using UnityEngine;
using UnityEngine.Rendering;
using System.Collections;
using System.Collections.Generic;
// See _ReadMe.txt
public class DeferredDecalSystem
{
static DeferredDecalSystem m_Instance;
static public DeferredDecalSystem instance {
get {
if (m_Instance == null)
m_Instance = new DeferredDecalSystem();
return m_Instance;
}
}
internal HashSet<Decal> m_DecalsDiffuse = new HashSet<Decal <img rel="usm" src="/SML/angry.gif" border="0" align="absmiddle" alt=">(" /> );
internal HashSet<Decal> m_DecalsNormals = new HashSet<Decal <img rel="usm" src="/SML/angry.gif" border="0" align="absmiddle" alt=">(" /> );
internal HashSet<Decal> m_DecalsBoth = new HashSet<Decal <img rel="usm" src="/SML/angry.gif" border="0" align="absmiddle" alt=">(" /> );
public void AddDecal (Decal d)
{
RemoveDecal (d);
if (d.m_Kind == Decal.Kind.DiffuseOnly)
m_DecalsDiffuse.Add (d);
if (d.m_Kind == Decal.Kind.NormalsOnly)
m_DecalsNormals.Add (d);
if (d.m_Kind == Decal.Kind.Both)
m_DecalsBoth.Add (d);
}
public void RemoveDecal (Decal d)
{
m_DecalsDiffuse.Remove (d);
m_DecalsNormals.Remove (d);
m_DecalsBoth.Remove (d);
}
}
[ExecuteInEditMode]
public class DeferredDecalRenderer : MonoBehaviour
{
public Mesh m_CubeMesh;
private Dictionary<Camera,CommandBuffer> m_Cameras = new Dictionary<Camera,CommandBuffer <img rel="usm" src="/SML/angry.gif" border="0" align="absmiddle" alt=">(" /> );
public void OnDisable()
{
foreach (var cam in m_Cameras)
{
if (cam.Key)
{
cam.Key.RemoveCommandBuffer (CameraEvent.BeforeLighting, cam.Value);
}
}
}
public void OnWillRenderObject()
{
var act = gameObject.activeInHierarchy && enabled;
if (!act)
{
OnDisable();
return;
}
var cam = Camera.current;
if (!cam)
return;
CommandBuffer buf = null;
if (m_Cameras.ContainsKey(cam))
{
buf = m_Cameras[cam];
buf.Clear ();
}
else
{
buf = new CommandBuffer();
buf.name = "Deferred decals";
m_Cameras[cam] = buf;
// set this command buffer to be executed just before deferred lighting pass
// in the camera
cam.AddCommandBuffer (CameraEvent.BeforeLighting, buf);
}
//@TODO: in a real system should cull decals, and possibly only
// recreate the command buffer when something has changed.
var system = DeferredDecalSystem.instance;
// copy g-buffer normals into a temporary RT
var normalsID = Shader.PropertyToID("_NormalsCopy");
buf.GetTemporaryRT (normalsID, -1, -1);
buf.Blit (BuiltinRenderTextureType.GBuffer2, normalsID);
// render diffuse-only decals into diffuse channel
buf.SetRenderTarget (BuiltinRenderTextureType.GBuffer0, BuiltinRenderTextureType.CameraTarget);
foreach (var decal in system.m_DecalsDiffuse)
{
buf.DrawMesh (m_CubeMesh, decal.transform.localToWorldMatrix, decal.m_Material);
}
// render normals-only decals into normals channel
buf.SetRenderTarget (BuiltinRenderTextureType.GBuffer2, BuiltinRenderTextureType.CameraTarget);
foreach (var decal in system.m_DecalsNormals)
{
buf.DrawMesh (m_CubeMesh, decal.transform.localToWorldMatrix, decal.m_Material);
}
// render diffuse+normals decals into two MRTs
RenderTargetIdentifier[] mrt = {BuiltinRenderTextureType.GBuffer0, BuiltinRenderTextureType.GBuffer2};
buf.SetRenderTarget (mrt, BuiltinRenderTextureType.CameraTarget);
foreach (var decal in system.m_DecalsBoth)
{
buf.DrawMesh (m_CubeMesh, decal.transform.localToWorldMatrix, decal.m_Material);
}
// release temporary normals RT
buf.ReleaseTemporaryRT (normalsID);
}
}
