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# germangb

Member Since 17 Aug 2012
Offline Last Active Mar 06 2014 08:31 AM

### VBOs and transformation matrices

24 November 2013 - 12:05 PM

Hello, I have been reading about the topic of VBOs and how they will benefit my rendering. But I don't understand how you can use the typical transformation matrices to transform data that is held in a VBO.

For example, let's say I have a VBO storing all the geometry of my scene, including a cube that rotates/moves independently from the rest of the geometry.

I want to render the geometry held in the VBO but I also want to apply a transformation to the cube that is inside.

What's a good approach to do that? Do I apply the transformation to the vertices and then put the vertex information of the cube with the transformation applied, updating the VBO in every single frame?

I'd want to be able to apply the transformation with a vertex shader, but I don't see the way to do that.

thanks.

### Who's this woman?

31 July 2013 - 12:27 AM

This might be a silly question, but I've seen her in many graphics programming articles and I'm keen on using its 3d model...

thanks

### alpha maps?

17 February 2013 - 11:30 AM

Hello, I have this mesh:

and I was wondering how to draw a path so that the plane would look like this (with smooth borders):

What I have been able to do so far is this.

and as you can see, it's such a fail. I don't know what to do to make it smooth.

### how can I archieve this?

13 February 2013 - 12:03 PM

people in the GTA Chinatown Wars game look like 2d sprites but they are 3d models, here are some screenshots of the game:

I believe this kind of models can be archieved by defining the models with 3d points intead of polygons, and then render a tiny square for each point in the 3d scene.

Any ideas?

### texture issue

12 December 2012 - 04:19 PM

I have two 2D textured quads that always face me:

It looks ok, but when I watch the 2 quads from another point I have the following problem:

any idea?

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