SVN / public / code / vorlesung-11 / TerminalManager.cpp

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// Copyright 2026, University of Freiburg,
// Chair of Algorithms and Data Structures.
// Author: Johannes Kalmbach <kalmbach@cs.uni-freiburg.de>.
// Author: Christoph Ullinger <ullingec@cs.uni-freiburg.de>.

#include "./TerminalManager.h"
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <ncurses.h>

// ____________________________________________________________________________
bool UserInput::isEscape() { return keycode_ == 27; }
bool UserInput::isKeyLeft() { return keycode_ == KEY_LEFT; }
bool UserInput::isKeyRight() { return keycode_ == KEY_RIGHT; }
bool UserInput::isKeyUp() { return keycode_ == KEY_UP; }
bool UserInput::isKeyDown() { return keycode_ == KEY_DOWN; }
bool UserInput::isMouseclick() { return mouseRow_ != -1; }

// ____________________________________________________________________________
void TerminalManager::drawLine(int row1, int col1, int row2, int col2,
                               int color) {
  int dominantCol = std::abs(col2 - col1);
  int dominantRow = std::abs(row2 - row1);
  int stepCol = (col1 < col2) ? 1 : -1;
  int stepRow = (row1 < row2) ? 1 : -1;
  int error = dominantCol - dominantRow;

  while (true) {
    drawPixel(row1, col1, color);
    if (col1 == col2 && row1 == row2) {
      break;
    }
    int error2 = 2 * error;
    if (error2 > -dominantRow) {
      error -= dominantRow;
      col1 += stepCol;
    }
    if (error2 < dominantCol) {
      error += dominantCol;
      row1 += stepRow;
    }
  }
}