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#include "train.h"
#include "level.h"
#include "bitmap.h"
void Train::update(Level& level)
{
auto tile = level.get(x, y);
if (tile == 0)
return;
if (m_progress < 1.f) {
m_progress += m_speed;
return;
}
m_progress = 0.f;
auto n = level.get(x, y - 1);
auto e = level.get(x + 1, y);
auto s = level.get(x, y + 1);
auto w = level.get(x - 1, y);
if (m_dir == North) {
if (n == SouthEast) m_dir = East;
if (n == SouthWest) m_dir = West;
y--;
}
else if (m_dir == East) {
if (e == NorthWest) m_dir = North;
if (e == SouthWest) m_dir = South;
x++;
}
else if (m_dir == South) {
if (s == NorthEast) m_dir = East;
if (s == NorthWest) m_dir = West;
y++;
}
else if (m_dir == West) {
if (w == NorthEast) m_dir = North;
if (w == SouthEast) m_dir = South;
x--;
}
nextTile();
}
void Train::draw(Bitmap& bitmap, int xo, int yo)
{
float xi = ((float)x + (float)(m_nextX - x) * m_progress) * 24;
float yi = ((float)y + (float)(m_nextY - y) * m_progress) * 24;
int xx = (int)((xi - yi) / 2.f - (float)xo);
int yy = (int)((xi + yi) / 4.f - (float)yo);
bitmap.blit(m_sprite, xx, yy, 0, 0, 24, 24);
}
void Train::setPosition(int tx, int ty)
{
x = tx;
y = ty;
m_progress = 0.f;
nextTile();
}
void Train::nextTile()
{
if (m_dir == North) { m_nextX = x; m_nextY = y - 1; }
if (m_dir == East) { m_nextX = x + 1; m_nextY = y; }
if (m_dir == South) { m_nextX = x; m_nextY = y + 1; }
if (m_dir == West) { m_nextX = x - 1; m_nextY = y; }
}
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