opengl_utils.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015-2016 Mario Luzeiro <[email protected]>
 * Copyright (C) 1992-2022 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include "../../common_ogl/openGL_includes.h"
#include "opengl_utils.h"
#include <trigo.h>
#include <wx/debug.h> // For the wxASSERT
 
#define RADPERDEG 0.0174533f
 
void DrawRoundArrow( SFVEC3F aPosition, SFVEC3F aTargetPos, float aSize )
{
 wxASSERT( aSize > 0.0f );
 
 SFVEC3F vec = aTargetPos - aPosition;
 float length = glm::length( vec );
 
 GLUquadricObj *quadObj;
 
 glPushMatrix ();
 
 glTranslatef( aPosition.x, aPosition.y, aPosition.z );
 
 if( ( vec.x != 0.0f ) || ( vec.y != 0.0f ) )
 {
 glRotatef( atan2( vec.y, vec.x ) / RADPERDEG, 0.0f, 0.0f, 1.0f );
 glRotatef( atan2( sqrt( vec.x * vec.x + vec.y * vec.y ), vec.z ) / RADPERDEG,
 0.0f, 1.0f, 0.0f );
 
 }
 else if( vec.z < 0.0f )
 {
 glRotatef( 180.0f, 1.0f, 0.0f, 0.0f );
 }
 
 glTranslatef( 0.0f, 0.0f, length - 4.0f * aSize );
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluCylinder( quadObj, 2.0 * aSize, 0.0, 4.0 * aSize, 12, 1 );
 gluDeleteQuadric( quadObj );
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluDisk( quadObj, 0.0, 2.0 * aSize, 12, 1 );
 gluDeleteQuadric( quadObj );
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluDisk( quadObj, 0.0, aSize, 12, 1 );
 gluDeleteQuadric( quadObj );
 
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluSphere( quadObj, aSize, 24, 24 );
 gluDeleteQuadric( quadObj );
 
 glTranslatef( 0.0f , 0.0f ,-length + 4.0f * aSize );
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluCylinder( quadObj, aSize, aSize, length - 4.0 * aSize, 12, 1 );
 gluDeleteQuadric( quadObj );
 
 quadObj = gluNewQuadric();
 gluQuadricDrawStyle( quadObj, GLU_FILL );
 gluQuadricNormals( quadObj, GLU_SMOOTH );
 gluDisk( quadObj, 0.0, aSize, 12, 1 );
 gluDeleteQuadric( quadObj );
 
 glPopMatrix ();
}
 
 
void DrawBoundingBox( const BBOX_3D& aBBox )
{
 wxASSERT( aBBox.IsInitialized() );
 
 glBegin( GL_LINE_LOOP );
 glVertex3f( aBBox.Min().x, aBBox.Min().y, aBBox.Min().z );
 glVertex3f( aBBox.Max().x, aBBox.Min().y, aBBox.Min().z );
 glVertex3f( aBBox.Max().x, aBBox.Max().y, aBBox.Min().z );
 glVertex3f( aBBox.Min().x, aBBox.Max().y, aBBox.Min().z );
 glEnd();
 
 glBegin( GL_LINE_LOOP );
 glVertex3f( aBBox.Min().x, aBBox.Min().y, aBBox.Max().z );
 glVertex3f( aBBox.Max().x, aBBox.Min().y, aBBox.Max().z );
 glVertex3f( aBBox.Max().x, aBBox.Max().y, aBBox.Max().z );
 glVertex3f( aBBox.Min().x, aBBox.Max().y, aBBox.Max().z );
 glEnd();
 
 glBegin( GL_LINE_STRIP );
 glVertex3f( aBBox.Min().x, aBBox.Min().y, aBBox.Min().z );
 glVertex3f( aBBox.Min().x, aBBox.Min().y, aBBox.Max().z );
 glEnd();
 
 glBegin( GL_LINE_STRIP );
 glVertex3f( aBBox.Max().x, aBBox.Min().y, aBBox.Min().z );
 glVertex3f( aBBox.Max().x, aBBox.Min().y, aBBox.Max().z );
 glEnd();
 
 glBegin( GL_LINE_STRIP );
 glVertex3f( aBBox.Max().x, aBBox.Max().y, aBBox.Min().z );
 glVertex3f( aBBox.Max().x, aBBox.Max().y, aBBox.Max().z );
 glEnd();
 
 glBegin( GL_LINE_STRIP );
 glVertex3f( aBBox.Min().x, aBBox.Max().y, aBBox.Min().z );
 glVertex3f( aBBox.Min().x, aBBox.Max().y, aBBox.Max().z );
 glEnd();
}
 
 
void DrawHalfOpenCylinder( unsigned int aNrSidesPerCircle )
{
 if( aNrSidesPerCircle > 1 )
 {
 const float radius = 0.5f;
 const EDA_ANGLE delta = ANGLE_360 / aNrSidesPerCircle;
 
 // Generate bottom
 glNormal3f( 0.0f, 0.0f,-1.0f );
 glBegin( GL_TRIANGLE_FAN );
 glVertex3f( 0.0, 0.0, 0.0 ); // This is the V0 of the FAN
 
 for( EDA_ANGLE ii = ANGLE_0; ii < ANGLE_180; ii += delta )
 {
 SFVEC2D corner = SFVEC2D( 0.0, radius );
 RotatePoint( &corner.x, &corner.y, ii );
 glVertex3f( static_cast<GLfloat>( corner.x ), static_cast<GLfloat>( corner.y ), 0.0 );
 }
 
 glVertex3d( 0.0, -radius, 0.0 );
 glEnd();
 
 // Generate top
 glNormal3f( 0.0f, 0.0f, 1.0f );
 glBegin( GL_TRIANGLE_FAN );
 glVertex3f( 0.0, 0.0, 1.0 ); // This is the V0 of the FAN
 
 for( EDA_ANGLE ii = ANGLE_180; ii > ANGLE_0; ii -= delta )
 {
 SFVEC2D corner = SFVEC2D( 0.0, radius );
 
 RotatePoint( &corner.x, &corner.y, ii );
 glVertex3f( static_cast<GLfloat>( corner.x ), static_cast<GLfloat>( corner.y ), 1.0 );
 }
 
 glVertex3f( 0.0, radius, 1.0 );
 glEnd();
 
 // Generate contours
 glBegin( GL_QUAD_STRIP );
 
 for( EDA_ANGLE ii = ANGLE_180; ii > ANGLE_0; ii -= delta )
 {
 SFVEC2D corner = SFVEC2D( 0.0, radius );
 
 RotatePoint( &corner.x, &corner.y, ii );
 glNormal3f( static_cast<GLfloat>( corner.x * 2.0f ),
 static_cast<GLfloat>( corner.y * 2.0f ), 0.0f );
 glVertex3f( static_cast<GLfloat>( corner.x ), static_cast<GLfloat>( corner.y ), 1.0f );
 glVertex3f( static_cast<GLfloat>( corner.x ), static_cast<GLfloat>( corner.y ), 0.0f );
 }
 
 glNormal3f( 0.0, 1.0f, 0.0f );
 glVertex3d( 0.0, radius, 1.0 );
 glVertex3d( 0.0, radius, 0.0 );
 glEnd();
 }
}
 
 
void DrawSegment( const ROUND_SEGMENT_2D& aSegment, unsigned int aNrSidesPerCircle )
{
 glPushMatrix();
 
 const SFVEC2F& start = aSegment.GetStart();
 const SFVEC2F& end_minus_start = aSegment.GetEnd_minus_Start();
 const float radius = aSegment.GetRadius();
 const float width = aSegment.GetWidth();
 const float length = aSegment.GetLength();
 
 glTranslatef( start.x, start.y, 0.0f );
 
 if( ( end_minus_start.x != 0.0f ) || ( end_minus_start.y != 0.0f ) )
 {
 glRotatef( atan2( end_minus_start.y, end_minus_start.x ) / RADPERDEG, 0.0f, 0.0f, 1.0f );
 }
 
 glPushMatrix();
 glTranslatef( length, 0.0, 0.0f );
 glScalef( width, width, 1.0f );
 DrawHalfOpenCylinder( aNrSidesPerCircle );
 glPopMatrix();
 
 glBegin( GL_QUADS );
 glNormal3f( 0.0,-1.0, 0.0 );
 glVertex3f( length,-radius, 1.0 );
 glVertex3f( 0.0, -radius, 1.0 );
 glVertex3f( 0.0, -radius, 0.0 );
 glVertex3f( length,-radius, 0.0 );
 glEnd();
 
 glBegin( GL_QUADS );
 glNormal3f( 0.0, 1.0, 0.0 );
 glVertex3f( length, radius, 0.0 );
 glVertex3f( 0.0, radius, 0.0 );
 glVertex3f( 0.0, radius, 1.0 );
 glVertex3f( length, radius, 1.0 );
 glEnd();
 
 glBegin( GL_QUADS );
 glNormal3f( 0.0, 0.0, 1.0 );
 glVertex3f( length, radius, 1.0 );
 glVertex3f( 0.0, radius, 1.0 );
 glVertex3f( 0.0, -radius, 1.0 );
 glVertex3f( length,-radius, 1.0 );
 glEnd();
 
 glBegin( GL_QUADS );
 glNormal3f( 0.0, 0.0,-1.0 );
 glVertex3f( length,-radius, 0.0 );
 glVertex3f( 0.0, -radius, 0.0 );
 glVertex3f( 0.0, radius, 0.0 );
 glVertex3f( length, radius, 0.0 );
 glEnd();
 
 glScalef( width, width, 1.0f );
 glRotatef( 180, 0.0, 0.0, 1.0 );
 DrawHalfOpenCylinder( aNrSidesPerCircle );
 
 glPopMatrix ();
}