28. BWINF, Runde 1, Aufgabe 3: Wegfehler - Matthias Springer .DE

Aufgabe 3
Stefan Hansch, Markus Wirsing, Matthias Springer
vector_direction[1] * vector_direction[1]);
425 vector_direction[0] /= vector_length;
426 vector_direction[1] /= vector_length;
427
428 // Zeichne die Strecke
429 for (int i = 0; i < (int)ceil(vector_length) + 1; i++)
430 {
431 setPixel(x1 + (int)(vector_direction[0] * (double)i), y1 + (int)(
vector_direction[1]* (double)i), r, g, b);
432 }
433 }
434
435 /// *************************************************
436 /// * Setzt einen Pixel auf eine Farbe. *
437 /// *************************************************
438 void setPixel(int x, int y, int r, int g, int b)
439 {
440 // Ueberpruefe, ob der Pixel gueltig ist, d.h. in der Matrix liegt
441
442 if ((x > -1) && (x < proportions[0]) && (y > -1) && (y < proportions[1]))
443 {
444 matrix[x][y][0] = r;
445 matrix[x][y][1] = g;
446 matrix[x][y][2] = b;
447 }
448 }
449
450 /// *************************************************
451 /// * Gibt zu einer x-Koordinate den Pixelwert aus. *
452 /// *************************************************
453 int convertCoordinateToPixelEast(double value)
454 {
455 double coord_difference = value - coord_left;
456 double pixel_per_coordinate_quotient = (double)proportions[0] / (
coord_right - coord_left);
457
458 return (int)(coord_difference * pixel_per_coordinate_quotient);
459 }
460
461 /// *************************************************
462 /// * Gibt zu einer y-Koordinate den Pixelwert aus. *
463 /// *************************************************
464 int convertCoordinateToPixelNorth(double value)
465 {
466 double coord_difference = value - coord_bottom;
467 double pixel_per_coordinate_quotient = (double)proportions[1] / (
coord_top - coord_bottom);
468
469 return proportions[1] - (int)(coord_difference *
pixel_per_coordinate_quotient);
470 }
471
472 /// *************************************************
473 /// * Macht einen Eintrag in der Datenbank frei. *
474 /// *************************************************
475 // edit: nicht benoetigt!
476 void insertDatabaseEntry(int index)
477 {
478 for (int i = db_count_entries; i > index; i--)
479 {
480 db_time[i] = db_time[i - 1];
481 db_pos_x[i] = db_pos_x[i - 1];
482 db_pos_y[i] = db_pos_y[i - 1];
483 }
484
485 db_count_entries++;
486 }
487
488 /// *************************************************
489 /// * Berechnet die durschnittliche Geschwindigkeit.*
490 /// *************************************************
491 void db_calculateAverageDistance()
492 {
493 db_average_distance_per_time = 0.0;
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