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lilgreenland
245
js/powerups.js
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245
js/powerups.js
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let powerUp = [];
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const powerUps = {
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heal: {
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name: "heal",
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color: "#0f9",
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size() {
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return 40 * Math.sqrt(0.1 + Math.random() * 0.5);
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},
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effect() {
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let heal = this.size / 40;
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mech.addHealth(heal * heal);
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//game.makeTextLog('heal for '+(heal*100).toFixed(0)+'%',80)
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}
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},
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field: {
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name: "field",
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color: "#f9f",
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size() {
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return 40;
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},
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effect() {
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const previousMode = mech.fieldMode
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if (!this.mode) { //this.mode is set if the power up has been ejected from player
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mode = mech.fieldMode
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while (mode === mech.fieldMode) {
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mode = Math.ceil(Math.random() * (mech.fieldUpgrades.length - 1))
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}
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mech.fieldUpgrades[mode](); //choose random field upgrade that you don't already have
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} else {
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mech.fieldUpgrades[this.mode](); //set a predetermined power up
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}
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if (previousMode !== 0) { //pop the old field out in case player wants to swap back
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// mech.fieldMeter = 0 //drop field meter to zero to prevent automatic pickup
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mech.fieldCDcycle = game.cycle + 60; //trigger fieldCD to stop power up grab automatic pick up of spawn
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powerUps.spawn(mech.pos.x, mech.pos.y, "field", false, previousMode);
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}
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// mech.fieldUpgrades[3]();
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//pause game so player can read above the new field
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// game.fpsCap = 0 //40 - Math.min(25, 100 * dmg)
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// game.fpsInterval = 1000 / game.fpsCap;
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// function unpause() {
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// game.fpsCap = 72
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// game.fpsInterval = 1000 / game.fpsCap;
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// document.body.removeEventListener("keydown", unpause);
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// }
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// document.body.addEventListener("keydown", unpause);
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}
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},
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ammo: {
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name: "ammo",
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color: "#467",
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size() {
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return 17;
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},
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effect() {
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//only get ammo for guns player has
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let target;
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if (b.inventory.length > 0) {
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//add ammo to a gun in inventory
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target = b.guns[b.inventory[Math.floor(Math.random() * (b.inventory.length))]];
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} else {
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//if you don't have a gun just add ammo to a random gun
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target = b.guns[Math.floor(Math.random() * b.guns.length)];
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}
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//ammo given scales as mobs take more hits to kill
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const ammo = Math.ceil((target.ammoPack * (0.60 + 0.5 * Math.random())) / b.dmgScale);
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target.ammo += ammo;
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game.updateGunHUD();
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game.makeTextLog("+" + ammo + " ammo: " + target.name, 180);
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}
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},
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gun: {
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name: "gun",
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color: "#0cf",
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size() {
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return 30;
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},
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effect() {
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//find what guns I don't have
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let options = [];
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for (let i = 0; i < b.guns.length; ++i) {
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if (!b.guns[i].have) options.push(i);
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}
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//give player a gun they don't already have if possible
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if (options.length > 0) {
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let newGun = options[Math.floor(Math.random() * options.length)];
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// newGun = 4; //makes every gun you pick up this type //enable for testing one gun
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if (b.activeGun === null) {
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b.activeGun = newGun //if no active gun switch to new gun
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game.makeTextLog(
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"<br><br><br><br><div class='wrapper'> <div class = 'grid-box'><strong>left mouse</strong>: fire weapon</div> <div class = 'grid-box'> <span class = 'mouse'>️<span class='mouse-line'></span></span> </div></div>",
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Infinity
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);
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} else {
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game.makeTextLog(
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// "<div style='font-size:120%;' >new gun: " + b.guns[newGun].name + "</div><span class = 'box'>E</span> / <span class = 'box'>Q</span>",
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"<div style='font-size:120%;' >new gun: " + b.guns[newGun].name + "</div>",
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360
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);
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}
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b.guns[newGun].have = true;
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b.inventory.push(newGun);
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b.guns[newGun].ammo += b.guns[newGun].ammoPack * 2;
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game.makeGunHUD();
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} else {
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//if you have all guns then get ammo
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const ammoTarget = Math.floor(Math.random() * (b.guns.length));
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const ammo = Math.ceil(b.guns[ammoTarget].ammoPack * 2);
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b.guns[ammoTarget].ammo += ammo;
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game.updateGunHUD();
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game.makeTextLog("+" + ammo + " ammo: " + b.guns[ammoTarget].name, 180);
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}
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}
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},
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spawnRandomPowerUp(x, y) { //mostly used after mob dies
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if (Math.random() * Math.random() - 0.25 > Math.sqrt(mech.health) || Math.random() < 0.04) { //spawn heal chance is higher at low health
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powerUps.spawn(x, y, "heal");
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return;
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}
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if (Math.random() < 0.18) {
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if (b.inventory.length > 0) powerUps.spawn(x, y, "ammo");
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return;
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}
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if (Math.random() < 0.005 * (8 - b.inventory.length)) { //a new gun has a low chance for each not acquired gun to drop
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powerUps.spawn(x, y, "gun");
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return;
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}
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if (Math.random() < 0.006) {
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powerUps.spawn(x, y, "field");
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return;
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}
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},
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chooseRandomPowerUp(x, y) { //100% chance to drop a random power up //used in spawn.debris
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if (Math.random() < 0.5) {
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powerUps.spawn(x, y, "heal", false);
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} else {
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powerUps.spawn(x, y, "ammo", false);
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}
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},
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spawnStartingPowerUps(x, y) {
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if (b.inventory.length < 3) {
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powerUps.spawn(x, y, "gun", false); //starting gun
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} else {
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powerUps.spawnRandomPowerUp(x, y);
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powerUps.spawnRandomPowerUp(x, y);
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powerUps.spawnRandomPowerUp(x, y);
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powerUps.spawnRandomPowerUp(x, y);
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}
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},
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spawn(x, y, target, moving = true, mode) {
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let i = powerUp.length;
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target = powerUps[target];
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size = target.size();
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powerUp[i] = Matter.Bodies.polygon(x, y, 0, size, {
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density: 0.001,
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frictionAir: 0.01,
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restitution: 0.8,
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collisionFilter: {
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group: 0,
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category: 0x100000,
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mask: 0x100001
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},
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endCycle: game.cycle + 1080, //if change time also update color fade out
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color: target.color,
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sat: 1,
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effect: target.effect,
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mode: mode,
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name: target.name,
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size: size
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});
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if (moving) {
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Matter.Body.setVelocity(powerUp[i], {
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x: (Math.random() - 0.5) * 15,
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y: Math.random() * -9 - 3
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});
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}
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World.add(engine.world, powerUp[i]); //add to world
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},
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spawnHeal(x, y, size) { //used by the mass recycler power up
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let i = powerUp.length;
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const target = powerUps["heal"];
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powerUp[i] = Matter.Bodies.polygon(x, y, 0, size, {
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density: 0.001,
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frictionAir: 0.01,
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restitution: 0.8,
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collisionFilter: {
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group: 0,
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category: 0x100000,
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mask: 0x100001
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},
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endCycle: game.cycle + 1080, //if change time also update color fade out
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color: target.color,
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sat: 1,
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effect: target.effect,
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name: target.name,
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size: size
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});
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// Matter.Body.setVelocity(powerUp[i], {
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// x: (Math.random() - 0.5) * 3,
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// y: -7 * Math.random() - 5
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// });
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World.add(engine.world, powerUp[i]); //add to world
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},
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attractionLoop() {
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for (let i = 0, len = powerUp.length; i < len; ++i) {
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const dxP = player.position.x - powerUp[i].position.x;
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const dyP = player.position.y - powerUp[i].position.y;
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const dist2 = dxP * dxP + dyP * dyP;
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//gravitation for pickup
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if (dist2 < 100000 && (powerUp[i].name != "heal" || mech.health < 1)) {
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if (dist2 < 2000) {
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//knock back from grabbing power up
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Matter.Body.setVelocity(player, {
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x: player.velocity.x + ((powerUp[i].velocity.x * powerUp[i].mass) / player.mass) * 0.25,
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y: player.velocity.y + ((powerUp[i].velocity.y * powerUp[i].mass) / player.mass) * 0.25
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});
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mech.usePowerUp(i);
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break;
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}
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//power up needs to be able to see player to gravitate
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if (Matter.Query.ray(map, powerUp[i].position, player.position).length === 0) { // && Matter.Query.ray(body, powerUp[i].position, player.position).length === 0
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//extra friction
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Matter.Body.setVelocity(powerUp[i], {
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x: powerUp[i].velocity.x * 0.97,
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y: powerUp[i].velocity.y * 0.97
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});
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//float towards player
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powerUp[i].force.x += (dxP / dist2) * powerUp[i].mass * 1.6;
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powerUp[i].force.y += (dyP / dist2) * powerUp[i].mass * 1.6 - powerUp[i].mass * game.g; //negate gravity
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//draw the pulling effect
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ctx.globalAlpha = 0.2;
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mech.drawHold(powerUp[i], false);
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ctx.globalAlpha = 1;
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}
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}
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}
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}
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};
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