Category Archives: Graphics

Graphics

Some things to remember when you make an interview

Posted on 12 octubre 2011 by Alvaro Martin

Dot product is a value expressing the angular relationship between two vectors Cross product is an operation on two vectors. The cross product of two vectors produces a third vector which is perpendicular to the plane in which the first … Continue reading →

Posted in Game Industry, Graphics, Programming | Leave a comment

Efficient Sparse Voxel Octrees

Posted on 14 junio 2010 by Alvaro Martin

Hace ya años que se lleva experimentando con el uso de voxels, sobre todo para renderizar contenidos líquidos, donde el voxel es el rey. ZBrush es con voxels, iD tech 5 no, pero anunciaron que tienen ya avanzado el uso … Continue reading →

Posted in Graphics, Programming, Video Games | Leave a comment

Obj-C FPS counter and dt time for iPhone

Posted on 8 abril 2010 by Alvaro Martin

// FPS static CFTimeInterval lastTime = CFAbsoluteTimeGetCurrent(); CFTimeInterval beginTime = CFAbsoluteTimeGetCurrent(); CFTimeInterval dt = beginTime – lastTime; static uint FPS = 0; static CFTimeInterval accum = 0; if ( accum >= 1.0 ) { NSLog(@”%d”, FPS); accum = 0.0; FPS … Continue reading →

Posted in Graphics, iPad, iPhone, iPod, Programming | Leave a comment

OpenGL 3.3 & 4.0

Posted on 28 marzo 2010 by Alvaro Martin

El grupo Khronos y el OpenGL ARB han publicado en el GDC 2010 de San Francisco las especificaciones de OpenGL 3.3 , GLSL 3.3, OpenGL 4.0 and GLSL 4.0. ¿Por qué 2 specs al mismo tiempo? OpenGL 3.3 puede ser desarrollada con las … Continue reading →

Posted in Graphics, Hardware, Programming | Leave a comment

ModelViewer, Deferred Rendering pipeline

Posted on 5 noviembre 2009 by Alvaro Martin

Ups, I have no uploaded this video… No Siesta Studios Viewer with a demo model big dady 2. It video show my Deferred Rendering pipeline. Video:- Only Diffuse map- Normal Mapping- Deferred Rendering: Geometry Stage; albedo, normals, SSAO and specular … Continue reading →

Posted in Graphics, Programming, Video Games | Leave a comment

Aspect Ratio and Context Menu

Posted on 12 septiembre 2009 by Alvaro Martin

Hi there! now I have assigned 1.3 aspect ratio and created context menu for to select easily between effects. Shortcut is available with function keys too, F1-F10. This is the end of the first lite version using glut. Is a … Continue reading →

Posted in Graphics, GUI, Programming | Tagged | 1 Comment

Deferred Rendering and Normal Mapping

Posted on 12 septiembre 2009 by Alvaro Martin

To do normal mapping in Deferred Rendering is little dificult because you need to store in G-buffer tangent and binormal if you want, but it is easy to calculate. Or you can calculate TBN matrix per pixel with your 2D … Continue reading →

Posted in Graphics, Programming | Tagged | Leave a comment

Specular RGB and Edge Detect AA

Posted on 8 septiembre 2009 by Alvaro Martin

Hi all! A little update of specular effect. Now with support of RGB channel. I have a screenshot with edge detect anti-aliasing: Look, blue in metal and red in crystal… painted by Prompt Blog this! Bookmark on Delicious Digg this … Continue reading →

Posted in Graphics, Programming | Tagged | 2 Comments

Adjusting SSAO

Posted on 8 septiembre 2009 by Alvaro Martin

I’m adjusting the params of my SSAO shaders. I’m trying to have more darkness in occlusion zones and more clean the others fragments. So adjusting selective fragments I have more performance. Blog this! Bookmark on Delicious Digg this post Recommend … Continue reading →

Posted in Graphics, Programming | Tagged | Leave a comment

Deferred Lighting + specular map – normal map

Posted on 7 septiembre 2009 by Alvaro Martin

Hi all! Today I’m testing new map, specular map in RGB (this is only white) with BigDady 2 model, see the crystal in the “face”: Well now, the rendering process in screenshots, read more! Blog this! Bookmark on Delicious Digg … Continue reading →

Posted in Graphics, Programming | Tagged | Leave a comment