//This context uses raycasts to determine if a ledge is present.
//The raycasts originate from above and to the left/right of the character, and are casted downwards
public void UpdateWithCollisions()
{
RaycastHit rightHit;
RaycastHit leftHit;
bool rightHasHit = false;
bool leftHasHit = false;
m_HasHitEdge = false;
Vector3 upCenter = m_CapsuleCollider.GetUpCenter();
Vector3 upDirection = m_CapsuleCollider.GetUpDirection();
Vector3 transformRight = m_CapsuleCollider.transform.right;
//Orient against wall to the side, even if not able to wallsliding
//This allows the character to grab onto ledges on slanted walls
CSideCastInfo sideInfo = m_CapsuleCollider.GetSideCastInfo();
if (sideInfo.m_HasHitSide)
{
Vector3 sideNormal = sideInfo.GetSideNormal();
Vector3 sidePoint = sideInfo.GetSidePoint();
Vector3 sideUp = CState.GetDirectionAlongNormal(Vector3.up, sideNormal);
RaycastHit properSideHit;
if (Physics.Raycast(sidePoint + sideNormal * 0.2f + sideUp * 0.05f, -sideNormal, out properSideHit, 0.3f, m_CapsuleCollider.GetLayerMask()))
{
Vector3 newPoint = properSideHit.point;
Vector3 newNormal = properSideHit.normal;
Vector3 newUp = CState.GetDirectionAlongNormal(Vector3.up, newNormal);
Vector3 pivot = upCenter - newPoint;
Quaternion rotation = Quaternion.FromToRotation(upDirection, newUp);
Vector3 newUpCenter = newPoint + rotation * pivot;
CapsuleTransform transform = m_CapsuleCollider.GetCapsuleTransformCopy();
transform.SetUpDirection(newUp);
transform.SetUpCenter(newUpCenter);
upCenter = newUpCenter;
upDirection = newUp;
transformRight = transform.GetRightDirection();
}
}
//Determine the starting positions of the raycasts
Vector3 centerStart = upCenter + upDirection * (m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeCastVerticalMargin());
Vector3 sideOffSet = transformRight * (m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeCastHorizontalDistance());
Vector3 grabLength = -upDirection * (m_CapsuleCollider.GetEdgeCastVerticalDistance() + m_CapsuleCollider.GetEdgeCastVerticalMargin());
//The raycasts originate from above and to the left/right of the character, and are casted downwards
//The angle of the slope they hit can't be too steep, or the character will slide off.
if (Physics.Raycast(centerStart + sideOffSet, -upDirection, out rightHit, grabLength.magnitude, m_CapsuleCollider.GetLayerMask()))
{
if (Vector3.Angle(rightHit.normal, upDirection) < m_CapsuleCollider.GetMaxGrabAngle())
{
rightHasHit = true;
}
}
if (Physics.Raycast(centerStart - sideOffSet, -upDirection, out leftHit, grabLength.magnitude, m_CapsuleCollider.GetLayerMask()))
{
if (Vector3.Angle(leftHit.normal, upDirection) < m_CapsuleCollider.GetMaxGrabAngle())
{
leftHasHit = true;
}
}
if (rightHasHit || leftHasHit)
{
RaycastHit castToUse;
Vector3 wallProbeDirection;
if (rightHasHit && leftHasHit)
{
if (leftHit.distance < rightHit.distance)
{
castToUse = leftHit;
wallProbeDirection = -transformRight;
}
else
{
castToUse = rightHit;
wallProbeDirection = transformRight;
}
}
else if (rightHasHit)
{
castToUse = rightHit;
wallProbeDirection = transformRight;
}
else
{
castToUse = leftHit;
wallProbeDirection = -transformRight;
}
//Check if the character can even hold on. The distance between the character and the start of the raycastpoint should not be blocked by a collider (no grabbing on ledges on the other side of walls
if (Physics.Raycast(centerStart, wallProbeDirection, m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeCastHorizontalDistance(), m_CapsuleCollider.GetLayerMask()))
{
return;
}
wallProbeDirection = CState.GetDirectionAlongNormal(wallProbeDirection, castToUse.normal);
//After detecting that collider can hang onto edge, orient properly against surface
RaycastHit probeHit;
Vector3 probedNormal = CState.GetDirectionAlongNormal(-wallProbeDirection, Vector3.up);
if (Physics.Raycast(upCenter, wallProbeDirection, out probeHit, m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeAlignProbeDistance(), m_CapsuleCollider.GetLayerMask()))
{
float angle = Vector3.Angle(probeHit.normal, Vector3.up);
if (angle < m_CapsuleCollider.GetMaxEdgeAlignAngle())
{
probedNormal = probeHit.normal;
}
}
Vector3 newUpDirection = CState.GetDirectionAlongNormal(Vector3.up, probedNormal);
Vector3 headPoint = castToUse.point + probedNormal * (m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeCastHorizontalDistance()) - newUpDirection * m_CapsuleCollider.GetRadius();
//Block check
//Check if something is obstructing the proposed headposition (and fix if so)
RaycastHit blockHit;
if (Physics.Raycast(headPoint, -probedNormal, out blockHit, m_CapsuleCollider.GetRadius(), m_CapsuleCollider.GetLayerMask()))
{
if (blockHit.distance < m_CapsuleCollider.GetRadius())
{
Vector3 alongNormal = -CState.GetDirectionAlongNormal(wallProbeDirection, castToUse.normal);
castToUse.point += alongNormal * (m_CapsuleCollider.GetRadius() - blockHit.distance) / Vector3.Dot(alongNormal, blockHit.normal);
headPoint = castToUse.point + probedNormal * (m_CapsuleCollider.GetRadius() + m_CapsuleCollider.GetEdgeCastHorizontalDistance()) - newUpDirection * m_CapsuleCollider.GetRadius();
}
}
//Rotation check, check if character is aligned to wall or dangling
//then check if that rotation can be achieved
CapsuleTransform copy = m_CapsuleCollider.GetCapsuleTransformCopy();
copy.SetUpCenter(headPoint);
if (Vector3.Angle(Vector3.up, probedNormal) > m_CapsuleCollider.GetMaxWallAngle() || Vector3.Angle(Vector3.up, probedNormal) < m_CapsuleCollider.GetMaxGroundedAngle())
{
return;
}
if (copy.CanRotate(newUpDirection, RotateMethod.FromTop))
{
m_EdgePoint = castToUse.point;
m_EdgeNormal = castToUse.normal;
m_EdgeTransform = castToUse.transform;
m_WallNormal = probedNormal;
m_UpDirection = newUpDirection;
m_ProposedHeadPosition = headPoint;
m_HasHitEdge = true;
}
}
}