model.java

Jake2是一个Java 3D游戏引擎.

	        for (j = 0; j < 3; j++) { // spread the mins / maxs by a
	            // pixel
	            out.mins[j] = in.mins[j] - 1;
	            out.maxs[j] = in.maxs[j] + 1;
	            out.origin[j] = in.origin[j];
	        }
	        out.radius = RadiusFromBounds(out.mins, out.maxs);
	        out.headnode = in.headnode;
	        out.firstface = in.firstface;
	        out.numfaces = in.numfaces;
	    }
	}

	/*
	=================
	Mod_LoadEdges
	=================
	*/
	void Mod_LoadEdges (lump_t l)
	{
		medge_t[] edges;
		int i, count;

		if ( (l.filelen % medge_t.DISK_SIZE) != 0)
			Com.Error(Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);

		count = l.filelen / medge_t.DISK_SIZE;
		// out = Hunk_Alloc ( (count + 1) * sizeof(*out));	
		edges = new medge_t[count + 1];

		loadmodel.edges = edges;
		loadmodel.numedges = count;
		
		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);

		for ( i=0 ; i<count ; i++)
		{
			edges[i] = new medge_t(bb);
		}
	}

	/*
	=================
	Mod_LoadTexinfo
	=================
	*/
	void Mod_LoadTexinfo(lump_t l)
	{
		texinfo_t in;
		mtexinfo_t[] out;
		mtexinfo_t step;
		int i, j, count;
		int next;
		String name;

		if ((l.filelen % texinfo_t.SIZE) != 0)
			Com.Error (Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);

		count = l.filelen / texinfo_t.SIZE;
		// out = Hunk_Alloc ( count*sizeof(*out));
		out = new mtexinfo_t[count];
		for ( i=0 ; i<count ; i++) {
			out[i] = new mtexinfo_t();
		}

		loadmodel.texinfo = out;
		loadmodel.numtexinfo = count;
		
		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);

		for ( i=0 ; i<count ; i++) {
			
			in = new texinfo_t(bb);			
			out[i].vecs = in.vecs;
			out[i].flags = in.flags;
			next = in.nexttexinfo;
			if (next > 0)
				out[i].next = loadmodel.texinfo[next];
			else
				out[i].next = null;

			name = "textures/" +  in.texture + ".wal";

			out[i].image = GL_FindImage(name, it_wall);
			if (out[i].image == null) {
				VID.Printf(Defines.PRINT_ALL, "Couldn't load " + name + '\n');
				out[i].image = r_notexture;
			}
		}

		// count animation frames
		for (i=0 ; i<count ; i++) {
			out[i].numframes = 1;
			for (step = out[i].next ; (step != null) && (step != out[i]) ; step=step.next)
				out[i].numframes++;
		}
	}

	/*
	================
	CalcSurfaceExtents

	Fills in s.texturemins[] and s.extents[]
	================
	*/
	void CalcSurfaceExtents(msurface_t s)
	{
		float[] mins = {0, 0};
		float[] maxs = {0, 0};
		float val;

		int j, e;
		mvertex_t v;
		int[] bmins = {0, 0};
		int[] bmaxs = {0, 0};

		mins[0] = mins[1] = 999999;
		maxs[0] = maxs[1] = -99999;

		mtexinfo_t tex = s.texinfo;
	
		for (int i=0 ; i<s.numedges ; i++)
		{
			e = loadmodel.surfedges[s.firstedge+i];
			if (e >= 0)
				v = loadmodel.vertexes[loadmodel.edges[e].v[0]];
			else
				v = loadmodel.vertexes[loadmodel.edges[-e].v[1]];
		
			for (j=0 ; j<2 ; j++)
			{
				val = v.position[0] * tex.vecs[j][0] + 
					v.position[1] * tex.vecs[j][1] +
					v.position[2] * tex.vecs[j][2] +
					tex.vecs[j][3];
				if (val < mins[j])
					mins[j] = val;
				if (val > maxs[j])
					maxs[j] = val;
			}
		}

		for (int i=0 ; i<2 ; i++)
		{	
			bmins[i] = (int)Math.floor(mins[i]/16);
			bmaxs[i] = (int)Math.ceil(maxs[i]/16);

			s.texturemins[i] = (short)(bmins[i] * 16);
			s.extents[i] = (short)((bmaxs[i] - bmins[i]) * 16);

		}
	}

	/*
	=================
	Mod_LoadFaces
	=================
	*/
	void Mod_LoadFaces(lump_t l) {
	    
	    int i, surfnum;
	    int planenum, side;
	    int ti;
	    
	    if ((l.filelen % qfiles.dface_t.SIZE) != 0)
	        Com.Error(Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in "
	                + loadmodel.name);
	    
	    int count = l.filelen / qfiles.dface_t.SIZE;
	    // out = Hunk_Alloc ( count*sizeof(*out));
	    msurface_t[] outs = new msurface_t[count];
	    for (i = 0; i < count; i++) {
	        outs[i] = new msurface_t();
	    }
	    
	    loadmodel.surfaces = outs;
	    loadmodel.numsurfaces = count;
	    
	    ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
	    bb.order(ByteOrder.LITTLE_ENDIAN);
	    
	    currentmodel = loadmodel;
	    
	    GL_BeginBuildingLightmaps(loadmodel);
	    
	    qfiles.dface_t in;
	    msurface_t out;
	    
	    for (surfnum = 0; surfnum < count; surfnum++) {
	        in = new qfiles.dface_t(bb);
	        out = outs[surfnum];
	        out.firstedge = in.firstedge;
	        out.numedges = in.numedges;
	        out.flags = 0;
	        out.polys = null;
	        
	        planenum = in.planenum;
	        side = in.side;
	        if (side != 0)
	            out.flags |= Defines.SURF_PLANEBACK;
	        
	        out.plane = loadmodel.planes[planenum];
	        
	        ti = in.texinfo;
	        if (ti < 0 || ti >= loadmodel.numtexinfo)
	            Com.Error(Defines.ERR_DROP,
	            "MOD_LoadBmodel: bad texinfo number");
	        
	        out.texinfo = loadmodel.texinfo[ti];
	        
	        CalcSurfaceExtents(out);
	        
	        // lighting info
	        
	        for (i = 0; i < Defines.MAXLIGHTMAPS; i++)
	            out.styles[i] = in.styles[i];
	        
	        i = in.lightofs;
	        if (i == -1)
	            out.samples = null;
	        else {
	            ByteBuffer pointer = ByteBuffer.wrap(loadmodel.lightdata);
	            pointer.position(i);
	            pointer = pointer.slice();
	            pointer.mark();
	            out.samples = pointer; // subarray
	        }
	        
	        // set the drawing flags
	        
	        if ((out.texinfo.flags & Defines.SURF_WARP) != 0) {
	            out.flags |= Defines.SURF_DRAWTURB;
	            for (i = 0; i < 2; i++) {
	                out.extents[i] = 16384;
	                out.texturemins[i] = -8192;
	            }
	            GL_SubdivideSurface(out); // cut up polygon for warps
	        }
	        
	        // create lightmaps and polygons
	        if ((out.texinfo.flags & (Defines.SURF_SKY | Defines.SURF_TRANS33
	                | Defines.SURF_TRANS66 | Defines.SURF_WARP)) == 0)
	            GL_CreateSurfaceLightmap(out);
	        
	        if ((out.texinfo.flags & Defines.SURF_WARP) == 0)
	            GL_BuildPolygonFromSurface(out);
	        
	    }
	    GL_EndBuildingLightmaps();
	}


	/*
	=================
	Mod_SetParent
	=================
	*/
	void Mod_SetParent(mnode_t node, mnode_t parent)
	{
		node.parent = parent;
		if (node.contents != -1) return;
		Mod_SetParent(node.children[0], node);
		Mod_SetParent(node.children[1], node);
	}

	/*
	=================
	Mod_LoadNodes
	=================
	*/
	void Mod_LoadNodes(lump_t l)
	{
		int i, j, count, p;
		qfiles.dnode_t in;
		mnode_t[] out;

		if ((l.filelen % qfiles.dnode_t.SIZE) != 0)
			Com.Error(Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);
		
		count = l.filelen / qfiles.dnode_t.SIZE;
		// out = Hunk_Alloc ( count*sizeof(*out));	
		out = new mnode_t[count];

		loadmodel.nodes = out;
		loadmodel.numnodes = count;
		
		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);
		
		// initialize the tree array
		for ( i=0 ; i<count ; i++) out[i] = new mnode_t(); // do first before linking 

		// fill and link the nodes
		for ( i=0 ; i<count ; i++)
		{
			in = new qfiles.dnode_t(bb);
			for (j=0 ; j<3 ; j++)
			{
				out[i].mins[j] = in.mins[j];
				out[i].maxs[j] = in.maxs[j];
			}
	
			p = in.planenum;
			out[i].plane = loadmodel.planes[p];

			out[i].firstsurface = in.firstface;
			out[i].numsurfaces = in.numfaces;
			out[i].contents = -1;	// differentiate from leafs

			for (j=0 ; j<2 ; j++)
			{
				p = in.children[j];
				if (p >= 0)
					out[i].children[j] = loadmodel.nodes[p];
				else
					out[i].children[j] = loadmodel.leafs[-1 - p]; // mleaf_t extends mnode_t
			}
		}
	
		Mod_SetParent(loadmodel.nodes[0], null);	// sets nodes and leafs
	}

	/*
	=================
	Mod_LoadLeafs
	=================
	*/
	void Mod_LoadLeafs(lump_t l)
	{
		qfiles.dleaf_t in;
		mleaf_t[] out;
		int i, j, count, p;

		if ((l.filelen % qfiles.dleaf_t.SIZE) != 0)
			Com.Error (Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);

		count = l.filelen / qfiles.dleaf_t.SIZE;
		// out = Hunk_Alloc ( count*sizeof(*out));
		out = new mleaf_t[count];	

		loadmodel.leafs = out;
		loadmodel.numleafs = count;
		
		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);

		for ( i=0 ; i<count ; i++)
		{
			in = new qfiles.dleaf_t(bb);
			out[i] = new mleaf_t();
			for (j=0 ; j<3 ; j++)
			{
				out[i].mins[j] = in.mins[j];
				out[i].maxs[j] = in.maxs[j];

			}

			out[i].contents = in.contents;
			out[i].cluster = in.cluster;
			out[i].area = in.area;

			out[i].setMarkSurface(in.firstleafface, loadmodel.marksurfaces);
			out[i].nummarksurfaces = in.numleaffaces;
		}	
	}


	/*
	=================
	Mod_LoadMarksurfaces
	=================
	*/
	void Mod_LoadMarksurfaces(lump_t l)
	{	
		int i, j, count;

		msurface_t[] out; 

		if ((l.filelen % Defines.SIZE_OF_SHORT) != 0)
			Com.Error(Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);
		count = l.filelen / Defines.SIZE_OF_SHORT;
		// out = Hunk_Alloc ( count*sizeof(*out));	
		out = new msurface_t[count];

		loadmodel.marksurfaces = out;
		loadmodel.nummarksurfaces = count;

		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);

		for ( i=0 ; i<count ; i++)
		{
			j = bb.getShort();
			if (j < 0 ||  j >= loadmodel.numsurfaces)
				Com.Error(Defines.ERR_DROP, "Mod_ParseMarksurfaces: bad surface number");

			out[i] = loadmodel.surfaces[j];
		}
	}


	/*
	=================
	Mod_LoadSurfedges
	=================
	*/
	void Mod_LoadSurfedges(lump_t l)
	{	
		int i, count;
		int[] offsets;
	
		if ( (l.filelen % Defines.SIZE_OF_INT) != 0)
			Com.Error (Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);

		count = l.filelen / Defines.SIZE_OF_INT;
		if (count < 1 || count >= Defines.MAX_MAP_SURFEDGES)
			Com.Error (Defines.ERR_DROP, "MOD_LoadBmodel: bad surfedges count in " + loadmodel.name + ": " + count);

		offsets = new int[count];

		loadmodel.surfedges = offsets;
		loadmodel.numsurfedges = count;

		ByteBuffer bb = ByteBuffer.wrap(mod_base, l.fileofs, l.filelen);
		bb.order(ByteOrder.LITTLE_ENDIAN);

		for ( i=0 ; i<count ; i++) offsets[i] = bb.getInt();
	}


	/*
	=================
	Mod_LoadPlanes
	=================
	*/
	void Mod_LoadPlanes(lump_t l)
	{
		int i, j;
		cplane_t[] out;
		qfiles.dplane_t in;
		int count;
		int bits;

		if ((l.filelen % qfiles.dplane_t.SIZE) != 0)
			Com.Error(Defines.ERR_DROP, "MOD_LoadBmodel: funny lump size in " + loadmodel.name);

		count = l.filelen / qfiles.dplane_t.SIZE;
		// out = Hunk_Alloc ( count*2*sizeof(*out));
		out = new cplane_t[count * 2];
		for (i = 0; i < count; i++) {
		    out[i] = new cplane_t();
		}