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pabloreda

Member Since 26 Nov 2006
Offline Last Active Jun 08 2015 05:35 AM

Topics I've Started

Calc octree order in camera space

13 January 2015 - 03:17 AM

Hi, I have a problem:

 

I have a 8 vertex cube in camera space, center is the camera origin viewing to z positive and I need calculate the octree order.

now I search the vertex with less distante to camera (0,0,0) but is expensive.

 

In the literature, always use object space, center in cube, and is easy calculate comparing the cube center and the camera position.

lhttp://www.flipcode.com/harmless/issue02.htm

 

I try operate about matrix transformation but is expensive too. if invert the matrix and transform the negate center of cube, I get the numbers for comparing like the link, but, transform a vertex is expensive too.

 

my question is

 

I need calculate the octree order but in camera space, it can be done more fast?

 

Thank's in advance


Efficient synthetic image generation of arbitrary 3-d objects

04 September 2012 - 11:30 AM

Anyone have this paper?

http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5070707

Say the same of Euclideon guys!!

Experiment in representation of 3D objects

02 September 2012 - 09:08 AM

Experiment in representation of 3D objects

Testing alternatives to the representation of 3D objects found a different way to vectors, points and voxels.
At first the idea seems too simple and restrictive, but let's see what happens.

The basic idea is to use 6 images, one for each side of the cube, and save these images point height.

The current implementation uses 3 256x256 images saved at each point (4 bytes), the minimum, maximum and there is room for two separate colors (palette).

The test did not make sense because the bitmap go to locate the points is what I'm trying to avoid but I wanted to see how it looks.
I lack the rasterization implement this structure or the intersection of a ray in order to draw solid.
I can calculate the normal using adjacent points although not sure that's a good idea.
The bitmaps are uncompressed, I want to finish the ray tracer first, maybe the search to locate the point on the screen resulting in any way to compress this point.

Any idea or help are welcome !!

all the source is open in my site.

New lang for make Video Games

26 November 2006 - 10:27 AM

Hi I develop a new Languaje for make video games, is Open Source. Please try and write me if you like. You can download in www.reda4.org thanks Pablo

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