AncaA's tech journal

Some very useful tutorials and demos that I’ve found about implementing OpenGL:

Nehe Tutorials
Zeus Tutorials
Public API Implementations
OpenGL ES Implementations
Glut
Glut ES
GlUT Windows Libraries
GLUT on Windows

Today I wanted to test a little how the hardware acceleration is working in rendering 3D OpenGl ES applications on the Nokia N95. In order to do this I downloaded a sample 3D engine from the Nokia website.In order to run it on the emulator, I used Carbide VS 2005. The steps I followed were:
1. [...]

As seen until now after finished with the basics of building a 3D application on the Windows Mobile platform, I started to notice the advantages and disadvantages on using OpenGL Es on Windows Mobile. The available free implementations of OpenGL ES that I could find for Windows Mobile were only SW implementations and made [...]

For the PDF version click here.Soon I will add also the source code for the application I developed and give some hints about usefull tutorials!

Due to the fact that OpenGL ES does not provide any kind of fonts, we need think a way to create the characters and display them efficiently. In order to use fonts in OpenGL ES, we will use a widely used technique called: bitmapped fonts. That is, we store into a texture all characters of [...]

In order to load a texture we will use the following function : bool LoadTexture(const char *fileName, GLuint *id)This function will receive a texture filename and a pointer to a texture identifier. This identifier will be initialized from inside the function (if proceed). It will return true if the [...]

In the followings a simple Obj File Loader using OpenGL ES will be described. For that, I used a structure to describe the mesh object:typedef struct _ObjMesh { ObjVertex *m_aVertexArray; ObjNormal *m_aNormalArray; ObjTexCoord *m_aTexCoordArray; ObjFace *m_aFaces;
unsigned long int *m_aIndices; unsigned long int m_iNumberOfVertices,
[...]

The OBJ file format is a text file format, which means you can edit OBJ files in a text editor if you are hard-core. Unfortunately, the original specification didn’t seem to state what the end of line character should be, so some tools use carriage-returns and some use linefeeds. You may have to convert the [...]

 I loaded the tree using a mesh from a file and used OpenGL to render it. Soon I will put also some code samples used for loading the file and using OpenGL Es. Also I will add some performance statistics related to the execution of a 3D application using OpenGL.

In order to start the development of an Open GL ES application for the Pocket PC we will need the following:
1.An OpenGL ES implementation(Vincent Mobile 3D Rendering Library,Hybrid’s “Rasteroid” Implementation etc.) 2.Visual Studio 2005 Standard Edition(at least) as it contains the emulator and template projects for mobile development. 3.Pocket PC 2003 SDK.
In the following I [...]