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"

extern struct skybox *world_skybox;

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) { };
};

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

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

  pass_data *pass;
  bool first_lighted; // first lighted 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
  vector<octant *> postdepthlist; // octants that want to checked

  struct oq_data {
    GLint id;
    int *res; // not GLuint because -1 is so nice a flag

    oq_data (GLint id, int &res) : id(id), res(&res) { };
  };
  vector<oq_data> occ_queries;
  void begin_occ_query (int &res);
  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 ();

  int stat1; //D
  int stat2; //D
};

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

  virtual void enable (view &ctx);
  virtual void disable (view &ctx);

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

protected:
  shader::varying_3f lightvec;
  shader::varying_1f camdist;
  shader::uniform_3f lightpos; // or direction
};

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

  void enable (view &ctx);
  void disable (view &ctx);

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

#endif

Revision:	1.41
Committed:	Thu Aug 11 19:28:45 2005 UTC (18 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.40:	+3 -6 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	1.40	extern struct skybox *world_skybox;
15
16	root	1.22	struct visibility_base
17	root	1.20	{
18	root	1.22	unsigned int generation; // freshness check
19			};
20	root	1.12
21	root	1.22	struct visible {
22			visibility_base *get_visibility (view &ctx);
23			virtual visibility_base *new_visibility () = 0;
24			virtual void clear_visibility (visibility_base *vs) = 0;
25	root	1.12	};
26
27	root	1.20	struct occ_query
28			{
29	root	1.26	struct view &ctx;
30	root	1.22	void *id;
31	root	1.26	GLuint count;
32	root	1.17
33	root	1.26	occ_query (view &ctx, void *id, GLuint count) : ctx(ctx), id(id), count(count) { };
34	root	1.17	};
35
36	root	1.34	enum pass_type {
37			DEPTH, // mandatory, render depth only
38			POSTDEPTH, // mandatory, occ tests or ignored
39	root	1.35	LIGHTED, // optional, render faces in full glory
40	root	1.34	};
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	1.5	struct {
77			plane l, r, t, b, n, f;
78	root	1.27	cone c;
79			sphere s;
80	root	1.5	} frustum;
81	root	1.14
82	root	1.34	pass_data *pass;
83	root	1.35	bool first_lighted; // first lighted pass
84	root	1.26
85			set<const entity *> drawn; // TODO: put drawn info and octant+entity visibility info into vismap!
86	root	1.4
87			unsigned int generation;
88	root	1.22	typedef map<visible , visibility_base > visibility_map;
89			visibility_map vismap;
90	root	1.17
91	root	1.24	vector<octant *> vislist; // octants that want to be drawn
92	root	1.37	vector<octant *> postdepthlist; // octants that want to checked
93	root	1.17
94	root	1.22	struct oq_data {
95			GLint id;
96	root	1.41	int *res; // not GLuint because -1 is so nice a flag
97	root	1.22
98	root	1.41	oq_data (GLint id, int &res) : id(id), res(&res) { };
99	root	1.22	};
100	root	1.17	vector<oq_data> occ_queries;
101	root	1.41	void begin_occ_query (int &res);
102	root	1.17	void end_occ_query ();
103	root	1.13
104			void reset_projection ();
105
106			// public
107
108			void begin ();
109	root	1.34	void render (pass_data &pass);
110	root	1.13	void end ();
111	root	1.1
112	root	1.15	bool may_draw (const entity *e);
113	root	1.1
114	root	1.12	view ();
115			~view ();
116	root	1.36
117			int stat1; //D
118			int stat2; //D
119	root	1.31	};
120
121			struct light : view
122			{
123	root	1.33	// the following variables are valid in the fragment shader as well as in the vertex shader
124			bool has_lightvec; // is a light vector available?
125	root	1.38	shader::temp_3f sh_lightvec; // not defined unless has_lightvec is true
126			shader::temp_3f sh_colour; // always available for any light
127	root	1.32
128	root	1.38	virtual void enable (view &ctx);
129			virtual void disable (view &ctx);
130	root	1.33
131	root	1.39	virtual void vsh () = 0; // vertex shader
132			virtual void fsh () = 0; // fragment shader
133
134	root	1.33	protected:
135	root	1.38	shader::varying_3f lightvec;
136			shader::varying_1f camdist;
137	root	1.33	shader::uniform_3f lightpos; // or direction
138	root	1.32	};
139
140			struct linear_light : light
141			{
142	root	1.31	colour c;
143			GLfloat intensity;
144			GLfloat radius;
145	root	1.32
146	root	1.39	void enable (view &ctx);
147			void disable (view &ctx);
148
149	root	1.32	void vsh ();
150	root	1.33	void fsh ();
151	root	1.1	};
152	root	1.7
153	root	1.1	#endif
154