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

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1answer
483 views

VertexColor shader is not working correctly in built application

I want to change the vertex colors of my mesh. The light sources must not affect the objects with this shader, its lighting must be determined only by its vertices colors, so I turned the Lighting ...
0
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1answer
16 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
42 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 ...
2
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1answer
1k views

glsl shader to allow color change of skydome ogre3d

I'm still very new to all this but learning a lot. I'm putting together an application using Ogre3d as the rendering engine. So far I've got it running, with a simple scene, a day/night cycle system ...
1
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1answer
583 views

OpenGL Tessellation makes point

A little problem with my tessellation shader. I try to implement a simple tessellation shader but it only makes points. Here's my vertex shader : out vec4 ecPosition; out vec3 ecNormal; void ...
6
votes
1answer
287 views

How is Signed Distance Field Ray Marching implemented for a dynamic world?

I think I understand the basics of Signed Distance Field Ray Marching. You model your scene with a bunch of distance fields (such as these: ...
1
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1answer
285 views

Trying to implement Camera

I'm trying to implement a Camera class in order to walk and look on the world as follow: #ifndef _CAMERA_H_ #define _CAMERA_H_ #include <glm\glm.hpp> class Camera { public: Camera(); ...
2
votes
1answer
153 views

Unity5 - A Shader to blur far plane edges?

I need some help. In my Unity5 game I'm using two cameras, First camera renders the actual terrain and game objects (wich has a far plane of a 1000 units) and the Second camera renders a 3d skybox of ...
1
vote
1answer
443 views

Mesh fading to transparent

I have a 2D Mesh object generated at runtime painted all with uniform color. I want that mesh to have its color fade to transparent color close to the edges. Despite I searched everywhere I could not ...
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
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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
212 views

Fragment shader compiling in webGL but not in OpenGL

I am programming in Haxe (language compiling to multiple platforms) and I have written some shaders. My fragment shader runs fine in html5, but when I try to compile for native (OS X and/or Neko, a ...
0
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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 ...
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
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 ...
3
votes
1answer
105 views

How to write a custom shader in Unity 3D that lights up a specific pixel or group of pixel?

I'm making a FPS game in Unity, and I want the environment to light up as the player is shooting on his environment. The map would be entirely put in darkness at the beginning, but as the player ...
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 ...
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 ...
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 ...
2
votes
1answer
190 views

Apply a special effect to an scene area

My 2D game has a second camera on the scene that renders an upside down image of the scene and distorts it, giving the effect of water reflection. I render this camera first, and on top of it I render ...
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
1answer
110 views

White dots artifacts when applying borders to hex tiled geometry

I have a hexagon tiled geometry I created in Blender Which I then load in WebGL, using THREE.js library. Below is the loading code, I've cut the code of creating scene, lights, etc. I create ...
1
vote
1answer
1k views

OpenGL Shader Storage Buffer Objects array length problem

Ok guys, I think I have a very strange problem. I have an old laptop, but its HD 6370M currently supports opengl 4.4, so i decided to learn how to use some new features of this platform, so after ...
1
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0answers
101 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 ...
2
votes
1answer
1k views

How do I create a manual object with colors for each vertex?

How do I create a shaded manual object with colours for each vertex? Eg if ogreObj is the Ogre::ManualObject : ogreObj->begin("BaseWhiteNoLighting", Ogre::RenderOperation::OT_TRIANGLE_LIST); ...
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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 ...
2
votes
1answer
5k views

Additive “Sprites/Default” shader

The Sprites/Default shader multiplies the color with the provided tint, while I need to add it instead. I fixed this copying the shader (taken from here) and simply changing the line return ...
0
votes
1answer
124 views

DX9 How to Apply HLSL Shader with StretchRect

Using DirectX 9,I'm trying to run a HLSL pixel shader on video frame data while copying it from one texture buffer to another texture buffer without displaying it. StretchRect at the end is what ...
1
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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
48 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
2answers
651 views

translate-scroll repeated 2d texture using opengl shader

I managed to implement an infinite 2d texture scrolling using the following shader. btw I'm using cocos2d-x 2.2.1. The vertex shader: attribute vec4 a_position; attribute vec2 a_texCoord; #ifdef ...
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 ...
0
votes
2answers
749 views

Using Appendbuffers in unity for terrain generation

Like many others I figured I would try and make the most of the monster processing power of the GPU but I'm having trouble getting the basics in place. CPU code: using UnityEngine; using ...
3
votes
0answers
43 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 ...
2
votes
1answer
275 views

Run HLSL in C++ Basic Sample

I'm considering the idea of taking shaders written in HLSL and running them in an AviSynth plugin to process videos. This would allow accessing various shaders, and also to have GPU acceleration. I'm ...
1
vote
1answer
79 views

libGDX upload z-axis of sprite to graphics card

Background: I want to obtain each fragments position via vertex interpolation to then calculate the light vector for phong shading (L = [Fragment pos] - [light source pos]). Problem: At the moment I ...
1
vote
0answers
47 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 ...
3
votes
2answers
601 views

Stencil based mask with alpha

I'm trying to create a fog effect like civ 5: I tried creating a StencilSet shader that receives a mask and sets the stencil buffer to 1. I would render the following on every unexplored tile using ...
1
vote
1answer
556 views

Using GrabPass for 2D water reflection?

I'm trying to achieve some neat 2d water reflection effect with Unity, something like this: What I've managed to accomplish so far: The problem is GrabPass captures the entire screen but I really ...
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 ...
2
votes
1answer
421 views

2D Hidden Object Silhouette Shader

Right now I am not using any depth information in my engine, but I just found out that it would be neat to be able to render the silhouette of important game objects that are "behind" something with a ...
1
vote
1answer
85 views

Second pass in multipass effect is ignored

I am trying to render my vertecies in 2 passes, but it seems I am doing something wrong, because only one pass applying. I cannot make the second one work despite that second pass is applying. Here ...
2
votes
1answer
46 views

Shader constant management problem in DirectX 11

I've been learning the "dragon book" written by Frank D. Luna and trying to implement the part of the demo on my own. As some of you can see, the demo of the book uses effects interfaces to update the ...
-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 : ...