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using System;
using System.Collections;
using System.Reflection;
namespace UnityEngine
{
internal class SendMouseEvents
{
struct HitInfo
{
public GameObject target;
public Camera camera;
public void SendMessage (string name)
{
target.SendMessage (name, null, SendMessageOptions.DontRequireReceiver);
}
public static implicit operator bool (HitInfo exists)
{
return exists.target != null && exists.camera != null;
}
public static bool Compare (HitInfo lhs, HitInfo rhs)
{
return lhs.target == rhs.target && lhs.camera == rhs.camera;
}
}
static HitInfo[] m_LastHit = { new HitInfo (), new HitInfo () };
static HitInfo[] m_MouseDownHit = { new HitInfo (), new HitInfo () };
static RaycastHit2D[] m_MouseRayHits2D = {new RaycastHit2D()};
[NotRenamed]
static void DoSendMouseEvents (int mouseUsed, int skipRTCameras)
{
HitInfo[] currentHit = { new HitInfo (), new HitInfo () };
Vector3 mousePosition = Input.mousePosition;
Camera[] cameras = Camera.allCameras;
// If UnityGUI has the mouse over, we simply don't do any mouse hit detection.
// That way, it will appear as if the mouse has missed everything.
if (mouseUsed == 0)
{
foreach (Camera camera in cameras)
{
// we do not want to check cameras that are rendering to textures, starting with 4.0
if (skipRTCameras != 0 && camera.targetTexture != null)
continue;
// Is the mouse inside the cameras viewport?
Rect rect = camera.pixelRect;
if (!rect.Contains (mousePosition))
continue;
// Did we hit any gui elements?
GUILayer layer = (GUILayer)camera.GetComponent (typeof (GUILayer));
if (layer)
{
GUIElement element = layer.HitTest (mousePosition);
if (element)
{
currentHit[0].target = element.gameObject;
currentHit[0].camera = camera;
}
}
#if ENABLE_PHYSICS || ENABLE_2D_PHYSICS
// There is no need to continue if the camera shouldn't be sending out events
if ((int)camera.eventMask == 0)
continue;
#if ENABLE_PHYSICS
// Did we hit any colliders?
RaycastHit hit;
if (camera.farClipPlane > 0.0f && Physics.Raycast (camera.ScreenPointToRay (mousePosition),
out hit, camera.farClipPlane, camera.cullingMask & camera.eventMask & Physics.DefaultRaycastLayers
))
{
if (hit.rigidbody)
{
currentHit[1].target = hit.rigidbody.gameObject;
currentHit[1].camera = camera;
}
else
{
currentHit[1].target = hit.collider.gameObject;
currentHit[1].camera = camera;
}
}
#endif
#if ENABLE_2D_PHYSICS
// Did we hit any 2D colliders?
else if (camera.farClipPlane > 0.0f)
{
// Did we hit any 2D colliders?
if (Physics2D.GetRayIntersectionNonAlloc (camera.ScreenPointToRay (mousePosition),
m_MouseRayHits2D, camera.farClipPlane, camera.cullingMask & camera.eventMask & Physics2D.DefaultRaycastLayers) == 1)
{
currentHit[1].camera = camera;
if (m_MouseRayHits2D[0].rigidbody)
currentHit[1].target = m_MouseRayHits2D[0].rigidbody.gameObject;
else
currentHit[1].target = m_MouseRayHits2D[0].collider.gameObject;
}
}
#endif
else
{
// We did not hit anything with a raycast from this camera. But our camera
// clears the screen and renders on top of whatever was below, thus making things
// rendered before invisible. So clear any previous hit we have found.
if (camera.clearFlags == CameraClearFlags.Skybox || camera.clearFlags == CameraClearFlags.Color)
{
currentHit[1].target = null;
currentHit[1].camera = null;
}
}
#endif
}
}
// i=0: CameraGUILayer, i=1: 3D Objects
for (int i=0;i<2;i++)
SendEvents(i, currentHit[i]);
}
/// <summary>
/// Old-style mouse events used prior to the new event system of 4.2.
/// </summary>
static void SendEvents (int i, HitInfo hit)
{
// Handle MouseDown, MouseDrag, MouseUp
bool mouseDownThisFrame = Input.GetMouseButtonDown(0);
bool mousePressed = Input.GetMouseButton(0);
if (mouseDownThisFrame)
{
if (hit)
{
m_MouseDownHit[i] = hit;
m_MouseDownHit[i].SendMessage("OnMouseDown");
}
}
else if (!mousePressed)
{
if (m_MouseDownHit[i])
{
// For button like behavior only fire this event if same as on MouseDown
if (HitInfo.Compare(hit, m_MouseDownHit[i]))
m_MouseDownHit[i].SendMessage("OnMouseUpAsButton");
// For backwards compatibility we keep the event name OnMouseUp
m_MouseDownHit[i].SendMessage("OnMouseUp");
m_MouseDownHit[i] = new HitInfo();
}
}
else if (m_MouseDownHit[i])
{
m_MouseDownHit[i].SendMessage("OnMouseDrag");
}
// Handle MouseOver, MouseEnter, MouseExit
if (HitInfo.Compare(hit, m_LastHit[i]))
{
if (hit)
hit.SendMessage("OnMouseOver");
}
else
{
if (m_LastHit[i])
{
m_LastHit[i].SendMessage("OnMouseExit");
}
if (hit)
{
hit.SendMessage("OnMouseEnter");
hit.SendMessage("OnMouseOver");
}
}
m_LastHit[i] = hit;
}
}
}
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