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
26 #include "math/frustum.h"
34 #if defined(DEBUG_CULLING)
36 extern int g_count_dots;
37 extern int g_count_planes;
38 extern int g_count_oriented_planes;
39 extern int g_count_bboxs;
40 extern int g_count_oriented_bboxs;
44 inline void debug_count_dot()
46 #if defined(DEBUG_CULLING)
51 inline void debug_count_plane()
53 #if defined(DEBUG_CULLING)
58 inline void debug_count_oriented_plane()
60 #if defined(DEBUG_CULLING)
61 ++g_count_oriented_planes;
65 inline void debug_count_bbox()
67 #if defined(DEBUG_CULLING)
72 inline void debug_count_oriented_bbox()
74 #if defined(DEBUG_CULLING)
75 ++g_count_oriented_bboxs;
82 /// \brief View-volume culling and transformations.
83 class View : public VolumeTest
89 /// device-to-screen transform
94 /// combined modelview and projection matrix
96 /// camera position in world space
98 /// view frustum in world space
105 m_viewproj = matrix4_multiplied_by_matrix4(matrix4_multiplied_by_matrix4(m_scissor, m_projection), m_modelview);
107 m_frustum = frustum_from_viewproj(m_viewproj);
108 m_viewer = viewer_from_viewproj(m_viewproj);
111 View(bool fill = false) :
112 m_modelview(g_matrix4_identity),
113 m_projection(g_matrix4_identity),
114 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];
137 void EnableScissor(float min_x, float max_x, float min_y, float max_y)
139 m_scissor = g_matrix4_identity;
140 m_scissor[0] = static_cast<float>((max_x - min_x) * 0.5);
141 m_scissor[5] = static_cast<float>((max_y - min_y) * 0.5);
142 m_scissor[12] = static_cast<float>((min_x + max_x) * 0.5);
143 m_scissor[13] = static_cast<float>((min_y + max_y) * 0.5);
144 matrix4_full_invert(m_scissor);
148 void DisableScissor()
150 m_scissor = g_matrix4_identity;
155 bool TestPoint(const Vector3& point) const
157 return viewproj_test_point(m_viewproj, point);
159 bool TestLine(const Segment& segment) const
161 return frustum_test_line(m_frustum, segment);
163 bool TestPlane(const Plane3& plane) const
166 return viewer_test_plane(m_viewer, plane);
168 bool TestPlane(const Plane3& plane, const Matrix4& localToWorld) const
170 debug_count_oriented_plane();
171 return viewer_test_transformed_plane(m_viewer, plane, localToWorld);
173 VolumeIntersectionValue TestAABB(const AABB& aabb) const
176 return frustum_test_aabb(m_frustum, aabb);
178 VolumeIntersectionValue TestAABB(const AABB& aabb, const Matrix4& localToWorld) const
180 debug_count_oriented_bbox();
181 return frustum_intersects_transformed_aabb(m_frustum, aabb, localToWorld);
184 const Matrix4& GetViewMatrix() const
188 const Matrix4& GetViewport() const
192 const Matrix4& GetModelview() const
196 const Matrix4& GetProjection() const
205 const Vector3& getViewer() const
207 return vector4_to_vector3(m_viewer);