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

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5
votes
3answers
1k views

Multiple render targets and gamma correctness in Direct3D9

Let's say in a deferred renderer when building your G-Buffer you're going to render texture color, normals, depth and whatever else to your multiple render targets at once. Now if you want to have a ...
10
votes
2answers
1k views

Projective texture and deferred lighting

In my previous question, I asked whether it is possible to do projective texturing with deferred lighting. Now (more than half a year later) I have a problem with my implementation of the same thing. ...
3
votes
1answer
2k views

DirectX11, how to properly update a staging buffer with a structured buffer's count using CopyStructureCount

Alright, I'm not quite sure what is going on with my code at the moment. I'm currently getting around to defining behavior for my particle system, and to better do this I need to know how many ...
4
votes
2answers
584 views

Programatically replace color gradient on sprite

Say I have the following image: I want to tint the yellow parts on this sprites shoulder/arms by a random color. In other questions on this site, they suggest using a chroma key and replacing the ...
1
vote
2answers
191 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 ...
5
votes
1answer
1k views

Spherical fractal noise generator in shader

I have a growing sphere in space, and I thought of having a procedural generated texture over it. Since it is growing, I thought a fractal would be a great choice, because more details would be ...
0
votes
3answers
2k views

Adapting DirectX samples to SlimDX

I'm trying to learn DirectX and SlimDX but I'm having a terrible time getting started. I'm taking the Triangle tutorial and trying to add color and transformations. Starting with controlling color, ...
2
votes
2answers
6k views

XNA a Simple 2D Point Light

I want to make a 2D Point Light in XNA, I was able to find some helpful information but it is too advance for me, since i know nothing about Shaders ...
12
votes
2answers
4k views

Realistic metal shader

How do you create a good metal shader? For different metals and say more or less eroded / rusty and so on. I know that one difference from ordinary materials is that metal should 'colour' the ...
8
votes
4answers
1k views

Decent Shader editor for Visual Studio

Is there a decent Effect file editor plugin for Visual Studio? I'm getting slightly frustrated with constantly copying and pasting from FX Composer.
4
votes
4answers
1k views

Enconding/Decoding bit value in Texture Alpha Channel

I am Rendering to a SurfaceFormat.Color. (R8G8B8A8) The alpha of this format has 8 bits and I want to be able to use those 8 bits as a bit field. For example, in one pass of my render, I want to save ...
-1
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). ... ...
2
votes
2answers
1k views

Can a texture's UV coordinates be animated (scrolled) when part of a SpriteSheet?

Alright so my question is about texture manipulation in Flash Stage3D / Context3D using AGAL for the shader language. But I'm pretty sure this could be applicable in other situations involving GPU ...
2
votes
1answer
247 views

Basic knowledge for 2d gaming and images?

Can anybody refer me some pdf or ebook that i should follow for basic 2d programming and texture ,shaders and other gaming elements details in depth.By which i can easily get through the 2d game ...
33
votes
4answers
35k 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 ...
2
votes
1answer
495 views

Transformed Pretransformed coordinates?

I am creating a minecraft like terrain engine thing in XNA and C#, and I am trying to create a item/block selector tool. The thing is I would like to have 3D objects on the tool. So I thought for the ...
2
votes
3answers
2k views

Why even use shaders?

assuming I want my game to have a Cel-shaded look. There are plenty of tutorials how to implement Cel-shading in hlsl f.e. But what is the point? If I am creating my assets with Blender or 3d-max I ...
2
votes
1answer
475 views

How can I export models from 3DX Max into XNA?

I am looking for a way to import my 3D models (including materials and shaders) from 3D Studio Max to XNA. For example, if I have a model with diffuse, bump, reflection textures and values (through ...
5
votes
1answer
616 views

What is the point of this hard-coded vector when calculating luminance in glow/bloom effects?

I have looked at two different vertex shaders that calculate luminance and both use a "magic" vector that I'm not sure the meaning of the the actual values. For instance: const mediump vec3 ...
2
votes
1answer
375 views

Shader issues when creating projection using CreateOrthographicOffCenter instead of CreateOrthographic

Pre. Having these matrix transformations: var scale = Matrix.CreateScale(50f); var eye = new Vector3(0, 0, 10.0f); var view = Matrix.CreateLookAt(eye, Vector3.Zero, Vector3.Up); var projection = ...
9
votes
1answer
9k views

What do the components of gl_TexCoord[0] mean?

What are the differences between gl_TexCoord[0].s, gl_TexCoord[0].t gl_TexCoord[0].p and gl_TexCoord[0].x, gl_TexCoord[0].y gl_TexCoord[0].z ? I understand that gl_TexCoord[0].x, gl_TexCoord[0].y ...
4
votes
2answers
5k views

Changing the color of some fragment of a texture using shaders

Declarative programming language QML allows to connect the elements, their properties with universal variables in shader programs description. For these purposes there is such elements as ...
3
votes
2answers
278 views

Fire range arc behind buildings

need some help with HLSL. Each charater in my game shows a fire range arc (which is a textured model) which show how far the guy can shoot, see It looks ok, but I hate the fact that it shows even ...
9
votes
5answers
4k views

What rendering techniques would I use to draw a drop shadow effect for cards in a card game?

What type of shading algorithm might be used to create shadows like these? the one I'm making is similar but it is all done with a 2D drawing API powered by OpenGL so there is no Z coordinate. In ...
2
votes
0answers
1k views

How can I use the dualforward parameter in my unity shader to use lightmaps and normal maps together? [closed]

I'm using the free version of unity and I would like to combine lightmaps with specularity and normal maps. After doing a -bunch- of research, I've figured out that there doesn't seem to be any easy ...
0
votes
1answer
705 views

Some help understanding and modifying a 2D shader

I have a similar question as the one posed here, except that I don't wish to use a 1D Color Palette. I simply wish to have it display 1 color of my choosing (red, for example). I plan to use this ...
0
votes
1answer
955 views

Toon shader with Texture. Can this be optimized?

I am quite new to OpenGL, I have managed after long trial and error to integrate Nehe's Cel-Shading rendering with my Model loaders, and have them drawn using the Toon shade and outline AND their ...
2
votes
0answers
704 views

XNA 4 Deferred Rendering deforms the model [closed]

I have a problem when rendering a model of my World - when rendered using BasicEffect, it looks just peachy. Problem is when I render it using deferred rendering. See for yourselves: what it looks ...
1
vote
1answer
622 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 ...
6
votes
3answers
1k views

Is it possible to load shader files from a DLL?

I have a few HLSL files that I'd like to add into a DLL project so that I don't have to keep adding these same shader files into a new Content project every time I want to use them. Is this possible, ...
5
votes
1answer
1k views

How is this glowing with colors radiating outward 2D effect accomplished?

I'm currently totally at a loss as to how this effect is done: http://www.youtube.com/watch?v=zp8MHUNp7Cg The glowing on the ship and the changing color. I want to do this effect in XNA 4.0 any ...
1
vote
1answer
176 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 ...
8
votes
2answers
4k views

GLSL Shader Editors for Linux

Are there any good IDE's for linux that lets us edit GLSL shaders and visualize their effect? Note : Shader Designer By Typhoon Labs is a good option but I am looking for alternatives as this ...
11
votes
2answers
11k views

How can I create an efficient bloom shader with GLSL?

I have searched the net for resources related to rendering a bloom effect using GLSL, but haven't found anything. Although the tutorial at Philip Rideout's website is a good one, it performs very ...
4
votes
1answer
776 views

Why are my texture coordinates always (0,0) in this shader?

What I'm trying to do is add my depth buffers values to my scene, ie. I'm trying to make objects closer to the camera darker and objects further away lighter. Which should be easy: just render the ...
1
vote
1answer
167 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 ...
9
votes
1answer
9k views

DirectX11, how do I manage and update multiple shader constant buffers?

Alright, I'm having a hard time grasping how constant buffers are bound to a pipeline stage and updated. I understand that DirectX11 can have up to 15 shader-constant buffers per stage and each buffer ...
6
votes
3answers
7k views

What happened to .fx files in D3D11?

It seems they completely ruined .fx file loading / parsing in D3D11. In D3D9, loading an entire effect file was D3DXCreateEffectFromFile( .. ), and you got a ID3DXEffect9, which had great methods ...
3
votes
2answers
774 views

WebGL geometry calculations

I have a dynamic surface in WebGL, that is animated in vertex shader. I want other objects to interact with this surface (for example, an object riding on dynamic terrain). What's the best way to do ...
16
votes
1answer
965 views

What is the math behind the light effect in krakatoa?

I'd like to know the math behind the light effect in krakatoa (click here for an example). Light source is traveling with particles, but how is shading done? Is it something simple, like Phong ...
2
votes
1answer
1k views

Does OGRE do hardware skinning by default?

I am trying to understand how OGRE works at a lower level, and from what I have read so far, I believe OGRE generates shaders from material scripts using its RTShader system, on the loading of each ...
6
votes
2answers
3k views

Using a GLSL fragment shader to draw a texture in the middle of a quad

I'm not sure how possible this is, but I'm trying to use a fragment shader to draw a portion of a texture in the middle of a quad. This is all 2D. The quads consist of four vertices from (0, 0) to ...
24
votes
3answers
10k views

For voxel rendering, what is more efficient: pre-made VBO or a geometry shader?

Given a fairly static voxel array, what is more efficient: using the CPU to pre-generate a VBO to render the voxel faces (ignoring more advanced forms of rendering like marching cubes for now) or ...
3
votes
4answers
2k 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
1k views

How to not-unroll loops in Shader Model 3 HLSL

I'm working on raycaster in HLSL, unfortunately it have to be in DX9. But it cannot be compiled I did similar raycaster in DX11 and i know that there is always problem with FXC compiler that it tries ...
1
vote
1answer
1k 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 ...
5
votes
2answers
905 views

Which are the most futureproof languages for graphics (shader) programming? [closed]

I have written some GLSL and Cg shaders a couple years back. I am starting another graphics engine project and I want to choose my technologies carefully so that my code will be accessible years down ...
3
votes
1answer
918 views

How'd they do it: TF2 payload cart glow?

How did the creators of TF2 make the glow on the payload cart visible through walls? Is it possible to implement this in Unity's shaderlab?
39
votes
1answer
5k views

How can I reduce aliasing in my outline glow effect?

I'm trying to replicate the glowing outline effect in the Left 4 Dead game. The effect causes an objects outline to glow, even when the object is occluded. Here is a screenshot of the effect: I'm ...
5
votes
3answers
940 views

Can anyone recommend a 3D model viewer with shading? [closed]

I am looking for a simple real-time OpenGL based render engine to show a 3D model on screen. I prefer using 3DS Max's 'shader' materials (real-time materials) for editing. Do you know any good ...