Position relative to what?

[jorgeas80]

Hello,

In HPL1Engine, every 3D entity has a defined position (X, Y, Z). My question is: relative to what? Other way: How is the coordinate system defined? If an object is at (0, 0, 0), where is it? Is there a "world" element that defines a coordinate system?

Sorry for the basic question. I don't have experience with 3D programming and videogames. I need to transform the coordinates of the light objects of the game to another coordinate system, and logging their values, I see negative numbers. I don't know what they mean, or how the coordinate system is built