/// <summary>
/// Returns a list of game objects which are visible to the specified camera.
/// </summary>
/// <remarks>
/// This function detects only objects which have a collider attached to them.
/// </remarks>
public static List <GameObject> GetVisibleGameObjects(this Camera camera)
{
// We need the camera view volume to detect the visible game objects
var cameraViewVolume = new CameraViewVolume();
cameraViewVolume.BuildForCamera(camera, camera.farClipPlane);
// In order to detect the visible game objects, we will loop through all POTTENTIALLY visible
// game objects and check if their AABB lies inside the camera frustum.
List <GameObject> pottentiallyVisibleGameObjects = camera.GetPottentiallyVisibleGameObjects();
var visibleGameObjects = new List <GameObject>(pottentiallyVisibleGameObjects.Count); // Set initial capacity to avoid resize
foreach (GameObject gameObject in pottentiallyVisibleGameObjects)
{
// If the game object's world space AABB intersects the camera frustum, it means it is visible
Box worldSpaceAABB = gameObject.GetWorldBox();
if (worldSpaceAABB.IsInvalid())
{
continue;
}
if (cameraViewVolume.ContainsWorldSpaceAABB(worldSpaceAABB.ToBounds()))
{
visibleGameObjects.Add(gameObject);
}
}
// Return the visible objects list to the caller
return(visibleGameObjects);
}
public static void DrawGridLines(float cellSizeX, float cellSizeZ, Camera camera, Material material, Color color)
{
CameraViewVolume viewVolume = camera.GetViewVolume(camera.farClipPlane);
Bounds volumeAABB = viewVolume.AABB;
float minX = volumeAABB.min.x;
float minZ = volumeAABB.min.z;
float maxX = volumeAABB.max.x;
float maxZ = volumeAABB.max.z;
float halfCellSizeX = 0.5f * cellSizeX;
float halfCellSizeZ = 0.5f * cellSizeZ;
int minCellX = Mathf.FloorToInt((minX + halfCellSizeX) / cellSizeX) - 1;
int maxCellX = Mathf.FloorToInt((maxX + halfCellSizeX) / cellSizeX) + 1;
int minCellZ = Mathf.FloorToInt((minZ + halfCellSizeZ) / cellSizeZ) - 1;
int maxCellZ = Mathf.FloorToInt((maxZ + halfCellSizeZ) / cellSizeZ) + 1;
material.SetColor("_Color", color);
material.SetPass(0);
int minCellIndex = minCellX < minCellZ ? minCellX : minCellZ;
int maxCellIndex = maxCellX > maxCellZ ? maxCellX : maxCellZ;
GL.Begin(GL.LINES);
float startZ = minCellIndex * cellSizeZ;
float endZ = (maxCellIndex + 1) * cellSizeZ;
float startX = minCellIndex * cellSizeX;
float endX = (maxCellIndex + 1) * cellSizeX;
for (int cell = minCellIndex; cell <= maxCellIndex; ++cell)
{
Vector3 xOffset = cell * Vector3.right * cellSizeX;
GL.Vertex(xOffset + Vector3.forward * startZ);
GL.Vertex(xOffset + Vector3.forward * endZ);
Vector3 zOffset = cell * Vector3.forward * cellSizeZ;
GL.Vertex(zOffset + Vector3.right * startX);
GL.Vertex(zOffset + Vector3.right * endX);
}
/*
* float startZ = minCellZ * cellSizeZ;
* float endZ = (maxCellZ + 1) * cellSizeZ;
* for (int x = minCellX; x <= maxCellX; ++x)
* {
* Vector3 xOffset = x * Vector3.right * cellSizeX;
* GL.Vertex(xOffset + Vector3.forward * startZ);
* GL.Vertex(xOffset + Vector3.forward * endZ);
* }
*
* float startX = minCellX * cellSizeX;
* float endX = (maxCellX + 1) * cellSizeX;
* for (int z = minCellZ; z <= maxCellZ; ++z)
* {
* Vector3 zOffset = z * Vector3.forward * cellSizeZ;
* GL.Vertex(zOffset + Vector3.right * startX);
* GL.Vertex(zOffset + Vector3.right * endX);
* }*/
GL.End();
}
/// <summary>
/// Returns a list of game objects which COULD be visible to the specified camera. Essentially,
/// the function gathers the game objects which sit around the camera and which might be visible
/// when rendered.
/// </summary>
/// <remarks>
/// This function detects only objects which have a collider attached to them.
/// </remarks>
private static List <GameObject> GetPottentiallyVisibleGameObjects(this Camera camera)
{
CameraViewVolume cameraViewVolume = camera.GetViewVolume();
Box viewVolumeBox = Box.FromBounds(cameraViewVolume.AABB);
return(EditorScene.Instance.OverlapBox(viewVolumeBox));
}
public static CameraViewVolume GetViewVolume(this Camera camera, float desiredFarClipPlane)
{
// Create the view volume
var viewVolume = new CameraViewVolume();
viewVolume.BuildForCamera(camera, desiredFarClipPlane);
// Return the view volume to the caller
return(viewVolume);
}
public static bool IsGameObjectVisible(this Camera camera, GameObject gameObject)
{
var cameraViewVolume = new CameraViewVolume();
cameraViewVolume.BuildForCamera(camera, camera.farClipPlane);
Box worldSpaceAABB = gameObject.GetWorldBox();
if (worldSpaceAABB.IsInvalid())
{
return(false);
}
return(cameraViewVolume.ContainsWorldSpaceAABB(worldSpaceAABB.ToBounds()));
}
public void OnCameraUpdate(Camera camera, bool isDoingPerspectiveSwitch)
{
Transform cameraTransform = camera.transform;
Transform bkTransform = GetBkGameObject().transform;
bkTransform.position = cameraTransform.position + cameraTransform.forward * camera.farClipPlane * 0.98f;
bkTransform.rotation = cameraTransform.rotation;
bkTransform.parent = null;
CameraViewVolume viewVolume = camera.GetViewVolume();
bkTransform.localScale = isDoingPerspectiveSwitch ? new Vector3(9999.0f, 9999.0f, 1.0f) : new Vector3(viewVolume.FarPlaneSize.x, viewVolume.FarPlaneSize.y, 1.0f);
bkTransform.parent = cameraTransform;
Material material = MaterialPool.Instance.GradientCameraBk;
material.SetVector("_TopColor", _topColor);
material.SetVector("_BottomColor", _bottomColor);
material.SetFloat("_GradientOffset", _gradientOffset);
material.SetFloat("_Height", bkTransform.localScale.y);
}
/// <summary>
/// Calculates and returns the edge rays which connect the points of the specified camera
/// view volume.
/// </summary>
public static Ray3D[] CalculateWorldSpaceVolumeEdgeRays(CameraViewVolume cameraViewVolume)
{
var worldSpaceVolumeEdgeRays = new Ray3D[12];
// Calculate the rays that connect the points on the near plane
worldSpaceVolumeEdgeRays[0] = new Ray3D(cameraViewVolume.TopLeftPointOnNearPlane, cameraViewVolume.TopRightPointOnNearPlane - cameraViewVolume.TopLeftPointOnNearPlane);
worldSpaceVolumeEdgeRays[1] = new Ray3D(cameraViewVolume.TopRightPointOnNearPlane, cameraViewVolume.BottomRightPointOnNearPlane - cameraViewVolume.TopRightPointOnNearPlane);
worldSpaceVolumeEdgeRays[2] = new Ray3D(cameraViewVolume.BottomRightPointOnNearPlane, cameraViewVolume.BottomLeftPointOnNearPlane - cameraViewVolume.BottomRightPointOnNearPlane);
worldSpaceVolumeEdgeRays[3] = new Ray3D(cameraViewVolume.BottomLeftPointOnNearPlane, cameraViewVolume.TopLeftPointOnNearPlane - cameraViewVolume.BottomLeftPointOnNearPlane);
// Calculate the rays that connect the points on the far plane
worldSpaceVolumeEdgeRays[4] = new Ray3D(cameraViewVolume.TopLeftPointOnFarPlane, cameraViewVolume.TopRightPointOnFarPlane - cameraViewVolume.TopLeftPointOnFarPlane);
worldSpaceVolumeEdgeRays[5] = new Ray3D(cameraViewVolume.TopRightPointOnFarPlane, cameraViewVolume.BottomRightPointOnFarPlane - cameraViewVolume.TopRightPointOnFarPlane);
worldSpaceVolumeEdgeRays[6] = new Ray3D(cameraViewVolume.BottomRightPointOnFarPlane, cameraViewVolume.BottomLeftPointOnFarPlane - cameraViewVolume.BottomRightPointOnFarPlane);
worldSpaceVolumeEdgeRays[7] = new Ray3D(cameraViewVolume.BottomLeftPointOnFarPlane, cameraViewVolume.TopLeftPointOnFarPlane - cameraViewVolume.BottomLeftPointOnFarPlane);
// Calculate the rays that connect the points between the near and far planes
worldSpaceVolumeEdgeRays[8] = new Ray3D(cameraViewVolume.TopLeftPointOnNearPlane, cameraViewVolume.TopLeftPointOnFarPlane - cameraViewVolume.TopLeftPointOnNearPlane);
worldSpaceVolumeEdgeRays[9] = new Ray3D(cameraViewVolume.TopRightPointOnNearPlane, cameraViewVolume.TopRightPointOnFarPlane - cameraViewVolume.TopRightPointOnNearPlane);
worldSpaceVolumeEdgeRays[10] = new Ray3D(cameraViewVolume.BottomRightPointOnNearPlane, cameraViewVolume.BottomRightPointOnFarPlane - cameraViewVolume.BottomRightPointOnNearPlane);
worldSpaceVolumeEdgeRays[11] = new Ray3D(cameraViewVolume.BottomLeftPointOnNearPlane, cameraViewVolume.BottomLeftPointOnFarPlane - cameraViewVolume.BottomLeftPointOnNearPlane);
return(worldSpaceVolumeEdgeRays);
}
/// <summary>
/// Called every frame to perform any necessary updates.
/// </summary>
private void Update()
{
if (RuntimeEditorApplication.Instance.UseCustomCamera)
{
_camera.enabled = false;
}
// Reset the mouse cursor position in the previous frame in order to make sure we don't
// get wild offset values which will cause unwanted effects.
if (_applicationJustGainedFocus)
{
_applicationJustGainedFocus = false;
_mouse.ResetCursorPositionInPreviousFrame();
}
// Make sure the mouse has its information updated for the current frame update
_mouse.UpdateInfoForCurrentFrame();
// Only process input if we are not using a custom camera
if (!RuntimeEditorApplication.Instance.UseCustomCamera)
{
if (_focusOnSelectionShortcut.IsActiveInCurrentFrame())
{
FocusOnSelection();
}
//added by me
if (toolBarController.isFocusing)
{
FocusOnSelection();
toolBarController.isFocusing = false;
}
//
if (_zoomSettings.IsZoomEnabled)
{
ApplyCameraZoomBasedOnUserInput();
}
PanCameraBasedOnUserInput();
RotateCameraBasedOnUserInput();
MoveCameraBasedOnUserInput();
}
if (Camera.orthographic)
{
Camera.nearClipPlane = 0.000001f;
// Adjust the near plane such that it doesn't intersect the grid. Otherwise, it cuts
// away from it and it looks painfully ugly :)
CameraViewVolume viewVolume = Camera.GetViewVolume();
var nearPlanePoints = new List <Vector3>();
nearPlanePoints.Add(viewVolume.TopLeftPointOnNearPlane);
nearPlanePoints.Add(viewVolume.TopRightPointOnNearPlane);
nearPlanePoints.Add(viewVolume.BottomLeftPointOnNearPlane);
nearPlanePoints.Add(viewVolume.BottomRightPointOnNearPlane);
Plane xzGridPlane = RuntimeEditorApplication.Instance.XZGrid.Plane;
if (!xzGridPlane.AreAllPointsInFrontOrBehindPlane(nearPlanePoints))
{
Vector3 pivotPoint = Vector3.zero;
float dot = Vector3.Dot(xzGridPlane.normal, Camera.transform.forward);
if (dot > 0.0f)
{
xzGridPlane.GetFurthestPointInFront(nearPlanePoints, out pivotPoint);
}
else
if (dot < 0.0f)
{
xzGridPlane.GetFurthestPointBehind(nearPlanePoints, out pivotPoint);
}
if (dot != 0.0f)
{
Ray ray = new Ray(pivotPoint, -Camera.transform.forward);
float t;
if (xzGridPlane.Raycast(ray, out t))
{
Vector3 intersectPt = ray.GetPoint(t);
float distance = (intersectPt - pivotPoint).magnitude;
Camera.nearClipPlane -= distance;
}
}
}
}
else
{
Camera.nearClipPlane = _initialNearClipPlane;
}
_background.OnCameraUpdate(Camera, _isDoingPerspectiveSwitch);
if (_transform.hasChanged)
{
SetObjectVisibilityDirty();
_transform.hasChanged = false;
}
}
