/// <summary>
/// handles adjusting deltaMovement if we are going up a slope.
/// </summary>
/// <returns><c>true</c>, if horizontal slope was handled, <c>false</c> otherwise.</returns>
/// <param name="deltaMovement">Delta movement.</param>
/// <param name="angle">Angle.</param>
bool handleHorizontalSlope(ref FixVec3 deltaMovement, Fix angle)
{
// disregard 90 degree angles (walls)
if (FixMath.Round(angle) == 90)
{
return(false);
}
if (angle < slopeLimit)
{
}
else // too steep. get out of here
{
deltaMovement.x = Fix.zero;
}
return(true);
}
/// <summary>
/// handles adjusting deltaMovement if we are going up a slope.
/// </summary>
/// <returns><c>true</c>, if horizontal slope was handled, <c>false</c> otherwise.</returns>
/// <param name="deltaMovement">Delta movement.</param>
/// <param name="angle">Angle.</param>
bool handleHorizontalSlope(ref FixVec2 deltaMovement, Fix angle)
{
// disregard 90 degree angles (walls)
if (FixMath.Round(angle) == 90)
{
return(false);
}
if (angle < slopeLimit)
{
// we only need to adjust the deltaMovement if we are not jumping
// TODO: this uses a magic number which isn't ideal! The alternative is to have the user pass in if there is a jump this frame
if (deltaMovement.y < jumpingThreshold)
{
// apply the slopeModifier to slow our movement up the slope
Fix slopeModifier = (Fix)slopeSpeedMultiplier.Evaluate((float)angle);
deltaMovement.x *= slopeModifier;
// we dont set collisions on the sides for this since a slope is not technically a side collision.
// smooth y movement when we climb. we make the y movement equivalent to the actual y location that corresponds
// to our new x location using our good friend Pythagoras
deltaMovement.y = FixMath.Abs(FixMath.Tan(angle * FixMath.Deg2Rad) * deltaMovement.x);
var isGoingRight = deltaMovement.x > 0;
// safety check. we fire a ray in the direction of movement just in case the diagonal we calculated above ends up
// going through a wall. if the ray hits, we back off the horizontal movement to stay in bounds.
var ray = isGoingRight ? _raycastOrigins.bottomRight : _raycastOrigins.bottomLeft;
TFRaycastHit2D raycastHit;
if (collisionState.wasGroundedLastFrame)
{
raycastHit = TFPhysics.Raycast((FixVec2)ray, (FixVec2)deltaMovement.Normalized(), deltaMovement.GetMagnitude(), platformMask);
}
else
{
raycastHit = TFPhysics.Raycast((FixVec2)ray, (FixVec2)deltaMovement.Normalized(), deltaMovement.GetMagnitude(), platformMask & ~oneWayPlatformMask);
}
if (raycastHit)
{
// we crossed an edge when using Pythagoras calculation, so we set the actual delta movement to the ray hit location
deltaMovement = raycastHit.point - ray;
if (isGoingRight)
{
deltaMovement.x -= _skinWidth;
}
else
{
deltaMovement.x += _skinWidth;
}
}
_isGoingUpSlope = true;
collisionState.below = true;
collisionState.slopeAngle = -angle;
}
}
else // too steep. get out of here
{
deltaMovement.x = Fix.zero;
}
return(true);
}