1 //////////////////////////////////////////////////////////////////////
2 //
3 //                             Pixie
4 //
5 // Copyright � 1999 - 2003, Okan Arikan
6 //
7 // Contact: okan@cs.utexas.edu
8 //
9 //	This library is free software; you can redistribute it and/or
10 //	modify it under the terms of the GNU Lesser General Public
11 //	License as published by the Free Software Foundation; either
12 //	version 2.1 of the License, or (at your option) any later version.
13 //
14 //	This library is distributed in the hope that it will be useful,
15 //	but WITHOUT ANY WARRANTY; without even the implied warranty of
16 //	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 //	Lesser General Public License for more details.
18 //
19 //	You should have received a copy of the GNU Lesser General Public
20 //	License along with this library; if not, write to the Free Software
21 //	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
22 //
23 ///////////////////////////////////////////////////////////////////////
24 ///////////////////////////////////////////////////////////////////////
25 //
26 //  File				:	points.h
27 //  Classes				:	CPoints
28 //  Description			:	Points primitive
29 //
30 ////////////////////////////////////////////////////////////////////////
31 #ifndef POINTS_H
32 #define POINTS_H
33 
34 #include "common/global.h"
35 #include "ray.h"
36 #include "shading.h"
37 #include "surface.h"
38 #include "pl.h"
39 #include "refCounter.h"
40 
41 ///////////////////////////////////////////////////////////////////////
42 // Class				:	CPoints
43 // Description			:	Implements a points primitive
44 // Comments				:
45 class	CPoints : public CSurface {
46 
47 		///////////////////////////////////////////////////////////////////////
48 		// Class				:	CPointBase
49 		// Description			:	This class holds the memory for the points
50 		// Comments				:
51 		class CPointBase : public CRefCounter {
52 		public:
CPointBase()53 							CPointBase()	{	osCreateMutex(mutex);			}
~CPointBase()54 							~CPointBase()	{	variables->detach();	if (parameters != NULL) delete parameters;	if (vertex != NULL) delete vertex; osDeleteMutex(mutex);	}
55 
56 			float			*vertex;				// The vertex data for the points
57 			CParameter		*parameters;			// The parameters for the points
58 			CVertexData		*variables;				// The vertex data
59 			float			maxSize;				// The maximum size of the point in camera space
60 			TMutex			mutex;					// Holds the synchronization object
61 		};
62 public:
63 						CPoints(CAttributes *,CXform *,CPl *,int);
64 						CPoints(CAttributes *,CXform *,CPointBase *,int,const float **);
65 						~CPoints();
66 
67 						// Object interface
intersect(CShadingContext *,CRay *)68 		void			intersect(CShadingContext *,CRay *)	{	}
69 		void			dice(CShadingContext *);
70 		void			instantiate(CAttributes *,CXform *,CRendererContext *) const;
71 
72 						// Surface interface
73 		void			sample(int,int,float **,float ***,unsigned int &) const;
moving()74 		int				moving() const { return (pl != NULL ? (pl->data1 !=NULL) : base->variables->moving);	}
75 		void			interpolate(int,float **,float ***) const;
76 
77 
78 private:
79 		void			prep();
80 
81 		int				numPoints;				// The number of points
82 		CPl				*pl;					// The parameter list
83 
84 												// The variables below will only be ready after prep() is called
85 
86 		const float		**points;				// Entry points to points
87 
88 		CPointBase		*base;					// The point base
89 };
90 
91 #endif
92 
93