- implement Eternity-Style flat and horizon portals. Not tested yet due to lack of material to work with.

src/gl/scene/gl_portal.cpp

@@ -45,6 +45,7 @@
 #include "c_dispatch.h"
 #include "doomstat.h"
 #include "a_sharedglobal.h"
+#include "r_sky.h"
 
 #include "gl/system/gl_interface.h"
 #include "gl/system/gl_framebuffer.h"
@@ -533,7 +534,7 @@ void GLPortal::EndFrame()
 //-----------------------------------------------------------------------------
 //
 // Renders one sky portal without a stencil.
-// In more complex scenes using a stencil for skies can severly stall
+// In more complex scenes using a stencil for skies can severely stall
 // the GPU and there's rarely more than one sky visible at a time.
 //
 //-----------------------------------------------------------------------------
@@ -1080,6 +1081,69 @@ void GLHorizonPortal::DrawContents()
 	gl_RenderState.EnableTextureMatrix(false);
 	PortalAll.Unclock();
 
+}
+
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//
+//
+// Eternity-style horizon portal
+//
+// To the rest of the engine these masquerade as a skybox portal
+// Internally they need to draw two horizon or sky portals
+// and will use the respective classes to achieve that.
+//
+//
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+//
+// 
+//
+//-----------------------------------------------------------------------------
+
+void GLEEHorizonPortal::DrawContents()
+{
+	PortalAll.Clock();
+	if (origin->Sector->GetTexture(sector_t::floor) == skyflatnum ||
+		origin->Sector->GetTexture(sector_t::ceiling) == skyflatnum)
+	{
+		GLSkyInfo skyinfo;
+		skyinfo.init(origin->Sector->sky, 0);
+		GLSkyPortal sky(&skyinfo, true);
+		sky.DrawContents();
+	}
+	if (origin->Sector->GetTexture(sector_t::ceiling) != skyflatnum)
+	{
+		GLHorizonInfo horz;
+		horz.plane.GetFromSector(origin->Sector, true);
+		horz.lightlevel = gl_ClampLight(origin->Sector->GetCeilingLight());
+		horz.colormap = origin->Sector->ColorMap;
+		if (origin->flags & MF_FLOAT)
+		{
+			horz.plane.texheight = viewz + abs(horz.plane.texheight);
+		}
+		GLHorizonPortal ceil(&horz, true);
+		ceil.DrawContents();
+	}
+	if (origin->Sector->GetTexture(sector_t::floor) != skyflatnum)
+	{
+		GLHorizonInfo horz;
+		horz.plane.GetFromSector(origin->Sector, false);
+		horz.lightlevel = gl_ClampLight(origin->Sector->GetFloorLight());
+		horz.colormap = origin->Sector->ColorMap;
+		if (origin->flags & MF_FLOAT)
+		{
+			horz.plane.texheight = viewz - abs(horz.plane.texheight);
+		}
+		GLHorizonPortal floor(&horz, true);
+		floor.DrawContents();
+	}
+
+
+
 }
 
 const char *GLSkyPortal::GetName() { return "Sky"; }
@@ -1088,3 +1152,5 @@ const char *GLSectorStackPortal::GetName() { return "Sectorstack"; }
 const char *GLPlaneMirrorPortal::GetName() { return "Planemirror"; }
 const char *GLMirrorPortal::GetName() { return "Mirror"; }
 const char *GLHorizonPortal::GetName() { return "Horizon"; }
+const char *GLEEHorizonPortal::GetName() { return "EEHorizon"; }
+

src/gl/scene/gl_portal.h

@@ -70,11 +70,13 @@ struct GLSkyInfo
 	{
 		return !!memcmp(this, &inf, sizeof(*this));
 	}
+	void init(int sky1, PalEntry fadecolor);
 };
 
 extern UniqueList<GLSkyInfo> UniqueSkies;
 extern UniqueList<GLHorizonInfo> UniqueHorizons;
 extern UniqueList<secplane_t> UniquePlaneMirrors;
+struct GLEEHorizonPortal;
 
 class GLPortal
 {
@@ -110,7 +112,7 @@ protected:
 	TArray<GLWall> lines;
 	int level;
 
-	GLPortal() { portals.Push(this); }
+	GLPortal(bool local = false) { if (!local) portals.Push(this); }
 	virtual ~GLPortal() { }
 
 	bool Start(bool usestencil, bool doquery);
@@ -215,6 +217,7 @@ public:
 struct GLSkyPortal : public GLPortal
 {
 	GLSkyInfo * origin;
+	friend struct GLEEHorizonPortal;
 
 protected:
 	virtual void DrawContents();
@@ -226,7 +229,8 @@ protected:
 public:
 
 	
-	GLSkyPortal(GLSkyInfo *  pt)
+	GLSkyPortal(GLSkyInfo *  pt, bool local = false)
+		: GLPortal(local)
 	{
 		origin=pt;
 	}
@@ -281,6 +285,7 @@ public:
 struct GLHorizonPortal : public GLPortal
 {
 	GLHorizonInfo * origin;
+	friend struct GLEEHorizonPortal;
 
 protected:
 	virtual void DrawContents();
@@ -291,7 +296,28 @@ protected:
 
 public:
 	
-	GLHorizonPortal(GLHorizonInfo * pt)
+	GLHorizonPortal(GLHorizonInfo * pt, bool local = false)
+		: GLPortal(local)
+	{
+		origin=pt;
+	}
+
+};
+
+struct GLEEHorizonPortal : public GLPortal
+{
+	AActor * origin;
+
+protected:
+	virtual void DrawContents();
+	virtual void * GetSource() const { return origin; }
+	virtual bool NeedDepthBuffer() { return false; }
+	virtual bool NeedCap() { return false; }
+	virtual const char *GetName();
+
+public:
+	
+	GLEEHorizonPortal(AActor *pt)
 	{
 		origin=pt;
 	}

src/gl/scene/gl_sky.cpp

@@ -63,6 +63,72 @@ enum
 };
 
 
+//==========================================================================
+//
+//  Set up the skyinfo struct
+//
+//==========================================================================
+
+void GLSkyInfo::init(int sky1, PalEntry FadeColor)
+{
+	memset(this, 0, sizeof(*this));
+	if ((sky1 & PL_SKYFLAT) && (sky1 & (PL_SKYFLAT - 1)))
+	{
+		const line_t *l = &lines[(sky1&(PL_SKYFLAT - 1)) - 1];
+		const side_t *s = l->sidedef[0];
+		int pos;
+
+		if (level.flags & LEVEL_SWAPSKIES && s->GetTexture(side_t::bottom).isValid())
+		{
+			pos = side_t::bottom;
+		}
+		else
+		{
+			pos = side_t::top;
+		}
+
+		FTextureID texno = s->GetTexture(pos);
+		texture[0] = FMaterial::ValidateTexture(texno, false, true);
+		if (!texture[0] || texture[0]->tex->UseType == FTexture::TEX_Null) goto normalsky;
+		skytexno1 = texno;
+		x_offset[0] = ANGLE_TO_FLOAT(s->GetTextureXOffset(pos));
+		y_offset = FIXED2FLOAT(s->GetTextureYOffset(pos));
+		mirrored = !l->args[2];
+	}
+	else
+	{
+	normalsky:
+		if (level.flags&LEVEL_DOUBLESKY)
+		{
+			texture[1] = FMaterial::ValidateTexture(sky1texture, false, true);
+			x_offset[1] = GLRenderer->mSky1Pos;
+			doublesky = true;
+		}
+
+		if ((level.flags&LEVEL_SWAPSKIES || (sky1 == PL_SKYFLAT) || (level.flags&LEVEL_DOUBLESKY)) &&
+			sky2texture != sky1texture)	// If both skies are equal use the scroll offset of the first!
+		{
+			texture[0] = FMaterial::ValidateTexture(sky2texture, false, true);
+			skytexno1 = sky2texture;
+			sky2 = true;
+			x_offset[0] = GLRenderer->mSky2Pos;
+		}
+		else if (!doublesky)
+		{
+			texture[0] = FMaterial::ValidateTexture(sky1texture, false, true);
+			skytexno1 = sky1texture;
+			x_offset[0] = GLRenderer->mSky1Pos;
+		}
+	}
+	if (skyfog > 0)
+	{
+		fadecolor = FadeColor;
+		fadecolor.a = 0;
+	}
+	else fadecolor = 0;
+
+}
+
 //==========================================================================
 //
 //  Calculate sky texture
@@ -92,63 +158,7 @@ void GLWall::SkyPlane(sector_t *sector, int plane, bool allowreflect)
 		}
 		else
 		{
-			int sky1 = sector->sky;
+			skyinfo.init(sector->sky, Colormap.FadeColor);
-			memset(&skyinfo, 0, sizeof(skyinfo));
-			if ((sky1 & PL_SKYFLAT) && (sky1 & (PL_SKYFLAT-1)))
-			{
-				const line_t *l = &lines[(sky1&(PL_SKYFLAT-1))-1];
-				const side_t *s = l->sidedef[0];
-				int pos;
-				
-				if (level.flags & LEVEL_SWAPSKIES && s->GetTexture(side_t::bottom).isValid())
-				{
-					pos = side_t::bottom;
-				}
-				else
-				{
-					pos = side_t::top;
-				}
-
-				FTextureID texno = s->GetTexture(pos);
-				skyinfo.texture[0] = FMaterial::ValidateTexture(texno, false, true);
-				if (!skyinfo.texture[0] || skyinfo.texture[0]->tex->UseType == FTexture::TEX_Null) goto normalsky;
-				skyinfo.skytexno1 = texno;
-				skyinfo.x_offset[0] = ANGLE_TO_FLOAT(s->GetTextureXOffset(pos));
-				skyinfo.y_offset = FIXED2FLOAT(s->GetTextureYOffset(pos));
-				skyinfo.mirrored = !l->args[2];
-			}
-			else
-			{
-			normalsky:
-				if (level.flags&LEVEL_DOUBLESKY)
-				{
-					skyinfo.texture[1]=FMaterial::ValidateTexture(sky1texture, false, true);
-					skyinfo.x_offset[1] = GLRenderer->mSky1Pos;
-					skyinfo.doublesky = true;
-				}
-				
-				if ((level.flags&LEVEL_SWAPSKIES || (sky1==PL_SKYFLAT) || (level.flags&LEVEL_DOUBLESKY)) &&
-					sky2texture!=sky1texture)	// If both skies are equal use the scroll offset of the first!
-				{
-					skyinfo.texture[0]=FMaterial::ValidateTexture(sky2texture, false, true);
-					skyinfo.skytexno1=sky2texture;
-					skyinfo.sky2 = true;
-					skyinfo.x_offset[0] = GLRenderer->mSky2Pos;
-				}
-				else
-				{
-					skyinfo.texture[0]=FMaterial::ValidateTexture(sky1texture, false, true);
-					skyinfo.skytexno1=sky1texture;
-					skyinfo.x_offset[0] = GLRenderer->mSky1Pos;
-				}
-			}
-			if (skyfog>0) 
-			{
-				skyinfo.fadecolor=Colormap.FadeColor;
-				skyinfo.fadecolor.a=0;
-			}
-			else skyinfo.fadecolor=0;
-
 			type = RENDERWALL_SKY;
 			sky=UniqueSkies.Get(&skyinfo);
 		}
@@ -194,7 +204,7 @@ void GLWall::SkyTop(seg_t * seg,sector_t * fs,sector_t * bs,vertex_t * v1,vertex
 {
 	if (fs->GetTexture(sector_t::ceiling)==skyflatnum)
 	{
-		if ((bs->special&0xff) == NoSkyDraw) return;
+		if (bs->special == NoSkyDraw) return;
 		if (bs->GetTexture(sector_t::ceiling)==skyflatnum) 
 		{
 			// if the back sector is closed the sky must be drawn!
@@ -285,7 +295,7 @@ void GLWall::SkyBottom(seg_t * seg,sector_t * fs,sector_t * bs,vertex_t * v1,ver
 {
 	if (fs->GetTexture(sector_t::floor)==skyflatnum)
 	{
-		if ((bs->special&0xff) == NoSkyDraw) return;
+		if (bs->special == NoSkyDraw) return;
 		FTexture * tex = TexMan(seg->sidedef->GetTexture(side_t::bottom));
 		
 		// For lower skies the normal logic only applies to walls with no lower texture!

src/gl/scene/gl_walls.cpp

@@ -177,7 +177,12 @@ void GLWall::PutWall(bool translucent)
 
 	case RENDERWALL_SKYBOX:
 		portal = GLPortal::FindPortal(skybox);
-		if (!portal) portal=new GLSkyboxPortal(skybox);
+		if (!portal)
+		{
+			// either a regulat skybox or an Eternity-style horizon
+			if (skybox->flags7 & MF7_HANDLENODELAY) portal = new GLEEHorizonPortal(skybox);
+			else portal = new GLSkyboxPortal(skybox);
+		}
 		portal->AddLine(this);
 		break;
 

src/p_spec.cpp

@@ -65,6 +65,7 @@
 
 // State.
 #include "r_state.h"
+#include "r_sky.h"
 
 #include "c_console.h"
 
@@ -986,7 +987,7 @@ void P_SetupPortals()
 	}
 }
 
-inline void SetPortal(sector_t *sector, int plane, AStackPoint *portal, fixed_t alpha)
+inline void SetPortal(sector_t *sector, int plane, ASkyViewpoint *portal, fixed_t alpha)
 {
 	// plane: 0=floor, 1=ceiling, 2=both
 	if (plane > 0)
@@ -996,6 +997,8 @@ inline void SetPortal(sector_t *sector, int plane, AStackPoint *portal, fixed_t
 			sector->CeilingSkyBox = portal;
 			if (sector->GetAlpha(sector_t::ceiling) == OPAQUE)
 				sector->SetAlpha(sector_t::ceiling, alpha);
+
+			if (!portal->bAlways) sector->SetTexture(sector_t::ceiling, skyflatnum);
 		}
 	}
 	if (plane == 2 || plane == 0)
@@ -1006,6 +1009,8 @@ inline void SetPortal(sector_t *sector, int plane, AStackPoint *portal, fixed_t
 		}
 		if (sector->GetAlpha(sector_t::floor) == OPAQUE)
 			sector->SetAlpha(sector_t::floor, alpha);
+
+		if (!portal->bAlways) sector->SetTexture(sector_t::floor, skyflatnum);
 	}
 }
 
@@ -1076,6 +1081,47 @@ void P_SpawnPortal(line_t *line, int sectortag, int plane, int alpha)
 }
 
 
+void P_SpawnHorizon(line_t *line)
+{
+	ASkyViewpoint *origin = Spawn<ASkyViewpoint>(0, 0, 0, NO_REPLACE);
+	origin->Sector = line->frontsector;
+	origin->flags7 |= MF7_HANDLENODELAY;				// mark as 'special'
+	if (line->args[1] == 3) origin->flags |= MF_FLOAT;	// well, it actually does 'float'... :P
+
+
+	int s;
+	FSectorTagIterator itr(line->args[0]);
+	while ((s = itr.Next()) >= 0)
+	{
+		SetPortal(&sectors[s], line->args[2], origin, 0);
+	}
+
+	for (int j=0;j<numlines;j++)
+	{
+		// Check if this portal needs to be copied to other sectors
+		// This must be done here to ensure that it gets done only after the portal is set up
+		if (lines[j].special == Sector_SetPortal &&
+			lines[j].args[1] == 1 &&
+			(lines[j].args[2] == line->args[2] || lines[j].args[2] == 3) &&
+			lines[j].args[3] == line->args[0])
+		{
+			if (lines[j].args[0] == 0)
+			{
+				SetPortal(lines[j].frontsector, line->args[2], origin, 0);
+			}
+			else
+			{
+				FSectorTagIterator itr(lines[j].args[0]);
+				while ((s = itr.Next()) >= 0)
+				{
+					SetPortal(&sectors[s], line->args[2], origin, 0);
+				}
+			}
+		}
+	}
+}
+
+
 //
 // P_SetSectorDamage
 //
@@ -1408,6 +1454,8 @@ void P_SpawnSpecials (void)
 			//	- 0: normal (handled here)
 			//	- 1: copy (handled by the portal they copy)
 			//	- 2: EE-style skybox (handled by the camera object)
+			//  - 3: EE-style flat portal (HW renderer only for now)
+			//  - 4: EE-style horizon portal (HW renderer only for now)
 			//	other values reserved for later use
 			// arg 2 = 0:floor, 1:ceiling, 2:both
 			// arg 3 = 0: anchor, 1: reference line
@@ -1416,6 +1464,10 @@ void P_SpawnSpecials (void)
 			{
 				P_SpawnPortal(&lines[i], lines[i].args[0], lines[i].args[2], lines[i].args[4]);
 			}
+			else if (lines[i].args[1] == 3 || lines[i].args[1] == 4)
+			{
+				P_SpawnHorizon(&lines[i]);
+			}
 			break;
 
 		// [RH] ZDoom Static_Init settings

src/r_bsp.cpp

@@ -1088,6 +1088,7 @@ void R_Subsector (subsector_t *sub)
 	}
 
 	skybox = frontsector->GetSkyBox(sector_t::ceiling);
+	if (skybox->flags7 & MF7_HANDLENODELAY) skybox = NULL;	// HW renderer only.
 
 	ceilingplane = frontsector->ceilingplane.PointOnSide(viewx, viewy, viewz) > 0 ||
 		frontsector->GetTexture(sector_t::ceiling) == skyflatnum ||
@@ -1128,7 +1129,10 @@ void R_Subsector (subsector_t *sub)
 	// killough 3/7/98: Add (x,y) offsets to flats, add deep water check
 	// killough 3/16/98: add floorlightlevel
 	// killough 10/98: add support for skies transferred from sidedefs
+
 	skybox = frontsector->GetSkyBox(sector_t::floor);
+	if (skybox->flags7 & MF7_HANDLENODELAY) skybox = NULL;	// HW renderer only.
+
 	floorplane = frontsector->floorplane.PointOnSide(viewx, viewy, viewz) > 0 || // killough 3/7/98
 		frontsector->GetTexture(sector_t::floor) == skyflatnum ||
 		(skybox != NULL && skybox->bAlways) ||