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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 | import {
DISABLE_DEACTIVATION,
TYPES,
DEFAULT_VEHICLE_STATE,
BACK_LEFT,
BACK_RIGHT,
FRONT_LEFT,
FRONT_RIGHT,
DEFAULT_MAX_ENGINE_FORCE,
DEFAULT_MAX_BREAKING_FORCE,
DEFAULT_STEERING_CLAMP,
DEFAULT_STEERING_INCREMENT
} from '../constants';
import {
PHYSICS_EVENTS
} from '../messages';
import world from './world';
import dispatcher from './lib/dispatcher';
const DEFAULT_ROLL_INFLUENCE = 0.2;
const DEFAULT_FRICTION = 1000;
const DEFAULT_MASS = 800;
export const addVehicle = data => {
const {
position,
quaternion,
uuid,
wheels,
mass = DEFAULT_MASS,
width = 1.8,
height = .6,
length = 4,
friction = DEFAULT_FRICTION,
rollInfluence = DEFAULT_ROLL_INFLUENCE,
wheelsOptions = {},
suspensions = {}
} = data;
const { back = {}, front = {} } = wheelsOptions;
const {
axisPosition: axisPositionBack = -1,
radius: wheelRadiusBack = .4,
halfTrack: wheelHalfTrackBack = 1,
axisHeight: wheelAxisHeightBack = .3
} = back;
const {
axisPosition: axisPositionFront = 1.7,
radius: wheelRadiusFront = .4,
halfTrack: wheelHalfTrackFront = 1,
axisHeight: wheelAxisHeightFront = .3
} = front;
const { stiffness = 20.0, damping = 2.3, compression = 4.4, restLength = 0.6 } = suspensions;
// Chassis
const geometry = new Ammo.btBoxShape(new Ammo.btVector3(width * .5, height * .5, length * .5));
const transform = new Ammo.btTransform();
transform.setIdentity();
transform.setOrigin(new Ammo.btVector3(position.x, position.y, position.z));
transform.setRotation(new Ammo.btQuaternion(quaternion.x, quaternion.y, quaternion.z, quaternion.w));
const motionState = new Ammo.btDefaultMotionState(transform);
const localInertia = new Ammo.btVector3(0, 0, 0);
geometry.calculateLocalInertia(mass, localInertia);
const chassis = new Ammo.btRigidBody(new Ammo.btRigidBodyConstructionInfo(mass, motionState, geometry, localInertia));
chassis.setActivationState(DISABLE_DEACTIVATION);
world.addRigidBody(chassis);
// Raycast Vehicle
const tuning = new Ammo.btVehicleTuning();
const rayCaster = new Ammo.btDefaultVehicleRaycaster(world.getDynamicsWorld());
const vehicle = new Ammo.btRaycastVehicle(tuning, chassis, rayCaster);
vehicle.setCoordinateSystem(0, 1, 2);
world.addAction(vehicle);
const wheelDirectionCS0 = new Ammo.btVector3(0, -1, 0);
const wheelAxleCS = new Ammo.btVector3(-1, 0, 0);
const addWheel = (isFront, pos, radius) => {
var wheelInfo = vehicle.addWheel(
pos,
wheelDirectionCS0,
wheelAxleCS,
restLength,
radius,
tuning,
isFront);
wheelInfo.set_m_suspensionStiffness(stiffness);
wheelInfo.set_m_wheelsDampingRelaxation(damping);
wheelInfo.set_m_wheelsDampingCompression(compression);
wheelInfo.set_m_frictionSlip(friction);
wheelInfo.set_m_rollInfluence(rollInfluence);
}
addWheel(true, new Ammo.btVector3(wheelHalfTrackFront, wheelAxisHeightFront, axisPositionFront), wheelRadiusFront);
addWheel(true, new Ammo.btVector3(-wheelHalfTrackFront, wheelAxisHeightFront, axisPositionFront), wheelRadiusFront);
addWheel(false, new Ammo.btVector3(-wheelHalfTrackBack, wheelAxisHeightBack, axisPositionBack), wheelRadiusBack);
addWheel(false, new Ammo.btVector3(wheelHalfTrackBack, wheelAxisHeightBack, axisPositionBack), wheelRadiusBack);
vehicle.uuid = uuid;
world.addElement({
type: TYPES.VEHICLE,
uuid,
vehicle: vehicle,
wheels,
options: data,
state: DEFAULT_VEHICLE_STATE
});
}
export const setVehiclePosition = data => {
const { uuid, position } = data;
const element = world.getElement(uuid);
if (element.type === TYPES.VEHICLE) {
const body = element.vehicle.getRigidBody();
const transform = new Ammo.btTransform();
body.getWorldTransform(transform);
transform.setOrigin(new Ammo.btVector3(position.x, position.y, position.z ));
body.setWorldTransform(transform);
}
};
export const setVehicleQuaternion = data => {
const { uuid, quaternion } = data;
const element = world.getElement(uuid);
if (element.type === TYPES.VEHICLE) {
const body = element.vehicle.getRigidBody();
const transform = new Ammo.btTransform();
body.getWorldTransform(transform);
transform.setRotation(new Ammo.btQuaternion(quaternion.x, quaternion.y, quaternion.z, quaternion.w));
body.setWorldTransform(transform);
}
};
export const resetVehicle = data => {
const { uuid, quaternion, position } = data;
const element = world.getElement(uuid);
if (element.type === TYPES.VEHICLE) {
const body = element.vehicle.getRigidBody();
const transform = new Ammo.btTransform();
body.getWorldTransform(transform);
transform.setIdentity();
transform.setOrigin(new Ammo.btVector3(position.x, position.y, position.z ));
transform.setRotation(new Ammo.btQuaternion(quaternion.x, quaternion.y, quaternion.z, quaternion.w));
body.setWorldTransform(transform);
}
}
export const handleVehicleUpdate = ({ vehicle, wheels, uuid, state = DEFAULT_VEHICLE_STATE, options = {} }, dt) => {
let breakingForce = 0;
let engineForce = 0;
const {
steeringClamp = DEFAULT_STEERING_CLAMP,
steeringIncrement = DEFAULT_STEERING_INCREMENT,
maxEngineForce = DEFAULT_MAX_ENGINE_FORCE,
maxBreakingForce = DEFAULT_MAX_BREAKING_FORCE
} = options;
if (state.acceleration) {
if (speed < -1)
breakingForce = maxBreakingForce;
else engineForce = maxEngineForce;
}
if (state.braking) {
if (speed > 1)
breakingForce = maxBreakingForce;
else engineForce = -maxEngineForce / 2;
}
if (state.left) {
if (state.vehicleSteering < steeringClamp)
state.vehicleSteering += steeringIncrement;
} else {
if (state.right) {
if (state.vehicleSteering > -steeringClamp)
state.vehicleSteering -= steeringIncrement;
} else {
if (state.vehicleSteering < -steeringIncrement)
state.vehicleSteering += steeringIncrement;
else {
if (state.vehicleSteering > steeringIncrement)
state.vehicleSteering -= steeringIncrement;
else {
state.vehicleSteering = 0;
}
}
}
}
vehicle.applyEngineForce(engineForce, BACK_LEFT);
vehicle.applyEngineForce(engineForce, BACK_RIGHT);
vehicle.setBrake(breakingForce / 2, FRONT_LEFT);
vehicle.setBrake(breakingForce / 2, FRONT_RIGHT);
vehicle.setBrake(breakingForce, BACK_LEFT);
vehicle.setBrake(breakingForce, BACK_RIGHT);
vehicle.setSteeringValue(state.vehicleSteering, FRONT_LEFT);
vehicle.setSteeringValue(state.vehicleSteering, FRONT_RIGHT);
let tm, p, q, i;
const n = vehicle.getNumWheels();
for (i = 0; i < n; i++) {
vehicle.updateWheelTransform(i, true);
tm = vehicle.getWheelTransformWS(i);
p = tm.getOrigin();
q = tm.getRotation();
const wheelUUID = wheels[i];
dispatcher.sendBodyUpdate(wheelUUID, p, q, dt);
}
tm = vehicle.getChassisWorldTransform();
p = tm.getOrigin();
q = tm.getRotation();
const direction = vehicle.getForwardVector();
const speed = vehicle.getCurrentSpeedKmHour();
const extraData = {
direction: {
x: direction.x(),
y: direction.y(),
z: direction.z()
},
speed
}
dispatcher.sendBodyUpdate(uuid, p, q, dt, extraData);
world.updateBodyState(uuid, state);
} |