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Copy pathvehicle.js
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363 lines (320 loc) · 10.8 KB
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var Vehicle = pc.createScript('vehicle');
Vehicle.attributes.add('wheels', {
type: 'entity',
array: true,
title: 'Wheels'
});
Vehicle.attributes.add('maxEngineForce', {
type: 'number',
default: 2000,
title: 'Max Engine Force'
});
Vehicle.attributes.add('maxBrakingForce', {
type: 'number',
default: 100,
title: 'Max Braking Force'
});
Vehicle.attributes.add('maxSteering', {
type: 'number',
default: 0.3,
title: 'Max Steering'
});
Object.defineProperty(Vehicle.prototype, 'speed', {
get: function () {
return this.vehicle ? this.vehicle.getCurrentSpeedKmHour() : 0;
}
});
// initialize code called once per entity
Vehicle.prototype.initialize = function () {
var body = this.entity.rigidbody.body;
var dynamicsWorld = this.app.systems.rigidbody.dynamicsWorld;
// Create vehicle
var tuning = new Ammo.btVehicleTuning();
var vehicleRayCaster = new Ammo.btDefaultVehicleRaycaster(dynamicsWorld);
var vehicle = new Ammo.btRaycastVehicle(tuning, body, vehicleRayCaster);
vehicle.setCoordinateSystem(0, 1, 2);
// Never deactivate the vehicle
var DISABLE_DEACTIVATION = 4;
body.setActivationState(DISABLE_DEACTIVATION);
// Add wheels to the vehicle
var wheelAxle = new Ammo.btVector3(-1, 0, 0);
var wheelDirection = new Ammo.btVector3(0, -1, 0);
var connectionPoint = new Ammo.btVector3(0, 0, 0);
this.wheels.forEach(function (wheelEntity) {
var wheelScript = wheelEntity.script.vehicleWheel;
var frictionSlip = wheelScript.frictionSlip;
var isFront = wheelScript.isFront;
var radius = wheelScript.radius;
var rollInfluence = wheelScript.rollInfluence;
var suspensionCompression = wheelScript.suspensionCompression;
var suspensionDamping = wheelScript.suspensionDamping;
var suspensionRestLength = wheelScript.suspensionRestLength;
var suspensionStiffness = wheelScript.suspensionStiffness;
var wheelPos = wheelEntity.getLocalPosition();
connectionPoint.setValue(wheelPos.x, wheelPos.y, wheelPos.z);
var wheelInfo = vehicle.addWheel(connectionPoint, wheelDirection, wheelAxle, suspensionRestLength, radius, tuning, isFront);
wheelInfo.set_m_suspensionStiffness(suspensionStiffness);
wheelInfo.set_m_wheelsDampingRelaxation(suspensionDamping);
wheelInfo.set_m_wheelsDampingCompression(suspensionCompression);
wheelInfo.set_m_frictionSlip(frictionSlip);
wheelInfo.set_m_rollInfluence(rollInfluence);
}, this);
Ammo.destroy(wheelAxle);
Ammo.destroy(wheelDirection);
Ammo.destroy(connectionPoint);
// Add the vehicle to the dynamics world
dynamicsWorld.addAction(vehicle);
this.vehicle = vehicle;
this.engineForce = 0;
this.brakingForce = 0;
this.steering = 0;
// Event handling
this.on("enable", function () {
dynamicsWorld.addAction(vehicle);
});
this.on("disable", function () {
dynamicsWorld.removeAction(vehicle);
});
this.on("destroy", function () {
dynamicsWorld.removeAction(vehicle);
Ammo.destroy(vehicleRayCaster);
Ammo.destroy(vehicle);
});
this.on('vehicle:controls', function (steering, throttle) {
this.steering = pc.math.lerp(this.steering, steering * this.maxSteering, 0.3);
if (throttle > 0) {
this.brakingForce = 0;
this.engineForce = this.maxEngineForce;
} else if (throttle < 0) {
this.brakingForce = 0;
this.engineForce = -this.maxEngineForce;
} else {
this.brakingForce = this.maxBrakingForce;
this.engineForce = 0;
}
});
};
// update code called every frame
Vehicle.prototype.update = function (dt) {
var vehicle = this.vehicle;
var i;
var body = this.entity.rigidbody.body;
var DISABLE_DEACTIVATION = 4;
body.setActivationState(DISABLE_DEACTIVATION);
// Apply steering to the front wheels
vehicle.setSteeringValue(this.steering, 0);
vehicle.setSteeringValue(this.steering, 1);
// Apply engine and braking force to the back wheels
vehicle.applyEngineForce(this.engineForce, 2);
vehicle.setBrake(this.brakingForce, 2);
vehicle.applyEngineForce(this.engineForce, 3);
vehicle.setBrake(this.brakingForce, 3);
var numWheels = vehicle.getNumWheels();
for (i = 0; i < numWheels; i++) {
// synchronize the wheels with the (interpolated) chassis worldtransform
vehicle.updateWheelTransform(i, true);
var t = this.vehicle.getWheelTransformWS(i);
var p = t.getOrigin();
var q = t.getRotation();
var wheel = this.wheels[i];
wheel.setPosition(p.x(), p.y(), p.z());
wheel.setRotation(q.x(), q.y(), q.z(), q.w());
}
};
var VehicleWheel = pc.createScript('vehicleWheel');
VehicleWheel.attributes.add('isFront', {
type: 'boolean',
default: true,
title: 'Front Wheel'
});
VehicleWheel.attributes.add('radius', {
type: 'number',
default: 0.4,
title: 'Radius'
});
VehicleWheel.attributes.add('width', {
type: 'number',
default: 0.4,
title: 'Width'
});
VehicleWheel.attributes.add('suspensionStiffness', {
type: 'number',
default: 10,
title: 'Suspension Stiffness'
});
VehicleWheel.attributes.add('suspensionDamping', {
type: 'number',
default: 2.3,
title: 'Suspension Damping'
});
VehicleWheel.attributes.add('suspensionCompression', {
type: 'number',
default: 4.4,
title: 'Suspension Compression'
});
VehicleWheel.attributes.add('suspensionRestLength', {
type: 'number',
default: 0.4,
title: 'Suspension Rest Length'
});
VehicleWheel.attributes.add('rollInfluence', {
type: 'number',
default: 0.2,
title: 'Roll Influence'
});
VehicleWheel.attributes.add('frictionSlip', {
type: 'number',
default: 1000,
title: 'Friction Slip'
});
VehicleWheel.attributes.add('debugRender', {
type: 'boolean',
default: false,
title: 'Debug Render'
});
VehicleWheel.prototype.initialize = function () {
var createDebugWheel = function (radius, width) {
var debugWheel = new pc.Entity();
debugWheel.addComponent('model', {
type: 'cylinder',
castShadows: true
});
debugWheel.setLocalEulerAngles(0, 0, 90);
debugWheel.setLocalScale(radius * 2, width, radius * 2);
return debugWheel;
};
if (this.debugRender) {
this.debugWheel = createDebugWheel(this.radius, this.width);
this.entity.addChild(this.debugWheel);
}
this.on('attr:debugRender', function (value, prev) {
if (value) {
this.debugWheel = createDebugWheel(this.radius, this.width);
this.entity.addChild(this.debugWheel);
} else {
if (this.debugWheel) {
this.debugWheel.destroy();
this.debugWheel = null;
}
}
});
};
var VehicleControls = pc.createScript('vehicleControls');
VehicleControls.attributes.add('targetVehicle', {
type: 'entity',
title: 'Target Vehicle'
});
VehicleControls.attributes.add('leftButton', {
type: 'entity',
title: 'Left Button'
});
VehicleControls.attributes.add('rightButton', {
type: 'entity',
title: 'Right Button'
});
VehicleControls.attributes.add('forwardButton', {
type: 'entity',
title: 'Forward Button'
});
VehicleControls.attributes.add('reverseButton', {
type: 'entity',
title: 'Reverse Button'
});
VehicleControls.prototype.initialize = function () {
this.leftButtonPressed = false;
this.rightButtonPressed = false;
this.upButtonPressed = false;
this.downButtonPressed = false;
this.leftKeyPressed = false;
this.rightKeyPressed = false;
this.upKeyPressed = false;
this.downKeyPressed = false;
if (this.leftButton) {
this.leftButton.enabled = pc.platform.mobile;
this.leftButton.button.on('pressedstart', function () {
this.leftButtonPressed = true;
}, this);
this.leftButton.button.on('pressedend', function () {
this.leftButtonPressed = false;
}, this);
}
if (this.rightButton) {
this.rightButton.enabled = pc.platform.mobile;
this.rightButton.button.on('pressedstart', function () {
this.rightButtonPressed = true;
}, this);
this.rightButton.button.on('pressedend', function () {
this.rightButtonPressed = false;
}, this);
}
if (this.forwardButton) {
this.forwardButton.enabled = pc.platform.mobile;
this.forwardButton.button.on('pressedstart', function () {
this.upButtonPressed = true;
}, this);
this.forwardButton.button.on('pressedend', function () {
this.upButtonPressed = false;
}, this);
}
if (this.reverseButton) {
this.reverseButton.enabled = pc.platform.mobile;
this.reverseButton.button.on('pressedstart', function () {
this.downButtonPressed = true;
}, this);
this.reverseButton.button.on('pressedend', function () {
this.downButtonPressed = false;
}, this);
}
this.app.keyboard.on('keydown', function (e) {
switch (e.key) {
case pc.KEY_A:
case pc.KEY_LEFT:
this.leftKeyPressed = true;
break;
case pc.KEY_D:
case pc.KEY_RIGHT:
this.rightKeyPressed = true;
break;
case pc.KEY_W:
case pc.KEY_UP:
this.upKeyPressed = true;
break;
case pc.KEY_S:
case pc.KEY_DOWN:
this.downKeyPressed = true;
break;
}
}, this);
this.app.keyboard.on('keyup', function (e) {
switch (e.key) {
case pc.KEY_A:
case pc.KEY_LEFT:
this.leftKeyPressed = false;
break;
case pc.KEY_D:
case pc.KEY_RIGHT:
this.rightKeyPressed = false;
break;
case pc.KEY_W:
case pc.KEY_UP:
this.upKeyPressed = false;
break;
case pc.KEY_S:
case pc.KEY_DOWN:
this.downKeyPressed = false;
break;
}
}, this);
};
VehicleControls.prototype.update = function (dt) {
var targetVehicle = this.targetVehicle ? this.targetVehicle : this.entity;
if (targetVehicle) {
var steering = 0;
var throttle = 0;
if (this.leftButtonPressed || this.leftKeyPressed) steering++;
if (this.rightButtonPressed || this.rightKeyPressed) steering--;
if (this.upButtonPressed || this.upKeyPressed) throttle++;
if (this.downButtonPressed || this.downKeyPressed) throttle--;
targetVehicle.script.vehicle.fire('vehicle:controls', steering, throttle);
}
};