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kicad-source-mirror/3d-viewer/3d_rendering/opengl/opengl_utils.cpp
T
Alex Shvartzkop 3fa40e05dc Use GLAD for OpenGL loading instead of GLEW. 
This allows us to pick GLX on X11 and EGL on Wayland
at runtime when building with wxWidgets 3.3.2+

GLEW only allowed to choose between GLX/EGL at compile time.

This also removes KICAD_USE_EGL option, KiCad will use
whatever wxWidgets was built with.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/20647
2026-02-22 14:56:40 +03:00

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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 The 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 <kicad_gl/kiglu.h> // Must be included first
#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 ();
}
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