Movement: Difference between revisions

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Movement is one of the core aspects of Teeworlds and DDrace.

== Basics ==

=== Gravity ===

Every tick the acceleration of 0.5 is added to the y velocity (downwards) due to gravity.

=== Jumping ===

Ground jumping sets a tee's y velocity to -13.2, scaled by a value.

Jumping will ''set'' the y velocity, cancelling out any previous upwards or downwards velocity. This is very useful in scenarios where you need to halt large vertical impulses.

{{Todo|Find the bps value or scaled coefficient for these values (same with the horizontal movement, these values are not in bps)}}

=== Horizontal Movement: ===

* Pressing nothing:

** Ground: Every tick <syntaxhighlight lang="c++" inline="">velocity.x = velocity.x * 0.5</syntaxhighlight>

Friction is ignored when holding down a key. So, at high velocities, pressing nothing will slow a tee down faster than moving in the opposite direction, as the friction will have an exponential slowdown compared to the <code>a/d</code> linear slowdown.

== Advanced ==

=== Max Speed ===

Max speed: 6000 Sub-tiles/Tick (+speedup in one tick, e.g. gravity, jetpack, explosion).

The speed is rounded down to a precision of <math>\frac{1}{256}</math> every tick. This is causing the tee to stop moving horizontal when having too much speed.

{{Todo|* convert sub-tiles/tick into tiles/sec * find max vel und real max vel (from where would a constant function fit) * find speed, where the tee stops moving * write about ramp speed, and add diagram}}

=== Corner Skimming ===

A tee is considered on the ground only due to its position and distance to the ground - it does not require the tee to have downwards velocity. So, it is possible for a tee to be "grounded" while traveling upwards, as long as the tee skims the corner of a tile.  

Corner skimming is not often intentionally used in map parts (except for maps such as [https://ddnet.org/maps/Short-32-And-32-Precise-32-7/ Short and Precise 7]), but can be used in short speedruns as small optimizations.

{{Todo|add gif}}

=== Elevated Jump ===

A ground jump can be performed even if the tee is a few subunits above the ground.  

[[Category:Game-Mechanic]]