OpenTK is a C# library that wraps OpenGL, OpenCL and OpenAL.
0
votes
1answer
40 views
Normals not rotated correctly
While rendering a cube to the gbuffer (diffuse, normal, depth) I noticed something odd when applying rotations. I build a world matrix for the cube as follows:
Yaw = Yaw % MathUtil.PI2;
Pitch = Pitch ...
1
vote
2answers
162 views
c# opentk - converting screen coords to world coords
I'm making a windows forms application with opengl view. I need to get the mouse coords converted to the opengl world coords. Well, my Y coord gets converted wrong. It's hard to explain, so here is ...
-2
votes
1answer
140 views
Texturing using PBO in OpenTK (OpenGL) [closed]
I'm learning OpenTK (OpenGL) and am trying to generate texture using PBO in OpenTK. However,
my code does not work. I have read lots of examples and tutorials online:
for example Map and fill texture ...
0
votes
0answers
111 views
Using OpenGL3.3 and GLSL, texturing is not working [closed]
I am having troubles getting texturing working in my OpenTK/OpenGL 3.3 code. I am sure it is something simple that I am missing, but I just can't seem to get a texture on the square I am rendering. ...
4
votes
1answer
94 views
What OpenCL video cards (or FPGAs) features are needed for high speed multiplication?
I'm benchmarking some cryptographic related software and am looking for video cards that are better at parallel multiplication vs parallel addition.
Is there any prior work that would graph video ...
-1
votes
1answer
260 views
Problem rendering VBO [closed]
I'm developing a game engine using OpenTK. I'm trying to get to grips with the use of VBO's. I've run into some trouble because somehow it doesn't render correctly.
Thus far I've used immediate mode ...
1
vote
2answers
126 views
Point[] and Tri not “could not be found”
Hi I'm trying to learn how to load a .obj file using OpenTK in windows Forms. I have seen a lot of examples out there, but I do see almost everyone uses List, and Point[]. Code example show these ...
1
vote
2answers
590 views
Is OpenTK Dead?
Looking at OpenTK, I notice some disturbing signs:
The last news item was posted on December 31st, 2010
The main forum gets about one post a day
On SourceForge, the last nightly build was in March, ...
0
votes
2answers
312 views
OpenTK 2D Engine [closed]
I'm looking for a 2D gaming engine for C#/Windows. OpenTK seems reasonable, albeit made for 3D. I didn't find anything (other than an old thread from 2008) that talks about a 2D game engine.
Are ...
1
vote
0answers
151 views
Does OpenTK work in Windows 8?
While looking up OpenTK, I found a couple of references to threads that talk about Windows 8 support:
This one from 2011 claims that OpenTK works on a Win8 preview
A newer one from 2012 leaves the ...
1
vote
2answers
199 views
I enabled and setup glBlendFunc, but my texture has a white outline. What am I doing wrong?
You can see most of my source code in this question: Instead of the specified Texture, black circles on a green background are getting rendered. Why?
Now I have the problem, that my texture has a ...
2
votes
2answers
142 views
Instead of the specified Texture, black circles on a green background are getting rendered. Why?
I'm trying to render a Texture via OpenGL. But instead of the texture black circles on a green background are rendered. (They scale, depending what the rotation of the texture is)
Example:
The ...
2
votes
1answer
134 views
Why do I have to divide the origin of a quad by 4 instead of 2?
I'm currently transitioning from C#/XNA to C#/OpenTK but I'm getting stuck at the basics.
So I have this Sprite-Class:
public static bool EnableDebugDraw = true;
public float X;
public float Y;
...
0
votes
4answers
308 views
Missing triangles in model
I am having an issue where triangles in a model aren't being shown.
The left is wireframe, the right is the finished image. For some reason a bunch of the triangles aren't being shown.
The project ...
1
vote
1answer
159 views
OpenAL seems to ignore sound attentuation/orientation for long sounds
I don't know how else to describe it in the title, sorry.
My sound engine currently works perfectly with listener positioning and sound positioning to create the attentuation and panning effects. At ...
2
votes
3answers
1k views
C# 2D Game Library?
I'm looking for a C# 2D game library based on something like OpenTK which wraps OpenGL for C#
Basically something like Slick2D (2D game library for Java) which is based on LWJGL which is an OpenGL ...
0
votes
2answers
521 views
Can't render to FBO using a shader
I've added functionality so that I can render to a framebuffer (for post-processing and stuff). I can successfully render to my framebuffer and then render that framebuffer, but anything with a ...
1
vote
1answer
431 views
C# OpenTK - Getting world coordinates of points that are altered by matrices
I have written a skeletal animation system for a game i am working on. To draw lines that represent a skeleton, i use the GL matrix, and multiply it by each bone a long the body. For example before ...
1
vote
1answer
896 views
Why doesn't my texture display with this GLSL shader?
I am trying to display a DXT1 compressed texture on a quad using a VBO and shaders, but I have been unable to get it working. All I get is a black square.
I know my texture is uploaded properly ...
1
vote
0answers
160 views
Input in OpenTK
How to use Input in OpenTK 1.0? There is not much info around, some classes are unfinished.
What I want to achieve, is to be able to use input not only in OnUpdate function, but also in other classes ...
11
votes
3answers
3k views
How do I implement a quaternion based camera?
UPDATE The error here was a pretty simple one. I have missed a radian to degrees conversion. No need to read the whole thing if you have some other problem.
I looked at several tutorials about this ...
0
votes
2answers
554 views
Using multiple indexes with buffer objects in OpenTK
I've got multiple buffers in OpenGL holding data on position, normals and texcoords.
I also have an equal number of buffers holding distinct index data for each of those buffers.
I quite like this ...
2
votes
2answers
175 views
Collisions between players at spawnpoints
I am working on a FPS/MMORPG and ran into a problem at spawnpoints, when I enabled collision detection between players. Neither player would be able to move if both spawned at the same time, because ...
6
votes
2answers
1k views
How do I draw anti-aliased holes in a bitmap
I have an artillery game (hobby-learning project) and when the projectile hits it leaves a hole in the ground. I want this hole to have antialiased edges. I'm using System.Drawing for this. I've tried ...
4
votes
1answer
617 views
In an artillery game how do I mask out the part of the terrain that was hit
Let's say I want to make a really simple artillery game, something like Gorillas. I don't have any experience in games, just some basic understanding of OpenGL. I want to do this for fun and to learn ...
