a computer program that runs on graphics hardware and provides a high degree of control over how scenes are rendered
0
votes
1answer
17 views
GLSL uniform array with size set by another uniform
Will the follwing GLSL code work?
#version 330
uniform int size;
uniform float[size];
void main() {
//do something
}
3
votes
1answer
43 views
Upgrading Unity from 5.1 to 5.3.4 has broken game, specifically models made in Blender
I recently decided to upgrade Unity after putting it off for some time as I have a rather sizable project started in 5.1. I knew there would be some hurdles, however, I have had very little luck in ...
1
vote
0answers
20 views
Unity Shader blending colors and color values above 1
I have source images where each pixel is one of exactly 4 colors:
red = (1,0,0)
green = (0,1,0)
blue = (0,0,1)
black = (0,0,0)
I'm trying to modify Unity's default sprite shader to use those ...
0
votes
2answers
57 views
How to optimize this branching instruction?
I have an outline shader, which samples my texture 8 times to compute the outline.
The problem is, that there's transitional alpha values between picture and background. To cut them off I'm using the ...
0
votes
1answer
40 views
When do I need to call `glUseProgram`?
Looking at examples at http://learnopengl.com/#!Getting-started/Hello-Triangle and many different places, I've found that the draw sequence usually goes like this:
// setup VBO, VAO, load shaders
...
0
votes
0answers
10 views
How to do an xBR or hqx filter in MonoGame?
I have been trying to implement an HD filter (xBR or HQX) in my MonoGame game project but so far got no success. I have checked out this question, but the shaders provided in the answers don't seem to ...
1
vote
0answers
102 views
How can I create a wind visual effect like Ori?
I'm working on a mobile game in Cocos2D. The game mechanic is very similar to Ori and the Blind Forest's parachute (Kuro's feather) mechanic. I want to be able to render a visual effect for wind ...
0
votes
0answers
28 views
Pixel Perfect Texture Sampling
Right now I am using the following two shaders to render a sprite from a texture used as a sprite atlas onto a canvas that has canvas_size pixels in screen coordinates.
I use a static quad as input ...
1
vote
0answers
11 views
Unity: Built-In Shader Transformation Explanation Resource
I'm working on some of my first shaders and taking a look at the variables included by cginc I see this list of transformation matrices:
I've watched some beginner talks and I understand what the ...
0
votes
1answer
20 views
Opengles 2.0, Replace the black region in the image to make it transparent
I have two textures, Source image A and Overlay B, B is drawed on top of A, I want to replace the black color in B, then make the region of A visible, what should I do?
This is my shader language:
...
3
votes
1answer
87 views
Sine-based Tiled Procedural Bump
I am trying to implement this formula to generate bump but I am facing some issue. The result doesn't look the same it's much darker.
Here is my result (without same parameters) but it is much ...
0
votes
0answers
49 views
vertex shader doesn't work properly
Linux, OPenGL 3.0, GLSL 130 (Intel card)
I'm learning OpenGL and successfully rendered a triangle, but as soon as I create the matrix of projection I get an error. The shader compiles and works ...
0
votes
0answers
24 views
YUV target on GL_TEXTURE_EXTERNAL_OES
I am using a surface texture bound to GL_TEXTURE_EXTERNAL_OES. I read that the GL_TEXTURE_EXTERNAL_OES texture target is usually in a YUV color space. I want to take "y" value for each pixel in ...
1
vote
1answer
34 views
Unity simple solid color alpha shader
I searched for a shader, where I can set a solid color, which I can fade in or out like I want. There is not such a thing build in as far as I could see. Now I got this code, which works fine in case ...
3
votes
0answers
44 views
Spherical Area Lights do not match reference
So I'm adding spherical area lights to my application, and comparing my results with mitsuba, I am getting some differences (left is my approach, right is mitsuba - a pathtraced reference):
What I ...
0
votes
1answer
43 views
Solution for Shipping Optimized and Minified GLSL?
I've tried to find a reputable optimizing compiler for GLSL that takes source shaders, performs what optimizations it can statically assume, and outputs a minified GLSL file with optimizations, ...
0
votes
0answers
31 views
Profiling frame rate in shader
I used adreno profiler to profile a mediaplayer shader application:
source : https://github.com/crossle/MediaPlayerSurface/blob/master/src/me/crossle/demo/surfacetexture/VideoSurfaceView.java
The ...
0
votes
0answers
43 views
How do I procedurally generate a histogram from an image?
I have a media player application which uses shaders. I'm searching for the best way to generate a histogram for the displayed image.
I've thought of these 2 approaches:
Generate histogram using ...
1
vote
0answers
48 views
Is it possible to use true Blinn-Phong lighting on Unity Android/IOS?
I've noticed that the Unity's Legacy Shaders/Specular shader does not work on mobiles due to the lighting model being incompatible. I then tried using the Mobile/Bumped Specular shader, but this ...
0
votes
0answers
27 views
Shader questions with regards to the SpriteBatch in XNA/MonoGame
So I've finally decided to create my very own GUI system. And I'd like it to use shaders for pretty much all rendering. Think "WPF/Direct2D Brushes". Except to my knowledge, using shaders with the ...
1
vote
0answers
17 views
A question about Decal projection
From my understanding, there are several different ways to implement decals, from screen space, to copying geometry, but I can never find an explination of it's math.
So what exactly is the math ...
4
votes
0answers
36 views
Irradiance Map ( Irradiance environment map)?
As irradiance map is generated for every possible normal for all the texels in environment map (as every texel act as a light source) so that we can look up irradiance map, based on normal of fragment ...
0
votes
0answers
31 views
Billboard a quad to a position
I am trying to make a custom billboarding effect. I know that standard billboarding causes a quad to always face a camera, taking the camera position and view direction into account. I want a slightly ...
1
vote
0answers
32 views
How to have a gradient blur in objects on Unity?
This is related to a previous question I've asked here:
How to blur entire scene but a specific spot in Unity?
At the time I managed to solve my problem with a "hard" cutoff on the blurred and ...
-1
votes
1answer
123 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
vote
0answers
26 views
Combining skydome and fog
I am developing a 3D game in DarkBASIC Professional, and I have a theoretical problem with the combination of skydomes and fog in general. My question is not specific to a programming language, so I ...
0
votes
0answers
42 views
How to create Line of Sight shader?
I have an algorithm to build my sight polygon: https://www.youtube.com/watch?v=x7tFnVX11x0
I want now to create a visibility from it that is similar to this: ...
0
votes
0answers
33 views
Failed to pass uniform in Metal shader modifier
I'm trying to write a simple shader able to pass the color to be used for drawing in the fragment shader, through a uniform. I load the shader modifier and pass the uniform:
let fragmentShaderPath ...
0
votes
1answer
47 views
Strange shadow behavior when light direction is parallel to a plane
i have a strange problem with shadow acne. It occurs when the light direction is parallel to a plane. Here is my code and a few images of the problem:
//this calculates the shadow matrix
...
0
votes
1answer
41 views
Does Specular Power affect the Brightness?
I read the book Real-Time Rendering, 2nd Edition. Somewhere in there it say:
But I did the experiment and concluded that the mshi doesn't seem to affect to the brightness (it causes the area just ...
1
vote
1answer
34 views
About HLSL array packing policy
This is not a question but a confirmation if I'm correct about the behavior of HLSL arrays.
I'm working with a standard lighting vertex shader, HLSL plus C++, DirectX11.1 API. For storing my lights ...
3
votes
0answers
124 views
Schlick Fresnel Shader
I hope you are all doing ok. I have an issue with my Fresnel shader that doesn't allow the Fresnel to change as my camera moves around. I'm not sure what i'm doing wrong. I'm using glsl with the ...
8
votes
2answers
162 views
Why is the distance from object to eye irrelevant in illumination models?
For example in Phong model and Blinn model, the light intensity does not change depending on how far away the camera is. Why is that?
1
vote
1answer
38 views
Doubts with results of per-vertex lighting shader
I'm researching simple shaders to add to my DirectX 11 project such as a per-vertex diffuse shader plus specular reflection component.
I'll begin with the results:
Seems specular reflection is ...
0
votes
1answer
50 views
GLSL Shader not compiling (Android & LibGDX) and no log available
I'm trying to get a "ripple"-shader working for OpenGL ES 2.0+ (using LibGDX).
However, I can't get it to compile, and for some reason ShaderProgram.getLog() returns an empty string even though the ...
0
votes
0answers
60 views
water shader - different wave speed among the mesh
I'm working with Unity, but I'm trying to phrase my question in a more general way. Imagine you have a plane with a water shader/script on it. With the help of a scrolling/moving bump map the water ...
0
votes
0answers
51 views
vert/frag custom shader - Shadow is not correct, showing strange artifacts
I am new to shader writing, I want to drop shadows in my own shader, but unluckily I am getting a strange behaviour. When I apply a simple surface shader (Lambert, written in unity shader lab) it ...
0
votes
2answers
91 views
How do I draw individual pixels in the distance?
Hello everyone I am working with unity3d and I am faced with a task. I have a list of 3D points and I want to draw a pixel for every point on the list that exists after my cameras frustums far-plane. ...
0
votes
2answers
47 views
Hide building roof & Hide faces/vertices depending on world location
I'm currently developing a small game for my own enjoyment and I've ran into a problem. As you probably know many third person games (such as Runescape and XCOM, for example) hide the roofs when you ...
1
vote
0answers
24 views
How to set a specific face's texture color in Unity?
First off, let me describe my situation...
So I'm building a voxel engine based on this tutorial. I'm using my own texture tilesheet. Most of the tiles have their own color except grass, leaves, and a ...
0
votes
1answer
24 views
Axis Aligned Bilboards in shader
Hi I need to implement following effect using vertex shaders.
Basically its a shader for particle laser beam that rotates to particle along its own y axis till its "best" visible (Roughly).
My idea ...
0
votes
1answer
69 views
Custom Terrain Shader Normal Map Issue?
I've been developing a custom terrain shader in Unity. And I've been having problems with my normal maps.
Even after hours of fiddling I still haven't fixed it yet.
There are 2 noticeable issues:
1. ...
0
votes
1answer
40 views
Iris-wipe shader not properly working
I'm working on creating an iris wipe transition, like the ones you see in old cartoons - a fully transparent circle closes on a certain point, leaving a full screen of a solid color. Additionally, the ...
9
votes
1answer
132 views
Cycling through colors with the same brightness
Ok. So I have a game I am working on with a bunch of colored particles. Each of them gets their own color however they are all close to a specific shade.
To explain that better I am using the HSV ...
6
votes
1answer
239 views
How to do Chromatic Aberration on a transparent background?
I have a problem with a chromatic aberration shader effect...
If I produce the effect on a white background I get exactly what I want:
But if I do the same effect on a transparent background I get ...
3
votes
1answer
62 views
Super formula on shader
I'm using Shader-toy to experiment and try to learn a bit the shader science.
As exercise I wan to replicate some of the wikipedia math plots. I've started with a Super Formula.
What I want to ...
0
votes
1answer
59 views
OpenGL GLSL vector of sampler2D
If im trying to create an obj. file loader in c++ and draw it with opengl i need to use multiple textures in the fragment shader.I know i can just use:
`uniform sampler2D Texture1`
`uniform ...
1
vote
1answer
94 views
How to reproduce this triangle filling scanline effect using a shader?
I'm writing a renderer for an old DOS game were 3D polygons were rendered in software. I'd like to simulate, using a shader, the following material/effect, used for filling a triangle :
The fist ...
0
votes
0answers
42 views
Wrap Mode: Scale and Position Anywere
I am trying to write a shader in Unity that allows me to place my texture anywhere on the UV. Picture this for a second, if you add a texture on a square plane, the texture gets either stretched to ...
1
vote
1answer
65 views
Replicating a worldspace sphere on screen space
I have quite some struggle with a post processing shader that I'm working on.
I use Unity, and I have a shader in which I want to, in screen space as part of post processing, render a sphere that ...
