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https://github.com/MaSzyna-EU07/maszyna.git
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56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#include "stdafx.h"
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#include "rendering/openglcamera.h"
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#include "vehicle/DynObj.h"
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void
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opengl_camera::update_frustum( glm::mat4 const &Projection, glm::mat4 const &Modelview ) {
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m_frustum.calculate( Projection, Modelview );
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// cache inverse tranformation matrix
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// NOTE: transformation is done only to camera-centric space
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m_inversetransformation = glm::inverse( Projection * glm::mat4{ glm::mat3{ Modelview } } );
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// calculate frustum corners
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m_frustumpoints = ndcfrustumshapepoints;
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transform_to_world(
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std::begin( m_frustumpoints ),
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std::end( m_frustumpoints ) );
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}
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// returns true if specified object is within camera frustum, false otherwise
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bool
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opengl_camera::visible( scene::bounding_area const &Area ) const {
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return ( m_frustum.sphere_inside( Area.center, Area.radius ) > 0.f );
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}
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bool
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opengl_camera::visible( TDynamicObject const *Dynamic ) const {
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// sphere test is faster than AABB, so we'll use it here
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// we're giving vehicles some extra padding, to allow for things like shared bogeys extending past the main body
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return ( m_frustum.sphere_inside( Dynamic->GetPosition(), Dynamic->radius() * 1.25 ) > 0.0f );
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}
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// debug helper, draws shape of frustum in world space
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void
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opengl_camera::draw( glm::vec3 const &Offset ) const {
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::glBegin( GL_LINES );
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for( auto const pointindex : frustumshapepoinstorder ) {
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::glVertex3fv( glm::value_ptr( glm::vec3{ m_frustumpoints[ pointindex ] } - Offset ) );
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}
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::glEnd();
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}
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//---------------------------------------------------------------------------
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