Add corona actor

src/CMakeLists.txt

@@ -920,6 +920,7 @@ set (PCH_SOURCES
 	playsim/mapthinkers/dsectoreffect.cpp
 	playsim/a_pickups.cpp
 	playsim/a_action.cpp
+	playsim/a_corona.cpp
 	playsim/a_decals.cpp
 	playsim/a_dynlight.cpp
 	playsim/a_flashfader.cpp

src/namedef_custom.h

@@ -863,3 +863,5 @@ xx(lm_sampledist_ceiling)
 xx(lm_suncolor)
 xx(lm_sampledistance)
 xx(lm_gridsize)
+
+xx(Corona)

src/playsim/a_corona.cpp

@@ -0,0 +1,32 @@
+/*
+**  Light Coronas
+**  Copyright (c) 2022 Nash Muhandes, Magnus Norddahl
+**
+**  This software is provided 'as-is', without any express or implied
+**  warranty.  In no event will the authors be held liable for any damages
+**  arising from the use of this software.
+**
+**  Permission is granted to anyone to use this software for any purpose,
+**  including commercial applications, and to alter it and redistribute it
+**  freely, subject to the following restrictions:
+**
+**  1. The origin of this software must not be misrepresented; you must not
+**     claim that you wrote the original software. If you use this software
+**     in a product, an acknowledgment in the product documentation would be
+**     appreciated but is not required.
+**  2. Altered source versions must be plainly marked as such, and must not be
+**     misrepresented as being the original software.
+**  3. This notice may not be removed or altered from any source distribution.
+*/
+
+
+#include "actor.h"
+#include "a_corona.h"
+#include "a_dynlight.h"
+
+IMPLEMENT_CLASS(ACorona, false, false)
+
+void ACorona::Tick()
+{
+	Super::Tick();
+}

src/playsim/a_corona.h

@@ -0,0 +1,38 @@
+/*
+**  Light Coronas
+**  Copyright (c) 2022 Nash Muhandes, Magnus Norddahl
+**
+**  This software is provided 'as-is', without any express or implied
+**  warranty.  In no event will the authors be held liable for any damages
+**  arising from the use of this software.
+**
+**  Permission is granted to anyone to use this software for any purpose,
+**  including commercial applications, and to alter it and redistribute it
+**  freely, subject to the following restrictions:
+**
+**  1. The origin of this software must not be misrepresented; you must not
+**     claim that you wrote the original software. If you use this software
+**     in a product, an acknowledgment in the product documentation would be
+**     appreciated but is not required.
+**  2. Altered source versions must be plainly marked as such, and must not be
+**     misrepresented as being the original software.
+**  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#pragma once
+
+#include "actor.h"
+
+EXTERN_CVAR(Bool, gl_coronas)
+
+class AActor;
+
+class ACorona : public AActor
+{
+	DECLARE_CLASS(ACorona, AActor)
+
+public:
+	void Tick();
+
+	float CoronaFade = 0.0f;
+};

src/rendering/hwrenderer/scene/hw_drawinfo.cpp

@@ -44,6 +44,8 @@
 #include "hw_vrmodes.h"
 #include "hw_clipper.h"
 #include "v_draw.h"
+#include "a_corona.h"
+#include "texturemanager.h"
 
 EXTERN_CVAR(Float, r_visibility)
 CVAR(Bool, gl_bandedswlight, false, CVAR_ARCHIVE)
@@ -55,6 +57,8 @@ CVAR(Bool, gl_texture, true, 0)
 CVAR(Float, gl_mask_threshold, 0.5f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 CVAR(Float, gl_mask_sprite_threshold, 0.5f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 
+CVAR(Bool, gl_coronas, true, CVAR_ARCHIVE);
+
 sector_t * hw_FakeFlat(sector_t * sec, sector_t * dest, area_t in_area, bool back);
 
 //==========================================================================
@@ -165,6 +169,7 @@ void HWDrawInfo::StartScene(FRenderViewpoint &parentvp, HWViewpointUniforms *uni
 
 	for (int i = 0; i < GLDL_TYPES; i++) drawlists[i].Reset();
 	hudsprites.Clear();
+	Coronas.Clear();
 	vpIndex = 0;
 
 	// Fullbright information needs to be propagated from the main view.
@@ -569,6 +574,128 @@ void HWDrawInfo::RenderPortal(HWPortal *p, FRenderState &state, bool usestencil)
 
 }
 
+void HWDrawInfo::DrawCorona(FRenderState& state, ACorona* corona, double dist)
+{
+	spriteframe_t* sprframe = &SpriteFrames[sprites[corona->sprite].spriteframes + (size_t)corona->SpawnState->GetFrame()];
+	FTextureID patch = sprframe->Texture[0];
+	if (!patch.isValid()) return;
+	auto tex = TexMan.GetGameTexture(patch, false);
+	if (!tex || !tex->isValid()) return;
+
+	// Project the corona sprite center
+	FVector4 worldPos((float)corona->X(), (float)corona->Z(), (float)corona->Y(), 1.0f);
+	FVector4 viewPos, clipPos;
+	VPUniforms.mViewMatrix.multMatrixPoint(&worldPos[0], &viewPos[0]);
+	VPUniforms.mProjectionMatrix.multMatrixPoint(&viewPos[0], &clipPos[0]);
+	if (clipPos.W < -1.0f) return; // clip z nearest
+	float halfViewportWidth = screen->GetWidth() * 0.5f;
+	float halfViewportHeight = screen->GetHeight() * 0.5f;
+	float invW = 1.0f / clipPos.W;
+	float screenX = halfViewportWidth + clipPos.X * invW * halfViewportWidth;
+	float screenY = halfViewportHeight - clipPos.Y * invW * halfViewportHeight;
+
+	float alpha = corona->CoronaFade * float(corona->Alpha);
+
+	// distance-based fade - looks better IMO
+	float distNearFadeStart = float(corona->RenderRadius()) * 0.1f;
+	float distFarFadeStart = float(corona->RenderRadius()) * 0.5f;
+	float distFade = 1.0f;
+
+	if (float(dist) < distNearFadeStart)
+		distFade -= abs(((float(dist) - distNearFadeStart) / distNearFadeStart));
+	else if (float(dist) >= distFarFadeStart)
+		distFade -= (float(dist) - distFarFadeStart) / distFarFadeStart;
+
+	alpha *= distFade;
+
+	state.SetColorAlpha(0xffffff, alpha, 0);
+	if (isSoftwareLighting()) state.SetSoftLightLevel(255);
+	else state.SetNoSoftLightLevel();
+
+	state.SetLightIndex(-1);
+	state.SetRenderStyle(corona->RenderStyle);
+	state.SetTextureMode(corona->RenderStyle);
+
+	state.SetMaterial(tex, UF_Sprite, CTF_Expand, CLAMP_XY_NOMIP, 0, 0);
+
+	float scale = screen->GetHeight() / 1000.0f;
+	float tileWidth = corona->Scale.X * tex->GetDisplayWidth() * scale;
+	float tileHeight = corona->Scale.Y * tex->GetDisplayHeight() * scale;
+	float x0 = screenX - tileWidth, y0 = screenY - tileHeight;
+	float x1 = screenX + tileWidth, y1 = screenY + tileHeight;
+
+	float u0 = 0.0f, v0 = 0.0f;
+	float u1 = 1.0f, v1 = 1.0f;
+
+	auto vert = screen->mVertexData->AllocVertices(4);
+	auto vp = vert.first;
+	unsigned int vertexindex = vert.second;
+
+	vp[0].Set(x0, y0, 1.0f, u0, v0);
+	vp[1].Set(x1, y0, 1.0f, u1, v0);
+	vp[2].Set(x0, y1, 1.0f, u0, v1);
+	vp[3].Set(x1, y1, 1.0f, u1, v1);
+
+	state.Draw(DT_TriangleStrip, vertexindex, 4);
+}
+
+static ETraceStatus CheckForViewpointActor(FTraceResults& res, void* userdata)
+{
+	FRenderViewpoint* data = (FRenderViewpoint*)userdata;
+	if (res.HitType == TRACE_HitActor && res.Actor && res.Actor == data->ViewActor)
+	{
+		return TRACE_Skip;
+	}
+
+	return TRACE_Stop;
+}
+
+
+void HWDrawInfo::DrawCoronas(FRenderState& state)
+{
+	state.EnableDepthTest(false);
+	state.SetDepthMask(false);
+
+	HWViewpointUniforms vp = VPUniforms;
+	vp.mViewMatrix.loadIdentity();
+	vp.mProjectionMatrix = VRMode::GetVRMode(true)->GetHUDSpriteProjection();
+	screen->mViewpoints->SetViewpoint(state, &vp);
+
+	float timeElapsed = (screen->FrameTime - LastFrameTime) / 1000.0f;
+	LastFrameTime = screen->FrameTime;
+
+	for (ACorona* corona : Coronas)
+	{
+		DVector3 direction = Viewpoint.Pos - corona->Pos();
+		double dist = direction.Length();
+
+		// skip coronas that are too far
+		if (dist > corona->RenderRadius())
+			continue;
+
+		static const float fadeSpeed = 9.0f;
+
+		direction.MakeUnit();
+		FTraceResults results;
+		if (!Trace(corona->Pos(), corona->Sector, direction, dist, MF_SOLID, ML_BLOCKEVERYTHING, corona, results, 0, CheckForViewpointActor, &Viewpoint))
+		{
+			corona->CoronaFade = std::min(corona->CoronaFade + timeElapsed * fadeSpeed, 1.0f);
+		}
+		else
+		{
+			corona->CoronaFade = std::max(corona->CoronaFade - timeElapsed * fadeSpeed, 0.0f);
+		}
+
+		if (corona->CoronaFade > 0.0f)
+			DrawCorona(state, corona, dist);
+	}
+
+	state.SetTextureMode(TM_NORMAL);
+	screen->mViewpoints->Bind(state, vpIndex);
+	state.EnableDepthTest(true);
+	state.SetDepthMask(true);
+}
+
 //-----------------------------------------------------------------------------
 //
 // Draws player sprites and color blend
@@ -580,6 +707,11 @@ void HWDrawInfo::EndDrawScene(sector_t * viewsector, FRenderState &state)
 {
 	state.EnableFog(false);
 
+	if (gl_coronas && Coronas.Size() > 0)
+	{
+		DrawCoronas(state);
+	}
+
 	// [BB] HUD models need to be rendered here. 
 	const bool renderHUDModel = IsHUDModelForPlayerAvailable(players[consoleplayer].camera->player);
 	if (renderHUDModel)

src/rendering/hwrenderer/scene/hw_drawinfo.h

@@ -29,6 +29,7 @@ class IShadowMap;
 struct particle_t;
 struct FDynLightData;
 struct HUDSprite;
+class ACorona;
 class Clipper;
 class HWPortal;
 class FFlatVertexBuffer;
@@ -150,6 +151,8 @@ struct HWDrawInfo
 	TArray<HWPortal *> Portals;
 	TArray<HWDecal *> Decals[2];	// the second slot is for mirrors which get rendered in a separate pass.
 	TArray<HUDSprite> hudsprites;	// These may just be stored by value.
+	TArray<ACorona*> Coronas;
+	uint64_t LastFrameTime = 0;
 
 	TArray<MissingTextureInfo> MissingUpperTextures;
 	TArray<MissingTextureInfo> MissingLowerTextures;
@@ -300,6 +303,8 @@ struct HWDrawInfo
 
 	void DrawDecals(FRenderState &state, TArray<HWDecal *> &decals);
 	void DrawPlayerSprites(bool hudModelStep, FRenderState &state);
+	void DrawCoronas(FRenderState& state);
+	void DrawCorona(FRenderState& state, ACorona* corona, double dist);
 
 	void ProcessLowerMinisegs(TArray<seg_t *> &lowersegs);
     void AddSubsectorToPortal(FSectorPortalGroup *portal, subsector_t *sub);

src/rendering/hwrenderer/scene/hw_sprites.cpp

@@ -33,6 +33,7 @@
 #include "r_sky.h"
 #include "r_utility.h"
 #include "a_pickups.h"
+#include "a_corona.h"
 #include "d_player.h"
 #include "g_levellocals.h"
 #include "events.h"
@@ -703,6 +704,12 @@ void HWSprite::Process(HWDrawInfo *di, AActor* thing, sector_t * sector, area_t
 		return;
 	}
 
+	if (thing->IsKindOf(NAME_Corona))
+	{
+		di->Coronas.Push(static_cast<ACorona*>(thing));
+		return;
+	}
+
 	const auto &vp = di->Viewpoint;
 	AActor *camera = vp.camera;
 

wadsrc/static/menudef.txt

@@ -2637,6 +2637,7 @@ OptionMenu "OpenGLOptions" protected
 	Option "$GLPREFMNU_SPRBILLFACECAMERA",		gl_billboard_faces_camera,		"OnOff"
 	Option "$GLPREFMNU_PARTICLESTYLE",			gl_particles_style,				"Particles"
 	Option "$GLPREFMNU_RENDERQUALITY",			gl_seamless,					"Precision"
+	Option "$GLPREFMNU_CORONAS",				gl_coronas,						"OnOff"
 	StaticText " "
 	Slider "$GLPREFMNU_MENUBLUR",				gl_menu_blur, 0, 5.0, 0.5, 2
 	StaticText " "

wadsrc/static/zscript.txt

@@ -92,6 +92,7 @@ version "4.9"
 #include "zscript/actors/shared/fastprojectile.zs"
 #include "zscript/actors/shared/randomspawner.zs"
 #include "zscript/actors/shared/dynlights.zs"
+#include "zscript/actors/shared/corona.zs"
 
 #include "zscript/actors/doom/doomplayer.zs"
 #include "zscript/actors/doom/possessed.zs"

wadsrc/static/zscript/actors/shared/corona.zs

@@ -0,0 +1,7 @@
+class Corona : Actor native
+{
+	Default
+	{
+		RenderRadius 1024.0;
+	}
+}