a computer program that runs on graphics hardware and provides a high degree of control over how scenes are rendered

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32 views

Strauss model : no specular component [duplicate]

I implemented the Strauss model with the metalness, transparency and smoothness parameters, taking the formulas from the book "Programming vertex geometry and pixel shaders", this is how I implemented ...
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0answers
372 views

How can I compute spotlight attenuation when I only have a spotlight cutoff angle?

I am trying to compute the spot light attenuation, though I don't have a spotCosCutoff (cosine of the spotlight cutoff angle) predefined variable in the shader so I have to compute it myself. This is ...
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0answers
365 views

Unity3D object fill shader

I've been researching this for a while, and had no luck yet. I figured I'd ask here to see if anyone had any good ideas. Essentially what I want is a shader that can make only part of an object ...
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0answers
2k views

How do I use UsePass in a shader in Unity when the pass does not have a name?

I'm trying to use passes from a given built-in shader in Unity. The docs say that the syntax is UsePass "Name". The problem is that built-in shaders don't have names on their passes. How could I do ...
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1answer
1k views

What's wrong with this Open GL ES 2.0. Shader?

I just can't understand this. The code works perfectly on the emulator(Which is supposed to give more problems than phones…), but when I try it on a LG-E610 it doesn't compile the vertex shader. This ...
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0answers
203 views

Radiosity using a hemisphere

I'm working on a radiosity processor. I'm projecting scene geometry onto a hemisphere at a high order of tessellation during a visibility pass onto a 1024x1024 render target. The problem is that the ...
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1answer
220 views

How to control in the vertex shader where pixel ends up in the renderTarget?

What if I have an arbitrary renderTarget, that is smaller than the screen (say it is 1x1 pixel) and I want to make sure in the VertexShaderFunction that all my pixels end up exactly in that 1 pixel ...
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1answer
653 views

DirectX 11, using Tessellation & Geometry shader in a single pass

Before all, sorry for my poor english ! With DirectX 11, i'm trying to create a random map full with GPU. Using Hull shader stage, I'm managing LOD with tessellation. Using Domain shader stage, I'm ...
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0answers
480 views

HLSL Triplanar texturing and multi texturing performance

I'm stuck for my terrain rendering shader code for DX9. I'm looking to implement triplanar texturing, a texture atlas, and blending between different textures. Right now it's working. The problem is ...
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1answer
359 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 ...
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votes
1answer
618 views

Does anybody know of any resources to achieve this particular “2.5D” isometric engine effect?

I understand this is a little vague, but I was hoping somebody might be able to describe a high-level workflow or link to a resource to be able to achieve a specific isometric "2.5D" tile engine ...
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1answer
135 views

How can I apply a shader to images in a map in XNA?

Basically, what I'm trying to do is apply a shader to my background image and only the background image. The problem is: the background is actually made up of tiles that are picked out of a list of ...
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1answer
31 views

OpenGL Mapped Memory Shader Source

Is there any way to get a pointer to a newly created shader object's source? I'd like to load a shader directly from file in to my shader object instead of loading to an intermediary variable and then ...
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1answer
320 views

Surface shader ignores lighting in vertexLit path

I want to use a surface shader in VertexLit(not Forward) rendering path. I caused a problem that the compiled shader completely ingnores lighting from the light sources on the scene. Here's the code: ...
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votes
1answer
1k views

Vertex shader are evil for performance?

I found that the vertex shaders are sometimes very useful, especially because they can generate geometries and extract and use a lot of informations from just 1 image. The problem is that my project ...
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votes
2answers
353 views

Could a large number, such as 255.000255 be converted to it's RGB channels in a Shader language?

If I had a Vertex Shader constant holding one float value, like: 255.000255 Where: The first 3 numbers are actually red (255), next three are green (000), then the last three are blue (255). ... ...
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votes
1answer
168 views

How To Buffer Many Vertex, Geometry, and Pixel Shaders

What is the best way to buffer Vertex Shaders, Pixel Shaders, etc into the Device/Device Context without having to reload them from the filesystem every time? ID3D11Device::CreateVertexShader ...
-1
votes
1answer
651 views

FXC: Error X3501: 'main': entrypoint not found

I am trying to compile a vertex shader using VS2013, but every time I try, FXC returns the following error: Error error X3501: 'main': entrypoint not found I've reduced the vertex shader to its ...
-1
votes
1answer
329 views

Unity's pack 4 floats

Linked to: GLSL pack floats into an RGBA texture I found EncodeFloatRGBA/DecodeFloatRGBA shader functions in Unity https://gist.github.com/hecomi/9580605 Now I try to figure out how they work. So I ...
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votes
1answer
37 views

GLSL shaders in a program

I obviously don't want the client to be able to view/modify my glsl code. Does this leave me with only one option, and that's to hardcode it in my cpp files? How do you deal with this issue?
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votes
1answer
340 views

UNITY3D - Orthographic Camera not render SHADER (2D GAME) [closed]

I have a problem with camera render, see the video please :) (note.: sorry for the music) http://youtu.be/BB8rXIzIWVU In Camera "Perspective", i can see the effect of shader: In Camera ...
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votes
1answer
156 views

Encoding Float to RG/RGBA and Blending

Encoding a float value inside a RG or RGBA texture is very interesting and useful but it is also become quite useless when you use blending as the result and the values might be altered because of ...
-1
votes
1answer
239 views

Combine Two Shader Program [closed]

For my android application, I want to apply brightness and contrast shader on same image. At present I am using gpuimage plugin. In that I found two separate program for brightness and contrast as ...
-1
votes
3answers
366 views

Directional light and matrix issues

I'm trying to implement basic directional lightning in OpenGL 3.3 by emulating the logic shown in this guide: http://www.arcsynthesis.org/gltut/Illumination/Tutorial%2009.html I do not understand ...
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votes
1answer
838 views

2d Pixel Shader literature, algorithms, etc. for Pixel Bender for flash

I am looking for some literature about pixel shaders algorithms or how would you call it. It's for 2d top down space shooter kind of game. I was thinking effects like halos, slow time, trails, fast ...
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votes
1answer
159 views

Create YUV texture for GL_TEXTURE_EXTERNAL_OES format

0 down vote favorite I need to create a yuv texture for GL_TEXTURE_EXTERNAL_OES format. source : ...
-1
votes
0answers
31 views

Create overlapping transparent images [duplicate]

I want to achieve this effect in the image. To make this I don't think a single pass to a stencil buffer would be enough because stencil buffers can't mask out the actual alpha inside of the ...
-1
votes
1answer
244 views

How to optimize my lighting shader?

I want to create a lighting effect on a gray-scaled world using cocos2d-x. What I've done is creating a layer which runs a shader program that receives light positions and radiuses as input and ...
-1
votes
1answer
86 views

Is lighting different from Immediate mode rendering to VBOs?

I recently got a textured cube to render as a VBO, and I've noticed some strange things as I have been trying to incorporate lighting. Firstly, there is no difference if I comment out any lines ...
-1
votes
1answer
180 views

Texture Stretching on VBO cube

I'm using JOGL and I'm trying to render a textured VBO cube with glDrawArrays. The cube renders, but the texture is stretched and stripy as seen in the picture above. It seams that changing my ...
-1
votes
1answer
177 views

Smooth Ramp to zonal harmonics

I have written in blitz3D some code to generate arbitrary 2D lighting lookup textures and I'm looking for a way to compress them. The idea is that they look rather smooth and low frequency, there must ...
-1
votes
1answer
424 views

Using Shader causes triangle to disappear

The following is my rendering code. Private Sub GameRender() GL.Clear(ClearBufferMask.ColorBufferBit + ClearBufferMask.DepthBufferBit) GL.ClearColor(Color.SkyBlue) ...
-1
votes
1answer
204 views

Shader applied to Texture is not showed in GLSLES

I'm trying to learn the basic of shaders following basic tutorials in Ogre. I use GLSL ES 2.0 #version 100 I think I have a basic concept problem. I'm trying to render a model + texture without make ...
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votes
1answer
102 views

How do 2D shaders work? [closed]

Yesterday I was wondering if an Arduino Uno could run some 2d shaders in a 3110 nokia screen (monochrome). But before all, I want to know understand how they work. Note: I want theory; ideas. Not ...
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votes
1answer
91 views

What's the difference between Rendering pipeline and compute shader?

What's the difference between rendering pipeline - https://msdn.microsoft.com/en-us/library/windows/desktop/ff476882.aspx and compute shader - ...
-2
votes
1answer
465 views

Incorrect rotations using openGL GLM and shaders [closed]

The goal of my program is to display a simple colored triangle rotating on the Y axis without any translation. I'm using the GLM library. The problem is that the transformations of my triangle are not ...
-2
votes
1answer
183 views

Does it matter where I initialize Directx11's shader constant buffer?

Should I initialize it before Map() or before `Unmap()? Does it make a difference?
-2
votes
1answer
350 views

List of GLSL ES built-in variables

I am writing an article on WebGL and three.js, I'm trying to search all the built-in variables available in the vertex and fragment shader. I've found many sites mentioning some, for example: ...
-4
votes
1answer
151 views

What's the difference between rendering and shaders?

What is rendering? What are shaders like vertex ,tessellation shaders etc? I am confused what's the difference between rendering and shaders? and how rendering is performed using shaders? Can we ...
-4
votes
3answers
636 views

Using a basic shader in libGDX

Looking at https://github.com/libgdx/libgdx/wiki/Shaders, I have decided to try these shaders: String vertexShader = "attribute vec4 a_position;\n"+ "uniform mat4 ...
-4
votes
1answer
160 views

My 2d Shader in XNA falls apart the second I put it into Farseer [closed]

I wrote a simple light shader that I tested in a simple 2d spaceship shooter and it worked fine. Once I imported it into my friend's farseer project with rotatable shapes, it doesn't seem to work ...