7f1dad1083
git-svn-id: https://micropolis.googlecode.com/svn/trunk/micropolis-java@902 d9718cc8-9f43-0410-858b-315f434eb58c
96 lines
2.5 KiB
Java
96 lines
2.5 KiB
Java
// This file is part of MicropolisJ.
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// Copyright (C) 2013 Jason Long
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// Portions Copyright (C) 1989-2007 Electronic Arts Inc.
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//
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// MicropolisJ is free software; you can redistribute it and/or modify
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// it under the terms of the GNU GPLv3, with additional terms.
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// See the README file, included in this distribution, for details.
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package micropolisj.engine;
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import static micropolisj.engine.TileConstants.*;
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public class TrainSprite extends Sprite
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{
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static int [] Cx = { 0, 16, 0, -16 };
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static int [] Cy = { -16, 0, 16, 0 };
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static int [] Dx = { 0, 4, 0, -4, 0 };
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static int [] Dy = { -4, 0, 4, 0, 0 };
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static int [] TrainPic2 = { 1, 2, 1, 2, 5 };
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static final int TRA_GROOVE_X = 8;
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static final int TRA_GROOVE_Y = 8;
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static final int FRAME_NORTHSOUTH = 1;
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static final int FRAME_EASTWEST = 2;
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static final int FRAME_NW_SE = 3;
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static final int FRAME_SW_NE = 4;
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static final int FRAME_UNDERWATER = 5;
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static final int DIR_NORTH = 0;
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static final int DIR_EAST = 1;
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static final int DIR_SOUTH = 2;
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static final int DIR_WEST = 3;
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static final int DIR_NONE = 4; //not moving
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public TrainSprite(Micropolis engine, int xpos, int ypos)
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{
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super(engine, SpriteKind.TRA);
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this.x = xpos * 16 + TRA_GROOVE_X;
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this.y = ypos * 16 + TRA_GROOVE_Y;
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this.offx = -16;
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this.offy = -16;
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this.dir = DIR_NONE; //not moving
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}
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@Override
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public void moveImpl()
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{
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if (frame == 3 || frame == 4) {
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frame = TrainPic2[this.dir];
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}
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x += Dx[this.dir];
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y += Dy[this.dir];
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if (city.acycle % 4 == 0) {
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// should be at the center of a cell, if not, correct it
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x = (x/16) * 16 + TRA_GROOVE_X;
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y = (y/16) * 16 + TRA_GROOVE_Y;
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int d1 = city.PRNG.nextInt(4);
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for (int z = d1; z < d1 + 4; z++) {
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int d2 = z % 4;
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if (this.dir != DIR_NONE) { //impossible?
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if (d2 == (this.dir + 2) % 4)
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continue;
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}
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int c = getChar(this.x + Cx[d2], this.y + Cy[d2]);
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if (((c >= RAILBASE) && (c <= LASTRAIL)) || //track?
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(c == RAILVPOWERH) ||
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(c == RAILHPOWERV))
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{
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if ((this.dir != d2) && (this.dir != DIR_NONE)) {
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if (this.dir + d2 == 3)
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this.frame = FRAME_NW_SE;
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else
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this.frame = FRAME_SW_NE;
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}
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else {
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this.frame = TrainPic2[d2];
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}
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if ((c == RAILBASE) || (c == (RAILBASE+1))) {
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//underwater
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this.frame = FRAME_UNDERWATER;
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}
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this.dir = d2;
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return;
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}
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}
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if (this.dir == DIR_NONE) {
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// train has nowhere to go, so retire
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this.frame = 0;
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return;
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}
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this.dir = DIR_NONE;
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}
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}
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}
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