 with shaders, my peformance is ...
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1answer
369 views

How to create texture using raw RGBA texture data without having to use LockRect

I was previously uploading textures to DirectX by creating texture in D3DPOOL_MANAGED and then calling LockRect to upload the texture data to DirectX. However, I have switched to using DirectX9 Ex, ...
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1answer
85 views

Multiplying matrices in HLSL

I have code that calculates a position like this in HLSL: output.ShadowPos = input.VertexPos; output.ShadowPos = mul(output.ShadowPos, gWorld); output.ShadowPos = mul(output.ShadowPos, ...
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29 views

Blendshapes workflow in mudbox

I am new to mudbox. I want to create a face with blendshapes. Currently my face has 24576 polygons on level 3. I would like to go to level 2 or level 1, ie lower than 6000, but there, detail suffers. ...
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3answers
125 views

Applying scale to objects appears to have little effect when close up.

I just started out with D3D 11. My goal is to write a cube voxel engine (Minecraft style). Actually it's working pretty solid already, but when I finally tried to change the size of my cubes, I ran ...
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198 views

Dynamically updating a shader resource view which was loaded from D3DX11CreateShaderResourceViewFromMemory?

I've loaded up multiple images from my custom video format into a vector after using D3DX11CreateShaderResourceFromMemory. Inside the rendering loop it's not updating the shader resource view like I ...
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148 views

Why am I getting rendered rectangles that are off relative to their bounding rectangles in this code?

I am rendering different rectangles with the help of the DirectXTK (PrimitiveBatch) and surrounding them with a BoundingOrientedBox (DirectXCollision.h). For visualization I draw the corners of the ...
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3answers
154 views

Can I store D3D9 textures so that they don't consume process memory and also don't require “lost device” handling?

I have an OpenGL application that uses a lot of texture memory. While the texture is stored in the system memory, that texture memory is not part of my application process memory. When this ...
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1answer
161 views

Center directional light shadow to the cameras eye

I'm currently drawing my directional light shadow using this view and projection: XMFLOAT3 dir((float)pitch, (float)yaw, (float)roll); XMFLOAT3 center(0.0f, 0.0f, 0.0f); XMVECTOR lightDir = ...
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1answer
516 views

Anyone know the frames per second that IOS apps run?

Anyone know the frame rate that iphones, ipads, and even android mobiles run?
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121 views

Where does XNA 4.0 takes memory from to perform operations?

I found this question which talks around the question I'm interested in. In particular I focused on the line where the guys says that GraphicsDevice object is literally a representation of the ...
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2answers
161 views

How can I repeat a portion of a texture on a quad?

I want to repeat a selected part of the texture into a quad. I was looking at this thread, however the solution involved changing my HLSL. Is there any way to do it without changing my shader ...
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1answer
106 views

When creating the horizontal blur, how is the vertex shader being called for each pixel?

I am following this tutorial. I am confused as to why the VertexShader is being called each time for the PixelShader. I was under the assumption the VertexShader is called only 6 times during the ...
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1answer
202 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
303 views

Set Sampler states: Linear, Bilinear, Trilinear Filtering/Interpolation

How do you set each of these sampler states in the hlsl Linear filtering Bilinear filtering Trilinear filtering
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1answer
367 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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3answers
194 views

Is it possible to gain performance by omitting vertex normals in the GPU pipe?

I am working on a rendering problem where I want to render as many raw triangles to the screen as I can with either OpenGL or DirectX with the absolute fastest performance possible. I wondered about ...
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1answer
233 views

How does HLSL handle clip(vector)?

My goal is to convert clip() to GLSL, version 1.5. I'm currently doing a basic: if (x < 0) discard; But if x is not a scalar, obviously I can't use the "<" operator. So I'm wanting to ...
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2answers
372 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
227 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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1answer
97 views

Basic DirectX app creates whistle noise

I'm in the process of learning DirectX and in the book examples they have a very basic application which sets up DirectX and displays a blank screen. When I run this app however my computer starts ...
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1answer
153 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 ...
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2answers
190 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 ...
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287 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 ...