Add light probe support for sprites

src/g_level.cpp

@@ -2283,3 +2283,26 @@ void FLevelLocals::SetMusic()
 	S_ChangeMusic(Music, musicorder);
 }
 
+void FLevelLocals::GetLightProbeLight(float x, float y, float z, float* out)
+{
+	out[0] = out[1] = out[2] = 0.f;
+
+	// To do: Pretty stupid algorithm. Use something better once we confirmed this looks alright.
+
+	float lastdist = 0.0f;
+	for (unsigned int i = 0; i < LightProbes.Size(); i++)
+	{
+		const LightProbe& probe = LightProbes[i];
+		float dx = probe.X - x;
+		float dy = probe.Y - y;
+		float dz = probe.Z - z;
+		float dist = dx * dx + dy * dy + dz * dz;
+		if (i == 0 || dist < lastdist)
+		{
+			out[0] = probe.Red;
+			out[1] = probe.Green;
+			out[2] = probe.Blue;
+			lastdist = dist;
+		}
+	}
+}

src/g_levellocals.h

@@ -429,6 +429,7 @@ public:
 	
 	void SetMusic();
 
+	void GetLightProbeLight(float x, float y, float z, float* out);
 
 	TArray<vertex_t> vertexes;
 	TArray<sector_t> sectors;
@@ -457,6 +458,7 @@ public:
 	int LMTextureCount = 0;
 	int LMTextureSize = 0;
 	TArray<uint16_t> LMTextureData;
+	TArray<LightProbe> LightProbes;
 
 	// Portal information.
 	FDisplacementTable Displacements;

src/gamedata/r_defs.h

@@ -1687,6 +1687,12 @@ struct LightmapSurface
 	float *TexCoords;
 };
 
+struct LightProbe
+{
+	float X, Y, Z;
+	float Red, Green, Blue;
+};
+
 //
 // OTHER TYPES
 //

src/maploader/maploader.cpp

@@ -3340,6 +3340,7 @@ void MapLoader::LoadLightmap(MapData *map)
 	uint16_t numTextures = fr.ReadUInt16();
 	uint32_t numSurfaces = fr.ReadUInt32();
 	uint32_t numTexCoords = fr.ReadUInt32();
+	uint32_t numLightProbes = fr.ReadUInt32();
 	uint32_t numTexBytes = numTextures * textureSize * textureSize * 3 * 2;
 
 	if (numSurfaces == 0 || numTexCoords == 0 || numTexBytes == 0)
@@ -3347,6 +3348,12 @@ void MapLoader::LoadLightmap(MapData *map)
 
 	Level->LMTexCoords.Resize(numTexCoords * 2);
 
+	if (numLightProbes > 0)
+	{
+		Level->LightProbes.Resize(numLightProbes);
+		fr.Read(&Level->LightProbes[0], sizeof(LightProbe) * numLightProbes);
+	}
+
 	// Allocate room for all surfaces
 
 	unsigned int allSurfaces = 0;

src/rendering/hwrenderer/scene/hw_spritelight.cpp

@@ -57,7 +57,8 @@ void HWDrawInfo::GetDynSpriteLight(AActor *self, float x, float y, float z, FLig
 	float frac, lr, lg, lb;
 	float radius;
 	
-	out[0] = out[1] = out[2] = 0.f;
+	self->Level->GetLightProbeLight(x, y, z, out);
+
 	// Go through both light lists
 	while (node)
 	{