Test_Project_Cocos/DelayNoMore
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Finally fixed inconsistent pushbacks between frontend and backend.

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genxium
2022-12-26 22:42:26 +08:00
parent bb6055f48c
commit 335e11e925
8 changed files with 61 additions and 50 deletions
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82
jsexport/battle/battle.go
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@@ -224,8 +224,8 @@ func isPolygonPairSeparatedByDir(a, b *resolv.ConvexPolygon, e resolv.Vector, re
func WorldToVirtualGridPos(wx, wy, worldToVirtualGridRatio float64) (int32, int32) {
// [WARNING] Introduces loss of precision!
// In JavaScript floating numbers suffer from seemingly non-deterministic arithmetics, and even if certain libs solved this issue by approaches such as fixed-point-number, they might not be used in other libs -- e.g. the "collision libs" we're interested in -- thus couldn't kill all pains.
var virtualGridX int32 = int32(math.Round(wx * worldToVirtualGridRatio))
var virtualGridY int32 = int32(math.Round(wy * worldToVirtualGridRatio))
var virtualGridX int32 = int32(math.Floor(wx * worldToVirtualGridRatio))
var virtualGridY int32 = int32(math.Floor(wy * worldToVirtualGridRatio))
return virtualGridX, virtualGridY
}
@@ -254,30 +254,42 @@ func VirtualGridToPolygonColliderBLPos(vx, vy int32, halfBoundingW, halfBounding
return WorldToPolygonColliderBLPos(wx, wy, halfBoundingW, halfBoundingH, topPadding, bottomPadding, leftPadding, rightPadding, collisionSpaceOffsetX, collisionSpaceOffsetY)
}
func calcHardPushbacksNorms(playerCollider *resolv.Object, playerShape *resolv.ConvexPolygon, snapIntoPlatformOverlap float64, pEffPushback *Vec2D) []Vec2D {
func calcHardPushbacksNorms(joinIndex int32, playerCollider *resolv.Object, playerShape *resolv.ConvexPolygon, snapIntoPlatformOverlap float64, pEffPushback *Vec2D) *[]Vec2D {
ret := make([]Vec2D, 0, 10) // no one would simultaneously have more than 5 hardPushbacks
collision := playerCollider.Check(0, 0)
if nil == collision {
return ret
return &ret
}
//playerColliderCenterX, playerColliderCenterY := playerCollider.Center()
//fmt.Printf("joinIndex=%d calcHardPushbacksNorms has non-empty collision;playerColliderPos=(%.2f,%.2f)\n", joinIndex, playerColliderCenterX, playerColliderCenterY)
for _, obj := range collision.Objects {
isBarrier := false
switch obj.Data.(type) {
case *Barrier:
barrierShape := obj.Shape.(*resolv.ConvexPolygon)
overlapped, pushbackX, pushbackY, overlapResult := CalcPushbacks(0, 0, playerShape, barrierShape)
if !overlapped {
continue
}
// ALWAY snap into hardPushbacks!
// [OverlapX, OverlapY] is the unit vector that points into the platform
pushbackX, pushbackY = (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapX, (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapY
ret = append(ret, Vec2D{X: overlapResult.OverlapX, Y: overlapResult.OverlapY})
pEffPushback.X += pushbackX
pEffPushback.Y += pushbackY
case *PlayerDownsync:
case *MeleeBullet:
default:
// By default it's a regular barrier, even if data is nil, note that Golang syntax of switch-case is kind of confusing, this "default" condition is met only if "!*PlayerDownsync && !*MeleeBullet".
isBarrier = true
}
if !isBarrier {
continue
}
barrierShape := obj.Shape.(*resolv.ConvexPolygon)
overlapped, pushbackX, pushbackY, overlapResult := CalcPushbacks(0, 0, playerShape, barrierShape)
if !overlapped {
continue
}
// ALWAY snap into hardPushbacks!
// [OverlapX, OverlapY] is the unit vector that points into the platform
pushbackX, pushbackY = (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapX, (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapY
ret = append(ret, Vec2D{X: overlapResult.OverlapX, Y: overlapResult.OverlapY})
pEffPushback.X += pushbackX
pEffPushback.Y += pushbackY
//fmt.Printf("joinIndex=%d calcHardPushbacksNorms found one hardpushback; immediatePushback=(%.2f,%.2f)\n", joinIndex, pushbackX, pushbackY)
}
return ret
return &ret
}
// [WARNING] The params of this method is carefully tuned such that only "battle.RoomDownsyncFrame" is a necessary custom struct.
@@ -312,7 +324,7 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputList, delaye
}
effPushbacks := make([]Vec2D, roomCapacity)
hardPushbackNorms := make([][]Vec2D, roomCapacity)
hardPushbackNorms := make([]*[]Vec2D, roomCapacity)
// 1. Process player inputs
if nil != delayedInputList {
@@ -385,13 +397,12 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputList, delaye
collisionPlayerIndex := COLLISION_PLAYER_INDEX_PREFIX + joinIndex
playerCollider := collisionSysMap[collisionPlayerIndex]
playerShape := playerCollider.Shape.(*resolv.ConvexPolygon)
hardPushbackNorms[joinIndex-1] = calcHardPushbacksNorms(playerCollider, playerShape, snapIntoPlatformOverlap, &(effPushbacks[joinIndex-1]))
hardPushbackNorms[joinIndex-1] = calcHardPushbacksNorms(joinIndex, playerCollider, playerShape, snapIntoPlatformOverlap, &(effPushbacks[joinIndex-1]))
thatPlayerInNextFrame := nextRenderFramePlayers[i]
fallStopping := false
landedOnGravityPushback := false
if collision := playerCollider.Check(0, 0); nil != collision {
for _, obj := range collision.Objects {
isBarrier, isAnotherPlayer, isBullet := false, false, false
// TODO: Make this part work in JavaScript without having to expose all types Barrier/PlayerDownsync/MeleeBullet by js.MakeWrapper.
switch obj.Data.(type) {
case *PlayerDownsync:
isAnotherPlayer = true
@@ -411,17 +422,11 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputList, delaye
continue
}
normAlignmentWithGravity := (overlapResult.OverlapX*float64(0) + overlapResult.OverlapY*float64(-1.0))
landedOnGravityPushback := (snapIntoPlatformThreshold < normAlignmentWithGravity) // prevents false snapping on the lateral sides
if landedOnGravityPushback {
// kindly note that one player might land on top of another player, and snapping is also required in such case
pushbackX, pushbackY = (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapX, (overlapResult.Overlap-snapIntoPlatformOverlap)*overlapResult.OverlapY
thatPlayerInNextFrame.InAir = false
}
if isAnotherPlayer {
// [WARNING] The "zero overlap collision" might be randomly detected/missed on either frontend or backend, to have deterministic result we added paddings to all sides of a playerCollider. As each velocity component of (velX, velY) being a multiple of 0.5 at any renderFrame, each position component of (x, y) can only be a multiple of 0.5 too, thus whenever a 1-dimensional collision happens between players from [player#1: i*0.5, player#2: j*0.5, not collided yet] to [player#1: (i+k)*0.5, player#2: j*0.5, collided], the overlap becomes (i+k-j)*0.5+2*s, and after snapping subtraction the effPushback magnitude for each player is (i+k-j)*0.5, resulting in 0.5-multiples-position for the next renderFrame.
pushbackX, pushbackY = (overlapResult.Overlap-snapIntoPlatformOverlap*2)*overlapResult.OverlapX, (overlapResult.Overlap-snapIntoPlatformOverlap*2)*overlapResult.OverlapY
}
for _, hardPushbackNorm := range hardPushbackNorms[joinIndex-1] {
for _, hardPushbackNorm := range *hardPushbackNorms[joinIndex-1] {
projectedMagnitude := pushbackX*hardPushbackNorm.X + pushbackY*hardPushbackNorm.Y
if isBarrier || (isAnotherPlayer && 0 > projectedMagnitude) {
pushbackX -= projectedMagnitude * hardPushbackNorm.X
@@ -430,16 +435,23 @@ func ApplyInputFrameDownsyncDynamicsOnSingleRenderFrame(delayedInputList, delaye
}
effPushbacks[joinIndex-1].X += pushbackX
effPushbacks[joinIndex-1].Y += pushbackY
if currPlayerDownsync.InAir && landedOnGravityPushback {
fallStopping = true
if snapIntoPlatformThreshold < normAlignmentWithGravity {
landedOnGravityPushback = true
//playerColliderCenterX, playerColliderCenterY := playerCollider.Center()
//fmt.Printf("joinIndex=%d landedOnGravityPushback\n{renderFrame.id: %d, isBarrier: %v, isAnotherPlayer: %v}\nhardPushbackNormsOfThisPlayer=%v, playerColliderPos=(%.2f,%.2f), immediatePushback={%.3f, %.3f}, effPushback={%.3f, %.3f}, overlapMag=%.4f\n", joinIndex, currRenderFrame.Id, isBarrier, isAnotherPlayer, *hardPushbackNorms[joinIndex-1], playerColliderCenterX, playerColliderCenterY, pushbackX, pushbackY, effPushbacks[joinIndex-1].X, effPushbacks[joinIndex-1].Y, overlapResult.Overlap)
}
}
}
if fallStopping {
thatPlayerInNextFrame.VelX = 0
thatPlayerInNextFrame.VelY = 0
thatPlayerInNextFrame.CharacterState = ATK_CHARACTER_STATE_IDLE1
thatPlayerInNextFrame.FramesToRecover = 0
if landedOnGravityPushback {
thatPlayerInNextFrame.InAir = false
if currPlayerDownsync.InAir {
// fallStopping
thatPlayerInNextFrame.VelX = 0
thatPlayerInNextFrame.VelY = 0
thatPlayerInNextFrame.CharacterState = ATK_CHARACTER_STATE_IDLE1
thatPlayerInNextFrame.FramesToRecover = 0
}
}
if currPlayerDownsync.InAir {
oldNextCharacterState := thatPlayerInNextFrame.CharacterState