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(){
45 #if defined( DEBUG_CULLING )
50 inline void debug_count_plane(){
51 #if defined( DEBUG_CULLING )
56 inline void debug_count_oriented_plane(){
57 #if defined( DEBUG_CULLING )
58 ++g_count_oriented_planes;
62 inline void debug_count_bbox(){
63 #if defined( DEBUG_CULLING )
68 inline void debug_count_oriented_bbox(){
69 #if defined( DEBUG_CULLING )
70 ++g_count_oriented_bboxs;
77 /// \brief View-volume culling and transformations.
78 class View : public VolumeTest
84 /// device-to-screen transform
89 /// combined modelview and projection matrix
91 /// camera position in world space
93 /// view frustum in world space
99 m_viewproj = matrix4_multiplied_by_matrix4( matrix4_multiplied_by_matrix4( m_scissor, m_projection ), m_modelview );
101 m_frustum = frustum_from_viewproj( m_viewproj );
102 m_viewer = viewer_from_viewproj( m_viewproj );
105 View( bool fill = false ) :
106 m_modelview( g_matrix4_identity ),
107 m_projection( g_matrix4_identity ),
108 m_scissor( g_matrix4_identity ),
111 void Construct( const Matrix4& projection, const Matrix4& modelview, std::size_t width, std::size_t height ){
113 m_modelview = modelview;
116 m_projection = projection;
119 m_viewport = g_matrix4_identity;
120 m_viewport[0] = float(width / 2);
121 m_viewport[5] = float(height / 2);
122 if ( fabs( m_projection[11] ) > 0.0000001 ) {
123 m_viewport[10] = m_projection[0] * m_viewport[0];
126 m_viewport[10] = 1 / m_projection[10];
131 void EnableScissor( float min_x, float max_x, float min_y, float max_y ){
132 m_scissor = g_matrix4_identity;
133 m_scissor[0] = static_cast<float>( ( max_x - min_x ) * 0.5 );
134 m_scissor[5] = static_cast<float>( ( max_y - min_y ) * 0.5 );
135 m_scissor[12] = static_cast<float>( ( min_x + max_x ) * 0.5 );
136 m_scissor[13] = static_cast<float>( ( min_y + max_y ) * 0.5 );
137 matrix4_full_invert( m_scissor );
141 void DisableScissor(){
142 m_scissor = g_matrix4_identity;
147 bool TestPoint( const Vector3& point ) const {
148 return viewproj_test_point( m_viewproj, point );
150 bool TestLine( const Segment& segment ) const {
151 return frustum_test_line( m_frustum, segment );
153 bool TestPlane( const Plane3& plane ) const {
155 return viewer_test_plane( m_viewer, plane );
157 bool TestPlane( const Plane3& plane, const Matrix4& localToWorld ) const {
158 debug_count_oriented_plane();
159 return viewer_test_transformed_plane( m_viewer, plane, localToWorld );
161 VolumeIntersectionValue TestAABB( const AABB& aabb ) const {
163 return frustum_test_aabb( m_frustum, aabb );
165 VolumeIntersectionValue TestAABB( const AABB& aabb, const Matrix4& localToWorld ) const {
166 debug_count_oriented_bbox();
167 return frustum_intersects_transformed_aabb( m_frustum, aabb, localToWorld );
170 const Matrix4& GetViewMatrix() const {
173 const Matrix4& GetViewport() const {
176 const Matrix4& GetModelview() const {
179 const Matrix4& GetProjection() const {
186 const Vector3& getViewer() const {
187 return vector4_to_vector3( m_viewer );