libgender/entity.C

#include <algorithm>
#include <cmath>

using namespace std;

#include "entity.h"

const vec3 cross (const vec3 &a, const vec3 &b)
{
  return vec3 (
            a.y * b.z - a.z * b.y,
            a.z * b.x - a.x * b.z,
            a.x * b.y - a.y * b.x
         );
}

GLfloat dot (const vec3 &a, const vec3 &b)
{
  return a.x * b.x + a.y * b.y + a.z * b.z;
}

void box::add (const box &o)
{
  a.x = min (a.x, o.a.x);
  a.y = min (a.y, o.a.y);
  a.z = min (a.z, o.a.z);
  b.x = max (b.x, o.b.x);
  b.y = max (b.y, o.b.y);
  b.z = max (b.z, o.b.z);
}

void entity_base::update_bbox ()
{
  if (parent)
    parent->update_bbox ();
}

void entity_base::hide ()
{
  for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
    (*i)->remove (this);

  o.clear ();
}

void entity_filter::update_bbox ()
{
  bbox = e->bbox;
  entity_base::update_bbox ();
}

void entity_filter::show (const sector &sec)
{
  e->show (sec);
}

void entity_filter::draw ()
{
  e->draw ();
}

entity_filter::~entity_filter ()
{
  delete e;
}

void entity::show (const sector &sec)
{
  show ();
}

void entity::show ()
{
  e->show (this->sec);
}

void entity::draw ()
{
  glPushMatrix ();
  //TODO setup matrix etc.
  e->draw ();
  glPopMatrix ();
}

void entity_container::update_bbox ()
{
  bbox.reset ();

  for (iterator i = end (); i-- != begin (); )
    {
      (*i)->update_bbox ();
      bbox.add ((*i)->bbox);
    }
}

void entity_container::show (const sector &sec)
{
  for (iterator i = end (); i-- != begin (); )
    (*i)->show (sec);
}

void entity_container::draw ()
{
  for (iterator i = end (); i-- != begin (); )
    (*i)->draw ();
}

entity_container::~entity_container ()
{
  hide ();

  for (iterator i = end (); i-- != begin (); )
    delete *i;
 
  clear ();
}

template entity_opengl1d<GL_POINTS>;
template entity_opengl1d<GL_LINES>;
template entity_opengl1d<GL_LINE_STRIP>;
template entity_opengl1d<GL_LINE_LOOP>;
template entity_opengl2d<GL_TRIANGLES>;
template entity_opengl2d<GL_TRIANGLE_STRIP>;
template entity_opengl2d<GL_TRIANGLE_FAN>;
template entity_opengl2d<GL_QUADS>;
template entity_opengl2d<GL_QUAD_STRIP>;
template entity_opengl2d<GL_POLYGON>;

template<GLenum type>
void entity_opengl1d<type>::update_bbox ()
{
  entity_base::update_bbox ();
}

template<GLenum type>
void entity_opengl2d<type>::update_bbox ()
{
  entity_base::update_bbox ();
}

template<GLenum type>
void entity_opengl1d<type>::draw ()
{
  glBegin (type);

  for (iterator i = begin (); i < end (); ++i)
    {
      glColor3fv ((GLfloat *)&i->c);
      glVertex3fv ((GLfloat *)&i->p);
    }

  glEnd ();
}

template<GLenum type>
void entity_opengl2d<type>::draw ()
{
  glBegin (type);

  for (iterator i = begin (); i < end (); ++i)
    {
      glColor3fv ((GLfloat *)&i->c);
      glNormal3fv ((GLfloat *)&i->n);
      glTexCoord2fv ((GLfloat *)&i->t);
      glVertex3fv ((GLfloat *)&i->p);
    }

  glEnd ();
}

template<GLenum type>
void entity_opengl1d<type>::show (const sector &sec)
{
}

template<GLenum type>
void entity_opengl2d<type>::show (const sector &sec)
{
}

void view::draw (const draw_context &c)
{
  glViewport (0, 0, w, h);

  glMatrixMode (GL_PROJECTION);
  glLoadIdentity ();

  double aspect = (double)w/h;
  double zNear = 5;
  double zFar = 1000.;

  {
    GLdouble xmin, xmax, ymin, ymax;

    ymax = zNear * tan (fov * (M_PI / 360.0));
    ymin = -ymax;
    xmin = ymin * aspect;
    xmax = ymax * aspect;

    glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
  }

  vec3 rz = -d;
  vec3 rx = cross (u, rz);
  vec3 ry = cross (rz, rx);

  GLfloat m[4][4];
  m[0][0] = rx.x; m[0][1] = rx.y; m[0][2] = rx.z; m[0][3] = 0;
  m[1][0] = ry.x; m[1][1] = ry.y; m[1][2] = ry.z; m[1][3] = 0;
  m[2][0] = rz.x; m[2][1] = rz.y; m[2][2] = rz.z; m[2][3] = 0;
  m[3][0] =    0; m[3][1] =    0; m[3][2] =    0; m[3][3] = 1;
  glMultMatrixf ((GLfloat *)m);

  glTranslatef (-p.x, -p.y, -p.z);

  glMatrixMode (GL_MODELVIEW);
  glLoadIdentity ();

  entity *e = new entity;
  e->sec.x = e->sec.y = e->sec.z = 0;

  entity_triangles *tri = new entity_triangles;
  tri->push_back (vertex2d (colour (1, 0, 0), point (-9, 0, -9), vec3 (0, 0, 1)));
  tri->push_back (vertex2d (colour (0, 1, 1), point ( 0, 9, -9), vec3 (0, 0, 1)));
  tri->push_back (vertex2d (colour (1, 0, 1), point ( 9, 0, -9), vec3 (0, 0, 1)));
  e->set (tri);

  e->show ();
  e->draw ();

  delete e;
}


Revision:	1.2
Committed:	Sun Oct 3 01:14:40 2004 UTC (21 years, 11 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+138 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#include <algorithm>
2	root	1.2	#include <cmath>
3	root	1.1
4			using namespace std;
5
6			#include "entity.h"
7
8	root	1.2	const vec3 cross (const vec3 &a, const vec3 &b)
9			{
10			return vec3 (
11			a.y * b.z - a.z * b.y,
12			a.z * b.x - a.x * b.z,
13			a.x * b.y - a.y * b.x
14			);
15			}
16
17			GLfloat dot (const vec3 &a, const vec3 &b)
18			{
19			return a.x * b.x + a.y * b.y + a.z * b.z;
20			}
21
22	root	1.1	void box::add (const box &o)
23			{
24			a.x = min (a.x, o.a.x);
25			a.y = min (a.y, o.a.y);
26			a.z = min (a.z, o.a.z);
27			b.x = max (b.x, o.b.x);
28			b.y = max (b.y, o.b.y);
29			b.z = max (b.z, o.b.z);
30			}
31
32			void entity_base::update_bbox ()
33			{
34			if (parent)
35			parent->update_bbox ();
36			}
37
38			void entity_base::hide ()
39			{
40			for (vector<octant *>::iterator i = o.end (); i-- != o.begin (); )
41			(*i)->remove (this);
42
43			o.clear ();
44			}
45
46			void entity_filter::update_bbox ()
47			{
48			bbox = e->bbox;
49			entity_base::update_bbox ();
50			}
51
52			void entity_filter::show (const sector &sec)
53			{
54			e->show (sec);
55			}
56
57			void entity_filter::draw ()
58			{
59			e->draw ();
60			}
61
62			entity_filter::~entity_filter ()
63			{
64			delete e;
65			}
66
67			void entity::show (const sector &sec)
68			{
69	root	1.2	show ();
70			}
71
72			void entity::show ()
73			{
74	root	1.1	e->show (this->sec);
75			}
76
77			void entity::draw ()
78			{
79	root	1.2	glPushMatrix ();
80	root	1.1	//TODO setup matrix etc.
81			e->draw ();
82	root	1.2	glPopMatrix ();
83	root	1.1	}
84
85			void entity_container::update_bbox ()
86			{
87			bbox.reset ();
88
89			for (iterator i = end (); i-- != begin (); )
90			{
91			(*i)->update_bbox ();
92			bbox.add ((*i)->bbox);
93			}
94			}
95
96			void entity_container::show (const sector &sec)
97			{
98			for (iterator i = end (); i-- != begin (); )
99			(*i)->show (sec);
100			}
101
102			void entity_container::draw ()
103			{
104			for (iterator i = end (); i-- != begin (); )
105			(*i)->draw ();
106			}
107
108			entity_container::~entity_container ()
109			{
110			hide ();
111
112			for (iterator i = end (); i-- != begin (); )
113			delete *i;
114
115			clear ();
116	root	1.2	}
117
118			template entity_opengl1d<GL_POINTS>;
119			template entity_opengl1d<GL_LINES>;
120			template entity_opengl1d<GL_LINE_STRIP>;
121			template entity_opengl1d<GL_LINE_LOOP>;
122			template entity_opengl2d<GL_TRIANGLES>;
123			template entity_opengl2d<GL_TRIANGLE_STRIP>;
124			template entity_opengl2d<GL_TRIANGLE_FAN>;
125			template entity_opengl2d<GL_QUADS>;
126			template entity_opengl2d<GL_QUAD_STRIP>;
127			template entity_opengl2d<GL_POLYGON>;
128
129			template<GLenum type>
130			void entity_opengl1d<type>::update_bbox ()
131			{
132			entity_base::update_bbox ();
133			}
134
135			template<GLenum type>
136			void entity_opengl2d<type>::update_bbox ()
137			{
138			entity_base::update_bbox ();
139			}
140
141			template<GLenum type>
142			void entity_opengl1d<type>::draw ()
143			{
144			glBegin (type);
145
146			for (iterator i = begin (); i < end (); ++i)
147			{
148			glColor3fv ((GLfloat *)&i->c);
149			glVertex3fv ((GLfloat *)&i->p);
150			}
151
152			glEnd ();
153			}
154
155			template<GLenum type>
156			void entity_opengl2d<type>::draw ()
157			{
158			glBegin (type);
159
160			for (iterator i = begin (); i < end (); ++i)
161			{
162			glColor3fv ((GLfloat *)&i->c);
163			glNormal3fv ((GLfloat *)&i->n);
164			glTexCoord2fv ((GLfloat *)&i->t);
165			glVertex3fv ((GLfloat *)&i->p);
166			}
167
168			glEnd ();
169			}
170
171			template<GLenum type>
172			void entity_opengl1d<type>::show (const sector &sec)
173			{
174			}
175
176			template<GLenum type>
177			void entity_opengl2d<type>::show (const sector &sec)
178			{
179			}
180
181			void view::draw (const draw_context &c)
182			{
183			glViewport (0, 0, w, h);
184
185			glMatrixMode (GL_PROJECTION);
186			glLoadIdentity ();
187
188			double aspect = (double)w/h;
189			double zNear = 5;
190			double zFar = 1000.;
191
192			{
193			GLdouble xmin, xmax, ymin, ymax;
194
195			ymax = zNear * tan (fov * (M_PI / 360.0));
196			ymin = -ymax;
197			xmin = ymin * aspect;
198			xmax = ymax * aspect;
199
200			glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
201			}
202
203			vec3 rz = -d;
204			vec3 rx = cross (u, rz);
205			vec3 ry = cross (rz, rx);
206
207			GLfloat m[4][4];
208			m[0][0] = rx.x; m[0][1] = rx.y; m[0][2] = rx.z; m[0][3] = 0;
209			m[1][0] = ry.x; m[1][1] = ry.y; m[1][2] = ry.z; m[1][3] = 0;
210			m[2][0] = rz.x; m[2][1] = rz.y; m[2][2] = rz.z; m[2][3] = 0;
211			m[3][0] = 0; m[3][1] = 0; m[3][2] = 0; m[3][3] = 1;
212			glMultMatrixf ((GLfloat *)m);
213
214			glTranslatef (-p.x, -p.y, -p.z);
215
216			glMatrixMode (GL_MODELVIEW);
217			glLoadIdentity ();
218
219			entity *e = new entity;
220			e->sec.x = e->sec.y = e->sec.z = 0;
221
222			entity_triangles *tri = new entity_triangles;
223			tri->push_back (vertex2d (colour (1, 0, 0), point (-9, 0, -9), vec3 (0, 0, 1)));
224			tri->push_back (vertex2d (colour (0, 1, 1), point ( 0, 9, -9), vec3 (0, 0, 1)));
225			tri->push_back (vertex2d (colour (1, 0, 1), point ( 9, 0, -9), vec3 (0, 0, 1)));
226			e->set (tri);
227
228			e->show ();
229			e->draw ();
230
231			delete e;
232	root	1.1	}
233
234