380 lines
12 KiB
C++
380 lines
12 KiB
C++
/*
|
|
* file: vrml_board.h
|
|
*
|
|
* This program source code file is part of KiCad, a free EDA CAD application.
|
|
*
|
|
* Copyright (C) 2013 Cirilo Bernardo
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file vrml_board.h
|
|
*/
|
|
|
|
/*
|
|
* Classes and structures to support the tesselation of a
|
|
* PCB for VRML output.
|
|
*/
|
|
|
|
#ifndef VRML_BOARD_H
|
|
#define VRML_BOARD_H
|
|
|
|
#ifdef __WXMAC__
|
|
# ifdef __DARWIN__
|
|
# include <OpenGL/glu.h>
|
|
# else
|
|
# include <glu.h>
|
|
# endif
|
|
#else
|
|
# include <GL/glu.h>
|
|
#endif
|
|
|
|
#include <cstdio>
|
|
#include <vector>
|
|
#include <list>
|
|
#include <utility>
|
|
|
|
#ifndef M_PI2
|
|
#define M_PI2 ( M_PI / 2.0 )
|
|
#endif
|
|
|
|
#ifndef M_PI4
|
|
#define M_PI4 ( M_PI / 4.0 )
|
|
#endif
|
|
|
|
struct GLUtesselator;
|
|
|
|
struct VERTEX_3D
|
|
{
|
|
double x;
|
|
double y;
|
|
int i; // vertex index
|
|
int o; // vertex order
|
|
};
|
|
|
|
struct TRIPLET_3D
|
|
{
|
|
int i1, i2, i3;
|
|
|
|
TRIPLET_3D( int p1, int p2, int p3 )
|
|
{
|
|
i1 = p1;
|
|
i2 = p2;
|
|
i3 = p3;
|
|
}
|
|
};
|
|
|
|
|
|
class VRML_LAYER
|
|
{
|
|
private:
|
|
bool fix; // when true, no more vertices may be added by the user
|
|
int idx; // vertex index (number of contained vertices)
|
|
int ord; // vertex order (number of ordered vertices)
|
|
std::vector<VERTEX_3D*> vertices; // vertices of all contours
|
|
std::vector<std::list<int>*> contours; // lists of vertices for each contour
|
|
std::vector< double > areas; // area of the contours (positive if winding is CCW)
|
|
std::list<TRIPLET_3D> triplets; // output facet triplet list (triplet of ORDER values)
|
|
std::list<std::list<int>*> outline; // indices for outline outputs (index by ORDER values)
|
|
std::vector<int> ordmap; // mapping of ORDER to INDEX
|
|
|
|
std::string error; // error message
|
|
|
|
double maxdev; // max. deviation from circle when calculating N sides
|
|
|
|
int hidx; // number of vertices in the holes
|
|
int eidx; // index for extra vertices
|
|
std::vector<VERTEX_3D*> extra_verts; // extra vertices added for outlines and facets
|
|
std::vector<VERTEX_3D*> vlist; // vertex list for the GL command in progress
|
|
VRML_LAYER* pholes; // pointer to another layer object used for tesselation;
|
|
// this object is normally expected to hold only holes
|
|
|
|
GLUtesselator* tess; // local instance of the GLU tesselator
|
|
|
|
GLenum glcmd; // current GL command type ( fan, triangle, tri-strip, loop )
|
|
|
|
void clearTmp( void ); // clear ephemeral data used by the tesselation routine
|
|
|
|
// add a triangular facet (triplet) to the output index list
|
|
bool addTriplet( VERTEX_3D* p0, VERTEX_3D* p1, VERTEX_3D* p2 );
|
|
|
|
// retrieve a vertex given its index; the vertex may be contained in the
|
|
// vertices vector, extra_verts vector, or foreign VRML_LAYER object
|
|
VERTEX_3D* getVertexByIndex( int index, VRML_LAYER* holes );
|
|
|
|
void processFan( void ); // process a GL_TRIANGLE_FAN list
|
|
void processStrip( void ); // process a GL_TRIANGLE_STRIP list
|
|
void processTri( void ); // process a GL_TRIANGLES list
|
|
|
|
void pushVertices( bool holes ); // push the internal vertices
|
|
bool pushOutline( VRML_LAYER* holes ); // push the outline vertices
|
|
|
|
public:
|
|
/// set to true when a fault is encountered during tesselation
|
|
bool Fault;
|
|
|
|
VRML_LAYER();
|
|
virtual ~VRML_LAYER();
|
|
|
|
/**
|
|
* Function Clear
|
|
* erases all data.
|
|
*/
|
|
void Clear( void );
|
|
|
|
/**
|
|
* Function GetSize
|
|
* returns the total number of vertices indexed
|
|
*/
|
|
int GetSize( void );
|
|
|
|
/**
|
|
* Function SetMaxDev
|
|
* sets the maximum deviation from a circle; this parameter is
|
|
* used for the automatic calculation of segments within a
|
|
* circle or an arc.
|
|
*
|
|
* @param max is the maximum deviation from a perfect circle or arc;
|
|
* minimum value is 0.000002 units
|
|
*
|
|
* @return bool: true if the value was accepted
|
|
*/
|
|
bool SetMaxDev( double max );
|
|
|
|
/**
|
|
* Function NewContour
|
|
* creates a new list of vertices and returns an index to the list
|
|
*
|
|
* @return int: index to the list or -1 if the operation failed
|
|
*/
|
|
int NewContour( void );
|
|
|
|
/**
|
|
* Function AddVertex
|
|
* adds a point to the requested contour
|
|
*
|
|
* @param aContour is an index previously returned by a call to NewContour()
|
|
* @param x is the X coordinate of the vertex
|
|
* @param y is the Y coordinate of the vertex
|
|
*
|
|
* @return bool: true if the vertex was added
|
|
*/
|
|
bool AddVertex( int aContour, double x, double y );
|
|
|
|
/**
|
|
* Function EnsureWinding
|
|
* checks the winding of a contour and ensures that it is a hole or
|
|
* a solid depending on the value of @param hole
|
|
*
|
|
* @param aContour is an index to a contour as returned by NewContour()
|
|
* @param hole determines if the contour must be a hole
|
|
*
|
|
* @return bool: true if the operation suceeded
|
|
*/
|
|
bool EnsureWinding( int aContour, bool hole );
|
|
|
|
/**
|
|
* Function AddCircle
|
|
* creates a circular contour and adds it to the internal list
|
|
*
|
|
* @param x is the X coordinate of the hole center
|
|
* @param y is the Y coordinate of the hole center
|
|
* @param rad is the radius of the hole
|
|
* @param csides is the number of sides (segments) in a circle;
|
|
* use a value of 1 to automatically calculate a suitable number.
|
|
* @param hole determines if the contour to be created is a cutout
|
|
*
|
|
* @return bool: true if the new contour was successfully created
|
|
*/
|
|
bool AddCircle( double x, double y, double rad, int csides, bool hole = false );
|
|
|
|
/**
|
|
* Function AddSlot
|
|
* creates and adds a slot feature to the list of contours
|
|
*
|
|
* @param cx is the X coordinate of the slot
|
|
* @param cy is the Y coordinate of the slot
|
|
* @param length is the length of the slot along the major axis
|
|
* @param width is the width of the slot along the minor axis
|
|
* @param angle (radians) is the orientation of the slot
|
|
* @param csides is the number of sides to a circle; use 1 to
|
|
* take advantage of automatic calculations.
|
|
* @param hole determines whether the slot is a hole or a solid
|
|
*
|
|
* @return bool: true if the slot was successfully created
|
|
*/
|
|
bool AddSlot( double cx, double cy, double length, double width,
|
|
double angle, int csides, bool hole = false );
|
|
|
|
/**
|
|
* Function AddArc
|
|
* creates an arc and adds it to the internal list of contours
|
|
*
|
|
* @param cx is the X coordinate of the arc's center
|
|
* @param cy is the Y coordinate of the arc's center
|
|
* @param startx is the X coordinate of the starting point
|
|
* @param starty is the Y coordinate of the starting point
|
|
* @param width is the width of the arc
|
|
* @param angle is the included angle
|
|
* @param csides is the number of segments in a circle; use 1
|
|
* to take advantage of automatic calculations of this number
|
|
* @param hole determined whether the arc is to be a hole or a solid
|
|
*
|
|
* @return bool: true if the feature was successfully created
|
|
*/
|
|
bool AddArc( double cx, double cy, double startx, double starty,
|
|
double width, double angle, int csides, bool hole = false );
|
|
|
|
|
|
/**
|
|
* Function Tesselate
|
|
* creates a list of outline vertices as well as the
|
|
* vertex sets required to render the surface.
|
|
*
|
|
* @param holes is a pointer to cutouts to be imposed on the
|
|
* surface.
|
|
*
|
|
* @return bool: true if the operation succeeded
|
|
*/
|
|
bool Tesselate( VRML_LAYER* holes );
|
|
|
|
/**
|
|
* Function WriteVertices
|
|
* writes out the list of vertices required to render a
|
|
* planar surface.
|
|
*
|
|
* @param z is the Z coordinate of the plane
|
|
* @param fp is the file to write to
|
|
*
|
|
* @return bool: true if the operation succeeded
|
|
*/
|
|
bool WriteVertices( double z, FILE* fp );
|
|
|
|
/**
|
|
* Function Write3DVertices
|
|
* writes out the list of vertices required to render an extruded solid
|
|
*
|
|
* @param top is the Z coordinate of the top plane
|
|
* @param bottom is the Z coordinate of the bottom plane
|
|
* @param fp is the file to write to
|
|
*
|
|
* @return bool: true if the operation succeeded
|
|
*/
|
|
bool Write3DVertices( double top, double bottom, FILE* fp );
|
|
|
|
/**
|
|
* Function WriteIndices
|
|
* writes out the vertex sets required to render a planar
|
|
* surface.
|
|
*
|
|
* @param top is true if the surface is to be visible from above;
|
|
* if false the surface will be visible from below.
|
|
* @param fp is the file to write to
|
|
*
|
|
* @return bool: true if the operation succeeded
|
|
*/
|
|
bool WriteIndices( bool top, FILE* fp );
|
|
|
|
/**
|
|
* Function Write3DIndices
|
|
* writes out the vertex sets required to render an extruded solid
|
|
*
|
|
* @param fp is the file to write to
|
|
*
|
|
* @return bool: true if the operation succeeded
|
|
*/
|
|
bool Write3DIndices( FILE* fp );
|
|
|
|
/**
|
|
* Function AddExtraVertex
|
|
* adds an extra vertex as required by the GLU tesselator
|
|
*
|
|
* @return VERTEX_3D*: is the new vertex or NULL if a vertex
|
|
* could not be created.
|
|
*/
|
|
VERTEX_3D* AddExtraVertex( double x, double y );
|
|
|
|
/**
|
|
* Function glStart
|
|
* is invoked by the GLU tesselator callback to notify this object
|
|
* of the type of GL command which is applicable to the upcoming
|
|
* vertex list.
|
|
*
|
|
* @param cmd is the GL command
|
|
*/
|
|
void glStart( GLenum cmd );
|
|
|
|
/**
|
|
* Function glPushVertex
|
|
* is invoked by the GLU tesselator callback; the supplied vertex is
|
|
* added to the internal list of vertices awaiting processing upon
|
|
* execution of glEnd()
|
|
*
|
|
* @param vertex is a vertex forming part of the GL command as previously
|
|
* set by glStart
|
|
*/
|
|
void glPushVertex( VERTEX_3D* vertex );
|
|
|
|
/**
|
|
* Function glEnd
|
|
* is invoked by the GLU tesselator callback to notify this object
|
|
* that the vertex list is complete and ready for processing
|
|
*/
|
|
void glEnd( void );
|
|
|
|
/**
|
|
* Function SetGLError
|
|
* sets the error message according to the specified OpenGL error
|
|
*/
|
|
void SetGLError( GLenum error_id );
|
|
|
|
/**
|
|
* Function Import
|
|
* inserts all contours into the given tesselator; this
|
|
* results in the renumbering of all vertices from @param start.
|
|
* Take care when using this call since tesselators cannot work on
|
|
* the internal data concurrently.
|
|
*
|
|
* @param start is the starting number for vertex indices
|
|
* @param tess is a pointer to a GLU Tesselator object
|
|
*
|
|
* @return int: the number of vertices exported
|
|
*/
|
|
int Import( int start, GLUtesselator* tess );
|
|
|
|
/**
|
|
* Function GetVertexByIndex
|
|
* returns a pointer to the requested vertex or
|
|
* NULL if no such vertex exists.
|
|
*
|
|
* @param ptindex is a vertex index
|
|
*
|
|
* @return VERTEX_3D*: the requested vertex or NULL
|
|
*/
|
|
VERTEX_3D* GetVertexByIndex( int ptindex );
|
|
|
|
/*
|
|
* Function GetError
|
|
* Returns the error message related to the last failed operation
|
|
*/
|
|
const std::string& GetError( void );
|
|
};
|
|
|
|
#endif // VRML_BOARD_H
|