Bounding Boxes

[ch4perone]

• Give Objects defined bounding boxes.
• Implement AABB class.
• Think about it.

AABB class is requested to fulfill accessibility requirements.

• the upper and lower bounds (corner points) needs to be publicly accessible
• there needs to be a function or at least efficient way to compute the volume of the box
• the dimension x,y,z in terms of size needs to be accessible, tighs into the point above. If accessible aabb.size.x(), y and z the volume is obvious.
• please think about whether it makes sense to have AABB * as pointer or class internal object AABB. I tend towards the last, but I don't know if that is feasible .. haven't given it much thought yet
• please try this out by implementing getBoundingBox() in Object.h/cpp and auto construct Object with/without bounding box according to parameter set up (see main: bool GRID_ACCELERATION)
• as said excessively play around with it, if AABB * as point, AABB must be destructed when Object is deleted. However we don't reallyy delete our objects (hmm bad-ish) think about it

[ferbsx]

• make a public function called upper which returns the pos with the higher x,y,z values (lower returns the other pos2)
• upper should round up (+ eps)
• lower should round down (- eps)
• Sphere
• Cylinder
• triangle
• size returns the length of the sides, so size.x = upper().x - lower().x
• AABB * bound = null pointer
• get boundingbox function in all objects to return the AABB (look at grid acceleration for an example)

[ferbsx]

• fix the bug with the shading of the box (calculating of the normal)