draw.cpp

#define _CRT_SECURE_NO_WARNINGS
#include <Windows.h>
#include <stdio.h>
#include <gl/glut.h>
#include "Draw.h"

void Draw::string(GLfloat x, GLfloat y, GLfloat r, GLfloat g, GLfloat b, void* font, char const* const pFmtText, ...)
{
    int newLineDist;

    //Set the distance dynamically for new lines
    switch ((int)font)
    {
    case (int)GLUT_BITMAP_9_BY_15:
        newLineDist = 16;
        break;

    case (int)GLUT_BITMAP_8_BY_13:
        newLineDist = 14;
        break;

    case (int)GLUT_BITMAP_TIMES_ROMAN_10:
        newLineDist = 11;
        break;

    case (int)GLUT_BITMAP_TIMES_ROMAN_24:
        newLineDist = 25;
        break;

    case (int)GLUT_BITMAP_HELVETICA_10:
        newLineDist = 11;
        break;

    case (int)GLUT_BITMAP_HELVETICA_12:
        newLineDist = 13;
        break;

    case (int)GLUT_BITMAP_HELVETICA_18:
        newLineDist = 19;
        break;

    default:
        newLineDist = 19;
        break;
    }

    //Set our attributes
    glColor3f(r, g, b);
    glRasterPos2i(x, y);

    //Allocate memory for a temporary result string. You could probably do much less
    char* const pTemp = new char[5000];

    //Put all of the text into pTemp
    va_list vaList;
    va_start(vaList, pFmtText);
    int const TextLen = sprintf(pTemp, pFmtText, vaList);
    va_end(vaList);

    //Draw the string
    for (unsigned int Counter = 0; Counter < TextLen; ++Counter)
    {
        if (pTemp[Counter] == '\n')
        {
            y += newLineDist;
            glRasterPos2i(x, y);
            continue;
        }

        glutBitmapCharacter(font, pTemp[Counter]);
    }

    //Prevent memory leaks
    delete[] pTemp;
}

void Draw::box(GLfloat x, GLfloat y, GLfloat xLen, GLfloat yLen, GLfloat r, GLfloat g, GLfloat b)
{
    
    /*glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);*/
    //Set our attributes
    glColor3f(r, g, b);

    //Draw our box
    glBegin(GL_QUADS);
    glVertex2f(x, y);
    glVertex2f(x + xLen, y);
    glVertex2f(x + xLen, y + yLen);
    glVertex2f(x, y + yLen);
    glEnd();
}

void Draw::boxLine(GLfloat width, GLfloat x, GLfloat y, GLfloat xLen, GLfloat yLen, GLfloat r, GLfloat g, GLfloat b)
{
    //Grab the current line width to prevent clashes
    GLfloat glTemp[1];
    glGetFloatv(GL_LINE_WIDTH, glTemp);

    //Set our attributes
    glColor3f(r, g, b);
    glLineWidth(width);

    //Draw out box
    glBegin(GL_LINE_LOOP);
    glVertex2f(x, y);
    glVertex2f(x + xLen, y);
    glVertex2f(x + xLen, y + yLen);
    glVertex2f(x, y + yLen);
    glEnd();

    //Restore the line width
    glLineWidth(glTemp[0]);
}

void Draw::line(GLfloat width, GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2, GLfloat r, GLfloat g, GLfloat b)
{
    //Grab the current line width to prevent clashes
    GLfloat glTemp[1];
    glGetFloatv(GL_LINE_WIDTH, glTemp);

    //Set our attributes
    glColor3f(r, g, b);
    glLineWidth(width);

    //Draw our line
    glBegin(GL_LINES);
    glVertex2f(x1, y1);
    glVertex2f(x2, y2);
    glEnd();

    //Restore the line width
    glLineWidth(glTemp[0]);
}

void Draw::dot(GLfloat size, GLfloat x, GLfloat y, GLfloat r, GLfloat g, GLfloat b)
{
    //Grab the current line width to prevent clashes
    GLfloat glTemp[1];
    glGetFloatv(GL_POINT_SIZE, glTemp);

    //Set our attributes
    glColor3f(r, g, b);
    glPointSize(size);

    //Draw our point
    glBegin(GL_POINTS);
    glVertex2f(x, y);
    glEnd();

    //Restore to prevent clashing
    glPointSize(glTemp[0]);
}