2 Copyright (C) 2001-2006, William Joseph.
5 This file is part of GtkRadiant.
7 GtkRadiant is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GtkRadiant is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GtkRadiant; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #if !defined( INCLUDED_VIEW_H )
23 #define INCLUDED_VIEW_H
25 #include "globaldefs.h"
27 #include "math/frustum.h"
35 #if defined( DEBUG_CULLING )
37 extern int g_count_dots;
38 extern int g_count_planes;
39 extern int g_count_oriented_planes;
40 extern int g_count_bboxs;
41 extern int g_count_oriented_bboxs;
45 inline void debug_count_dot()
47 #if defined( DEBUG_CULLING )
52 inline void debug_count_plane()
54 #if defined( DEBUG_CULLING )
59 inline void debug_count_oriented_plane()
61 #if defined( DEBUG_CULLING )
62 ++g_count_oriented_planes;
66 inline void debug_count_bbox()
68 #if defined( DEBUG_CULLING )
73 inline void debug_count_oriented_bbox()
75 #if defined( DEBUG_CULLING )
76 ++g_count_oriented_bboxs;
81 /// \brief View-volume culling and transformations.
82 class View : public VolumeTest {
87 /// device-to-screen transform
92 /// combined modelview and projection matrix
94 /// camera position in world space
96 /// view frustum in world space
103 m_viewproj = matrix4_multiplied_by_matrix4(matrix4_multiplied_by_matrix4(m_scissor, m_projection), m_modelview);
105 m_frustum = frustum_from_viewproj(m_viewproj);
106 m_viewer = viewer_from_viewproj(m_viewproj);
110 View(bool fill = false) :
111 m_modelview(g_matrix4_identity),
112 m_projection(g_matrix4_identity),
113 m_scissor(g_matrix4_identity),
118 void Construct(const Matrix4 &projection, const Matrix4 &modelview, std::size_t width, std::size_t height)
121 m_modelview = modelview;
124 m_projection = projection;
127 m_viewport = g_matrix4_identity;
128 m_viewport[0] = float(width / 2);
129 m_viewport[5] = float(height / 2);
130 if (fabs(m_projection[11]) > 0.0000001) {
131 m_viewport[10] = m_projection[0] * m_viewport[0];
133 m_viewport[10] = 1 / m_projection[10];
139 void EnableScissor(float min_x, float max_x, float min_y, float max_y)
141 m_scissor = g_matrix4_identity;
142 m_scissor[0] = static_cast<float>((max_x - min_x) * 0.5 );
143 m_scissor[5] = static_cast<float>((max_y - min_y) * 0.5 );
144 m_scissor[12] = static_cast<float>((min_x + max_x) * 0.5 );
145 m_scissor[13] = static_cast<float>((min_y + max_y) * 0.5 );
146 matrix4_full_invert(m_scissor);
151 void DisableScissor()
153 m_scissor = g_matrix4_identity;
158 bool TestPoint(const Vector3 &point) const
160 return viewproj_test_point(m_viewproj, point);
163 bool TestLine(const Segment &segment) const
165 return frustum_test_line(m_frustum, segment);
168 bool TestPlane(const Plane3 &plane) const
171 return viewer_test_plane(m_viewer, plane);
174 bool TestPlane(const Plane3 &plane, const Matrix4 &localToWorld) const
176 debug_count_oriented_plane();
177 return viewer_test_transformed_plane(m_viewer, plane, localToWorld);
180 VolumeIntersectionValue TestAABB(const AABB &aabb) const
183 return frustum_test_aabb(m_frustum, aabb);
186 VolumeIntersectionValue TestAABB(const AABB &aabb, const Matrix4 &localToWorld) const
188 debug_count_oriented_bbox();
189 return frustum_intersects_transformed_aabb(m_frustum, aabb, localToWorld);
192 const Matrix4 &GetViewMatrix() const
197 const Matrix4 &GetViewport() const
202 const Matrix4 &GetModelview() const
207 const Matrix4 &GetProjection() const
217 const Vector3 &getViewer() const
219 return vector4_to_vector3(m_viewer);