/// <summary>
/// Handles camera collisions with environment
/// </summary>
/// <returns>False if no correct position was found</returns>
private void HandleIntersection(MyEntity controlledEntity)
{
Debug.Assert(controlledEntity != null);
MyEntity parentEntity = controlledEntity.GetTopMostParent() ?? controlledEntity;
// line from target to eye
LineD line = new LineD(m_target, m_position);
// oriented bb of the entity
MyOrientedBoundingBoxD safeObb = GetEntitySafeOBB(parentEntity);
// oriented bb of the entity + camera radius
MyOrientedBoundingBoxD safeObbWithCollisionExtents =
new MyOrientedBoundingBoxD(safeObb.Center, safeObb.HalfExtent + (controlledEntity.Parent == null ? 0.5 : 2.0) * CAMERA_RADIUS, safeObb.Orientation);
// start = target, end = eye
// find safe start...
LineD safeOBBLine = new LineD(line.From + line.Direction * 2 * safeObb.HalfExtent.Length(), line.From);
double? safeIntersection = safeObbWithCollisionExtents.Intersects(ref safeOBBLine);
Vector3D castStartSafe = safeIntersection != null ? (safeOBBLine.From + safeOBBLine.Direction * safeIntersection.Value) : m_target;
if (controlledEntity.Parent != null && safeIntersection != null)
{
HkShape hkSphere = new HkSphereShape(CAMERA_RADIUS * 2);
//var hitInfo = MyPhysics.CastRay(castStartSafe, m_target);
MatrixD shapeCastStart = MatrixD.CreateTranslation(castStartSafe);
var hitInfo = MyPhysics.CastShapeReturnContactBodyData(m_target, hkSphere, ref shapeCastStart, 0, 0);
MyEntity hitEntity = hitInfo.HasValue ? hitInfo.Value.HkHitInfo.GetHitEntity() as MyEntity : null;
MyEntity entity = controlledEntity;
var hitEntityWeldingGroup = hitEntity != null?MyWeldingGroups.Static.GetGroup(hitEntity) : null;
bool weldingGroupEquals = false;
while (entity != null && !weldingGroupEquals)
{
if (hitEntityWeldingGroup == MyWeldingGroups.Static.GetGroup(entity))
{
weldingGroupEquals = true;
}
entity = entity.Parent;
}
if (hitInfo.HasValue && hitEntityWeldingGroup != null && weldingGroupEquals)
{
castStartSafe = hitInfo.Value.Position + line.Direction;
}
else
{
safeObb = GetEntitySafeOBB(controlledEntity);
safeObbWithCollisionExtents = new MyOrientedBoundingBoxD(safeObb.Center, safeObb.HalfExtent + 0.5f * CAMERA_RADIUS, safeObb.Orientation);
safeIntersection = safeObbWithCollisionExtents.Intersects(ref safeOBBLine);
castStartSafe = safeIntersection != null ? (safeOBBLine.From + safeOBBLine.Direction * safeIntersection.Value) : m_target;
}
hkSphere.RemoveReference();
}
// raycast against occluders
Vector3D safePositionCandidate;
//double lastSafeMinimumDistance = m_safeMinimumDistance;
m_safeMinimumDistance = controlledEntity is MyCharacter ? 0 : (castStartSafe - m_target).Length(); // store current safe minimum dist
m_safeMinimumDistance = Math.Max(m_safeMinimumDistance, MIN_VIEWER_DISTANCE);
//if (lastSafeMinimumDistance + 30.0f < m_safeMinimumDistance)
//{
// castStartSafe = m_target + (castStartSafe - m_target) / m_safeMinimumDistance * lastSafeMinimumDistance;
// m_safeMinimumDistance = lastSafeMinimumDistance;
//}
Vector3D raycastOrigin = (controlledEntity is MyCharacter) ? m_target : castStartSafe;
MyCameraRaycastResult raycastResult = RaycastOccludingObjects(controlledEntity, ref raycastOrigin, ref m_position,
ref castStartSafe, out safePositionCandidate);
// visual debugging :)
if (m_debugDraw)
{
VRageRender.MyRenderProxy.DebugDrawOBB(safeObb, Color.Red, 0.1f, false, true);
VRageRender.MyRenderProxy.DebugDrawOBB(safeObbWithCollisionExtents, Color.Yellow, 0.0f, false, true);
VRageRender.MyRenderProxy.DebugDrawArrow3D(safeOBBLine.From, safeOBBLine.To, Color.White, Color.Purple,
false);
VRageRender.MyRenderProxy.DebugDrawArrow3D(safeOBBLine.From, castStartSafe, Color.White, Color.Red,
false);
VRageRender.MyRenderProxy.DebugDrawArrow3D(castStartSafe, m_position, Color.White, Color.Orange, false);
VRageRender.MyRenderProxy.DebugDrawSphere(castStartSafe, 0.2f, Color.Green, 1.0f, false, true);
}
switch (raycastResult)
{
case MyCameraRaycastResult.Ok:
case MyCameraRaycastResult.FoundOccluder:
m_positionCurrentIsSafe = true;
{
double distFromCandidateToTarget = (safePositionCandidate - m_target).Length();
if ((distFromCandidateToTarget > m_lastRaycastDist + CAMERA_RADIUS && distFromCandidateToTarget > m_safeMinimumDistance) ||
raycastResult == MyCameraRaycastResult.Ok)
{
// now we need it from the other side
double newDist = (safePositionCandidate - m_position).Length();
// new safe position is further from target => change over time (zoom out)
if (m_positionSafeZoomingOutTimeout <= 0)
{
float distDiffZoomSpeed = 1 -
MathHelper.Clamp((float)Math.Abs(m_lastRaycastDist - newDist), 0.0f,
1.0f - MyEngineConstants.UPDATE_STEP_SIZE_IN_SECONDS);
m_positionSafeZoomingOutSpeed += distDiffZoomSpeed;
m_positionSafeZoomingOutSpeed = MathHelper.Clamp(m_positionSafeZoomingOutSpeed, 0.0f,
1.0f);
Vector3D targetToPosSafe = m_positionSafe - m_target;
double lenTargetToPosSafe = targetToPosSafe.Length();
Vector3D rotatedPositionSafe = m_target +
Vector3D.Normalize(safePositionCandidate - m_target) *
lenTargetToPosSafe;
m_positionSafe = Vector3D.Lerp(rotatedPositionSafe, safePositionCandidate,
m_positionSafeZoomingOutSpeed);
}
else
{
m_positionSafeZoomingOutTimeout -= MyEngineConstants.UPDATE_STEP_SIZE_IN_MILLISECONDS;
Vector3D targetToPosSafe = m_positionSafe - m_target;
double lenTargetToPosSafe = targetToPosSafe.Length();
m_positionSafe = m_target + Vector3D.Normalize(safePositionCandidate - m_target) * lenTargetToPosSafe;
}
}
else
{
// new safe position is closer or closer than safe distance => instant change
m_positionSafeZoomingOutSpeed = 0.0f; // set zooming out speed to zero for next time
m_positionSafe = safePositionCandidate;
m_positionSafeZoomingOutTimeout = 0; // controlledEntity.Parent != null ? m_positionSafeZoomingOutDefaultTimeoutMs : 0;
m_disableSpringThisFrame = true;
}
}
break;
//case MyCameraRaycastResult.FoundOccluderNoSpace:
default:
m_positionSafeZoomingOutSpeed = 1.0f; // we're in first person, change instantly to third if possible
m_positionCurrentIsSafe = false;
break;
}
m_lastRaycastDist = (float)(m_positionSafe - m_position).Length();
if (m_debugDraw)
{
VRageRender.MyRenderProxy.DebugDrawSphere(m_positionSafe, 0.225f, Color.Purple, 1, false);
VRageRender.MyRenderProxy.DebugDrawSphere(safePositionCandidate, 0.2f, Color.Azure, 1, false);
}
}
/// <summary>
/// Handles camera collisions with environment
/// </summary>
/// <returns>False if no correct position was found</returns>
private bool HandleIntersection(MyEntity controlledEntity)
{
Debug.Assert(controlledEntity != null);
var parentEntity = controlledEntity.Parent ?? controlledEntity;
// line from target to eye
var line = new LineD(m_target, m_position);
// oriented bb of the entity
var safeObb = GetEntitySafeOBB(parentEntity);
// oriented bb of the entity + camera radius
var safeObbWithCollisionExtents = new MyOrientedBoundingBoxD(safeObb.Center, safeObb.HalfExtent + 0.5f * CAMERA_RADIUS, safeObb.Orientation);
// start = target, end = eye
// find safe start...
LineD safeOBBLine = new LineD(line.From + line.Direction * 2 * safeObb.HalfExtent.Length(), line.From);
double? safeIntersection = safeObbWithCollisionExtents.Intersects(ref safeOBBLine);
Vector3D castStartSafe = safeIntersection != null ? (safeOBBLine.From + safeOBBLine.Direction * safeIntersection.Value) : m_target; // here we go
// visual debugging :)
if (m_debugDraw)
{
VRageRender.MyRenderProxy.DebugDrawOBB(safeObb, Color.Red, 0.1f, false, true);
VRageRender.MyRenderProxy.DebugDrawOBB(safeObbWithCollisionExtents, Color.Yellow, 0.0f, false, true);
VRageRender.MyRenderProxy.DebugDrawArrow3D(safeOBBLine.From, safeOBBLine.To, Color.White, Color.Purple,
false);
VRageRender.MyRenderProxy.DebugDrawArrow3D(safeOBBLine.From, castStartSafe, Color.White, Color.Red,
false);
VRageRender.MyRenderProxy.DebugDrawArrow3D(castStartSafe, m_position, Color.White, Color.Orange, false);
}
// raycast against occluders
Vector3D safePositionCandidate;
m_safeMinimumDistance = parentEntity is MyCharacter ? 0 : (castStartSafe - m_target).Length(); // store current safe minimum dist
m_safeMinimumDistance = Math.Max(m_safeMinimumDistance, MIN_VIEWER_DISTANCE);
Vector3D raycastOrigin = (controlledEntity is MyCharacter) ? m_target : castStartSafe;
MyCameraRaycastResult raycastResult = RaycastOccludingObjects(controlledEntity, ref raycastOrigin, ref m_position,
ref castStartSafe, out safePositionCandidate);
switch (raycastResult)
{
case MyCameraRaycastResult.Ok:
case MyCameraRaycastResult.FoundOccluder:
m_positionCurrentIsSafe = true;
{
double newDist = (safePositionCandidate - m_position).Length();
if (newDist < m_lastRaycastDist - CAMERA_RADIUS)
{
// new safe position is further from target => change over time
float distDiffZoomSpeed = 1 - MathHelper.Clamp((float)(m_lastRaycastDist - newDist), 0.0f, 1.0f - MyEngineConstants.UPDATE_STEP_SIZE_IN_SECONDS);
m_positionSafeZoomingOutSpeed += distDiffZoomSpeed;
m_positionSafeZoomingOutSpeed = MathHelper.Clamp(m_positionSafeZoomingOutSpeed, 0.0f, 1.0f);
m_positionSafe = Vector3D.Lerp(m_positionSafe, safePositionCandidate, m_positionSafeZoomingOutSpeed);
}
else
{
// new safe position is closer => instant change
m_positionSafeZoomingOutSpeed = 0.0f; // set zooming out speed to zero for next time
m_positionSafe = safePositionCandidate;
}
}
break;
//case MyCameraRaycastResult.FoundOccluderNoSpace:
default:
m_positionSafeZoomingOutSpeed = 1.0f; // we're in first person, change instantly to third if possible
m_positionCurrentIsSafe = false;
break;
}
m_lastRaycastDist = (float)(m_positionSafe - m_position).Length();
if (m_debugDraw)
{
VRageRender.MyRenderProxy.DebugDrawSphere(m_positionSafe, 0.2f, Color.Purple, 1, false);
VRageRender.MyRenderProxy.DebugDrawSphere(safePositionCandidate, 0.2f, Color.Azure, 1, false);
}
return(m_positionCurrentIsSafe);
}
