Texture is a bitmap (raster image) used in a texture mapping process.
2
votes
1answer
269 views
How to load a png file without alpha premultiplying in ios?
I am making a game in which I use the alpha value, in some cases for transparency, in others for occlusion, and for HDR in others.
I'm loading the images like this (this is MonoTouch, but objective-c ...
7
votes
2answers
379 views
Why are some games using some dithering pattern instead of traditional alpha for transparency?
Recently, I have seen some 3D games (eg: GTA IV) to use some kind of ordered dithering to simulate transparency / alpha.
The polygons are not transparent as usual, but instead render a dithering ...
3
votes
2answers
147 views
How to use images/text/etc. in XNA without Content Pipeline?
I'm currently writing a program in C# with the XNA framework. It is absolutely necessary for the game's images and text assets to be visible by the end user in the form of PNG files, so I can't use ...
3
votes
4answers
380 views
XNA 2D Spritesheet drawing rendering problem
I'm making a tile-based game, using one spritesheet containing all tile graphics.
Each tile has a size of 32x32 pixels.
The main problem is: when I draw the tile to the screen, if the tile position x ...
0
votes
1answer
403 views
How can I implement 3D textures using webgl?
I went through the google I/O video but did not get exactly how to do it. If somebody could point me to a simple 3D texture implementation using webgl, it would be helpful.
i basically have a volume, ...
0
votes
0answers
94 views
How to Detects two markers at time using Vuforia SDK
I recently has been watch this Video, and this is good to know that its developed by qualcomm. I want to do same sort of project in Unity3d, I already have developed few apps using Vuforia SDK. Before ...
2
votes
1answer
145 views
Any drawback to using rectangular textures over square textures in OpenGL?
I'm thinking about texture atlas generation where I'd have to choose the dimensions of my atlas, constrained both by my sprites and by the maximum texture size of the current platform.
Given that, is ...
0
votes
1answer
350 views
Blender: projecting an image via a spotlight onto a plane
I've create a plane with a spot light shining from above onto it. The spot light projects a texture of an image onto the plane. The light shots out at an angle but the texture is projecting in a flat ...
0
votes
1answer
134 views
Cocos2d patterns for simple texture management
I'd like to simplify the way I preload image resources in my Cocos2d based iOS apps. I've created a small object the just wraps a few of CCTextureCache's methods. It looks like this:
@interface ...
1
vote
0answers
86 views
glFramebufferTexture2D gives corruption with cube map textures
I am using glFramebufferTexture2D with cube map textures but it gives corruption in texture. draw_cube() function works perfectly when i draw that on default framebuffer.
GLenum ...
0
votes
0answers
115 views
2D Textures are shown through objects in front of it(OpenGL)
I am learning to use pyglet and learning about applying 2D textures to planes in pyglet. When I apply the 2D texture to the plane it works fine. When I make multiple objects with the same texture , ...
2
votes
1answer
99 views
Texture prefetching in GLSL
I have a fragment shader which needs lots of semi-random access to 32x32 texture patch. Fortunately, the patch is constant for each poly, so there should be no issue storing the whole thing to the ...
0
votes
0answers
143 views
How to add render able Texture in Unity 3d for iOS
I want to render an image on texture which should be stuck at one point, not stuck with Camera. I don't know how to accomplish this task because I started unity a week ago but I want to do this task ...
0
votes
0answers
11 views
Show 3d object on device live camera in Unity3d for iOS [duplicate]
Possible Duplicate:
How to add render able Texture in Unity 3d for iOS
How render a 3d or 2d(.jpg or .png )object at device live camera in Unity3d, and this 3d object shouldn't stuck with ...
4
votes
1answer
418 views
OpenGL ES 2.0 texture distortion on large geometry
OpenGL ES 2.0 has serious precision issues with texture sampling -
I've seen topics with a similar problem,
but I haven't seen a real solution to this "distorted OpenGL ES 2.0 texture" problem yet.
...
0
votes
1answer
183 views
Texture will not rotate with gluSphere
I have a gluSphere generated in my display that is rotating, but having a problem with the texture rotating with the sphere as well. So in a nutshell, no matter how the sphere rotates, the texture ...
1
vote
1answer
178 views
MultiTexturing by neighbouring points textures
Visual example:
I've been trying to understand multitexturing for a while now, I've created a terrain generator but have no need for height just yet and I still want one texture to blend over to ...
1
vote
2answers
249 views
VBO with texture index buffer different than vertex index buffer
I am trying to write my own OBJ importer and renderer in OpenGL (yes, I know, reinventing the wheel) and I found a problem that I don't knwo how to handle.
In an OBJ file faces are defined by a list ...
2
votes
1answer
56 views
Getting an instance of KX_PolygonMaterial in Blender
I've got a question concerning using Python in Blender's Game Engine.
Before I start I want to state that I'm trying to change the color of an object in Blender's game engine. To do this, I'm ...
0
votes
0answers
147 views
Regarding Multisampling of textures [closed]
i am rendering white cube with green background in non default FBO and attaching the created multisampled texture to this FBO. When i render a cube in default FBO using above texture, it gives ...
5
votes
1answer
213 views
How to draw a trapezoid in OpenGL?
The question seems easy, but you simply change vertex positions to match the corners of a trapezoid but it simply fails. I've tried scaling top and bottom edges like this :
but when I apply my ...
1
vote
1answer
90 views
Multisampled Texture
i have some doubts with multisampled textures.
In fragment shader, how to pass multiple samples?
We use glTexImage2DMultisample instead of glTeximage2D. so, how to upload texture data?
I want to ...
4
votes
1answer
122 views
How do I get a Model to add a name to it's Texture(s) in the XNA Content Pipeline
I know that a texture's name is not preserved when it's loaded in. I also know that you can give it a name. For example:
Texture2D texture = content.Load<Texture2D>("MyTexture");
texture.Name ...
17
votes
6answers
2k views
Creating a retro-style palette swapping effect in OpenGL
I'm working on a Megaman-like game where I need to change the color of certain pixels at runtime. For reference: in Megaman when you change your selected weapon then main character's palette changes ...
8
votes
5answers
313 views
Texturing an asteroid
I'm trying to texture this asteroid so it looks reasonable. I'm missing something though.
Following this tutorial, I got this so far.
Now I don't understand the next step: how do you resolve the ...
5
votes
1answer
112 views
Blend multiple regions from same texture atlas
I'm representing terrain in my game as a grid with at each node a composition, for example 100% rock, or 50% grass, 50% soil. I'd like to use this composition vector to blend textures together. I'm ...
5
votes
4answers
245 views
Would like some help in understanding rendering geometry vs textures
So I was just pondering whether it is more taxing on the GPU to render geometry or a texture. What I'm trying to see is whether there is a huge difference in rendering two scenes with the same setup:
...
0
votes
0answers
48 views
System hangs at glReadPixel call with GL_TEXTURE_2D_ARRAY for texturing
I am calling glReadPixel after glDrawArray call. I am rendering a geometry with 3D texture on it as a target GL_TEXTURE_2D_ARRAY. My systems hangs at glreadpixel call. When i use target as ...
1
vote
1answer
85 views
TexturePacker ignores extensions
I'm using TexturePacker in one of my games, though when packing a bunch of textures their extension is kept in the data file. So when I want to find a texture I need to search for "image.png" instead ...
2
votes
1answer
131 views
Tutorial on OpenGL texture formats
Looking at the documentation glGetTexImage(), one can see that there are plenty of available texture formats.
GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_2D_ARRAY, ...
1
vote
1answer
164 views
Unity3D and Texture2D. GetPixel returns wrong values
I'm trying to use Texture2D set and get colors, but I encountered a strange behavior.
Here's the code to reproduce it:
Texture2D tex = new Texture2D(2,2, TextureFormat.RGBA32 ,false);
Color col = ...
0
votes
0answers
274 views
3D texture coordinates for a cube
I want to use glTexImage3D with cube. what will be the texture coordinates for it? i am using GL_TEXTURE_3D as target. I tried with u v coordinates same as 2d texture coordinates with z component ...
2
votes
2answers
163 views
Splitting a texture atlas into seperate images [duplicate]
Possible Duplicate:
How to decompose sprite sheet
I'm doing a port of an existing game and the designer no longer has all of the original art; he only has the resulting texture atlases he ...
0
votes
1answer
175 views
Image loaded from TGA texture isn't displayed correctly
I have a TGA texture containing this image:
The texture is 256x256.
So I'm trying to load it and map it to a cube:
#import <OpenGL/OpenGL.h>
#import <GLUT/GLUT.h>
#import ...
2
votes
1answer
131 views
XNA running slow when making a texture
I'm using XNA to test an image analysis algorithm for a robot. I made a simple 3D world that has a grass, a robot, and white lines (that are represent the course). The image analysis algorithm is a ...
1
vote
1answer
109 views
fragment shader with SNORM textures
I want to apply SNORM texture by using GL_TEXTURE_3D as a target, what will be the fragment shader for the same?
Also, what should be the data type of texture data?
0
votes
0answers
23 views
Unexpected behaviour with glFramebufferTexture1D
I am using render to texture concept with glFramebufferTexture1D. I am drawing a cube on non-default FBO with all the vertices as -1,1 (maximum) in X Y Z direction. Now i am setting viewport to X ...
1
vote
2answers
160 views
How to shade a texture two different colors?
To give an example of what I'm asking about, I'll use Saints Row 3 since I've been playing that lately. In that game you can customize your looks and your car's appearance a lot. Your coat can have ...
2
votes
2answers
424 views
Blending textures together, texture fade over / fade in
What is the best way to render a texture overlapping effect?
Like in this example:
I want either the grass to fade in to the snow texture, or the other way around. No rough edges. Somehow make ...
0
votes
1answer
132 views
UV Mapping in Autodesk Maya 2011 goes wrong
I'm always struggling with UV mapping, I'm still a student though. When I am creating a UV map the texture on the object always seems to be very low resolution... does anybody know a very good ...
2
votes
2answers
400 views
OpenGL : sluggish performance in extracting texture from GPU
I'm currently working on an algorithm which creates a texture within a render buffer. The operations are pretty complex, but for the GPU this is a simple task, done very quickly.
The problem is that, ...
1
vote
1answer
130 views
XNA shield effect with a Primative sphere problem
I'm having issue with a shield effect i'm trying to develop. I want to do a shield effect that surrounds part of a model like this: http://i.imgur.com/jPvrf.png
I currently got this:
...
0
votes
1answer
93 views
OpenGL : Keeping alpha in a render buffer
In my current task, i need to render a texture into a render buffer, in order to work on it (apply special filters) there. The result is then considered a "new texture", which is later displayed.
...
3
votes
0answers
191 views
Suitability of ground fog using layered alpha quads?
A layered approach would use a series of massive alpha-textured quads arranged parallel to the ground, intersecting all intervening terrain geometry, to provide the illusion of ground fog quite ...
1
vote
1answer
196 views
how to use a mask texture?
A texture pack for a sponza model contains mask textures (black and white). I guess that I should read only a red channel from that texture, right ? I use deferred rendering and for shading ...
1
vote
2answers
130 views
Texturize a shape of multiple triangles in 2D
This is an example of a shape consisting of multiple points, triangles and eventually a shape:
Red Dots = Vector3 (X, Y, Z) or Vector2 (X, Y)
If I have a Texture of a certain size, how do I ...
1
vote
1answer
142 views
Confusion on HLSL Samplers. Can I Set Samplers Inside Functions?
I'm trying to create a system where I can instance a quad to the screen, however I've run into a problem. Like I said, I'm trying to instance the quad, so I'm trying to use the same geometry several ...
1
vote
2answers
1k views
Unity Android: Truecolor texture performance hit and alternatives for truecolor
After integrating the graphics assets to my application, I noticed that when the textures are compressed they look very bad compared to truecolor. This happens to all the textures and it did not seem ...
0
votes
1answer
175 views
Rendering two textures with blending and alpha test
What I am looking for is the following: I have a circle on a square image, alpha is 0 at the corners
and also a square shadow, alpha is 0 everywhere else
I would like to have as final result a ...
1
vote
0answers
119 views
loading a heightmap as texture in shader
I have a height map of 256x256, containing, foreach cell, not only height as a normal float value ( not 0-1 ) and also 2 gradient values ( for X and Y ), also as normal float values ( not 0-1 ).
I ...
