Game Development Reference
In-Depth Information
For more information of each parameter, go to the following link:
ht-
The
Negative Button
and
Positive Button
here will send the negative and positive value,
which in most cases is used to control directions such as, left, right, up, and down. There
is a
Dead
parameter, which will set any number that is lower than this parameter to
0
,
which is very useful when we use a joystick.
Also, setting
Type
to
Key or Mouse Button
and enabling the
Snap
parameter will reset
axis values to zero after it receives opposite inputs.
Physics2D.Raycast
If we take a look at the
Grounded()
function and check out the following highlighted
code, we will see that we have cast the ray a bit longer than the sprite collider:
if (Physics2D.Raycast (origin, hitDirection, distance,
layerMask.value)) {
_isGrounded = true;
} else if (Physics2D.Raycast (rightOrigin, hitDirection,
distance, layerMask.value)) {
_isGrounded = true;
} else if (Physics2D.Raycast (leftOrigin, hitDirection,
distance, layerMask.value)) {
_isGrounded = true;
}
From the highlighted code, we draw
Raycast
from the middle of our character down-
ward by
0.58
units. Why don't we set it to
0.5
? We set it this way to make our character
stay on the edge of the floor surface. If we set it to
0.5
, we will see that the character will
not hit the ground. This is because of the way
Box Collider 2D
and
Polygon Collider 2D
detect other collider objects in Unity, as we can see in the following screenshot:
