public void AddNewPolygonList(List<TransparentPolygonReference> p, Transform transform, Frustum frustum, Camera cam)
{
foreach (var pp in p)
{
var transformed = new Polygon();
transformed.Vertices.Resize(pp.Polygon.Vertices.Count, () => new Vertex());
transformed.Transform(pp.Polygon, transform);
transformed.DoubleSide = pp.Polygon.DoubleSide;
if(frustum.IsPolyVisible(transformed, cam))
{
addPolygon(ref _root, new BSPFaceRef(transform, pp), transformed);
}
}
}
/// <summary>
/// Check polygon visibility through the portal.
/// </summary>
public bool IsPolyVisible(Polygon p, Camera cam)
{
if (!p.DoubleSide && p.Plane.Distance(cam.Position) < 0)
return false;
// Direction from the camera position to an arbitrary vertex frustum
StaticFuncs.Assert(Vertices.Any());
var dir = Vertices[0] - cam.Position;
var lambda = 0.0f;
// Polygon fits whole frustum (shouldn't happen, but we check anyway)
if(p.RayIntersect(dir, cam.Position, ref lambda))
{
return true;
}
// Generate queue order
var nextPlaneIdx = 0;
// 3 neighboring clipping planes
var currentPlane = Planes.Last();
var prevPlane = Planes[Planes.Count - 2];
// in case no intersection
var ins = true;
// iterate through all the planes of this frustum
for (var i = 0; i < Vertices.Count; i++)
{
var nextPlane = Planes[nextPlaneIdx];
// Queue vertices for testing
var prevVertex = p.Vertices.Last();
// signed distance from the current point to the previous plane
var dist0 = currentPlane.Distance(prevVertex.Position);
var outs = true;
// iterate through all the vertices of the polygon
foreach (var currentVertex in p.Vertices)
{
var dist1 = currentPlane.Distance(currentVertex.Position);
// the split point in the plane
if(Math.Abs(dist0) < SPLIT_EPSILON)
{
if(prevPlane.Distance(prevVertex.Position) > -SPLIT_EPSILON
&& nextPlane.Distance(prevVertex.Position) > -SPLIT_EPSILON
&& Normal.Distance(prevVertex.Position) > -SPLIT_EPSILON)
{
// Frustum-vertex intersection test is passed
return true;
}
}
// vertices from different sides of the plane (or on it)
if(dist0 * dist1 < 0 && Math.Abs(dist1) >= SPLIT_EPSILON)
{
// vector connecting vertices
dir = currentVertex.Position - prevVertex.Position;
// We are looking for the point of intersection
var T = currentPlane.RayIntersect(prevVertex.Position, dir);
if(prevPlane.Distance(T) > -SPLIT_EPSILON && nextPlane.Distance(T) > -SPLIT_EPSILON)
{
// Frustum-ray intersection test is passed
return true;
}
}
// point is outside
if(dist1 < -SPLIT_EPSILON)
{
ins = false;
}
else
{
outs = false;
}
// We moved all the vertices of the polygon
prevVertex = currentVertex;
// We moved all distances
dist0 = dist1;
// finished with all polygon vertices
}
if(outs)
{
// all points are outside of the current plane - definitely exit
return false;
}
// We moved all the clipping planes
prevPlane = currentPlane;
currentPlane = nextPlane;
nextPlaneIdx++;
// finished with all planes of this frustum
}
if(ins)
{
// all the vertices are inside - test is passed
return true;
}
return false;
}
public void GenClipPlanes(Camera cam)
{
if (Vertices.Count == 0)
return;
Planes.Resize(Vertices.Count, () => new Plane());
var curr_v = Vertices.Last();
var prev_v = Vertices[Vertices.Count - 2];
for (var i = 0; i < Vertices.Count; i++)
{
var V1 = prev_v - cam.Position; // POV-vertx vector
var V2 = prev_v - curr_v; // vector connecting neighbor vertices
V1.Normalize();
V2.Normalize();
Planes[i].Assign(V1, V2, curr_v);
prev_v = curr_v;
curr_v = Vertices[i];
}
}
public bool IsOBBVisible(OBB obb, Camera cam)
{
var ins = true;
foreach (var p in obb.Polygons)
{
var t = p.Plane.Distance(cam.Position);
if(t > 0.0 && IsPolyVisible(p, cam))
{
return true;
}
if(ins && t > 0)
{
ins = false;
}
}
return ins;
}
public bool IsAABBVisible(Vector3 bbMin, Vector3 bbMax, Camera cam)
{
var poly = new Polygon();
poly.Vertices = new List<Vertex>(4);
var ins = true;
// X AXIS
if(cam.Position.X < bbMin.X)
{
poly.Plane.Normal.X = -1.0f;
poly.Plane.Dot = -bbMin.X;
poly.Vertices[0].Position[0] = bbMin[0];
poly.Vertices[0].Position[1] = bbMax[1];
poly.Vertices[0].Position[2] = bbMax[2];
poly.Vertices[1].Position[0] = bbMin[0];
poly.Vertices[1].Position[1] = bbMin[1];
poly.Vertices[1].Position[2] = bbMax[2];
poly.Vertices[2].Position[0] = bbMin[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMin[2];
poly.Vertices[3].Position[0] = bbMin[0];
poly.Vertices[3].Position[1] = bbMax[1];
poly.Vertices[3].Position[2] = bbMin[2];
if(IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
else if(cam.Position.X > bbMax.X)
{
poly.Plane.Normal.X = 1.0f;
poly.Plane.Dot = bbMax.X;
poly.Vertices[0].Position[0] = bbMax[0];
poly.Vertices[0].Position[1] = bbMax[1];
poly.Vertices[0].Position[2] = bbMax[2];
poly.Vertices[1].Position[0] = bbMax[0];
poly.Vertices[1].Position[1] = bbMin[1];
poly.Vertices[1].Position[2] = bbMax[2];
poly.Vertices[2].Position[0] = bbMax[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMin[2];
poly.Vertices[3].Position[0] = bbMax[0];
poly.Vertices[3].Position[1] = bbMax[1];
poly.Vertices[3].Position[2] = bbMin[2];
if (IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
// Y AXIS
poly.Plane.Normal.X = 0;
poly.Plane.Normal.Z = 0;
if (cam.Position.Y < bbMin.Y)
{
poly.Plane.Normal.Y = -1.0f;
poly.Plane.Dot = -bbMin.Y;
poly.Vertices[0].Position[0] = bbMax[0];
poly.Vertices[0].Position[1] = bbMin[1];
poly.Vertices[0].Position[2] = bbMax[2];
poly.Vertices[1].Position[0] = bbMin[0];
poly.Vertices[1].Position[1] = bbMin[1];
poly.Vertices[1].Position[2] = bbMax[2];
poly.Vertices[2].Position[0] = bbMin[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMin[2];
poly.Vertices[3].Position[0] = bbMax[0];
poly.Vertices[3].Position[1] = bbMin[1];
poly.Vertices[3].Position[2] = bbMin[2];
if (IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
else if (cam.Position.Y > bbMax.Y)
{
poly.Plane.Normal.Y = 1.0f;
poly.Plane.Dot = -bbMax.Y;
poly.Vertices[0].Position[0] = bbMax[0];
poly.Vertices[0].Position[1] = bbMax[1];
poly.Vertices[0].Position[2] = bbMax[2];
poly.Vertices[1].Position[0] = bbMax[0];
poly.Vertices[1].Position[1] = bbMin[1];
poly.Vertices[1].Position[2] = bbMax[2];
poly.Vertices[2].Position[0] = bbMax[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMin[2];
poly.Vertices[3].Position[0] = bbMax[0];
poly.Vertices[3].Position[1] = bbMax[1];
poly.Vertices[3].Position[2] = bbMin[2];
if (IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
// Z AXIS
poly.Plane.Normal.X = 0;
poly.Plane.Normal.Y = 0;
if (cam.Position.Z < bbMin.Z)
{
poly.Plane.Normal.Z = -1.0f;
poly.Plane.Dot = -bbMin.Z;
poly.Vertices[0].Position[0] = bbMax[0];
poly.Vertices[0].Position[1] = bbMax[1];
poly.Vertices[0].Position[2] = bbMin[2];
poly.Vertices[1].Position[0] = bbMin[0];
poly.Vertices[1].Position[1] = bbMax[1];
poly.Vertices[1].Position[2] = bbMin[2];
poly.Vertices[2].Position[0] = bbMin[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMin[2];
poly.Vertices[3].Position[0] = bbMax[0];
poly.Vertices[3].Position[1] = bbMin[1];
poly.Vertices[3].Position[2] = bbMin[2];
if (IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
else if (cam.Position.Z > bbMax.Z)
{
poly.Plane.Normal.Z = 1.0f;
poly.Plane.Dot = -bbMax.Z;
poly.Vertices[0].Position[0] = bbMax[0];
poly.Vertices[0].Position[1] = bbMax[1];
poly.Vertices[0].Position[2] = bbMax[2];
poly.Vertices[1].Position[0] = bbMin[0];
poly.Vertices[1].Position[1] = bbMax[1];
poly.Vertices[1].Position[2] = bbMax[2];
poly.Vertices[2].Position[0] = bbMin[0];
poly.Vertices[2].Position[1] = bbMin[1];
poly.Vertices[2].Position[2] = bbMax[2];
poly.Vertices[3].Position[0] = bbMax[0];
poly.Vertices[3].Position[1] = bbMin[1];
poly.Vertices[3].Position[2] = bbMax[2];
if (IsPolyVisible(poly, cam))
{
return true;
}
ins = false;
}
return ins;
}
public static void Cam_FollowEntity(Camera cam, Entity ent, float dx, float dz)
{
var cameraFrom = new Transform();
var cameraTo = new Transform();
// Reset to initial
cameraFrom.SetIdentity();
cameraTo.SetIdentity();
var cb = ent.CallbackForCamera();
var camPos = cam.Position;
// Basic camera override, completely placeholder until a system classic-like is created
if (!ControlStates.MouseLook) // If mouse look is off
{
var currentAngle = CamAngles.X * RadPerDeg; // Current is the current cam angle
var targetAngle = ent.Angles.X * RadPerDeg;
// Target is the target angle which is the entity's angle itself
var rotSpeed = 2.0f; // Speed of rotation
//@FIXME
// If Lara is in a specific state we want to rotate -75 deg or +75 deg depending on camera collision
if(ent.Bf.Animations.LastState == TR_STATE.LaraReach)
{
if(cam.TargetDir == TR_CAM_TARG.Back)
{
var camPos2 = camPos;
cameraFrom.Origin = camPos2;
camPos2.X += (float) (Math.Sin((ent.Angles.X - 90.0f) * RadPerDeg) *
ControlStates.CamDistance);
camPos2.Y -= (float) (Math.Cos((ent.Angles.X - 90.0f) * RadPerDeg) *
ControlStates.CamDistance);
cameraTo.Origin = camPos2;
// If collided we want to go right otherwise stay left
if(Cam_HasHit(cb, cameraFrom, cameraTo))
{
camPos2 = camPos;
cameraFrom.Origin = camPos2;
camPos2.X += (float)(Math.Sin((ent.Angles.X + 90.0f) * RadPerDeg) *
ControlStates.CamDistance);
camPos2.Y -= (float)(Math.Cos((ent.Angles.X + 90.0f) * RadPerDeg) *
ControlStates.CamDistance);
cameraTo.Origin = camPos2;
// If collided we want to go to back else right
cam.TargetDir = Cam_HasHit(cb, cameraFrom, cameraTo) ? TR_CAM_TARG.Back : TR_CAM_TARG.Right;
}
else
{
cam.TargetDir = TR_CAM_TARG.Left;
}
}
}
else if(ent.Bf.Animations.LastState == TR_STATE.LaraJumpBack)
{
cam.TargetDir = TR_CAM_TARG.Front;
}
// ReSharper disable once RedundantCheckBeforeAssignment
else if(cam.TargetDir != TR_CAM_TARG.Back)
{
cam.TargetDir = TR_CAM_TARG.Back; // Reset to back
}
// If target mis-matches current we need to update the camera's angle to reach target!
if (currentAngle != targetAngle)
{
switch (cam.TargetDir)
{
case TR_CAM_TARG.Back:
targetAngle = ent.Angles.X * RadPerDeg;
break;
case TR_CAM_TARG.Front:
targetAngle = (ent.Angles.X - 180.0f) * RadPerDeg;
break;
case TR_CAM_TARG.Left:
targetAngle = (ent.Angles.X - 75.0f) * RadPerDeg;
break;
case TR_CAM_TARG.Right:
targetAngle = (ent.Angles.X + 75.0f) * RadPerDeg;
break;
default:
targetAngle = ent.Angles.X * RadPerDeg; // Same as TR_CAM_TARG_BACK (default pos)
break;
}
var dAngle = CamAngles.X - targetAngle;
if (dAngle > Rad90)
{
dAngle -= 1 * RadPerDeg;
}
else
{
dAngle += 1 * RadPerDeg;
}
CamAngles.X =
(CamAngles.X +
Helper.Atan2((float) Math.Sin(currentAngle - dAngle), (float) Math.Cos(currentAngle + dAngle)) *
EngineFrameTime * rotSpeed) % Rad360; // Update camera's angle
}
}
camPos = ent.CamPosForFollowing(dz);
// Code to manage screen shaking effects
if(Renderer.Camera.ShakeTime > 0.0f && Renderer.Camera.ShakeValue > 0.0f)
{
camPos = camPos.AddF((Helper.CPPRand() % Math.Abs(Renderer.Camera.ShakeValue) -
Renderer.Camera.ShakeValue / 2.0f) * Renderer.Camera.ShakeTime);
Renderer.Camera.ShakeTime = Renderer.Camera.ShakeTime < 0.0f
? 0.0f
: Renderer.Camera.ShakeTime - EngineFrameTime;
}
cameraFrom.Origin = camPos;
camPos.Z += dz;
cameraTo.Origin = camPos;
if(Cam_HasHit(cb, cameraFrom, cameraTo))
{
Helper.SetInterpolate3(out camPos, cameraFrom.Origin, cameraTo.Origin, cb.ClosestHitFraction);
camPos += (cb.HitNormalWorld * 2.0f).ToOpenTK();
}
if(dx != 0.0f)
{
cameraFrom.Origin = camPos;
camPos += dx * cam.RightDirection;
cameraTo.Origin = camPos;
if (Cam_HasHit(cb, cameraFrom, cameraTo))
{
Helper.SetInterpolate3(out camPos, cameraFrom.Origin, cameraTo.Origin, cb.ClosestHitFraction);
camPos += (cb.HitNormalWorld * 2.0f).ToOpenTK();
}
cameraFrom.Origin = camPos;
var cosAy = Math.Cos(CamAngles.Y);
var camDx = Math.Sin(CamAngles.X) * cosAy;
var camDy = -Math.Cos(CamAngles.X) * cosAy;
var camDz = -Math.Sin(CamAngles.Y);
camPos.X += (float) (camDx * ControlStates.CamDistance);
camPos.Y += (float) (camDy * ControlStates.CamDistance);
camPos.Z += (float) (camDz * ControlStates.CamDistance);
cameraTo.Origin = camPos;
if (Cam_HasHit(cb, cameraFrom, cameraTo))
{
Helper.SetInterpolate3(out camPos, cameraFrom.Origin, cameraTo.Origin, cb.ClosestHitFraction);
camPos += (cb.HitNormalWorld * 2.0f).ToOpenTK();
}
}
// Update cam pos
cam.Position = camPos;
// Modify cam pos for quicksand rooms
cam.CurrentRoom = Room.FindPosCogerrence(cam.Position - new Vector3(0, 0, 128), cam.CurrentRoom);
if(cam.CurrentRoom != null && cam.CurrentRoom.Flags.HasFlagUns(RoomFlag.Quicksand))
{
var pos = cam.Position;
pos.Z = cam.CurrentRoom.BBMax.Z + 2.0f * 64.0f;
cam.Position = pos;
}
cam.SetRotation(CamAngles);
cam.CurrentRoom = Room.FindPosCogerrence(cam.Position, cam.CurrentRoom);
}
public bool IsVisibleInRoom(Room room, Camera cam)
{
var polys = Polygons;
if (room.Frustum.Count == 0)
{
var ins = true;
foreach (var polygon in polys)
{
var t = polygon.Plane.Distance(EngineCamera.Position);
if (t > 0 && EngineCamera.Frustum.IsPolyVisible(polygon, cam))
{
return true;
}
if (ins && t > 0)
{
ins = false;
}
}
return ins;
}
return room.Frustum.Any(frustum => (from polygon in polys
let t = polygon.Plane.Distance(cam.Position)
where t > 0 && frustum.IsPolyVisible(polygon, cam)
select polygon).Any());
}
