/********************/ /**** rs274d.cpp ****/ /********************/ #include #include #include #include #include #include #include #include /* Gerber: NOTES about some important commands found in RS274D and RS274X (G codes): * Gn = * G01 linear interpolation (right trace) * G02, G20, G21 Circular interpolation, meaning trig <0 (clockwise) * G03, G30, G31 Circular interpolation, meaning trigo> 0 (counterclockwise) * G04 = comment * G06 parabolic interpolation * G07 Cubic Interpolation * G10 linear interpolation (scale x10) * G11 linear interpolation (0.1x range) * G12 linear interpolation (0.01x scale) * G36 Start polygon mode * G37 Stop polygon mode (and close it) * G54 Selection Tool * G60 linear interpolation (scale x100) * G70 Select Units = Inches * G71 Select Units = Millimeters * G74 disable 360 degrees circular interpolation (return to 90 deg mode) * and perhaps circular interpolation (return to linear interpolation ) * see rs274xrevd_e.pdf pages 47 and 48 * Unfortunately page 47 said G74 disable G02 or G03 * and page 48 said G01 must be used to disable G02 or G03. * Currently GerbView disable G02 or G03 after a G74 command (tests using 2 gerber files). * G75 enable 360 degrees circular interpolation * G90 mode absolute coordinates * * X, Y * X and Y are followed by + or - and m + n digits (not separated) * m = integer part * n = part after the comma * Classic formats: m = 2, n = 3 (size 2.3) * m = 3, n = 4 (size 3.4) * eg * GxxX00345Y-06123* * * Tools and D_CODES * Tool number (identification of shapes) * 10 to 999 * D_CODES: * D01 ... D9 = command codes: * D01 = activating light (pen down) when placement * D02 = light extinction (pen up) when placement * D03 = Flash * D09 = VAPE Flash (I never see this command in gerber file) * D51 = G54 preceded by -> Select VAPE * * D10 ... D999 = Identification Tool: tool selection */ // Photoplot actions: #define GERB_ACTIVE_DRAW 1 // Activate light (lower pen) #define GERB_STOP_DRAW 2 // Extinguish light (lift pen) #define GERB_FLASH 3 // Flash /* Local Functions (are lower case since they are private to this source file) **/ /** * Function fillFlashedGBRITEM * initializes a given GBRITEM so that it can draw a circle which is filled and * has no pen border. * * @param aGbrItem The GBRITEM to fill in. * @param aAperture the associated type of aperture * @param Dcode_index The DCODE value, like D14 * @param aLayer The layer index to set into the GBRITEM * @param aPos The center point of the flash * @param aSize The diameter of the round flash * @param aLayerNegative = true if the current layer is negative */ void fillFlashedGBRITEM( GERBER_DRAW_ITEM* aGbrItem, APERTURE_T aAperture, int Dcode_index, int aLayer, const wxPoint& aPos, wxSize aSize, bool aLayerNegative ) { aGbrItem->SetLayer( aLayer ); aGbrItem->m_Size = aSize; aGbrItem->m_Start = aPos; aGbrItem->m_End = aGbrItem->m_Start; aGbrItem->m_DCode = Dcode_index; aGbrItem->SetLayerPolarity( aLayerNegative ); aGbrItem->m_Flashed = true; switch( aAperture ) { case APT_POLYGON: // flashed regular polygon aGbrItem->m_Shape = GBR_SPOT_POLY; break; case APT_CIRCLE: aGbrItem->m_Shape = GBR_SPOT_CIRCLE; aGbrItem->m_Size.y = aGbrItem->m_Size.x; break; case APT_OVAL: aGbrItem->m_Shape = GBR_SPOT_OVAL; break; case APT_RECT: aGbrItem->m_Shape = GBR_SPOT_RECT; break; case APT_MACRO: aGbrItem->m_Shape = GBR_SPOT_MACRO; break; } } /** * Function fillLineGBRITEM * initializes a given GBRITEM so that it can draw a linear D code. * * @param aGbrItem The GERBER_DRAW_ITEM to fill in. * @param Dcode_index The DCODE value, like D14 * @param aLayer The layer index to set into the GBRITEM * @param aStart The starting point of the line * @param aEnd The ending point of the line * @param aPenSize The size of the flash. Note rectangular shapes are legal. * @param aLayerNegative = true if the current layer is negative */ void fillLineGBRITEM( GERBER_DRAW_ITEM* aGbrItem, int Dcode_index, int aLayer, const wxPoint& aStart, const wxPoint& aEnd, wxSize aPenSize, bool aLayerNegative ) { aGbrItem->SetLayer( aLayer ); aGbrItem->m_Flashed = false; aGbrItem->m_Size = aPenSize; aGbrItem->m_Start = aStart; aGbrItem->m_End = aEnd; aGbrItem->m_DCode = Dcode_index; aGbrItem->SetLayerPolarity( aLayerNegative ); } /** * Function fillArcGBRITEM * initializes a given GBRITEM so that it can draw an arc G code. *

* if multiquadrant == true : arc can be 0 to 360 degrees * and \a rel_center is the center coordinate relative to start point. *

* if multiquadrant == false arc can be only 0 to 90 deg, * and only in the same quadrant : *

    *
  • absolute angle 0 to 90 (quadrant 1) or *
  • absolute angle 90 to 180 (quadrant 2) or *
  • absolute angle 180 to 270 (quadrant 3) or *
  • absolute angle 270 to 0 (quadrant 4) *

* @param aGbrItem is the GBRITEM to fill in. * @param Dcode_index is the DCODE value, like D14 * @param aLayer is the layer index to set into the GBRITEM * @param aStart is the starting point * @param aEnd is the ending point * @param aRelCenter is the center coordinate relative to start point, * given in ABSOLUTE VALUE and the sign of values x et y de rel_center * must be calculated from the previously given constraint: arc only in the * same quadrant. * @param aClockwise true if arc must be created clockwise * @param aPenSize The size of the flash. Note rectangular shapes are legal. * @param aMultiquadrant = true to create arcs upto 360 deg, * false when arc is inside one quadrant * @param aLayerNegative = true if the current layer is negative */ static void fillArcGBRITEM( GERBER_DRAW_ITEM* aGbrItem, int Dcode_index, int aLayer, const wxPoint& aStart, const wxPoint& aEnd, const wxPoint& aRelCenter, wxSize aPenSize, bool aClockwise, bool aMultiquadrant, bool aLayerNegative ) { wxPoint center, delta; aGbrItem->m_Shape = GBR_ARC; aGbrItem->SetLayer( aLayer ); aGbrItem->m_Size = aPenSize; aGbrItem->m_Flashed = false; if( aMultiquadrant ) center = aStart + aRelCenter; else { // in single quadrant mode the relative coordinate aRelCenter is always >= 0 // So we must recalculate the actual sign of aRelCenter.x and aRelCenter.y center = aRelCenter; // calculate arc end coordinate relative to the starting point, // because center is relative to the center point delta = aEnd - aStart; // now calculate the relative to aStart center position, for a draw function // that use trigonometric arc angle (or counter-clockwise) /* Quadrants: * Y * 2 | 1 * -------X * 3 | 4 * C = actual relative arc center, S = arc start (axis origin) E = relative arc end */ if( (delta.x >= 0) && (delta.y >= 0) ) { /* Quadrant 1 (trigo or cclockwise): * C | E * ---S--- * 3 | 4 */ NEGATE( center.x); } else if( (delta.x >= 0) && (delta.y < 0) ) { /* Quadrant 4 (trigo or cclockwise): * 2 | C * ---S--- * 3 | E */ // Nothing to do } else if( (delta.x < 0) && (delta.y >= 0) ) { /* Quadrant 2 (trigo or cclockwise): * E | 1 * ---S--- * C | 4 */ NEGATE( center.x); NEGATE( center.y); } else { /* Quadrant 3 (trigo or cclockwise): * 2 | 1 * ---S--- * E | C */ NEGATE( center.y); } // Due to your draw arc function, we need this: if( !aClockwise ) center = - center; // Calculate actual arc center coordinate: center += aStart; } if( aClockwise ) { aGbrItem->m_Start = aStart; aGbrItem->m_End = aEnd; } else { aGbrItem->m_Start = aEnd; aGbrItem->m_End = aStart; } aGbrItem->m_ArcCentre = center; aGbrItem->m_DCode = Dcode_index; aGbrItem->SetLayerPolarity( aLayerNegative ); } /** * Function fillArcPOLY * creates an arc G code when found in poly outlines. *

* if multiquadrant == true : arc can be 0 to 360 degrees * and \a rel_center is the center coordinate relative to start point. *

* if multiquadrant == false arc can be only 0 to 90 deg, * and only in the same quadrant : *

    *
  • absolute angle 0 to 90 (quadrant 1) or *
  • absolute angle 90 to 180 (quadrant 2) or *
  • absolute angle 180 to 270 (quadrant 3) or *
  • absolute angle 270 to 0 (quadrant 4) *

* @param aPcb is the board. * @param aGbrItem is the GBRITEM to fill in. * @param aStart is the starting point * @param aEnd is the ending point * @param rel_center is the center coordinate relative to start point, * given in ABSOLUTE VALUE and the sign of values x et y de rel_center * must be calculated from the previously given constraint: arc only in the * same quadrant. * @param aClockwise true if arc must be created clockwise * @param aMultiquadrant = true to create arcs upto 360 deg, * false when arc is inside one quadrant * @param aLayerNegative = true if the current layer is negative */ static void fillArcPOLY( BOARD* aPcb, GERBER_DRAW_ITEM* aGbrItem, const wxPoint& aStart, const wxPoint& aEnd, const wxPoint& rel_center, bool aClockwise, bool aMultiquadrant, bool aLayerNegative ) { /* in order to calculate arc parameters, we use fillArcGBRITEM * so we muse create a dummy track and use its geometric parameters */ static GERBER_DRAW_ITEM dummyGbrItem( NULL, NULL ); aGbrItem->SetLayerPolarity( aLayerNegative ); fillArcGBRITEM( &dummyGbrItem, 0, 0, aStart, aEnd, rel_center, wxSize(0, 0), aClockwise, aMultiquadrant, aLayerNegative ); wxPoint center; center = dummyGbrItem.m_ArcCentre; // Calculate coordinates relative to arc center; wxPoint start = dummyGbrItem.m_Start - center; wxPoint end = dummyGbrItem.m_End - center; /* Calculate angle arc * angles are in 0.1 deg * angle is trigonometrical (counter-clockwise), * and axis is the X,Y gerber coordinates */ int start_angle = wxRound(atan2( (double) start.y, (double) start.x ) * 1800 / M_PI); int end_angle = wxRound(atan2( (double) end.y, (double) end.x ) * 1800 / M_PI); // dummyTrack has right geometric parameters, but // fillArcGBRITEM calculates arc parameters for a draw function that expects // start_angle < end_angle. So ensure this is the case here: // Due to the fact atan2 returns angles between -180 to + 180 degrees, // this is not always the case ( a modulo 360.0 degrees can be lost ) if( start_angle > end_angle ) end_angle += 3600; int arc_angle = start_angle - end_angle; // Approximate arc by 36 segments per 360 degree const int increment_angle = 3600 / 36; int count = ABS( arc_angle / increment_angle ); // calculate polygon corners // when arc is counter-clockwise, dummyGbrItem arc goes from end to start // and we must always create a polygon from start to end. wxPoint start_arc = start; for( int ii = 0; ii <= count; ii++ ) { int rot; wxPoint end_arc = start; if( aClockwise ) rot = ii * increment_angle; // rot is in 0.1 deg else rot = (count - ii) * increment_angle; // rot is in 0.1 deg if( ii < count ) RotatePoint( &end_arc, -rot ); else // last point end_arc = aClockwise ? end : start; aGbrItem->m_PolyCorners.push_back( end_arc + center ); start_arc = end_arc; } } /* Read the Gnn sequence and returns the value nn. */ int GERBER_IMAGE::ReturnGCodeNumber( char*& Text ) { int ii = 0; char* text; char line[1024]; if( Text == NULL ) return 0; Text++; text = line; while( IsNumber( *Text ) ) { *(text++) = *(Text++); } *text = 0; ii = atoi( line ); return ii; } /* Get the sequence Dnn and returns the value nn */ int GERBER_IMAGE::ReturnDCodeNumber( char*& Text ) { int ii = 0; char* text; char line[1024]; if( Text == NULL ) return 0; Text++; text = line; while( IsNumber( *Text ) ) *(text++) = *(Text++); *text = 0; ii = atoi( line ); return ii; } bool GERBER_IMAGE::Execute_G_Command( char*& text, int G_command ) { // D( printf( "%22s: G_CODE<%d>\n", __func__, G_command ); ) switch( G_command ) { case GC_PHOTO_MODE: // can starts a D03 flash command: redundant, can // be safely ignored break; case GC_LINEAR_INTERPOL_1X: m_Iterpolation = GERB_INTERPOL_LINEAR_1X; break; case GC_CIRCLE_NEG_INTERPOL: m_Iterpolation = GERB_INTERPOL_ARC_NEG; break; case GC_CIRCLE_POS_INTERPOL: m_Iterpolation = GERB_INTERPOL_ARC_POS; break; case GC_COMMENT: // Skip comment while ( *text && (*text != '*') ) text++; break; case GC_LINEAR_INTERPOL_10X: m_Iterpolation = GERB_INTERPOL_LINEAR_10X; break; case GC_LINEAR_INTERPOL_0P1X: m_Iterpolation = GERB_INTERPOL_LINEAR_01X; break; case GC_LINEAR_INTERPOL_0P01X: m_Iterpolation = GERB_INTERPOL_LINEAR_001X; break; case GC_SELECT_TOOL: { int D_commande = ReturnDCodeNumber( text ); if( D_commande < FIRST_DCODE ) return false; if( D_commande > (TOOLS_MAX_COUNT - 1) ) D_commande = TOOLS_MAX_COUNT - 1; m_Current_Tool = D_commande; D_CODE* pt_Dcode = GetDCODE( D_commande, false ); if( pt_Dcode ) pt_Dcode->m_InUse = true; break; } case GC_SPECIFY_INCHES: m_GerbMetric = false; // false = Inches, true = metric break; case GC_SPECIFY_MILLIMETERS: m_GerbMetric = true; // false = Inches, true = metric break; case GC_TURN_OFF_360_INTERPOL: // disable Multi cadran arc and Arc interpol m_360Arc_enbl = false; m_Iterpolation = GERB_INTERPOL_LINEAR_1X; // not sure it should be done break; case GC_TURN_ON_360_INTERPOL: m_360Arc_enbl = true; break; case GC_SPECIFY_ABSOLUES_COORD: m_Relative = false; // false = absolute Coord, true = relative // Coord break; case GC_SPECIFY_RELATIVEES_COORD: m_Relative = true; // false = absolute Coord, true = relative // Coord break; case GC_TURN_ON_POLY_FILL: m_PolygonFillMode = true; break; case GC_TURN_OFF_POLY_FILL: if( m_Exposure && m_Parent->GetBoard()->m_Drawings ) // End of polygon { GERBER_DRAW_ITEM * gbritem = (GERBER_DRAW_ITEM*)( m_Parent->GetBoard()->m_Drawings.GetLast() ); StepAndRepeatItem( *gbritem ); } m_Exposure = false; m_PolygonFillMode = false; m_PolygonFillModeState = 0; break; case GC_MOVE: // Non existent default: { wxString msg; msg.Printf( wxT( "G%0.2d command not handled" ), G_command ); ReportMessage( msg ); return false; } } return true; } /** * Function scale * converts a distance given in floating point to our deci-mils */ int scale( double aCoord, bool isMetric ) { int ret; if( isMetric ) ret = wxRound( aCoord / 0.00254 ); else ret = wxRound( aCoord * PCB_INTERNAL_UNIT ); return ret; } bool GERBER_IMAGE::Execute_DCODE_Command( char*& text, int D_commande ) { wxSize size( 15, 15 ); APERTURE_T aperture = APT_CIRCLE; GERBER_DRAW_ITEM* gbritem; BOARD* pcb = m_Parent->GetBoard(); int activeLayer = m_Parent->getActiveLayer(); int dcode = 0; D_CODE* tool = NULL; wxString msg; // D( printf( "%22s: D_CODE<%d>\n", __func__, D_commande ); ) if( D_commande >= FIRST_DCODE ) // This is a "Set tool" command { if( D_commande > (TOOLS_MAX_COUNT - 1) ) D_commande = TOOLS_MAX_COUNT - 1; // remember which tool is selected, nothing is done with it in this // call m_Current_Tool = D_commande; D_CODE* pt_Dcode = GetDCODE( D_commande, false ); if( pt_Dcode ) pt_Dcode->m_InUse = true; return true; } else // D_commande = 0..9: this is a pen command (usually D1, D2 or D3) { m_Last_Pen_Command = D_commande; } if( m_PolygonFillMode ) // Enter a polygon description: { switch( D_commande ) { case 1: // code D01 Draw line, exposure ON if( !m_Exposure ) { m_Exposure = true; gbritem = new GERBER_DRAW_ITEM( pcb, this ); pcb->m_Drawings.Append( gbritem ); gbritem->m_Shape = GBR_POLYGON; gbritem->SetLayer( activeLayer ); gbritem->m_Flashed = false; } switch( m_Iterpolation ) { case GERB_INTERPOL_ARC_NEG: case GERB_INTERPOL_ARC_POS: gbritem = (GERBER_DRAW_ITEM*)( pcb->m_Drawings.GetLast() ); // D( printf( "Add arc poly %d,%d to %d,%d fill %d interpol %d 360_enb %d\n", // m_PreviousPos.x, m_PreviousPos.y, m_CurrentPos.x, // m_CurrentPos.y, m_PolygonFillModeState, // m_Iterpolation, m_360Arc_enbl ); ) fillArcPOLY( pcb, gbritem, m_PreviousPos, m_CurrentPos, m_IJPos, ( m_Iterpolation == GERB_INTERPOL_ARC_NEG ) ? false : true, m_360Arc_enbl, GetLayerParams().m_LayerNegative ); break; default: gbritem = (GERBER_DRAW_ITEM*)( pcb->m_Drawings.GetLast() ); // D( printf( "Add poly edge %d,%d to %d,%d fill %d\n", // m_PreviousPos.x, m_PreviousPos.y, // m_CurrentPos.x, m_CurrentPos.y, m_Iterpolation ); ) gbritem->m_Start = m_PreviousPos; // m_Start is used as temporary storage if( gbritem->m_PolyCorners.size() == 0 ) gbritem->m_PolyCorners.push_back( gbritem->m_Start ); gbritem->m_End = m_CurrentPos; // m_End is used as temporary storage gbritem->m_PolyCorners.push_back( gbritem->m_End ); break; } m_PreviousPos = m_CurrentPos; m_PolygonFillModeState = 1; break; case 2: // code D2: exposure OFF (i.e. "move to") if( m_Exposure && pcb->m_Drawings ) // End of polygon { gbritem = (GERBER_DRAW_ITEM*)( pcb->m_Drawings.GetLast() ); StepAndRepeatItem( *gbritem ); } m_Exposure = false; m_PreviousPos = m_CurrentPos; m_PolygonFillModeState = 0; break; default: return false; } } else { switch( D_commande ) { case 1: // code D01 Draw line, exposure ON m_Exposure = true; tool = GetDCODE( m_Current_Tool, false ); if( tool ) { size = tool->m_Size; dcode = tool->m_Num_Dcode; aperture = tool->m_Shape; } switch( m_Iterpolation ) { case GERB_INTERPOL_LINEAR_1X: gbritem = new GERBER_DRAW_ITEM( pcb, this ); pcb->m_Drawings.Append( gbritem ); // D( printf( "Add line %d,%d to %d,%d\n", // m_PreviousPos.x, m_PreviousPos.y, // m_CurrentPos.x, m_CurrentPos.y ); ) fillLineGBRITEM( gbritem, dcode, activeLayer, m_PreviousPos, m_CurrentPos, size, GetLayerParams().m_LayerNegative ); StepAndRepeatItem( *gbritem ); break; case GERB_INTERPOL_LINEAR_01X: case GERB_INTERPOL_LINEAR_001X: case GERB_INTERPOL_LINEAR_10X: wxBell(); break; case GERB_INTERPOL_ARC_NEG: case GERB_INTERPOL_ARC_POS: gbritem = new GERBER_DRAW_ITEM( pcb, this ); pcb->m_Drawings.Append( gbritem ); // D( printf( "Add arc %d,%d to %d,%d center %d, %d interpol %d 360_enb %d\n", // m_PreviousPos.x, m_PreviousPos.y, m_CurrentPos.x, // m_CurrentPos.y, m_IJPos.x, // m_IJPos.y, m_Iterpolation, m_360Arc_enbl ); ) fillArcGBRITEM( gbritem, dcode, activeLayer, m_PreviousPos, m_CurrentPos, m_IJPos, size, ( m_Iterpolation == GERB_INTERPOL_ARC_NEG ) ? false : true, m_360Arc_enbl, GetLayerParams().m_LayerNegative ); StepAndRepeatItem( *gbritem ); break; default: msg.Printf( wxT( "RS274D: DCODE Command: interpol error (type %X)" ), m_Iterpolation ); ReportMessage( msg ); break; } m_PreviousPos = m_CurrentPos; break; case 2: // code D2: exposure OFF (i.e. "move to") m_Exposure = false; m_PreviousPos = m_CurrentPos; break; case 3: // code D3: flash aperture tool = GetDCODE( m_Current_Tool, false ); if( tool ) { size = tool->m_Size; dcode = tool->m_Num_Dcode; aperture = tool->m_Shape; } gbritem = new GERBER_DRAW_ITEM( pcb, this ); pcb->m_Drawings.Append( gbritem ); fillFlashedGBRITEM( gbritem, aperture, dcode, activeLayer, m_CurrentPos, size, GetLayerParams().m_LayerNegative ); StepAndRepeatItem( *gbritem ); m_PreviousPos = m_CurrentPos; break; default: return false; } } return true; }