How would I make it so when the player crosses over a certian area it makes an entity come out of that area
Could you please elaborate via an example?
Player -------------------------------> player walks over trigger ------------------------> SCRIPT
Trigger is here Player triggers script
When the player walks over the trigger it will activate another script
Hi @Mason_Rocchio,
Check this tutorial on triggers:
https://developer.playcanvas.com/en/tutorials/collision-and-triggers/
I have already tried that
What does your current setup look like?
when the player walkes over the trigger it turnes on the enemy.js script
Create a trigger entity first. This is an entity with a collision component. Add a script like the script on the tutorial page below. You can add a attribute to this script for your enemy entity. On trigger enter you can enable the enemy script.
https://developer.playcanvas.com/en/user-manual/physics/trigger-volumes/
When the player walks over a trigger I want to activate another script how would I do that?
What I have so far:
triggerVolume script with enemy attribute for the enemy I want to activate. listed below
var TriggerVolume = pc.createScript('triggerVolume');
// initialize code called once per entity
TriggerVolume.prototype.initialize = function() {
this.entity.collision.on('triggerenter', function (entity) {
console.log(entity.name + ' has entered trigger volume.');
});
this.entity.collision.on('triggerleave', function (entity) {
console.log(entity.name + ' has left trigger volume.');
});
};
TriggerVolume.attributes.add('Enemy Entity',{
type: 'entity'
});
enemy script: listed below
var Enemy = pc.createScript('enemy');
Enemy.attributes.add('enemyCamera', {type: 'entity', title: 'Camera Entity'});
Enemy.attributes.add('enemyTarget', {type: 'entity', title: 'Target Entity'});
Enemy.attributes.add('enemyGround', {type: 'entity', title: 'Ground Entity'});
Enemy.attributes.add('enemySpeed', {type: 'number', default: 0.1, title: 'Enemy Speed'});
// initialize code called once per entity
Enemy.prototype.initialize = function() {
this.enemyCanSeeTarget = false;
this.enemyDestination = new pc.Entity();
this.activated = false;
};
// update code called every frame
Enemy.prototype.update = function(dt) {
if (this.activated) {
this.searchTarget();
this.detectObstacle();
this.moveEnemy(dt);
}
else if (console.log(entity.name + ' has left trigger volume.')){
this.activated = true;
}
};
Enemy.prototype.moveEnemy = function (dt) {
var destination = new pc.Vec3(this.enemyDestination.getPosition().x, 1, this.enemyDestination.getPosition().z);
var distanceToDestination = this.entity.getPosition().distance(destination);
// move the enemy based on the current state
if (!this.enemyCanSeeTarget) {
if (distanceToDestination > 0.1) {
this.entity.sound.play("Chase");
this.entity.lookAt(destination);
this.entity.translateLocal(0,0, -this.enemySpeed*dt);
}
else {
this.entity.sound.stop("Chase");
this.randomDestination();
}
}
else {
this.entity.lookAt(this.enemyDestination.getPosition());
if (distanceToDestination > 2) {
this.entity.translateLocal(0,0, -this.enemySpeed*dt*2);
}
}
};
Enemy.prototype.detectObstacle = function () {
this.app.systems.rigidbody.raycastFirst(this.entity.getPosition(), this.enemyDestination.getPosition(), function (result) {
// check if there is an obstacle in the way
// prevent the enemy is moving inside an obstacle
if (result.entity.name == 'Obstacle') {
var distanceToObstacle = this.entity.getPosition().distance(result.point);
if (distanceToObstacle < 2) {
this.randomDestination();
}
}
}.bind(this));
};
Enemy.prototype.searchTarget = function () {
var target = this.enemyTarget.getPosition();
var distanceToTarget = this.entity.getPosition().distance(target);
// check if target is in range, so close enough to see
if (distanceToTarget < 10) {
target.sub(this.entity.getPosition()).normalize();
var dot = target.dot(this.entity.forward);
// check if target is front, so spottable or already spotted
if (dot > 0.5 || this.enemyCanSeeTarget) {
this.app.systems.rigidbody.raycastFirst(this.entity.getPosition(), this.enemyTarget.getPosition(), function (result) {
// check if target is in view, so no obstacles in the way
if (result.entity.name == 'Player') {
this.enemyCanSeeTarget = true;
this.enemyDestination.setPosition(this.enemyTarget.getPosition().x, 1, this.enemyTarget.getPosition().z);
}
else {
this.enemyCanSeeTarget = false;
}
}.bind(this));
}
else {
this.enemyCanSeeTarget = false;
}
}
else {
this.enemyCanSeeTarget = false;
}
};
Enemy.prototype.randomDestination = function () {
var xPosition = pc.math.random(-this.enemyGround.getLocalScale().x/2, this.enemyGround.getLocalScale().x/2);
var zPosition = pc.math.random(-this.enemyGround.getLocalScale().z/2, this.enemyGround.getLocalScale().z/2);
this.enemyDestination.setPosition(xPosition, 1, zPosition);
};
Below how you can activate and deactive the enemy using your trigger.
// initialize code called once per entity
TriggerVolume.prototype.initialize = function() {
this.entity.collision.on('triggerenter', function (entity) {
this.enemyEntity.script.enemy.activated = true;
}.bind(this));
this.entity.collision.on('triggerleave', function (entity) {
this.enemyEntity.script.enemy.activated = false;
}.bind(this));
};
You need to rename your attribute to enemyEntity (instead of Enemy Entity). You also have to remove the else if statement from the code below.