A proprietary shading language developed by Microsoft for use with the Microsoft Direct3D API.

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2answers
208 views

The saturate function is not working in my pixel shader

I wrote a pixel shader for my game and when I tried to compile it an error occurred: ID3DXEffectCompiler::CompileEffect: There was an error compiling expression When I removed all the saturate ...
3
votes
1answer
534 views

Constant Buffer size mismatch on PS, fine on VS and GS

I have the following C/C++ struct: struct ShadowMapCB { Math::Matrix4 cropMatrix[4]; Math::Matrix4 textureMatrix[4]; float splitPlane[4]; }; and my HLSL constant buffer: ...
3
votes
1answer
280 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 ...
0
votes
2answers
293 views

How to implement input-texture limited alphablending of 2 textures with HLSL?

I try to implement a HLSL shader the does the normal Alphablend with premultiplied colors (just as XNA4 does) but depending on some existing colors. One can think of adding a glow to a 2D terrain ...
5
votes
1answer
479 views

HLSL Circle all white

I have been trying to get my shader code (HLSL) to draw a simple circle but after a day and a half I am getting nowhere. It seems people are using the x^2 + y^2 = r^2 and remap texcoords but I only ...
1
vote
1answer
215 views

Blur offset artifacts

I have simple blur shader which I calculate offsets in: Piece of vertex shader: output.texCoord1 = input.tex + float2( texelSize * -4.0f, 0.0f ); output.texCoord12 = input.tex + float2( texelSize * ...
0
votes
1answer
280 views

XNA 3D custom shader/effect gives shakey rendering in the distance

I am rendering a simple flat plane + texture to use as the floor for a game. I'm rendering it using a custom effect I've written. The problem I have is that the ground in the distance gets a bit ...
0
votes
2answers
294 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 ...
2
votes
1answer
275 views

Direct3D shader compilation fails with constant buffers

I've been particularly annoyed by a 'bug' for a couple days involving D3DCompile and vertex shaders with constant buffers. I'm assuming the bug is my fault (missing flag or small nuance of the poorly ...
1
vote
2answers
141 views

In the Direct3D 9 Effect API, how do you find the texture variable linked to a sampler?

In Direct3D 9 effect files you can write a sampler state that specifies a texture variable to use, like Texture2D g_texSkyDome; SamplerState g_samplerSkyDome { Texture = <g_texSkyDome>; ...
0
votes
2answers
925 views

HLSL shader optimization [closed]

The following HLSL shader (without preprocessing) results in 65 arithmetic operations (see below). Can the same effect achieved with <=64 operations? // Center of "light" float x; float y; // ...
2
votes
1answer
181 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 ...
1
vote
2answers
227 views

Diffuse light direction

I'm learning a tutorial from Rastertek about diffuse light with DX 11, here's the shader code: float4 LightPixelShader(PixelInputType input) : SV_TARGET { float4 textureColor; float3 ...
1
vote
1answer
281 views

MultiTexturing by neighbouring points textures

Visual example: I've been trying to understand multitexturing for a while now, I've created a terrain generator but have no need for height just yet and I still want one texture to blend over to ...
3
votes
1answer
192 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 ...
6
votes
1answer
155 views

XNA Deferred + Forward, Depth Problem?

Im working with my deferred engine in XNA 4.0 and Im combining it with a forwardpipeline to support semi-transparency and other "forward only" effects. Let me describe what I do: Render GBuffer ...
6
votes
1answer
449 views

Changing water color based on depth

I'm looking to make a water shader that colors the water based on its depth. Up until now my water shader that I've used has basically been extremely reflective and only looked somewhat blue because ...
2
votes
1answer
487 views

How can I simulate objects floating on water without a physics engine?

In my game the water movement is done in a shader using Gerstner equations. The water movement looks realistic enough for a school project but I encounter serious problem when I wanted to do sailing ...
3
votes
2answers
281 views

Which will be faster? Switching shaders or ignore that some cases don't need full code?

I have two types of 2d objects: In first case (for about 70% of objects), I need that code in the shader: float2 texCoord = input.TexCoord + textureCoord.xy But in the second case I have to use: ...
1
vote
1answer
134 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 ...
9
votes
4answers
1k views

Avoid if statements in DirectX 10 shaders?

I have heard that if statements should be avoid in shaders, because both parts of the statements will be execute, and than the wrong will be dropped (which harms the performance). It's still a ...
2
votes
1answer
771 views

Low-level GPU code and Shader Compilation

Bear with me, because I will raise several questions at once. I still feel, though, that overall this can be treated as one question that may be answered succinctly. I recently dove into solidifying ...
4
votes
1answer
2k 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 ...
1
vote
1answer
226 views

Confusion on HLSL Samplers. Can I Set Samplers Inside Functions?

I'm trying to create a system where I can instance a quad to the screen, however I've run into a problem. Like I said, I'm trying to instance the quad, so I'm trying to use the same geometry several ...
1
vote
2answers
560 views

HLSL Pixel Shader that does palette swap

I have implemented a simple pixel shader which can replace a particular colour in a sprite with another colour. It looks something like this: sampler input : register(s0); float4 ...
1
vote
2answers
275 views

Doubling the DPI with a shader?

I'm developing a game where the map is generated with Perlin Noise, but on the CPU. I am generating some perlin noise onto a texture with a small size, and then I stretch it out to the whole screen to ...
5
votes
2answers
823 views

Rain drops on screen

I am trying to make simple rain drop effect on screen.Something like this http://fc00.deviantart.net/fs20/f/2007/302/5/6/Rain_drops_by_rockraikar.png My idea is to: Create small drop shaped normal ...
1
vote
0answers
583 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 ...
1
vote
1answer
232 views

XNA Shader Texture Memory

I was wondering about texture optimization in XNA 4.0. Will the the contentmanager send the texturedata to the GPU directly when the texture gets loaded or do I send the texture data to the GPU when ...
6
votes
1answer
686 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 ...
16
votes
2answers
4k views

Best way to mask 2D sprites in XNA?

I currently am trying to mask some sprites. Rather than explaining it in words, I've made up some example pictures: The area to mask (in white) Now, the red sprite that needs to be cropped. The ...
2
votes
1answer
187 views

Why is my shadowmap all white?

I was trying out a shadowmap. But all my shadow is white. I think there is some problem with my homogeneous component. Can anybody help me? The rest of my code is written in xna Here is the hlsl code ...
1
vote
0answers
238 views

Outline Shader Effect for Orthogonal Geometry in XNA

I just recently started learning the art of shading, but I can't give an outline width to 2D, concave geometry when restrained to a single vertex/pixel shader technique (thanks to XNA). the shape I ...
0
votes
1answer
144 views

HLSL problem with divide by homogeneous component

When I try to divide my position.z by my position.w in HLSL I get as result always 1.0f or higher. Is this a common problem for some reason? When I divide my position.x or y by the w this works fine. ...
4
votes
1answer
725 views

Pass large array to pixel shader

I am trying to write a Pixelshader for a curve effect in Direct2d. A curve effect maps each color channel value to a different value by using a look up table. For this effect I would need to pass 3 ...
4
votes
1answer
315 views

A Quick HLSL Question (How to modify some HLSL code)

Thanks for wanting to help! I'm trying to create a circular, repeating ring (that moves outward) on a texture. I've achieved this, to a degree, with the following code: float distance = ...
0
votes
1answer
120 views

how to create texture for modelmesh?

Is there a possibiltiy to create a texture from a meshpart in xna. By getting a flat version of the mesh. So I can create a texture for it and edit that texture(via rendertarget)? I need to get the ...
1
vote
1answer
341 views

Heightmap in Shader not working

I'm trying to implement GPU-based geometry clipmapping and have problems to apply a simple heightmap to my terrain. For the heightmap I use a simple texture with the surface format "single". I've ...
0
votes
1answer
611 views

Shadows shimmer when camera moves

I've implemented shadow maps in my simple block engine as an exercise. I'm using one directional light and using the view volume to create the shadow matrices. I'm experiencing some problems with the ...
5
votes
1answer
478 views

Dealing with alpha for 2D per pixel lighting

Right now I've got a simple light shader. Every bitmap I draw goes through it to make up the scene. I only draw quads. texture tex; sampler2D s = sampler_state { texture = <tex>; ...
5
votes
3answers
691 views

Finding out what pixel on the screen the fragment falls on

In my 2D game, I render tiles. I want to do lighting without needing an extra buffer the size of the screen. Either in glsl or hlsl, what could I feed to the shader each time I render a bitmap so ...
5
votes
1answer
2k views

How do I use screen-space derivatives to antialias a parametric shape in a pixel shader?

In Valve's Alpha Tested Magnification paper, it mentions using "per-pixel screen-space derivatives" for doing anti-aliasing. My understanding is that this is the ddx and ddy intrinsic functions in ...
1
vote
0answers
263 views

Full screen shader causes performance hit

I basically want to have a shader run that can do something like toon shading, or grayscale the whole screen, or radial lighting. To do this, I create a new bitmap each time the display resizes that ...
0
votes
1answer
148 views

How would I write a shader that supports 2 different texture coordinates?

Hi I am not very good with writing shaders. How would I make a shader that simply supports 2 texture coordinates so I can load up 2 different textures to be used at the same time but on different ...
0
votes
1answer
153 views

My blur gets ugly when radius too high

I have the following h and v blur: Horz texture tex; sampler2D s = sampler_state { texture = <tex>; }; int tWidth; int tHeight; float blurSize = 9.0; float4 ...
2
votes
2answers
1k views

My hlsl shader cannot unroll a loop?

I have this shader: texture tex; sampler2D s = sampler_state { texture = <tex>; }; int tWidth = 1; int tHeight = 1; int blurLength = 3; float4 ps_main(VS_OUTPUT ...
1
vote
1answer
673 views

how to modify shadow mapping in “3D Graphics with XNA Game Studio 4.0”? [closed]

So I've been following the tutorials from the book Sean James's "3D Graphics with XNA Game Studio 4.0", and have been doing fine until i reached the shadow mapping part. in this book it creates point ...
1
vote
1answer
1k views

Pixel Shader, YUV-RGB Conversion failing

I am tasked with playing back a video hthat comes in in a YUV format as an overlay in a larger game. I am not a specialist in Direct3d, so I am struggling. I managed to get a shader working and am ...
0
votes
2answers
712 views

How to make HLSL effect just for lighting without texture mapping?

I created an effect and just want to use lightning but in default effect that XNA create we should do texture mapping or the model appears 'RED', because of this lines of code in the effect file: ...
1
vote
3answers
613 views

Writing a shader once without using CG?

Is there a tool that can convert a fragment shader from hlsl to glsl or glsl to hlsl? I do not want to use cg since it is not able to work on mobile platforms. Is there a tool that can make it so I ...