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createRagdoll.js
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createRagdoll.js
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////////////////////////////////////////////////////////////////////////////////////////
//
// Ragdoll
//
const ragdollDefaults = {
shouldersDistance: 0.5,
upperArmLength: 0.5,
lowerArmLength: 0.5,
upperArmSize: 0.2,
lowerArmSize: 0.2,
neckLength: 0.1,
headRadius: 0.25,
upperBodyLength: 0.6,
pelvisLength: 0.4,
upperLegLength: 0.6,
upperLegSize: 0.2,
lowerLegSize: 0.2,
lowerLegLength: 0.6,
}
const createRagdoll = (p2, x, y, options = {}) => {
const { isSideView, isOther } = options
const collisionMask = OTHER | GROUND
const {
shouldersDistance,
upperArmLength,
lowerArmLength,
upperArmSize,
lowerArmSize,
neckLength,
headRadius,
upperBodyLength,
pelvisLength,
upperLegLength,
upperLegSize,
lowerLegSize,
lowerLegLength,
} = ragdollDefaults
const limbDistance = isSideView ? shouldersDistance : 0.1
// Head
var head = new p2.Body({
mass: 1,
position: [x, y + pelvisLength + upperBodyLength + headRadius + neckLength],
})
var headShape = new p2.Circle({ radius: headRadius })
headShape.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_CENTER
headShape.collisionMask = collisionMask
head.addShape(headShape)
// Upper Body
var upperBody = new p2.Body({
mass: 1,
position: [x, y + pelvisLength + upperBodyLength / 2],
})
var upperBodyShape = new p2.Box({
width: shouldersDistance,
height: upperBodyLength,
})
upperBodyShape.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_CENTER
upperBodyShape.collisionMask = collisionMask
upperBody.addShape(upperBodyShape)
// Neck joint
var neckJoint = new p2.RevoluteConstraint(head, upperBody, {
localPivotA: [0, -headRadius - neckLength / 2],
localPivotB: [0, upperBodyLength / 2],
})
neckJoint.setLimits(-Math.PI / 8, Math.PI / 8)
// Upper Left Arm
var upperLeftArm = new p2.Body({
mass: 1,
position: [
x + limbDistance/2 + upperArmLength / 2,
upperBody.position[1] + upperBodyLength / 2,
],
})
var upperArmShapeLeft = new p2.Box({
width: upperArmLength,
height: upperArmSize,
})
upperArmShapeLeft.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_LEFT
upperArmShapeLeft.collisionMask = collisionMask
upperLeftArm.addShape(upperArmShapeLeft)
// Upper Right Arm
var upperRightArm = new p2.Body({
mass: 1,
position: [
x - limbDistance/2 - upperArmLength / 2,
upperBody.position[1] + upperBodyLength / 2,
],
})
var upperArmShapeRight = new p2.Box({
width: upperArmLength,
height: upperArmSize,
})
upperArmShapeRight.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_RIGHT
upperArmShapeRight.collisionMask = collisionMask
upperRightArm.addShape(upperArmShapeRight)
// Shoulders
var leftShoulder = new p2.RevoluteConstraint(upperBody, upperLeftArm, {
localPivotA: [limbDistance/2, upperBodyLength / 2],
localPivotB: [upperArmLength / 2, 0],
})
var rightShoulder = new p2.RevoluteConstraint(upperBody, upperRightArm, {
localPivotA: [-limbDistance/2, upperBodyLength / 2],
localPivotB: [-upperArmLength / 2, 0],
})
//leftShoulder.setLimits(-Math.PI / 3, Math.PI / 3)
//rightShoulder.setLimits(-Math.PI / 3, Math.PI / 3)
// Lower Left Arm
var lowerLeftArm = new p2.Body({
mass: 1,
position: [
upperLeftArm.position[0] + lowerArmLength / 2 + upperArmLength / 2,
upperLeftArm.position[1],
],
})
var lowerArmShapeLeft = new p2.Box({
width: lowerArmLength,
height: lowerArmSize,
})
lowerArmShapeLeft.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_LEFT
lowerArmShapeLeft.collisionMask = collisionMask
lowerLeftArm.addShape(lowerArmShapeLeft)
// Lower Right Arm
var lowerRightArm = new p2.Body({
mass: 1,
position: [
upperRightArm.position[0] - lowerArmLength / 2 - upperArmLength / 2,
upperRightArm.position[1],
],
})
var lowerArmShapeRight = new p2.Box({
width: lowerArmLength,
height: lowerArmSize,
})
lowerArmShapeRight.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_RIGHT
lowerArmShapeRight.collisionMask = collisionMask
lowerRightArm.addShape(lowerArmShapeRight)
// Elbow joint
var leftElbowJoint = new p2.RevoluteConstraint(lowerLeftArm, upperLeftArm, {
localPivotA: [lowerArmLength / 2, 0],
localPivotB: [-upperArmLength / 2, 0],
})
var rightElbowJoint = new p2.RevoluteConstraint(
lowerRightArm,
upperRightArm,
{
localPivotA: [-lowerArmLength / 2, 0],
localPivotB: [upperArmLength / 2, 0],
}
)
leftElbowJoint.setLimits(-Math.PI / 2, 0)
rightElbowJoint.setLimits(-Math.PI / 2, 0)
// Pelvis
var pelvis = new p2.Body({
mass: 1,
position: [x, y + pelvisLength / 2],
})
var pelvisShape = new p2.Box({
width: shouldersDistance,
height: pelvisLength,
})
pelvisShape.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_CENTER
pelvisShape.collisionMask = collisionMask
pelvis.addShape(pelvisShape)
// Spine Joint
var spineJoint = new p2.RevoluteConstraint(pelvis, upperBody, {
localPivotA: [0, pelvisLength / 2],
localPivotB: [0, -upperBodyLength / 2],
})
spineJoint.setLimits(-Math.PI / 8, Math.PI / 8)
world.addConstraint(spineJoint)
// Upper Left Leg
var upperLeftLeg = new p2.Body({
mass: 1,
position: [
pelvis.position[0] + limbDistance / 2,
pelvis.position[1] - pelvisLength / 2 - upperLegLength / 2,
],
})
var upperLegShapeLeft = new p2.Box({
width: upperLegSize,
height: upperLegLength,
})
upperLegShapeLeft.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_LEFT
upperLegShapeLeft.collisionMask = collisionMask
upperLeftLeg.addShape(upperLegShapeLeft)
// Upper Right Leg
var upperRightLeg = new p2.Body({
mass: 1,
position: [
pelvis.position[0] - limbDistance / 2,
pelvis.position[1] - pelvisLength / 2 - upperLegLength / 2,
],
})
var upperLegShapeRight = new p2.Box({
width: upperLegSize,
height: upperLegLength,
})
upperLegShapeRight.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_RIGHT
upperLegShapeRight.collisionMask = collisionMask
upperRightLeg.addShape(upperLegShapeRight)
// Hip joints
var leftHipJoint = new p2.RevoluteConstraint(upperLeftLeg, pelvis, {
localPivotA: [0, upperLegLength / 2],
localPivotB: [limbDistance/2, -pelvisLength / 2],
})
var rightHipJoint = new p2.RevoluteConstraint(upperRightLeg, pelvis, {
localPivotA: [0, upperLegLength / 2],
localPivotB: [-limbDistance/2, -pelvisLength / 2],
})
if (!isSideView) {
leftHipJoint.setLimits(-Math.PI / 2, Math.PI / 2)
rightHipJoint.setLimits(-Math.PI / 2, Math.PI / 2)
} else {
leftHipJoint.setLimits(-Math.PI / 8, Math.PI / 8)
rightHipJoint.setLimits(-Math.PI / 8, Math.PI / 8)
}
// Lower Left Leg
var lowerLeftLeg = new p2.Body({
mass: 1,
position: [
upperLeftLeg.position[0],
upperLeftLeg.position[1] - lowerLegLength,
],
})
var lowerLegShapeLeft = new p2.Box({
width: lowerLegSize,
height: lowerLegLength,
})
lowerLegShapeLeft.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_LEFT
lowerLegShapeLeft.collisionMask = collisionMask
lowerLeftLeg.addShape(lowerLegShapeLeft)
// Lower Right Leg
var lowerRightLeg = new p2.Body({
mass: 1,
position: [
upperRightLeg.position[0],
upperRightLeg.position[1] - lowerLegLength,
],
})
var lowerLegShapeRight = new p2.Box({
width: lowerLegSize,
height: lowerLegLength,
})
lowerLegShapeRight.collisionGroup = isOther ? OTHER_RAGDOLL : BODY_RIGHT
lowerLegShapeRight.collisionMask = collisionMask
lowerRightLeg.addShape(lowerLegShapeRight)
// Knee joints
var leftKneeJoint = new p2.RevoluteConstraint(lowerLeftLeg, upperLeftLeg, {
localPivotA: [0, lowerLegLength / 2],
localPivotB: [0, -upperLegLength / 2],
})
var rightKneeJoint = new p2.RevoluteConstraint(lowerRightLeg, upperRightLeg, {
localPivotA: [0, lowerLegLength / 2],
localPivotB: [0, -upperLegLength / 2],
})
if (!isSideView) {
leftKneeJoint.setLimits(upperLeftLeg.angle, Math.PI)
rightKneeJoint.setLimits(upperRightLeg.angle, Math.PI)
} else {
leftKneeJoint.setLimits(-Math.PI / 8, Math.PI / 8)
rightKneeJoint.setLimits(-Math.PI / 8, Math.PI / 8)
}
const bodyParts = [
lowerLeftLeg,
lowerRightLeg,
upperLeftLeg,
upperRightLeg,
pelvis,
upperBody,
head,
upperLeftArm,
upperRightArm,
lowerLeftArm,
lowerRightArm,
]
return bodyParts
}
const createRagdollConstraints = (p2, bodyParts, options = {}) => {
const lowerLeftLeg = bodyParts[0]
const lowerRightLeg = bodyParts[1]
const upperLeftLeg = bodyParts[2]
const upperRightLeg = bodyParts[3]
const pelvis = bodyParts[4]
const upperBody = bodyParts[5]
const head = bodyParts[6]
const upperLeftArm = bodyParts[7]
const upperRightArm = bodyParts[8]
const lowerLeftArm = bodyParts[9]
const lowerRightArm = bodyParts[10]
const {
shouldersDistance,
upperArmLength,
lowerArmLength,
upperArmSize,
lowerArmSize,
neckLength,
headRadius,
upperBodyLength,
pelvisLength,
upperLegLength,
upperLegSize,
lowerLegSize,
lowerLegLength,
} = ragdollDefaults
const { isSideView } = options
const limbDistance = isSideView ? shouldersDistance : 0.1
// Neck joint
var neckJoint = new p2.RevoluteConstraint(head, upperBody, {
localPivotA: [0, -headRadius - neckLength / 2],
localPivotB: [0, upperBodyLength / 2],
})
neckJoint.setLimits(-Math.PI / 8, Math.PI / 8)
// Shoulder joints
var leftShoulder = new p2.RevoluteConstraint(upperBody, upperLeftArm, {
localPivotA: [limbDistance/2, upperBodyLength / 2],
localPivotB: [-upperArmLength / 2, 0],
})
var rightShoulder = new p2.RevoluteConstraint(upperBody, upperRightArm, {
localPivotA: [-limbDistance/2, upperBodyLength / 2],
localPivotB: [upperArmLength / 2, 0],
})
//leftShoulder.setLimits(-Math.PI / 3, Math.PI / 3)
//rightShoulder.setLimits(-Math.PI / 3, Math.PI / 3)
// Elbow joint
var leftElbowJoint = new p2.RevoluteConstraint(lowerLeftArm, upperLeftArm, {
localPivotA: [-lowerArmLength / 2, 0],
localPivotB: [upperArmLength / 2, 0],
})
var rightElbowJoint = new p2.RevoluteConstraint(
lowerRightArm,
upperRightArm,
{
localPivotA: [lowerArmLength / 2, 0],
localPivotB: [-upperArmLength / 2, 0],
}
)
leftElbowJoint.setLimits(-Math.PI / 2, 0)
rightElbowJoint.setLimits(-Math.PI / 2, 0)
// Spine Joint
var spineJoint = new p2.RevoluteConstraint(pelvis, upperBody, {
localPivotA: [0, pelvisLength / 2],
localPivotB: [0, -upperBodyLength / 2],
})
spineJoint.setLimits(-Math.PI / 8, Math.PI / 8)
world.addConstraint(spineJoint)
// Hip joints
var leftHipJoint = new p2.RevoluteConstraint(upperLeftLeg, pelvis, {
localPivotA: [0, upperLegLength / 2],
localPivotB: [limbDistance/2, -pelvisLength / 2],
})
var rightHipJoint = new p2.RevoluteConstraint(upperRightLeg, pelvis, {
localPivotA: [0, upperLegLength / 2],
localPivotB: [-limbDistance/2, -pelvisLength / 2],
})
if (!isSideView) {
leftHipJoint.setLimits(-Math.PI / 2, Math.PI / 2)
rightHipJoint.setLimits(-Math.PI / 2, Math.PI / 2)
} else {
leftHipJoint.setLimits(-Math.PI / 8, Math.PI / 8)
rightHipJoint.setLimits(-Math.PI / 8, Math.PI / 8)
}
// Knee joints
var leftKneeJoint = new p2.RevoluteConstraint(lowerLeftLeg, upperLeftLeg, {
localPivotA: [0, lowerLegLength / 2],
localPivotB: [0, -upperLegLength / 2],
})
var rightKneeJoint = new p2.RevoluteConstraint(lowerRightLeg, upperRightLeg, {
localPivotA: [0, lowerLegLength / 2],
localPivotB: [0, -upperLegLength / 2],
})
if (!isSideView) {
leftKneeJoint.setLimits(upperLeftLeg.angle, Math.PI)
rightKneeJoint.setLimits(upperRightLeg.angle, Math.PI)
} else {
leftKneeJoint.setLimits(-Math.PI / 8, Math.PI / 8)
rightKneeJoint.setLimits(-Math.PI / 8, Math.PI / 8)
}
const constraints = [
neckJoint,
leftShoulder,
rightShoulder,
leftElbowJoint,
rightElbowJoint,
spineJoint,
leftHipJoint,
rightHipJoint,
leftKneeJoint,
rightKneeJoint,
]
return constraints
}