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(){
46 #if defined( DEBUG_CULLING )
51 inline void debug_count_plane(){
52 #if defined( DEBUG_CULLING )
57 inline void debug_count_oriented_plane(){
58 #if defined( DEBUG_CULLING )
59 ++g_count_oriented_planes;
63 inline void debug_count_bbox(){
64 #if defined( DEBUG_CULLING )
69 inline void debug_count_oriented_bbox(){
70 #if defined( DEBUG_CULLING )
71 ++g_count_oriented_bboxs;
78 /// \brief View-volume culling and transformations.
79 class View : public VolumeTest
85 /// device-to-screen transform
90 /// combined modelview and projection matrix
92 /// camera position in world space
94 /// view frustum in world space
100 m_viewproj = matrix4_multiplied_by_matrix4( matrix4_multiplied_by_matrix4( m_scissor, m_projection ), m_modelview );
102 m_frustum = frustum_from_viewproj( m_viewproj );
103 m_viewer = viewer_from_viewproj( m_viewproj );
106 View( bool fill = false ) :
107 m_modelview( g_matrix4_identity ),
108 m_projection( g_matrix4_identity ),
109 m_scissor( g_matrix4_identity ),
112 void Construct( const Matrix4& projection, const Matrix4& modelview, std::size_t width, std::size_t height ){
114 m_modelview = modelview;
117 m_projection = projection;
120 m_viewport = g_matrix4_identity;
121 m_viewport[0] = float(width / 2);
122 m_viewport[5] = float(height / 2);
123 if ( fabs( m_projection[11] ) > 0.0000001 ) {
124 m_viewport[10] = m_projection[0] * m_viewport[0];
127 m_viewport[10] = 1 / m_projection[10];
132 void EnableScissor( float min_x, float max_x, float min_y, float max_y ){
133 m_scissor = g_matrix4_identity;
134 m_scissor[0] = static_cast<float>( ( max_x - min_x ) * 0.5 );
135 m_scissor[5] = static_cast<float>( ( max_y - min_y ) * 0.5 );
136 m_scissor[12] = static_cast<float>( ( min_x + max_x ) * 0.5 );
137 m_scissor[13] = static_cast<float>( ( min_y + max_y ) * 0.5 );
138 matrix4_full_invert( m_scissor );
142 void DisableScissor(){
143 m_scissor = g_matrix4_identity;
148 bool TestPoint( const Vector3& point ) const {
149 return viewproj_test_point( m_viewproj, point );
151 bool TestLine( const Segment& segment ) const {
152 return frustum_test_line( m_frustum, segment );
154 bool TestPlane( const Plane3& plane ) const {
156 return viewer_test_plane( m_viewer, plane );
158 bool TestPlane( const Plane3& plane, const Matrix4& localToWorld ) const {
159 debug_count_oriented_plane();
160 return viewer_test_transformed_plane( m_viewer, plane, localToWorld );
162 VolumeIntersectionValue TestAABB( const AABB& aabb ) const {
164 return frustum_test_aabb( m_frustum, aabb );
166 VolumeIntersectionValue TestAABB( const AABB& aabb, const Matrix4& localToWorld ) const {
167 debug_count_oriented_bbox();
168 return frustum_intersects_transformed_aabb( m_frustum, aabb, localToWorld );
171 const Matrix4& GetViewMatrix() const {
174 const Matrix4& GetViewport() const {
177 const Matrix4& GetModelview() const {
180 const Matrix4& GetProjection() const {
187 const Vector3& getViewer() const {
188 return vector4_to_vector3( m_viewer );