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IgSoGrid.cc

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//<<<<<< INCLUDES                                                       >>>>>>

#include "Iguana/Inventor/interface/IgSoGrid.h"
#include <Inventor/nodes/SoText2.h>
#include <Inventor/nodes/SoFont.h>
#include <Inventor/nodes/SoIndexedLineSet.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoTranslation.h>

//<<<<<< PRIVATE DEFINES                                                >>>>>>
//<<<<<< PRIVATE CONSTANTS                                              >>>>>>
//<<<<<< PRIVATE TYPES                                                  >>>>>>
//<<<<<< PRIVATE VARIABLE DEFINITIONS                                   >>>>>>
//<<<<<< PUBLIC VARIABLE DEFINITIONS                                    >>>>>>
//<<<<<< CLASS STRUCTURE INITIALIZATION                                 >>>>>>

SO_KIT_SOURCE (IgSoGrid);

//<<<<<< PRIVATE FUNCTION DEFINITIONS                                   >>>>>>
//<<<<<< PUBLIC FUNCTION DEFINITIONS                                    >>>>>>
//<<<<<< MEMBER FUNCTION DEFINITIONS                                    >>>>>>

void
IgSoGrid::initClass (void)
{ SO_KIT_INIT_CLASS (IgSoGrid, IgSoShapeKit, "IgSoShapeKit"); }


IgSoGrid::IgSoGrid (void)
{    
    SO_KIT_CONSTRUCTOR (IgSoGrid);
    SO_KIT_ADD_FIELD (maxX,             (5.0f));
    SO_KIT_ADD_FIELD (maxZ,             (5.0f));

    SO_KIT_ADD_CATALOG_ENTRY (xLabels,          SoSeparator,    FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (zLabels,          SoSeparator,    FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (grid,             SoIndexedLineSet, FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (font,             SoFont,         FALSE, separator,\x0, TRUE);
    SO_KIT_ADD_CATALOG_ENTRY (labels,           SoSeparator,    FALSE, separator,\x0, TRUE);

    SO_KIT_INIT_INSTANCE ();
    setUpConnections (true, true);
}

void
IgSoGrid::refresh (void)
{
    SoSeparator         *xLabels        = new SoSeparator;
    SoSeparator         *zLabels        = new SoSeparator;
    SoIndexedLineSet    *grid           = new SoIndexedLineSet;
    SoFont              *font           = new SoFont;

    SoVertexProperty    *vtx            = new SoVertexProperty;
    SoText2             *text;
    SoMFInt32           coords;

    float               xMax = maxZ.getValue ();
    float               zMax = maxX.getValue ();
    
    int                 vertex = 5;
    int                 coord = 0;

    vtx->vertex.set1Value (0, SbVec3f (-zMax, 0, -xMax));
    vtx->vertex.set1Value (1, SbVec3f (-zMax, 0,  xMax));
    vtx->vertex.set1Value (2, SbVec3f ( zMax, 0,  xMax));
    vtx->vertex.set1Value (3, SbVec3f ( zMax, 0, -xMax));
    vtx->vertex.set1Value (4, SbVec3f (-zMax, 0, -xMax));

    for (; coord < vertex; coord++)
        coords.set1Value (coord, coord);
    coords.set1Value (coord++, SO_END_LINE_INDEX);
        
    //  set up co-ords for grid lines at unit intervals in x and z
    float x = -zMax;
    float z = ceil (-xMax);

    SoTranslation       *xStart = new SoTranslation;
    SoTranslation       *xTranslation = new SoTranslation;
    int                 tick;
    
    int ticks = int (2 * abs (int (x)) + 1);

    xStart->translation = SbVec3f (x, 0, -z);
    xTranslation->translation = SbVec3f (1.0, 0.0, 0.0);
    xLabels->addChild (xStart);

    for (tick = 0; tick < ticks; tick++, x++)
    {
        vtx->vertex.set1Value (vertex, SbVec3f (x, 0, -z));
        coords.set1Value (coord++, vertex++);
        vtx->vertex.set1Value (vertex, SbVec3f (x, 0, z));
        coords.set1Value (coord++, vertex++);
        coords.set1Value (coord++, SO_END_LINE_INDEX);

        text = new SoText2;
        text->justification = SoText2::CENTER;
        char textLabel [10];
        sprintf (textLabel, "%.0f", x);
        text->string = textLabel;
        xLabels->addChild (text);
        xLabels->addChild (xTranslation);
    }

    // now x
    x = -zMax;
    z = ceil (-xMax);
    if (z == -xMax)
        z += 1; // remove those end regions

    SoTranslation       *yStart = new SoTranslation;
    SoTranslation       *yTranslation = new SoTranslation;

    yStart->translation = SbVec3f (-x, 0, z);
    yTranslation->translation = SbVec3f (0, 0, 1);
    zLabels->addChild (yStart);

    ticks = int (2 * abs (int (z)) + 1);
    for (tick = 0; tick < ticks; tick++, z++)
    {
        vtx->vertex.set1Value (vertex, SbVec3f (-x, 0, z));
        coords.set1Value (coord++, vertex++);
        vtx->vertex.set1Value (vertex, SbVec3f (x, 0, z));
        coords.set1Value (coord++, vertex++);
        coords.set1Value (coord++, SO_END_LINE_INDEX);

        text = new SoText2;
        text->justification = SoText2::CENTER;
        char textLabel [10];
        sprintf (textLabel, "%.0f", z);
        text->string = textLabel;
        zLabels->addChild (text);
        zLabels->addChild (yTranslation);
    }

    grid->vertexProperty = vtx;
    grid->coordIndex = coords;
        
    // set parts
    setPart ("xLabels",         xLabels);
    setPart ("zLabels",         zLabels);
    setPart ("grid",            grid);
    setPart ("font",            font);
}

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