source: trunk/vizservers/nanovis/Grid.cpp @ 828

#include <GL/glew.h>
#include <GL/gl.h>
#include "Grid.h"

Grid::Grid()
: _axisColor(1.0f, 1.0f, 1.0f), _font(0), _axisGridLineCount(5.0f, 5.0f, 5.0f),
_axisMin(0.0f, 0.0f, 0.0f), _axisMax(1.0f, 1.0f, 1.0f), _gridLineColor(1.0f, 1.0f, 1.0f), _visible(false)
{
        __axisScale = _axisMax - _axisMin;
    _axisName[0] = "X";
    _axisName[1] = "Y";
    _axisName[2] = "Z";
}

void Grid::render()
{
        glPushMatrix();
        glEnable(GL_DEPTH_TEST);

        //glTranslatef(0.5f, 0.5f, 0.5f);
        glScalef(1.0f, __axisScale.y / __axisScale.x, __axisScale.z / __axisScale.x);
        glTranslatef(-0.5f, -0.5f, -0.5f);
        glLineWidth(2.0f);
    glColor3f(_axisColor.x, _axisColor.y, _axisColor.z);

        glBegin(GL_LINES);
                glVertex3f(0.0f,0.0f,0.0f);
                glVertex3f(1.2f,0.0f,0.0f);
                glVertex3f(0.0f,0.0f,0.0f);
                glVertex3f(0.0f,1.2f,0.0f);
                glVertex3f(0.0f, 0.0f, 0.0f);
                glVertex3f(0.0f, 0.0f, 1.2f);
        glEnd();

    glDisable(GL_TEXTURE_2D);
        glLineWidth(1.0f);
        glEnable(GL_BLEND);
    glColor3f(_gridLineColor.x, _gridLineColor.y, _gridLineColor.z);
        glBegin(GL_LINES);

        float linecount = 2.0f;
        float linecountY = 4.0f;
                // +y
                for (int i = 1; i <= (int) _axisGridLineCount.y; ++i)
                {
                        glVertex3f(0.0f, i / _axisGridLineCount.y, 0.0f);
                        glVertex3f(1.1f, i / _axisGridLineCount.y, 0.0f);
                }
                
                for (int i = 1; i <= (int) _axisGridLineCount.x; ++i)
                {
                        glVertex3f(i / _axisGridLineCount.x, 0.0f, 0.0f);
                        glVertex3f(i / _axisGridLineCount.x, 1.0f, 0.0f);
                }

                for (int i = 1; i <= (int) _axisGridLineCount.z; ++i)
                {
                        glVertex3f(0.0f, 0.0f, i / _axisGridLineCount.z);
                        glVertex3f(0.0f, 1.0f, i / _axisGridLineCount.z);
                }

                for (int i = 1; i <= (int) _axisGridLineCount.y; ++i)
                {
                        glVertex3f(0.0f, i / _axisGridLineCount.y, 0.0f);
                        glVertex3f(0.0f, i / _axisGridLineCount.y, 1.0f);
                }

                for (int i = 1; i <= (int) _axisGridLineCount.x; ++i)
                {
                        glVertex3f(i / _axisGridLineCount.x,0.0f, 0.0f);
                        glVertex3f(i / _axisGridLineCount.x,0.0f, 1.1f);
                }

                for (int i = 1; i <= (int) _axisGridLineCount.z; ++i)
                {
                        glVertex3f(0.0f, 0.0f, i / _axisGridLineCount.z);
                        glVertex3f(1.1f, 0.0f, i / _axisGridLineCount.z);
                }
        glEnd();

        if (_font)
        {
                double x = 1.0f, y = 0.0f, z = 0.0f;
                double mv[16], prjm[16];
                int viewport[4];
                double winx, winy, winz;
                glGetDoublev(GL_MODELVIEW_MATRIX, mv);
                glGetDoublev(GL_PROJECTION_MATRIX, prjm);
                glGetIntegerv(GL_VIEWPORT, viewport);

                
                _font->begin();
                if (gluProject(1.2, 0.0, 0.0, mv, prjm, viewport, &winx, &winy, &winz))
                {
                        glLoadIdentity();
                        glTranslatef((int) winx, viewport[3] - (int) winy, 0);
                        _font->draw((const char*) _axisName[0]);
                }
                                
                if (gluProject(0.0, 1.2, 0.0, mv, prjm, viewport, &winx, &winy, &winz))
                {
                        glLoadIdentity();
                        glTranslatef((int) winx, viewport[3] - (int)winy, 0);
                        _font->draw((const char*) _axisName[1]);
                }

                if (gluProject(0.0, 0.0, 1.2, mv, prjm, viewport, &winx, &winy, &winz))
                {
                        glLoadIdentity();
                        glTranslatef((int) winx, (int) viewport[3] - (int)winy, 0.0f);
                        _font->draw((const char*) _axisName[2]);
                }

                glColor4f(1.0f, 1.0f, 0.0f, 0.5f);
                char buff[20];
                // Y
                for (int i = 1; i <= (int) _axisGridLineCount.y; ++i)
                {
                        if (gluProject(1.2, i / _axisGridLineCount.y, 0.0f, mv, prjm, viewport, &winx, &winy, &winz))
                        {
                                glLoadIdentity();
                                glTranslatef((int) winx, (int) viewport[3] - (int)winy, 0.0f);
                                sprintf(buff, "%0.2f", __axisScale.y / _axisGridLineCount.y * i);
                                _font->draw(buff);
                        }
                }

                for (int i = 1; i <= (int) _axisGridLineCount.z; ++i)
                {
                        if (gluProject(1.2, 0.0, i / _axisGridLineCount.z , mv, prjm, viewport, &winx, &winy, &winz))
                        {
                                glLoadIdentity();
                                glTranslatef((int) winx, (int) viewport[3] - (int)winy, 0.0f);
                                sprintf(buff, "%0.2f", __axisScale.z / _axisGridLineCount.z * i);
                                _font->draw(buff);
                        }
                }

                for (int i = 1; i <= (int) _axisGridLineCount.x; ++i)
                {
                        if (gluProject( i / _axisGridLineCount.x, 0.0f, 1.2, mv, prjm, viewport, &winx, &winy, &winz))
                        {
                                glLoadIdentity();
                                glTranslatef((int) winx, (int) viewport[3] - (int)winy, 0.0f);
                                sprintf(buff, "%0.2f", __axisScale.x / _axisGridLineCount.x * i);
                                _font->draw(buff);
                        }
                }

                _font->end();
        };

        glPopMatrix();
        glDisable(GL_DEPTH_TEST);
        glDisable(GL_BLEND);
}
 
void Grid::setFont(R2Fonts* font)
{
//      if (font == _font) return;
//      if (font) font->addRef();
//      if (_font) _font->unrefDelete();
        
        _font = font;
}