Java
Loading a Shader in OpenGL
In this tutorial, we will discuss how to load a shader in OpenGL. (more…)
Java
Basic LWJGL Setup and Game Loop
In order to get up and running with OpenGL and LWJGL, one need to understand the most basic setup of LWJGL. This is important to understand because all following examples will be based on that. (more…)
Dies Und Das
That’s why we are in Bronze League – StarCraft Song
As a geeky StarCraft II fan boy, I thought I'd give it a try to thrum my own little StarCraft song. This idea is not exactly new, there are quite a number of StarCraft songs around. Some of these songs are pure awesomeness, some of them make me wonder if they are disturbingly meant serious or not. In any case, StarCraft songs are en vogue and a nice prove of creativity amongst nerdy gamers. (more…)
Dies Und Das
Camera Transformation and View Matrix
In the previous article we learned about spaces and how to position and orient objects in world space by applying transformation matrices on them. We also learned about camera space, that is simply another coordinate system within the world space. (more…)
OpenGL
Projection Matrix
In the previous article, we discussed the camera transformation which maps a vertex from world space into the camera space. Recall that the camera spans a orthonormal coordinate system with the three vectors \(\vec{u}\), \(\vec{v}\) and \(\vec{w}\), where \(-\vec{w}\) points along the viewing direction. In this section we will deal with the projection of the 3D vertex in camera space into a 2D view plane. In OpenGL, what follows is clipping and mapping to so-called normalized device coordinates which are tightly coupled into the construction of projection matrix. In fact, the pure mathematical construction of the projection matrix is easy. What makes it difficult is the clipping part. (more…)
Java
Simple OpenGL Shader Example
This post provides a clean, up-to-date and concise example on how to set up a simple custom shader in OpenGL that runs out of the box. My target language is Java with LWJGL, but the code can easily be ported to different languages on this level. To my surprise, I is quite difficult to find a state of the art example of a simple yet complete setup for shaders that can serve as a get-go for more complex programs. Most OpenGL shader tutorials are written for the pre-2.0 era (ie. using shaders through ARB extensions) that is long over. This post is therefore trying to provide a modern "Hello World of Shaders" set up example. (more…)
OpenGL
Math Primer for 3D Graphics
In the following post I provide a simple-as-possible math primer to understand basic concepts necessary for 3D graphics. I do not put much emphasize on a formal notation, but rather on understandability and applicability for our case. That is why we always assume the Cartesian Coordinate System and specialize our definitions for three dimensions. (more…)
Java
For- und ForEach Schleifen in Java
In diesem post widme ich mich folgender Fragestellungen:
- Beispiele und Erklärung der For- und ForEach Schleife
- Was ist mit For bzw. ForEach Loop gemeint?
- Was sind Java Laufvariablen und wie benutze ich sie?
Java
Java Arrays
Dieser Artikel behandelt die folgenden Themen
- Java Arrays mit Beispielen
- Arrays in Java in mehreren Dimensionen
OpenGL
Introduction to 3D Graphics
We shall begin. Let me welcome you, fellow nerd! You are about to embark on a wonderful journey full of geekiness and technical awesomeness. Computer graphics, especially 3D graphics is the pinnacle of nerdcraft. It has been fascinating gamers, artists and developers since the first photon has been shot on a screen. Together with game development, 3D computer graphics belongs to the most challenging parts of computer science, as it involves a lot of math, a deep understanding of underlying hardware, meticulous and efficient programming and a sense for beauty. (more…)