libgender/view.h

#ifndef VIEW_H
#define VIEW_H

#include <set>
#include <map>
#include <utility>

using namespace std;

#include "util.h"
#include "event.h"
#include "shader.h"

struct visibility_base
{
  unsigned int generation; // freshness check
};

struct visible {
  visibility_base *get_visibility (view &ctx);
  virtual visibility_base *new_visibility () = 0;
  virtual void clear_visibility (visibility_base *vs) = 0;
};

struct occ_query
{
  struct view &ctx;
  void *id;
  GLuint count;

  occ_query (view &ctx, void *id, GLuint count) : ctx(ctx), id(id), count(count) { };
};

typedef event_receiver<void, occ_query> recv_occ_query;

enum pass_type {
  DEPTH,        // mandatory, render depth only
  POSTDEPTH,    // mandatory, occ tests or ignored
  LIGHTED,    // optional, render faces in full glory
};

struct pass_data
{
  pass_type type;

  struct light *l;

  typedef map<struct material *, shader::program_object> matmap_t;
  matmap_t matmap;

  pass_data (light *l, pass_type type = LIGHTED) : l(l), type(type) { }
};

extern pass_data pass_depth; // the standard depth pass
extern pass_data pass_postdepth; // the standard post-depth pass

struct view
{
  sector orig;
  point p;
  vec3 d, u;
  GLfloat fov;
  GLfloat z_near, z_far, c_far;
  int w, h;
  GLfloat pixfact; // how many pixels on screen are drawn by a unit length line, *roughly*
  sector eorig; // orig of currently-rendered entity in relation to the camera

  GLfloat gamma;

  // only to be used by friends: TODO

  GLfloat nz_far, nz_near, nc_far;
  GLfloat diagfact; // bounding box border to depth factor
  GLfloat perspfact; // perspfact * (1/depth)=> pixels

  gl::matrix projection;

  struct {
    plane l, r, t, b, n, f;
    cone c;
    sphere s;
  } frustum;

  pass_data *pass;

  set<const entity *> drawn; // TODO: put drawn info and octant+entity visibility info into vismap!

  unsigned int generation;
  typedef map<visible *, visibility_base *> visibility_map;
  visibility_map vismap;

  vector<octant *> vislist; // octants that want to be drawn

  struct oq_data {
    recv_occ_query *recv;
    GLint id;
    void *data;

    oq_data (recv_occ_query *recv, GLint id, void *data) : recv(recv), id(id), data(data) { };
  };
  vector<oq_data> occ_queries;
  void begin_occ_query (recv_occ_query &recv, void *id = 0);
  void end_occ_query ();

  void reset_projection ();

  // public
  
  void begin ();
  void render (pass_data &pass);
  void end ();

  bool may_draw (const entity *e);

  view ();
  ~view ();
};

struct light : view
{
  // the following variables are valid in the fragment shader as well as in the vertex shader
  bool has_lightvec;           // is a light vector available?
  shader::temp_3f sh_lightvec; // not defined unless has_lightvec is true
  shader::temp_3f sh_colour;   // always available for any light

  // vertex shader
  virtual void vsh () = 0;
  // fragment shader
  virtual void fsh () = 0;

  virtual void enable ();
  virtual void disable ();

protected:
  shader::uniform_3f lightpos; // or direction
};

struct linear_light : light
{
  colour c;
  GLfloat intensity;
  GLfloat radius;

  void vsh ();
  void fsh ();
};

#endif

Revision:	1.34
Committed:	Sun Nov 7 03:28:20 2004 UTC (19 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.33:	+14 -12 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef VIEW_H
2			#define VIEW_H
3
4			#include <set>
5	root	1.4	#include <map>
6	root	1.17	#include <utility>
7	root	1.1
8			using namespace std;
9
10			#include "util.h"
11	root	1.17	#include "event.h"
12	root	1.32	#include "shader.h"
13	root	1.1
14	root	1.22	struct visibility_base
15	root	1.20	{
16	root	1.22	unsigned int generation; // freshness check
17			};
18	root	1.12
19	root	1.22	struct visible {
20			visibility_base *get_visibility (view &ctx);
21			virtual visibility_base *new_visibility () = 0;
22			virtual void clear_visibility (visibility_base *vs) = 0;
23	root	1.12	};
24
25	root	1.20	struct occ_query
26			{
27	root	1.26	struct view &ctx;
28	root	1.22	void *id;
29	root	1.26	GLuint count;
30	root	1.17
31	root	1.26	occ_query (view &ctx, void *id, GLuint count) : ctx(ctx), id(id), count(count) { };
32	root	1.17	};
33
34			typedef event_receiver<void, occ_query> recv_occ_query;
35
36	root	1.34	enum pass_type {
37			DEPTH, // mandatory, render depth only
38			POSTDEPTH, // mandatory, occ tests or ignored
39			LIGHTED, // optional, render faces in full glory
40			};
41
42			struct pass_data
43	root	1.31	{
44	root	1.34	pass_type type;
45
46	root	1.31	struct light *l;
47
48	root	1.32	typedef map<struct material *, shader::program_object> matmap_t;
49			matmap_t matmap;
50
51	root	1.34	pass_data (light *l, pass_type type = LIGHTED) : l(l), type(type) { }
52	root	1.31	};
53
54	root	1.34	extern pass_data pass_depth; // the standard depth pass
55			extern pass_data pass_postdepth; // the standard post-depth pass
56	root	1.31
57	root	1.20	struct view
58			{
59	root	1.2	sector orig;
60			point p;
61			vec3 d, u;
62	root	1.13	GLfloat fov;
63	root	1.19	GLfloat z_near, z_far, c_far;
64	root	1.2	int w, h;
65	root	1.21	GLfloat pixfact; // how many pixels on screen are drawn by a unit length line, roughly
66	root	1.30	sector eorig; // orig of currently-rendered entity in relation to the camera
67	root	1.2
68	root	1.13	GLfloat gamma;
69	root	1.4
70	root	1.17	// only to be used by friends: TODO
71	root	1.5
72	root	1.28	GLfloat nz_far, nz_near, nc_far;
73	root	1.17	GLfloat diagfact; // bounding box border to depth factor
74	root	1.21	GLfloat perspfact; // perspfact * (1/depth)=> pixels
75	root	1.13
76	root	1.25	gl::matrix projection;
77	root	1.9
78	root	1.5	struct {
79			plane l, r, t, b, n, f;
80	root	1.27	cone c;
81			sphere s;
82	root	1.5	} frustum;
83	root	1.14
84	root	1.34	pass_data *pass;
85	root	1.26
86			set<const entity *> drawn; // TODO: put drawn info and octant+entity visibility info into vismap!
87	root	1.4
88			unsigned int generation;
89	root	1.22	typedef map<visible , visibility_base > visibility_map;
90			visibility_map vismap;
91	root	1.17
92	root	1.24	vector<octant *> vislist; // octants that want to be drawn
93	root	1.17
94	root	1.22	struct oq_data {
95			recv_occ_query *recv;
96			GLint id;
97			void *data;
98
99			oq_data (recv_occ_query recv, GLint id, void data) : recv(recv), id(id), data(data) { };
100			};
101	root	1.17	vector<oq_data> occ_queries;
102	root	1.22	void begin_occ_query (recv_occ_query &recv, void *id = 0);
103	root	1.17	void end_occ_query ();
104	root	1.13
105			void reset_projection ();
106
107			// public
108
109			void begin ();
110	root	1.34	void render (pass_data &pass);
111	root	1.13	void end ();
112	root	1.1
113	root	1.15	bool may_draw (const entity *e);
114	root	1.1
115	root	1.12	view ();
116			~view ();
117	root	1.31	};
118
119			struct light : view
120			{
121	root	1.33	// the following variables are valid in the fragment shader as well as in the vertex shader
122			bool has_lightvec; // is a light vector available?
123			shader::temp_3f sh_lightvec; // not defined unless has_lightvec is true
124			shader::temp_3f sh_colour; // always available for any light
125	root	1.32
126			// vertex shader
127			virtual void vsh () = 0;
128			// fragment shader
129	root	1.33	virtual void fsh () = 0;
130	root	1.32
131			virtual void enable ();
132			virtual void disable ();
133	root	1.33
134			protected:
135			shader::uniform_3f lightpos; // or direction
136	root	1.32	};
137
138			struct linear_light : light
139			{
140	root	1.31	colour c;
141			GLfloat intensity;
142			GLfloat radius;
143	root	1.32
144			void vsh ();
145	root	1.33	void fsh ();
146	root	1.1	};
147	root	1.7
148	root	1.1	#endif
149