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

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2
votes
2answers
93 views

Opengl Quad Tessellation Control Shader

I have the generic tessellation evaluation shader for triangles but I need to make it work for quads. Is there any chance someone could explain what is happening here and point me in the right ...
1
vote
1answer
544 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 ...
0
votes
1answer
55 views

Shader that draws just vertex points

The game I am developing is in unity and I want to make a shader which can be put on a mesh that only 'draws' color on each vertex point. I am not proficient with shaders, and out of all my searching ...
0
votes
1answer
89 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(); ...
0
votes
1answer
43 views

Java LWJGL - How can I add water to my 3d world?

The title says it all, how can I implement a simplistic water system into my game? I am using Java LWJGL and OpenGL glsl shaders. I am still fairly new to game programming, and a complete noob in the ...
0
votes
0answers
44 views

OpenGL shaders with OOP languages and game engines [on hold]

Is it okay to encapsulate all the dirty shaders codes inside a class object, and then let the user call easy methods such as Render()? I've done this with a simple Skybox object and I wonder if this ...
1
vote
1answer
93 views

Discard Transparent Pixels in Z-Buffer

I am building a 2D game using sprites. I'd like to use the z-buffer to aid with shading. For that I need Unity to write only opaque pixels to the z-buffer (aka depth buffer). In Unity, sprites are ...
-1
votes
1answer
31 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
vote
1answer
48 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 ...
2
votes
1answer
54 views

VS2013: Compiling Shaders with Shader Model 5.0

When I try to compile two HLSL files included in my project, the compilation fails with an error: Error error X4502: invalid vs_2_0 input semantic 'INSTANCE' However, I notice it's trying to use ...
0
votes
1answer
172 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
votes
0answers
85 views

2D Distortion shaders for water effect

I'm working on Unity, and I'm trying to improve my water. The water will be seen top down, and I want to apply a shader to it to make it better looking. I understand the concept of distortion shaders ...
2
votes
1answer
221 views

How do I use unpackHalf2x16?

I'm trying to use (un)packHalf2x16, without success so far. I'm drawing with: glVertexAttribIPointer(0, 2, GL_UNSIGNED_INT, 0, 0); glEnableVertexAttribArray(0); glBindBuffer(GL_ARRAY_BUFFER, vbo); ...
1
vote
1answer
62 views

What's wrong with my method of getting intermediate rendering to my postprocessing shader?

I'm working on a project in OpenGL. Earlier this week, I successfully implemented Deferred Shading, but I'm not sure how to pass the information from the Deferred Shader to the Post Processing Shader. ...
12
votes
3answers
3k views

How do I control which calculations are done on the CPU and which are done on the GPU?

My current understanding is that anything done in a shader file is done on the GPU, and anything done in my (Java, in my case) code is done on the CPU. Is this an accurate description?
1
vote
1answer
185 views

Why does my depth test fail on Nvidia cards?

I sent a test version of my in-development game to some friends, and they found out that the Depth Test in OpenGL does not work on Nvidia cards. I'm using LWJGL. I use my own matrices and send them ...
1
vote
1answer
61 views

Explaining Unity Sprite-Default Shader

I would like to know why we would use alpha blending in that shader for just rendering a sprite, which is just a texture ? What is tint color ? Why we multiply the alpha value by the color here ? ...
0
votes
2answers
18 views

Setup VertexPositionTexture array for a texture2D at a location

I am trying to adjust the following code to render a quad on a 2D texture at a specific location and specific size. Currently this code will render a fullscreen quad, which makes sense since the ...
1
vote
1answer
85 views

Problems with texture orientation in space

I am currently drawing texture in 3D space and have some problems with it's orientation. I'd like me textures always to be oriented with front face to user. My desirable result looks like ...
0
votes
1answer
73 views

Having trouble getting shader to work with sprite batch in XNA #4

I found a neat "CRT screen" effect shader on the web, but I've never used shaders before and I can't seem to get it working properly. If I do the second sprite batch in my code here normally without ...
0
votes
0answers
54 views

SFML - Rendering a torch with a fire animation [duplicate]

I have coded a 3D maze simulator in SFML using raycasting. However, I want to add a torch to the screen, so that the lighting seems more realistic. From my understanding, I would have to use ...
0
votes
1answer
40 views

What are .fxo and .cod files for?

I've been reading about shaders and looking at code. I found this in the code I'm looking at and it obviously has "Basic.fxo" there. BasicFX = new BasicEffect(device, L"FX/Basic.fxo"); Now my ...
0
votes
1answer
248 views

When should I set a texture as a shader resource in order to read it?

I'm writing a Direct3D 11 HLSL shader with SharpDX. What I want to do is write the depth to a texture in one pass and read it in the next one. After declaring the texture, do I have to set the depth ...
0
votes
3answers
85 views

How to render grid properly, especially over distance?

I'm drawing a grid, pretty much like one can see in the Unity editor itself or any 3D-editor, many 3D-related applications and some games. But it doesn't look pretty in my case. I put a few random ...
1
vote
1answer
63 views

How can I make this shader background more efficient?

I want to use a shader as a background for a mobile game. I'm using libgdx for my project. I've never written glsl before, but here's my attempt so far: http://glslsandbox.com/e#22332.13 On desktop ...
2
votes
3answers
197 views

Generating 3D-like effect

I'm making a 2D sidescroller game and want to give the blocks a 3D like effect. This way it looks like the player is walking on 3D blocks while walking on a 2D plane (thus having only x,y ...
0
votes
1answer
38 views

Discarding triangles in Unity

I have about 2+ years of experience in computer gaming development and I just started writing my own shaders to help me utilize performance. I have this problem that I'm trying to work around but ...
1
vote
1answer
61 views

Shader - Realtime texture masking

The first thing that comes in mind is masking using RGBA values. With this you can obtain this kind of textures and this kind of results. But with this, you can only store up to 4 masks inside a ...
3
votes
1answer
458 views

Spritebatch Vertex shader world matrix change after each draw

I have a spritebatch where I draw some textures transformed in 3d space. The easy way was just Begin with the transformation matrix, draw, and end it right after. But that is silly, so I'm trying ...
1
vote
2answers
111 views

Replace each white spot of image to radial gradient

Recently, I read an article about a sun shader (XNA Sun Shader) and decided to implement it using OpenGL ES 2.0, but I encountered a problem with the shader: I have two textures, one of them is the ...
0
votes
1answer
101 views

GLSL: Vertex attribute to int

I'm trying to write a shader which renders a multitextured geometry wihout rerendering the geometry with each texture. In my test I'm not using textures, I just convert the texture index to a color ...
0
votes
1answer
49 views

Reasonable texture Formats for VertexTextureFetch in GL

Wich is a reasonable GL version that have support for vertex textures fetchs(VTF) in OpenGL ? (for example GL 3.0, 3.1, 3.3) What textures formats should I expect to be supported in average video ...
0
votes
2answers
237 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
1answer
327 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 ...
0
votes
0answers
23 views

Encoding Floats to RGBA and Blending causing artifacts

I am using float packing to encode a float value inside a RGBA texture because I don't have access to float texture unfortunately. Here are the function I am using for encoding and decoding. inline ...
0
votes
1answer
43 views

How is this particular HLSL condition treated with respect to compile- or run-time evaluation?

Let's say I have this very simple pixel shader (cbuffers and other stuff omitted) float4 PS(VertexOut pin, uniform bool useLighting) : SV_Target { float4 retColor = gDiffuseMap.Sample( sampler0, ...
0
votes
1answer
28 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 ...
27
votes
4answers
21k views

Using multiple shaders

I'm currently studying opengl shaders but I can't figure out something: how to apply different shaders to the objects, for example, a teapot rendered using toon shader and another one in the same ...
7
votes
1answer
452 views

How to implement this kind of ripples with a GLSL fragment shader?

So I have already implemented the reflection part: uniform sampler2D texture; uniform vec2 resolution; uniform vec3 overlayColor; void main() { vec2 uv = gl_FragCoord.xy / resolution.xy; if (uv.y ...
0
votes
1answer
48 views

Cubemap faces rotation in GS shader

I Can't get correct rotations for cubemap faces. Thats should come to geometry shader, from camera "view" matrix I want make 6 faces for my cubemap, but seems I can't get it correctly... My first ...
3
votes
2answers
70 views

In XNA 4, how can I access SpriteBatch's transformMatrix in my shader?

I would like to use a custom effect with a regular XNA SpriteBatch. I have a 2D camera which computes a transform matrix, so I need my shader to take this into account. I have put a world matrix ...
8
votes
1answer
313 views

Creating a glitch effect similar to Watch Dogs

I'm currently working on a LibGDX game. When a user does something wrong, I would like all the graphics on the screen to jitter very similar to the glitch/distort effect seen in the game Watch Dogs ...
0
votes
1answer
81 views

Fragment Shader output type error

StackExchange! I've been working with opengl for a bit and I'm trying to finally load the shaders instead of having them inline. I'm having a ton of issues, though. As soon as I solve one, another ...
2
votes
1answer
99 views

How can I create a screen-space distortion effect?

I am trying to create a screen-space distortion effect using shaders. This image demonstrating the effect I'm after is from Nvidia: Let's consider that I have access to the background texture. How ...
1
vote
3answers
144 views

2D HLSL World position

I'm trying to get world position from my vertex shader to my pixel shader so that I can disable the shader once a preset X coordinate has been passed (no shading once I'm over X). Getting the screen ...
2
votes
1answer
48 views

The way of avoiding branching for textured and not-textured objects

I know that branching is an expensive operation on GPU (not as much as it used to be, but still). The most common situation where I use branching is when I have both textured and non-textured ...
0
votes
0answers
120 views

Slick2D shader crashes, but only after a while

I'm using Slick2D's ShaderProgram for shader-based drawing in my game. Some players report that after 3-10 minutes, the game inevitably crashes hard during what appears to be a setUniform4f operation ...
2
votes
4answers
1k views

Multiplatform GLSL shader validator?

Im working on a multiplatform (Pc,Mac,Linux) game that uses shaders quite extensively. Since we do not have any funding, it is pretty hard to test our game on all possible hardware configurations. ...
0
votes
1answer
58 views

Drawing a Line in 3D using DirectX 11

I had a lot of problems to draw a line in a 3D and had a weird results.. The 3D Lines are projects in 2D and that's so weird. They only work with that view matrix configuration: XMVECTOR Eye = ...
3
votes
2answers
69 views

How can I draw curves above a mesh surface?

I am making an animation of a deformed sphere that represents some aspects of the wave function in a hydrogen atom. I am starting with an octahedron that i push through a tessellation shader. The ...