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, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.33:	+14 -12 lines
Log Message:	* empty log message *
#	Content
1	#ifndef VIEW_H
2	#define VIEW_H
3
4	#include <set>
5	#include <map>
6	#include <utility>
7
8	using namespace std;
9
10	#include "util.h"
11	#include "event.h"
12	#include "shader.h"
13
14	struct visibility_base
15	{
16	unsigned int generation; // freshness check
17	};
18
19	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	};
24
25	struct occ_query
26	{
27	struct view &ctx;
28	void *id;
29	GLuint count;
30
31	occ_query (view &ctx, void *id, GLuint count) : ctx(ctx), id(id), count(count) { };
32	};
33
34	typedef event_receiver<void, occ_query> recv_occ_query;
35
36	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	{
44	pass_type type;
45
46	struct light *l;
47
48	typedef map<struct material *, shader::program_object> matmap_t;
49	matmap_t matmap;
50
51	pass_data (light *l, pass_type type = LIGHTED) : l(l), type(type) { }
52	};
53
54	extern pass_data pass_depth; // the standard depth pass
55	extern pass_data pass_postdepth; // the standard post-depth pass
56
57	struct view
58	{
59	sector orig;
60	point p;
61	vec3 d, u;
62	GLfloat fov;
63	GLfloat z_near, z_far, c_far;
64	int w, h;
65	GLfloat pixfact; // how many pixels on screen are drawn by a unit length line, roughly
66	sector eorig; // orig of currently-rendered entity in relation to the camera
67
68	GLfloat gamma;
69
70	// only to be used by friends: TODO
71
72	GLfloat nz_far, nz_near, nc_far;
73	GLfloat diagfact; // bounding box border to depth factor
74	GLfloat perspfact; // perspfact * (1/depth)=> pixels
75
76	gl::matrix projection;
77
78	struct {
79	plane l, r, t, b, n, f;
80	cone c;
81	sphere s;
82	} frustum;
83
84	pass_data *pass;
85
86	set<const entity *> drawn; // TODO: put drawn info and octant+entity visibility info into vismap!
87
88	unsigned int generation;
89	typedef map<visible , visibility_base > visibility_map;
90	visibility_map vismap;
91
92	vector<octant *> vislist; // octants that want to be drawn
93
94	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	vector<oq_data> occ_queries;
102	void begin_occ_query (recv_occ_query &recv, void *id = 0);
103	void end_occ_query ();
104
105	void reset_projection ();
106
107	// public
108
109	void begin ();
110	void render (pass_data &pass);
111	void end ();
112
113	bool may_draw (const entity *e);
114
115	view ();
116	~view ();
117	};
118
119	struct light : view
120	{
121	// 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
126	// vertex shader
127	virtual void vsh () = 0;
128	// fragment shader
129	virtual void fsh () = 0;
130
131	virtual void enable ();
132	virtual void disable ();
133
134	protected:
135	shader::uniform_3f lightpos; // or direction
136	};
137
138	struct linear_light : light
139	{
140	colour c;
141	GLfloat intensity;
142	GLfloat radius;
143
144	void vsh ();
145	void fsh ();
146	};
147
148	#endif
149