Overhaul the Platformer Physics System #20

Merged

kirsle merged 0 commits from physics into master

2020-04-04 21:08:27 -07:00

kirsle commented

2020-04-04 21:01:21 -07:00

(Migrated from git.kirsle.net)

Player character now experiences acceleration and friction when
walking around the map!
Actor position and movement had to be converted from int's
(render.Point) to float64's to support fine-grained acceleration
steps.
Added "physics" package and physics.Vector to be a float64 counterpart
for render.Point. Vector is used for uix.Actor.Position() for the sake
of movement math. Vector is flattened back to a render.Point for
collision purposes, since the levels and hitboxes are pixel-bound.
Refactor the uix.Actor to no longer extend the doodads.Drawing (so it
can have a Position that's a Vector instead of a Point). This broke
some code that expected .Doodad to directly reference the
Drawing.Doodad: now you had to refer to it as a.Drawing.Doodad which
was ugly. Added convenience method .Doodad() for a shortcut.
Moved functions like GetBoundingRect() from doodads package to
collision, where it uses its own slimmer Actor interface for just the
relevant methods it needs.

* Player character now experiences acceleration and friction when walking around the map! * Actor position and movement had to be converted from int's (render.Point) to float64's to support fine-grained acceleration steps. * Added "physics" package and physics.Vector to be a float64 counterpart for render.Point. Vector is used for uix.Actor.Position() for the sake of movement math. Vector is flattened back to a render.Point for collision purposes, since the levels and hitboxes are pixel-bound. * Refactor the uix.Actor to no longer extend the doodads.Drawing (so it can have a Position that's a Vector instead of a Point). This broke some code that expected `.Doodad` to directly reference the Drawing.Doodad: now you had to refer to it as `a.Drawing.Doodad` which was ugly. Added convenience method .Doodad() for a shortcut. * Moved functions like GetBoundingRect() from doodads package to collision, where it uses its own slimmer Actor interface for just the relevant methods it needs.