回答編集履歴
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y座標ランダム+ループ
test
CHANGED
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@@ -57,3 +57,305 @@
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57
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```
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if文が途切れていて詳しくはわかりませんが、変数 y が使われていないようです
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追記：
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```Java
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Bullet bullet;
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private Boss boss = new Boss(75, 35);
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private ArrayList<Bullet> danmaku = new ArrayList<Bullet>();
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float[] z = new float[500];
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float[] y = new float[500]; //左から流れる玉のy座標
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void setup() {
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size(420, 580);
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frameRate(40);
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noCursor();
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bullet = new Bullet(width/2, height/2, 10, 0, 0 );
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for (int r = 0; r < z.length; r++) {
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z[r] = random(-1000,300);
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y[r] = random(height); //乱数(0~height)で初期化
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}
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}
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void ship(int x, int y) {
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noStroke();
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fill(255, 0, 0);
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ellipse(mouseX, mouseY, 7.5, 7.5);
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}
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class Boss {
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private int tx, ty;
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private int dx, dy;
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private long routine = 0;
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Boss(int x, int y) {
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tx = x;
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ty = y;
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dx = 1;
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dy = -5;
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}
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void move() {
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tx += dx;
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ty += dy;
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if (tx < 0 || tx > width) {
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dx*= -1;
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}
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if (ty < 0 || ty > height) {
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dy*= -1;
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}
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}
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void doShinking() {
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routine++;
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if (routine % 10 == 0) {
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move();
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}
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if (routine % 30 == 0) {
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danmaku.addAll(this.shot());
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println("#shot" +routine + ":" + tx + "," + ty);
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}
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}
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ArrayList<Bullet> shot() {
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ArrayList<Bullet> danmaku = new ArrayList();
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for (int i = 0; i < 360; i+= 11.5) {
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double rad = radians(i);
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danmaku.add(new Bullet(this.tx, this.ty, 10, Math.cos(rad), Math.sin(rad)));
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}
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return danmaku;
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}
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}
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class Bullet {
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private double tx, ty;
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private final double tr;
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private double dx, dy;
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private boolean is_alive = true;
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Bullet(double x, double y, double r, double temp_dx, double temp_dy ) {
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tx = x;
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ty = y;
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tr = r;
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dx = temp_dx;
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dy = temp_dy;
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}
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boolean isAlive() {
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return is_alive;
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}
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void update() {
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tx += dx;
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ty += dy;
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if (Math.min(tx, ty) < 0) {
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is_alive = false;
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return ;
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}
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if (tx > width || ty > height) {
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is_alive = false;
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return ;
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}
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stroke(255, 0, 255);
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fill(0, 0, 255);
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ellipse((float)tx, (float)ty, (float)tr, (float)tr);
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}
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}
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void draw() {
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background(0);
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/*不要?なのでコメントアウト
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for (int r = 0; r < z.length; r++) {
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z[r] += 2;
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//float y = r * 0.5;
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ellipse(z[r], y[r], 10, 10);
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}
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*/
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ship(mouseX, mouseY);
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boss.doShinking();
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for (int i = danmaku.size() -1; i >= 0; i--) {
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Bullet b = (Bullet)danmaku.get(i);
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if (!b.isAlive()) {
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danmaku.remove(i);
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continue;
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}
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b.update();
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}
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for (int r = 0; r < z.length; r++) {
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z[r] += 2;
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if(z[r] > width + 10){ //玉が画面外に出たら
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z[r] = random(-1000,-10); //画面左外に戻す
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y[r] = random(height);
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}
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stroke(255, 0, 255); //輪郭線の色
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fill(0,0,255); //玉の色
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ellipse(z[r], y[r], 10, 10); //y座標に y[r]を使う
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}
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}
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```
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358
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359
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左から流れる玉のy座標をランダムにしたいのであれば玉1つ1つのy座標を覚えておく必要があります。
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360
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ループさせるには x座標( z[r] )が width(画面横幅) + 10(玉の半径) を超えたら画面外に出ているので画面左外に戻す必要があります。
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