Initial port of BSPX lights

0eeb410ce0

src/client/refresh/gl1/gl1_mesh.c

@@ -671,7 +671,14 @@ R_DrawAliasModel(entity_t *currententity, const model_t *currentmodel)
 	}
 	else
 	{
-		R_LightPoint(currententity, currententity->origin, shadelight);
+		if (r_worldmodel->grid)
+		{
+			BSPX_LightGridValue(r_worldmodel->grid, currententity->origin, shadelight);
+		}
+		else
+		{
+			R_LightPoint(currententity, currententity->origin, shadelight);
+		}
 
 		/* player lighting hack for communication back to server */
 		if (currententity->flags & RF_WEAPONMODEL)

src/client/refresh/gl1/gl1_model.c

@@ -915,6 +915,9 @@ Mod_LoadBrushModel(model_t *mod, const void *buffer, int modfilelen)
 		((int *)header)[i] = LittleLong(((int *)header)[i]);
 	}
 
+	/* check for BSPX extensions */
+	bspx_header = Mod_LoadBSPX(modfilelen, (byte*)header);
+
 	// calculate the needed hunksize from the lumps
 	int hunkSize = 0;
 	hunkSize += Mod_CalcLumpHunkSize(&header->lumps[LUMP_VERTEXES], sizeof(dvertex_t), sizeof(mvertex_t), 0);
@@ -955,12 +958,23 @@ Mod_LoadBrushModel(model_t *mod, const void *buffer, int modfilelen)
 	}
 	hunkSize += Mod_CalcLumpHunkSize(&header->lumps[LUMP_MODELS], sizeof(dmodel_t), sizeof(model_t), 0);
 
+	{
+		int lightgridsize = 0;
+
+		/* Get size of octree on disk, need to recheck real size */
+		if (Mod_LoadBSPXFindLump(bspx_header, "LIGHTGRID_OCTREE", &lightgridsize, mod_base))
+		{
+			hunkSize += lightgridsize * 4;
+		}
+	}
+
 	mod->extradata = Hunk_Begin(hunkSize);
 	mod->type = mod_brush;
 
-
-	/* check for BSPX extensions */
-	bspx_header = Mod_LoadBSPX(modfilelen, (byte*)header);
+	if (bspx_header)
+	{
+		mod->grid = BSPX_LightGridLoad(bspx_header, mod_base);
+	}
 
 	/* load into heap */
 	Mod_LoadVertexes(mod->name, &mod->vertexes, &mod->numvertexes, mod_base,
@@ -1258,3 +1272,220 @@ RI_EndRegistration(void)
 
 	R_FreeUnusedImages();
 }
+
+/* Need to clean */
+struct rctx_s {
+	const byte *data;
+	int ofs, size;
+};
+
+static byte ReadByte(struct rctx_s *ctx)
+{
+	if (ctx->ofs >= ctx->size)
+	{
+		ctx->ofs++;
+		return 0;
+	}
+	return ctx->data[ctx->ofs++];
+}
+
+static int ReadInt(struct rctx_s *ctx)
+{
+	int r = (int)ReadByte(ctx)<<0;
+		r|= (int)ReadByte(ctx)<<8;
+		r|= (int)ReadByte(ctx)<<16;
+		r|= (int)ReadByte(ctx)<<24;
+	return r;
+}
+
+static float ReadFloat(struct rctx_s *ctx)
+{
+	union {float f; int i;} u;
+	u.i = ReadInt(ctx);
+	return u.f;
+}
+
+bspxlightgrid_t*
+BSPX_LightGridLoad(const bspx_header_t *bspx_header, const byte *mod_base)
+{
+	vec3_t step, mins;
+	int size[3];
+	bspxlightgrid_t *grid;
+	unsigned int numstyles, numnodes, numleafs, rootnode;
+	unsigned int nodestart, leafsamps = 0, i, j, k, s;
+	struct bspxlgsamp_s *samp;
+	struct rctx_s ctx = {0};
+
+	ctx.data = Mod_LoadBSPXFindLump(bspx_header, "LIGHTGRID_OCTREE", &ctx.size, mod_base);
+	if (!ctx.data)
+	{
+		return NULL;
+	}
+
+	for (j = 0; j < 3; j++)
+		step[j] = ReadFloat(&ctx);
+	for (j = 0; j < 3; j++)
+		size[j] = ReadInt(&ctx);
+	for (j = 0; j < 3; j++)
+		mins[j] = ReadFloat(&ctx);
+
+	numstyles = ReadByte(&ctx);	//urgh, misaligned the entire thing
+	rootnode = ReadInt(&ctx);
+	numnodes = ReadInt(&ctx);
+	nodestart = ctx.ofs;
+	ctx.ofs += (3+8)*4*numnodes;
+	numleafs = ReadInt(&ctx);
+	for (i = 0; i < numleafs; i++)
+	{
+		unsigned int lsz[3];
+		ctx.ofs += 3*4;
+		for (j = 0; j < 3; j++)
+			lsz[j] = ReadInt(&ctx);
+		j = lsz[0]*lsz[1]*lsz[2];
+		leafsamps += j;
+		while (j --> 0)
+		{	//this loop is annonying, memcpy dreams...
+			s = ReadByte(&ctx);
+			if (s == 255)
+				continue;
+			ctx.ofs += s*4;
+		}
+	}
+
+	grid = Hunk_Alloc(sizeof(*grid) + sizeof(*grid->leafs)*numleafs + sizeof(*grid->nodes)*numnodes + sizeof(struct bspxlgsamp_s)*leafsamps);
+	memset(grid, 0xcc, sizeof(*grid) + sizeof(*grid->leafs)*numleafs + sizeof(*grid->nodes)*numnodes + sizeof(struct bspxlgsamp_s)*leafsamps);
+	grid->leafs = (void*)(grid+1);
+	grid->nodes = (void*)(grid->leafs + numleafs);
+	samp = (void*)(grid->nodes+numnodes);
+
+	for (j = 0; j < 3; j++)
+		grid->gridscale[j] = 1/step[j];	//prefer it as a multiply
+	VectorCopy(mins, grid->mins);
+	VectorCopy(size, grid->count);
+	grid->numnodes = numnodes;
+	grid->numleafs = numleafs;
+	grid->rootnode = rootnode;
+	(void)numstyles;
+
+	//rewind to the nodes. *sigh*
+	ctx.ofs = nodestart;
+	for (i = 0; i < numnodes; i++)
+	{
+		for (j = 0; j < 3; j++)
+			grid->nodes[i].mid[j] = ReadInt(&ctx);
+		for (j = 0; j < 8; j++)
+			grid->nodes[i].child[j] = ReadInt(&ctx);
+	}
+	ctx.ofs += 4;
+	for (i = 0; i < numleafs; i++)
+	{
+		for (j = 0; j < 3; j++)
+			grid->leafs[i].mins[j] = ReadInt(&ctx);
+		for (j = 0; j < 3; j++)
+			grid->leafs[i].size[j] = ReadInt(&ctx);
+
+		grid->leafs[i].rgbvalues = samp;
+
+		j = grid->leafs[i].size[0]*grid->leafs[i].size[1]*grid->leafs[i].size[2];
+		while (j --> 0)
+		{
+			s = ReadByte(&ctx);
+			if (s == 0xff)
+				memset(samp, 0xff, sizeof(*samp));
+			else
+			{
+				for (k = 0; k < s; k++)
+				{
+					if (k >= 4)
+						ReadInt(&ctx);
+					else
+					{
+						samp->map[k].style = ReadByte(&ctx);
+						samp->map[k].rgb[0] = ReadByte(&ctx);
+						samp->map[k].rgb[1] = ReadByte(&ctx);
+						samp->map[k].rgb[2] = ReadByte(&ctx);
+					}
+				}
+				for (; k < 4; k++)
+				{
+					samp->map[k].style = (byte)~0u;
+					samp->map[k].rgb[0] =
+					samp->map[k].rgb[1] =
+					samp->map[k].rgb[2] = 0;
+				}
+			}
+			samp++;
+		}
+	}
+
+	if (ctx.ofs != ctx.size)
+		grid = NULL;
+
+	return grid;
+}
+
+static int
+BSPX_LightGridSingleValue(bspxlightgrid_t *grid, int x, int y, int z, vec3_t res_diffuse)
+{
+	int i;
+	unsigned int node;
+	struct bspxlgsamp_s *samp;
+
+	node = grid->rootnode;
+	while (!(node & LGNODE_LEAF))
+	{
+		struct bspxlgnode_s *n;
+		if (node & LGNODE_MISSING)
+			return 0;	//failure
+		n = grid->nodes + node;
+		node = n->child[
+				((x>=n->mid[0])<<2)|
+				((y>=n->mid[1])<<1)|
+				((z>=n->mid[2])<<0)];
+	}
+
+	{
+		struct bspxlgleaf_s *leaf = &grid->leafs[node & ~LGNODE_LEAF];
+		x -= leaf->mins[0];
+		y -= leaf->mins[1];
+		z -= leaf->mins[2];
+		if (x >= leaf->size[0] ||
+			y >= leaf->size[1] ||
+			z >= leaf->size[2])
+			return 0;	//sample we're after is out of bounds...
+
+		i = x + leaf->size[0]*(y + leaf->size[1]*z);
+		samp = leaf->rgbvalues + i;
+
+		//no hdr support
+		for (i = 0; i < 4; i++)
+		{
+			if (samp->map[i].style == ((byte)(~0u)))
+				break;	//no more
+			res_diffuse[0] += samp->map[i].rgb[0] * r_newrefdef.lightstyles[samp->map[i].style].rgb[0] / 255.0;
+			res_diffuse[1] += samp->map[i].rgb[1] * r_newrefdef.lightstyles[samp->map[i].style].rgb[1] / 255.0;
+			res_diffuse[2] += samp->map[i].rgb[2] * r_newrefdef.lightstyles[samp->map[i].style].rgb[2] / 255.0;
+		}
+	}
+	return 1;
+}
+
+void
+BSPX_LightGridValue(bspxlightgrid_t *grid, const vec3_t point, vec3_t res_diffuse)
+{
+	int tile[3];
+	int i;
+	int s;
+
+	VectorSet(res_diffuse, 0, 0, 0);	//assume worst
+
+	for (i = 0; i < 3; i++)
+		tile[i] = (point[i] - grid->mins[i]) * grid->gridscale[i];
+
+	for (i = 0, s = 0; i < 8; i++)
+		s += BSPX_LightGridSingleValue(grid,	tile[0]+!!(i&1),
+												tile[1]+!!(i&2),
+												tile[2]+!!(i&4), res_diffuse);
+
+	VectorScale(res_diffuse, 1.0/s, res_diffuse);	//average the successful ones
+}

src/client/refresh/gl1/header/model.h

@@ -29,6 +29,41 @@
 
 #include "../../ref_model.h"
 
+typedef struct
+{
+	vec3_t gridscale;
+	unsigned int count[3];
+	vec3_t mins;
+	unsigned int styles;
+
+	unsigned int rootnode;
+
+	unsigned int numnodes;
+	struct bspxlgnode_s
+	{	//this uses an octtree to trim samples.
+		int mid[3];
+		unsigned int child[8];
+#define LGNODE_LEAF		(1u<<31)
+#define LGNODE_MISSING	(1u<<30)
+	} *nodes;
+	unsigned int numleafs;
+	struct bspxlgleaf_s
+	{
+		int mins[3];
+		int size[3];
+		struct bspxlgsamp_s
+		{
+			struct
+			{
+				byte style;
+				byte rgb[3];
+			} map[4];
+		} *rgbvalues;
+	} *leafs;
+} bspxlightgrid_t;
+bspxlightgrid_t* BSPX_LightGridLoad(const bspx_header_t *bspx_header, const byte *mod_base);
+void BSPX_LightGridValue(bspxlightgrid_t *grid, const vec3_t point, vec3_t res_diffuse);
+
 /* Whole model */
 
 typedef struct model_s
@@ -97,6 +132,9 @@ typedef struct model_s
 
 	// submodules
 	vec3_t		origin;	// for sounds or lights
+
+	/* octree  */
+	bspxlightgrid_t *grid;
 } model_t;
 
 void Mod_Init(void);