590 lines
16 KiB
C++
590 lines
16 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
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* Copyright (C) 2015-2020 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file camera.cpp
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*/
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#include "camera.h"
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#include <wx/log.h>
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// A helper function to normalize aAngle between -2PI and +2PI
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inline void normalise2PI( float& aAngle )
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{
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while( aAngle > 0.0 )
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aAngle -= static_cast<float>( M_PI * 2.0f );
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while( aAngle < 0.0 )
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aAngle += static_cast<float>( M_PI * 2.0f );
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}
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/**
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* @ingroup trace_env_vars
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*/
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const wxChar *CAMERA::m_logTrace = wxT( "KI_TRACE_CAMERA" );
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#define MIN_ZOOM 0.10f
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#define MAX_ZOOM 1.25f
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CAMERA::CAMERA( float aRangeScale, float aDefaultZoom )
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{
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wxLogTrace( m_logTrace, wxT( "CAMERA::CAMERA" ) );
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m_range_scale = aRangeScale;
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m_default_zoom = aDefaultZoom;
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m_camera_pos_init = SFVEC3F( 0.0f, 0.0f, -(aRangeScale * 2.0f ) );
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m_board_lookat_pos_init = SFVEC3F( 0.0f );
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m_windowSize = SFVEC2I( 0, 0 );
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m_projectionType = PROJECTION_TYPE::PERSPECTIVE;
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m_interpolation_mode = CAMERA_INTERPOLATION::BEZIER;
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Reset();
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}
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void CAMERA::Reset()
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{
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m_parametersChanged = true;
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m_projectionMatrix = glm::mat4( 1.0f );
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m_projectionMatrixInv = glm::mat4( 1.0f );
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m_rotationMatrix = glm::mat4( 1.0f );
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m_rotationMatrixAux = glm::mat4( 1.0f );
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m_lastPosition = wxPoint( 0, 0 );
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m_zoom = m_default_zoom;
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m_zoom_t0 = m_default_zoom;
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m_zoom_t1 = m_default_zoom;
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m_camera_pos = m_camera_pos_init;
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m_camera_pos_t0 = m_camera_pos_init;
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m_camera_pos_t1 = m_camera_pos_init;
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m_lookat_pos = m_board_lookat_pos_init;
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m_lookat_pos_t0 = m_board_lookat_pos_init;
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m_lookat_pos_t1 = m_board_lookat_pos_init;
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m_rotate_aux = SFVEC3F( 0.0f );
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m_rotate_aux_t0 = SFVEC3F( 0.0f );
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m_rotate_aux_t1 = SFVEC3F( 0.0f );
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updateRotationMatrix();
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updateViewMatrix();
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m_viewMatrixInverse = glm::inverse( m_viewMatrix );
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m_scr_nX.clear();
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m_scr_nY.clear();
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rebuildProjection();
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}
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void CAMERA::Reset_T1()
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{
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m_camera_pos_t1 = m_camera_pos_init;
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m_zoom_t1 = m_default_zoom;
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m_rotate_aux_t1 = SFVEC3F( 0.0f );
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m_lookat_pos_t1 = m_board_lookat_pos_init;
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// Since 0 = 2pi, we want to reset the angle to be the closest
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// one to where we currently are. That ensures that we rotate
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// the board around the smallest distance getting there.
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if( m_rotate_aux_t0.x > M_PI )
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m_rotate_aux_t1.x = static_cast<float>( 2.0f * M_PI );
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if( m_rotate_aux_t0.y > M_PI )
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m_rotate_aux_t1.y = static_cast<float>( 2.0f * M_PI );
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if( m_rotate_aux_t0.z > M_PI )
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m_rotate_aux_t1.z = static_cast<float>( 2.0f * M_PI );
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}
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void CAMERA::updateViewMatrix()
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{
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m_viewMatrix = glm::translate( glm::mat4( 1.0f ), m_camera_pos ) *
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m_rotationMatrix * m_rotationMatrixAux *
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glm::translate( glm::mat4( 1.0f ), -m_lookat_pos );
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}
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void CAMERA::updateRotationMatrix()
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{
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m_rotationMatrixAux = glm::rotate( glm::mat4( 1.0f ), m_rotate_aux.x,
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SFVEC3F( 1.0f, 0.0f, 0.0f ) );
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normalise2PI( m_rotate_aux.x );
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m_rotationMatrixAux = glm::rotate( m_rotationMatrixAux, m_rotate_aux.y,
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SFVEC3F( 0.0f, 1.0f, 0.0f ) );
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normalise2PI( m_rotate_aux.y );
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m_rotationMatrixAux = glm::rotate( m_rotationMatrixAux, m_rotate_aux.z,
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SFVEC3F( 0.0f, 0.0f, 1.0f ) );
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normalise2PI( m_rotate_aux.z );
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m_parametersChanged = true;
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updateViewMatrix();
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updateFrustum();
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}
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const glm::mat4 CAMERA::GetRotationMatrix() const
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{
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return m_rotationMatrix * m_rotationMatrixAux;
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}
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void CAMERA::rebuildProjection()
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{
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if( ( m_windowSize.x == 0 ) || ( m_windowSize.y == 0 ) )
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return;
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m_frustum.ratio = (float) m_windowSize.x / (float)m_windowSize.y;
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// Consider that we can render double the length multiplied by the 2/sqrt(2)
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m_frustum.farD = glm::length( m_camera_pos_init ) * 2.0f * ( 2.0f * sqrtf( 2.0f ) );
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switch( m_projectionType )
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{
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default:
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case PROJECTION_TYPE::PERSPECTIVE:
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m_frustum.nearD = 0.10f;
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// Ratio width / height of the window display
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m_frustum.angle = 45.0f;
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m_projectionMatrix = glm::perspective( glm::radians( m_frustum.angle ), m_frustum.ratio,
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m_frustum.nearD, m_frustum.farD );
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m_projectionMatrixInv = glm::inverse( m_projectionMatrix );
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m_frustum.tang = glm::tan( glm::radians( m_frustum.angle ) * 0.5f );
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m_focalLen.x = ( (float)m_windowSize.y / (float)m_windowSize.x ) / m_frustum.tang;
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m_focalLen.y = 1.0f / m_frustum.tang;
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m_frustum.nh = m_frustum.nearD * m_frustum.tang;
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m_frustum.nw = m_frustum.nh * m_frustum.ratio;
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m_frustum.fh = m_frustum.farD * m_frustum.tang;
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m_frustum.fw = m_frustum.fh * m_frustum.ratio;
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break;
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case PROJECTION_TYPE::ORTHO:
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m_frustum.nearD = -m_frustum.farD; // Use a symmetrical clip plane for ortho projection
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// This formula was found by trial and error
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const float orthoReductionFactor = glm::length( m_camera_pos_init ) *
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m_zoom * m_zoom * 0.5f;
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// Initialize Projection Matrix for Orthographic View
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m_projectionMatrix = glm::ortho( -m_frustum.ratio * orthoReductionFactor,
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m_frustum.ratio * orthoReductionFactor,
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-orthoReductionFactor,
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orthoReductionFactor,
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m_frustum.nearD, m_frustum.farD );
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m_projectionMatrixInv = glm::inverse( m_projectionMatrix );
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m_frustum.nw = orthoReductionFactor * 2.0f * m_frustum.ratio;
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m_frustum.nh = orthoReductionFactor * 2.0f;
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m_frustum.fw = m_frustum.nw;
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m_frustum.fh = m_frustum.nh;
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break;
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}
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if( ( m_windowSize.x > 0 ) && ( m_windowSize.y > 0 ) )
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{
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m_scr_nX.resize( m_windowSize.x + 1 );
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m_scr_nY.resize( m_windowSize.y + 1 );
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// Precalc X values for camera -> ray generation
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for( unsigned int x = 0; x < (unsigned int)m_windowSize.x + 1; ++x )
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{
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// Converts 0.0 .. 1.0
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const float xNormalizedDeviceCoordinates = ( ( (float)x + 0.5f ) /
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(m_windowSize.x - 0.0f) );
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// Converts -1.0 .. 1.0
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m_scr_nX[x] = 2.0f * xNormalizedDeviceCoordinates - 1.0f;
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}
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// Precalc Y values for camera -> ray generation
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for( unsigned int y = 0; y < (unsigned int)m_windowSize.y + 1 ; ++y )
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{
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// Converts 0.0 .. 1.0
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const float yNormalizedDeviceCoordinates = ( ( (float)y + 0.5f ) /
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(m_windowSize.y - 0.0f) );
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// Converts -1.0 .. 1.0
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m_scr_nY[y] = 2.0f * yNormalizedDeviceCoordinates - 1.0f;
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}
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updateFrustum();
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}
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}
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void CAMERA::updateFrustum()
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{
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// Update matrix and vectors
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m_viewMatrixInverse = glm::inverse( m_viewMatrix );
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m_right = glm::normalize( SFVEC3F( m_viewMatrixInverse *
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glm::vec4( SFVEC3F( 1.0, 0.0, 0.0 ), 0.0 ) ) );
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m_up = glm::normalize( SFVEC3F( m_viewMatrixInverse *
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glm::vec4( SFVEC3F( 0.0, 1.0, 0.0 ), 0.0 ) ) );
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m_dir = glm::normalize( SFVEC3F( m_viewMatrixInverse *
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glm::vec4( SFVEC3F( 0.0, 0.0, 1.0 ), 0.0 ) ) );
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m_pos = SFVEC3F( m_viewMatrixInverse * glm::vec4( SFVEC3F( 0.0, 0.0, 0.0 ), 1.0 ) );
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/*
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* Frustum is a implementation based on a tutorial by
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* http://www.lighthouse3d.com/tutorials/view-frustum-culling/
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*/
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// compute the centers of the near and far planes
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m_frustum.nc = m_pos - m_dir * m_frustum.nearD;
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m_frustum.fc = m_pos - m_dir * m_frustum.farD;
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// compute the 4 corners of the frustum on the near plane
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m_frustum.ntl = m_frustum.nc + m_up * m_frustum.nh - m_right * m_frustum.nw;
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m_frustum.ntr = m_frustum.nc + m_up * m_frustum.nh + m_right * m_frustum.nw;
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m_frustum.nbl = m_frustum.nc - m_up * m_frustum.nh - m_right * m_frustum.nw;
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m_frustum.nbr = m_frustum.nc - m_up * m_frustum.nh + m_right * m_frustum.nw;
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// compute the 4 corners of the frustum on the far plane
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m_frustum.ftl = m_frustum.fc + m_up * m_frustum.fh - m_right * m_frustum.fw;
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m_frustum.ftr = m_frustum.fc + m_up * m_frustum.fh + m_right * m_frustum.fw;
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m_frustum.fbl = m_frustum.fc - m_up * m_frustum.fh - m_right * m_frustum.fw;
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m_frustum.fbr = m_frustum.fc - m_up * m_frustum.fh + m_right * m_frustum.fw;
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if( ( m_windowSize.x > 0 ) && ( m_windowSize.y > 0 ) )
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{
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// Reserve size for precalc values
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m_right_nX.resize( m_windowSize.x + 1 );
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m_up_nY.resize( m_windowSize.y + 1 );
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// Precalc X values for camera -> ray generation
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const SFVEC3F right_nw = m_right * m_frustum.nw;
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for( unsigned int x = 0; x < ( (unsigned int) m_windowSize.x + 1 ); ++x )
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m_right_nX[x] = right_nw * m_scr_nX[x];
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// Precalc Y values for camera -> ray generation
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const SFVEC3F up_nh = m_up * m_frustum.nh;
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for( unsigned int y = 0; y < ( (unsigned int) m_windowSize.y + 1 ); ++y )
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m_up_nY[y] = up_nh * m_scr_nY[y];
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}
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}
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void CAMERA::MakeRay( const SFVEC2I& aWindowPos, SFVEC3F& aOutOrigin,
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SFVEC3F& aOutDirection ) const
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{
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wxASSERT( aWindowPos.x < m_windowSize.x );
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wxASSERT( aWindowPos.y < m_windowSize.y );
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const SFVEC3F up_plus_right = m_up_nY[aWindowPos.y] + m_right_nX[aWindowPos.x];
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switch( m_projectionType )
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{
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default:
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case PROJECTION_TYPE::PERSPECTIVE:
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aOutOrigin = up_plus_right + m_frustum.nc;
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aOutDirection = glm::normalize( aOutOrigin - m_pos );
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break;
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case PROJECTION_TYPE::ORTHO:
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aOutOrigin = up_plus_right * 0.5f + m_frustum.nc;
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aOutDirection = -m_dir + SFVEC3F( FLT_EPSILON );
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break;
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}
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}
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void CAMERA::MakeRay( const SFVEC2F& aWindowPos, SFVEC3F& aOutOrigin,
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SFVEC3F& aOutDirection ) const
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{
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wxASSERT( aWindowPos.x < (float)m_windowSize.x );
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wxASSERT( aWindowPos.y < (float)m_windowSize.y );
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const SFVEC2F floorWinPos_f = glm::floor( aWindowPos );
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const SFVEC2I floorWinPos_i = (SFVEC2I)floorWinPos_f;
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const SFVEC2F relativeWinPos = aWindowPos - floorWinPos_f;
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// Note: size of vectors m_up and m_right are m_windowSize + 1
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const SFVEC3F up_plus_right = m_up_nY[floorWinPos_i.y] * (1.0f - relativeWinPos.y) +
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m_up_nY[floorWinPos_i.y + 1] * relativeWinPos.y +
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m_right_nX[floorWinPos_i.x] * (1.0f - relativeWinPos.x) +
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m_right_nX[floorWinPos_i.x + 1] * relativeWinPos.x;
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switch( m_projectionType )
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{
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default:
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case PROJECTION_TYPE::PERSPECTIVE:
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aOutOrigin = up_plus_right + m_frustum.nc;
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aOutDirection = glm::normalize( aOutOrigin - m_pos );
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break;
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case PROJECTION_TYPE::ORTHO:
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aOutOrigin = up_plus_right * 0.5f + m_frustum.nc;
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aOutDirection = -m_dir + SFVEC3F( FLT_EPSILON );
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break;
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}
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}
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void CAMERA::MakeRayAtCurrrentMousePosition( SFVEC3F& aOutOrigin, SFVEC3F& aOutDirection ) const
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{
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const SFVEC2I windowPos = SFVEC2I( m_lastPosition.x, m_windowSize.y - m_lastPosition.y );
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if( ( 0 < windowPos.x ) && ( windowPos.x < m_windowSize.x ) &&
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( 0 < windowPos.y ) && ( windowPos.y < m_windowSize.y ) )
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{
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MakeRay( windowPos, aOutOrigin, aOutDirection );
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}
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}
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const glm::mat4& CAMERA::GetProjectionMatrix() const
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{
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return m_projectionMatrix;
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}
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const glm::mat4& CAMERA::GetProjectionMatrixInv() const
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{
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return m_projectionMatrixInv;
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}
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void CAMERA::ResetXYpos()
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{
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m_parametersChanged = true;
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m_camera_pos.x = 0.0f;
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m_camera_pos.y = 0.0f;
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updateViewMatrix();
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updateFrustum();
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}
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void CAMERA::ResetXYpos_T1()
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{
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m_camera_pos_t1.x = 0.0f;
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m_camera_pos_t1.y = 0.0f;
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}
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const glm::mat4& CAMERA::GetViewMatrix() const
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{
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return m_viewMatrix;
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}
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const glm::mat4& CAMERA::GetViewMatrix_Inv() const
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{
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return m_viewMatrixInverse;
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}
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void CAMERA::SetCurMousePosition( const wxPoint& aNewMousePosition )
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{
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m_lastPosition = aNewMousePosition;
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}
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void CAMERA::ToggleProjection()
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{
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if( m_projectionType == PROJECTION_TYPE::ORTHO )
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m_projectionType = PROJECTION_TYPE::PERSPECTIVE;
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else
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m_projectionType = PROJECTION_TYPE::ORTHO;
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rebuildProjection();
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}
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bool CAMERA::SetCurWindowSize( const wxSize& aSize )
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{
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const SFVEC2I newSize = SFVEC2I( aSize.x, aSize.y );
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if( m_windowSize != newSize )
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{
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m_windowSize = newSize;
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rebuildProjection();
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return true;
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}
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return false;
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}
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void CAMERA::ZoomReset()
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{
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m_zoom = 1.0f;
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m_camera_pos.z = m_camera_pos_init.z;
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updateViewMatrix();
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rebuildProjection();
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}
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bool CAMERA::Zoom( float aFactor )
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{
|
|
if( ( m_zoom == MIN_ZOOM && aFactor > 1 ) || ( m_zoom == MAX_ZOOM && aFactor < 1 )
|
|
|| aFactor == 1 )
|
|
return false;
|
|
|
|
m_zoom /= aFactor;
|
|
|
|
if( m_zoom <= MIN_ZOOM )
|
|
m_zoom = MIN_ZOOM;
|
|
|
|
if( m_zoom >= MAX_ZOOM )
|
|
m_zoom = MAX_ZOOM;
|
|
|
|
m_camera_pos.z = m_camera_pos_init.z * m_zoom;
|
|
|
|
updateViewMatrix();
|
|
rebuildProjection();
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool CAMERA::Zoom_T1( float aFactor )
|
|
{
|
|
if( ( m_zoom == MIN_ZOOM && aFactor > 1 ) || ( m_zoom == MAX_ZOOM && aFactor < 1 )
|
|
|| aFactor == 1 )
|
|
return false;
|
|
|
|
m_zoom_t1 = m_zoom / aFactor;
|
|
|
|
if( m_zoom_t1 < MIN_ZOOM )
|
|
m_zoom_t1 = MIN_ZOOM;
|
|
|
|
if( m_zoom_t1 > MAX_ZOOM )
|
|
m_zoom_t1 = MAX_ZOOM;
|
|
|
|
m_camera_pos_t1.z = m_camera_pos_init.z * m_zoom_t1;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
float CAMERA::ZoomGet() const
|
|
{
|
|
return m_zoom;
|
|
}
|
|
|
|
|
|
void CAMERA::RotateX( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux.x += aAngleInRadians;
|
|
updateRotationMatrix();
|
|
}
|
|
|
|
|
|
void CAMERA::RotateY( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux.y += aAngleInRadians;
|
|
updateRotationMatrix();
|
|
}
|
|
|
|
|
|
void CAMERA::RotateZ( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux.z += aAngleInRadians;
|
|
updateRotationMatrix();
|
|
}
|
|
|
|
|
|
void CAMERA::RotateX_T1( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux_t1.x += aAngleInRadians;
|
|
}
|
|
|
|
|
|
void CAMERA::RotateY_T1( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux_t1.y += aAngleInRadians;
|
|
}
|
|
|
|
|
|
void CAMERA::RotateZ_T1( float aAngleInRadians )
|
|
{
|
|
m_rotate_aux_t1.z += aAngleInRadians;
|
|
}
|
|
|
|
|
|
void CAMERA::SetT0_and_T1_current_T()
|
|
{
|
|
m_camera_pos_t0 = m_camera_pos;
|
|
m_lookat_pos_t0 = m_lookat_pos;
|
|
m_rotate_aux_t0 = m_rotate_aux;
|
|
m_zoom_t0 = m_zoom;
|
|
|
|
m_camera_pos_t1 = m_camera_pos;
|
|
m_lookat_pos_t1 = m_lookat_pos;
|
|
m_rotate_aux_t1 = m_rotate_aux;
|
|
m_zoom_t1 = m_zoom;
|
|
}
|
|
|
|
|
|
void CAMERA::Interpolate( float t )
|
|
{
|
|
wxASSERT( t >= 0.0f );
|
|
|
|
const float t0 = 1.0f - t;
|
|
|
|
m_camera_pos = m_camera_pos_t0 * t0 + m_camera_pos_t1 * t;
|
|
m_lookat_pos = m_lookat_pos_t0 * t0 + m_lookat_pos_t1 * t;
|
|
m_rotate_aux = m_rotate_aux_t0 * t0 + m_rotate_aux_t1 * t;
|
|
m_zoom = m_zoom_t0 * t0 + m_zoom_t1 * t;
|
|
|
|
m_parametersChanged = true;
|
|
|
|
updateRotationMatrix();
|
|
rebuildProjection();
|
|
}
|
|
|
|
|
|
bool CAMERA::ParametersChanged()
|
|
{
|
|
const bool parametersChanged = m_parametersChanged;
|
|
|
|
m_parametersChanged = false;
|
|
|
|
return parametersChanged;
|
|
}
|