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import { getCosmos } from './cosmos.js';
import { globalView } from './view.js';
import Vec2 from './vec2.js';
import Color from './color.js';
import Pulse from './pulse.js';
var cosmos;
export default class Star {
pos = Vec2.zero();
radius;
difficulty_mult = 0.2;
growth_base = 3;
pulses = [];
state = 'state_glowing';
energy = 5;
growth_rate;
constructor(radius, difficulty) {
cosmos = getCosmos();
this.radius = radius;
const diff_adjust = 1.0 + difficulty * this.difficulty_mult;
this.growth_rate = this.growth_base + diff_adjust;
}
update(dt) {
this.energy += dt * this. growth_rate;
if (this[this.state]) {
this[this.state](dt);
}
}
state_glowing(dt) {
if (this.energy > cosmos.thresh_crit) {
this.state = 'state_critical';
}
}
// Multiply the energy by a random value
// If the result is over the threshold, dump that energy into a pulse
state_critical(dt) {
var rand = 0.1 + 0.8 * Math.random();
var strength = Math.min(rand * this.energy, cosmos.pulse_max_str);
if (strength > cosmos.pulse_min_str) {
this.energy -= strength;
cosmos.pulses.push(Pulse.StrengthPulse(this.radius, strength));
}
}
getColor() {
var color = Color.StarColor;
switch (this.state) {
case 'state_glowing':
color = Color.interpolate(Color.StarDim,
Color.StarBright,
this.energy / cosmos.thresh_crit);
break;
case 'state_critical':
color = Color.StarBright;
break;
}
return color.to_string();
}
render(ctx) {
const view = globalView();
var s_pos = view.project(this.pos);
var surface_vec = view.project(new Vec2(this.radius, this.pos.y));
var s_rad = surface_vec.x - s_pos.x;
ctx.fillStyle = this.getColor();
ctx.beginPath();
ctx.arc(s_pos.x, s_pos.y, s_rad, 0, 2 * Math.PI);
ctx.fill();
}
}
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