77 lines
1.4 KiB
JavaScript
77 lines
1.4 KiB
JavaScript
'use strict';
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const Projectile = require('./projectile.js');
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const Rope = require('../../copula/rope.js');
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class Grapple extends Projectile {
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constructor(world, pos, source) {
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super(world);
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this.x = pos.x * 32;
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this.y = pos.y * 32;
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this.xvel = pos.xvel;
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this.yvel = pos.yvel;
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this.r = pos.r;
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this.xvel += Math.cos(this.r) * 0.4;
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this.yvel += Math.sin(this.r) * 0.4;
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this.welded = false;
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this.source = source;
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this.player = source.player;
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this.type = 'grapple';
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this.frame = [
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[[0, -8], [5, -12], [4, 0], [0, 0]],
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[[0, 0], [4, 0], [5, 12], [0, 8]]
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];
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}
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release() {
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this.source.grapple = false;
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this.world.removeBody(this);
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}
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retract() {
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if (this.rope.length > 0.05)
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this.rope.length = this.rope.length - 0.1;
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}
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connect() {
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let p1 = { x: 0, y: 0.5 };
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let p2 = { x: 4, y: 0 };
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this.rope = new Rope(this.player.ship, this, p1, p2);
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this.world.addCopula(this.rope);
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this.rope.length = 5;
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}
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contact(body, contact) {
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if (this.welded || body == this.source)
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return;
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this.welded = true;
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let normal = this.world.physics.contactData(contact).normal;
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let angle = Math.atan2(normal.y, normal.x);
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this.b2body.SetAngleRadians(angle);
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this.world.weld(this, body);
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}
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tickType() {
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}
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packTypeDelta() {
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return [];
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}
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packFull() {
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return {
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type: 'grapple',
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id: this.id,
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source: this.source.id,
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frame: this.frame,
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delta: this.packDelta()
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};
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}
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}
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module.exports = Grapple;
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