a computer program that runs on graphics hardware and provides a high degree of control over how scenes are rendered
1
vote
2answers
657 views
How to achieve this particular screen filter with GLSL?
I know this may be a "short" question, but still here it goes.
I would like to know how to achieve a post rendering effect, that looks like the following image from walking dead series:
I will ...
1
vote
2answers
155 views
Why is antialiasing dependent on sampling?
I am thinking about the best ways to render two dimensional objects in the highest detail possible using modern graphics technology and it occurred to me that when I simplify a situation enough, I ...
1
vote
1answer
640 views
How to make a custom semantics HLSL shader for the pixel shader
I'm pretty sure it's possible but i have no idea how.
Could anyone tell me how to make a custom semantic for a pixel shader.
Thanks
1
vote
1answer
235 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 ...
1
vote
2answers
202 views
Deferred rendering order?
There are some effects for which I must do multi-pass rendering. I've got the basics set up (FBO rendering etc.), but I'm trying to get my head around the most suitable setup. Here's what I'm ...
1
vote
1answer
472 views
What kind of shader is this?
Cube World uses a pretty good looking shader, I especially like the shading of the characters:
Is this soft shading? I'd like to achieve this effect in Unity 3D Free, but since the free version ...
1
vote
1answer
135 views
Can I limit the number of shader units used by my video card?
Can I limit the number of shader units used by my video card? (A shader unit is the part of the hardware which can execute a shader program, where each unit runs in parallel).
I'm interested in this ...
1
vote
2answers
632 views
OpenGL ES high-quality 2D scaling
Let's say I'm making a 2D game and I want to implement a zoom in/out feature. Normally this is as simple as modifying the projection matrix to get more or less of the world to show. However, this ...
1
vote
1answer
124 views
How to mix effects together?
Lets say I have got terrain effect, contains multitexturing, light. Now water effect. It must be different, but must be also affected by light. Other one, player effect, must also be affected by ...
1
vote
1answer
2k views
Simple GLSL example to render a 2d textured quad?
I would really love to add shader support in my game , although i can't seem to find a SIMPLE example on how to setup opengl for using shaders.
So i would like to ask : Does anyone knows if there are ...
1
vote
1answer
449 views
Porting an HLSL 3.0 shader to 2.0?
I have a couple of .fx files from a Shader-Based 2D Shadows example. I want to utilize the same kind of technique with XNA 4.0's Reach profile, which if I understand correctly needs to have HLSL 2.0 ...
1
vote
1answer
80 views
Texture Shaders vs. Pixel/Fragment Shaders?
My question is a simple one.
Functionally, practically, and performance-wise, what are the differences between using a D3DX Texture Shader, and using a Pixel/Fragment Shader rendered with a full ...
1
vote
3answers
533 views
Methods of procedural terrain generation that can work using DirectX 9 (SM2.0)?
I'm working on a simple game / fun project that I want to be largely procedurally generated. At first I started by using boxels (Similar to Minecraft, but not textured) for the terrain and it came out ...
1
vote
1answer
245 views
Why can't my .exe find my .fx file?
I'm having a problem with my .fx file in my D3D 11 application.
I can run the application just fine from Visual Studio, but when I run the .exe it fails when trying to load the .fx file.
I've ...
1
vote
2answers
159 views
How to shade a texture two different colors?
To give an example of what I'm asking about, I'll use Saints Row 3 since I've been playing that lately. In that game you can customize your looks and your car's appearance a lot. Your coat can have ...
1
vote
1answer
186 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 ...
1
vote
3answers
278 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 ...
1
vote
1answer
195 views
Intercepting DirectX calls and optimizing the overal performance of games
I would like to use a DirectX proxy dll to intercept (and possibly optimize) the graphics calls being made by normal PC games. I am going to "screen cast" a game with ffmpeg or something similar and ...
1
vote
1answer
527 views
How to draw reflection of shaded objects in OpenGL?
I am trying to draw a scene with objects floating around and a mirror among them to reflect the objects in front of it.
I managed to draw the reflection properly when the floating objects aren't ...
1
vote
1answer
154 views
Blur gets displaced compared to original image
I have implemented a SSAO and I'm using a blur step to smooth it out. The problem is that the blurred texture is slightly displaced compared to the original. I'm blurring using a 4x4 kernel since that ...
1
vote
2answers
185 views
What could cause a pixel shader to paint outside the lines of the vertex shader output?
From what I understand, the pixels that a pixel shader operates on are specified implicitly by the SV_POSITION output (in DirectX) of the vertex shader. What then could cause a pixel shader to render ...
1
vote
1answer
101 views
How does one multiply by a constant in a VS1.1 assembly vertex shader?
I'd like to multiply a vector by -1
e.g.
mul r0, r0, -1
When I try this, I get this error message:
SimpleShaderA.vsh(20,17): error X2000: syntax error : unexpected integer '1l'
How can ...
1
vote
2answers
810 views
Using a shader messes up my alpha in XNA
I'm making a 2D game that ends up being too dark on some laptops, so I figured I'd use a shader so people could brighten it up if need be. Unfortunately, once I got it in there nothing would fade in ...
1
vote
1answer
282 views
Output from vertex shader in D3D9
I've been looking at creating some 2D rendering systems in D3D9, basically because I don't like ID3DXSprite. For the output of the vertex shader, what co-ordinate system does the run-time expect ...
1
vote
1answer
1k views
OpenGL ES Shader help (Blending)
Earlier I required assistance getting to grips with how to retain the alpha channel of a transparent texture in my colourised texture shader program.
Whilst playing with that first version of my ...
1
vote
1answer
84 views
“lerp” returning value (Shader)?
I don't understand the lerp example in this code :
if(dot(WorldNormalVector(IN, o.Normal), _SnowDirection.xyz)>=lerp(1,-1,_Snow))
o.Albedo = _SnowColor.rgb;
else
...
1
vote
2answers
138 views
HLSL Multitexturing with more than 4 textures
I've come up with an idea that should work in multitexturing a terrain with more than 4 textures, up to a 64 if a supported ShaderModel is used.
I'm trying to use the RGBA color values as both values ...
1
vote
1answer
101 views
OpenGL VBO Additional Attributes
If I have a buffer with my vertices, normals and texture coordinates, and I use glDrawArrays to draw the VBO to the screen, how can I send attributes per vertex that I placed in an array to the shader ...
1
vote
1answer
49 views
How can I get a pointer to ID3DX11EffectShaderVariable from ID3DX11Effect
I'm using the DirectX Effects framework and I want to create an input layout automatically when compiling an effect. I've tried to call ID3DX11Effect->GetVariableByName() with the shader's name, to ...
1
vote
1answer
61 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>;
...
1
vote
1answer
233 views
Apply portion of texture atlas
I'm trying to write a shader that only maps a portion of a large texture to my sprite and I'm getting a strange behaviour with my current code.
This is what I have right now:
Texture atlas ...
1
vote
1answer
216 views
Light following me around the room. Something is wrong with my shader!
I'm trying to do a spot (Blinn) light, with falloff and attenuation. It seems to be working OK except I have a bit of a space problem. That is, whenever I move the camera the light moves to maintain ...
1
vote
2answers
303 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
1answer
910 views
How to make 2D water like in this video?
I wanna make water and waves for my little 2D PC game like in this video:
http://www.youtube.com/watch?v=ooU6cTeirlQ
I don't know how to write a similar shader. Does anybody know how to write a ...
1
vote
1answer
628 views
Shader authoring/editing tools for GLSL ES
Since Render Monkey has been discontinued (perhaps due to the complexity of today's shading languages), there are few successors that can match its functionality. Is there any useful tool for material ...
1
vote
1answer
111 views
How do I read the an environment map CPU side? (Similar to texCube function on GPU)
I need to extract the one pixel from a environment mapping (I already have the 6 textures) using the normal vector. How can I achieve this ?
I want something very similar to what texCUBE(link) does ...
1
vote
1answer
413 views
Problem when animating MD5 model (GPU Skinning)
I'm trying to implement a GPU skinning version of the md5mesh.js by @tojiro (demo with CPU skinning) in WebGL (live demo of the project here, use WASD to move the camera around).
The main concept is ...
1
vote
1answer
250 views
Setting the values of a struct array from JS to GLSL
I've been trying to make a structure that will contain all the lights of my WebGL app, and I'm having troubles setting up it's values from JS. The structure is as follows:
struct Light {
vec4 ...
1
vote
1answer
143 views
How do I draw a multi-object mesh at once?
This is a very elementary question. At the moment I am drawing lots of faces separately by setting a location uniform separately for each one of them. This is very slow. As I understand it, the ...
1
vote
1answer
704 views
How do you make a water shader?
I'm working on a minecraft-like world and recently saw this video with a water shader. I searched but couldn't find any good info on how to do something similar. Maybe I'm just googling the wrong ...
1
vote
1answer
531 views
XNA - multiple VertexBuffers?
I'm trying to learn how to use VertexBuffers in XNA 4.0. I can render wireframe shapes and I can render textured shapes. However, I'm having some trouble rendering them both at once.
I'm ...
1
vote
1answer
607 views
Multiple Render Targets not saving data
I originally posted this question on stack overflow, but realised it might be better here. The original question can be found here
I'm using SlimDX, targeting DirectX 11 with shader model 4. I have a ...
1
vote
1answer
699 views
Calculating vertex normals on the GPU
I have some height-map sampled on a regular grid stored in an array. Now, I want to use the normals on the sampled vertices for some smoothing algorithm. The way I'm currently doing it is as follows:
...
1
vote
2answers
378 views
OpenGL ES multiple indices
I need suggestions for the best method of acheiving what I am trying to do:
-Using either OpenGL ES 1.x or 2.x
I need to pass a bunch of vertices to the GPU. Each one has 3 attributes: Position, ...
1
vote
1answer
419 views
OpenGL ES indices optimization
I am using OpenGL ES 1.x/2.x
I have 2 attributes to be passed to the GPU(one is colors, one is vertices, one color per vertex).
I use indices. Both attributes will use the same indices array
This ...
1
vote
1answer
330 views
Mandelbrot set not displaying properly
I am trying to render mandelbrot set using glsl. I'm not sure why its not rendering the correct shape. Does the mandelbrot calculation require values to be within a range for the (x,y) [ or (real, ...
1
vote
1answer
47 views
I have a frag shader, one with an empty s_lightMap, how and why is it effecting the output?
I have an image of concrete rocks of different shades of colors, and I'm applying this shader, but without referencing s_lightMap's uniform in my program:
precision mediump float; ...
1
vote
0answers
122 views
GL_EXT_shadow_samplers killing my shader
I have the following fragment shader for my scene
#extension GL_EXT_shadow_samplers : require
...
vec4 color = texture2D(uTextureUnit0, varTexCoord0);
if (colorTransformEnabled != 0) {
vec3 ...
1
vote
0answers
68 views
iPhone GLSL shader dynamic branching issue
I am trying to pass an array of vec3 as uniform and then iterate through them on each pixel. The size of array varies on situations so I can't make the loop with constant number of iterations. ...
1
vote
1answer
110 views
Driver error when using multiple shaders
I'm using 3 different shaders:
a tessellation shader to use the tessellation feature of DirectX11 :)
a regular shader to show how it would look without tessellation
and a text shader to display ...
