Fast World2Screen Transform (Synced/Async)

[Regno]

can I have a jass version please ?

 

[Antares]

can I have a jass version please ?

You can, but if you're looking for a screen mouse position, @moddiemads system is the superior one. If that's what you're looking for, you should ask him for a JASS version.

 

[Regno]

You can, but if you're looking for a screen mouse position, @moddiemads system is the superior one. If that's what you're looking for, you should ask him for a JASS version.

Omg thank you antares <3

 

[Antares]

I've decided to refactor the old mouse position library and made this small snippet that concerns itself only with transforming from world to screen coordinates and back. Because, for purely async mouse screen positions, @moddiemads' system (which I'm sure he'll update any minute now) is superior, my system should be used in a context where either you need to know the screen positions of objects other than the mouse or the mouse positions need to be synced.

 

[Wrda]

(which I'm sure he'll update any minute now)

Every day he's closer to the finish line by 50% of the current time, but he'll never get to 100%

 

[Wrda]

Math beyond me, magic numbers, a recipe for great explosion of excitedness.
Looks optimized, and works spectacularly.

Approved

 

[Antares]

magic numbers

Don't ask me why they are the way they are btw. I have no freakin' clue!

 

[Antares]

I'm a certified dingus. Of course the syncing won't work if there's only one set of camera parameters between players and each player needs his or her own. So, I uploaded a separate version for synced values that uses tables instead of numbers.

 

[Xthreo]

It seems the World2Screen function is only valid with WC3’s default camera’s AoA.
When I try the test map and zoom in, the frame doesn’t follow the mouse anymore
Am I missing something?

 

[Antares]

The function works for every camera angle and rotation. The frame not following is probably because of how the mouse natives work; the mouse position only updates when you move the mouse cursor, not when the camera moves. The frame can also not move into the widescreen area.

 

[Xthreo]

The function works for every camera angle and rotation. The frame not following is probably because of how the mouse natives work; the mouse position only updates when you move the mouse cursor, not when the camera moves. The frame can also not move into the widescreen area.

With a fixed camera, fully zoomed in, these are the results I am getting in the test map:

middle of the screen OK



top right (not widescreen area) Invalid

bottom left (not widescreen area) Invalid



the margin of error increases the further I move from the center of the screen

 

[Antares]

That is odd. It works perfectly fine for me. Only difference I see is that you're on Reforged graphics. But that can't be it, can it?

 

[Wrda]

Fast World2Screen Transform Reforged Edition Re-Reforged should solve it.
Honestly I wouldn't surprise if that was the case. Try to test it with classic graphics

 

[Xthreo]

I just tested it in Classic graphics, and it works perfectly....

Maybe (and I'm taking a big leap here) in reforged the size of the screen is calculated differently, because the frame is never far off, just like if we're missing a ratio added to the calculations

 

[Antares]

The most reasonable explanation would be that Reforged graphics use a different field of view. Can you do print(GetCameraField(CAMERA_FIELD_FIELD_OF_VIEW)) in Reforged and Classic graphics and see if it's different? I would do it, but I don't own Reforged.

 

[Antares]

The Field of View is in fact different in Reforged than it is in Classic (77° vs. 70°). I tested it with the Reforged field of view and I get an error, but it's actually the opposite of the direction of your error, so I'm even more confused now.

 

[Xthreo]

The Field of View is in fact different in Reforged than it is in Classic (77° vs. 70°). I tested it with the Reforged field of view and I get an error, but it's actually the opposite of the direction of your error, so I'm even more confused now.

View attachment 490547

That’s interesting and indeed very confusing, also is there a way to detect if the player is using SD or HD graphics?

 

[Elprede]

That’s interesting and indeed very confusing, also is there a way to detect if the player is using SD or HD graphics?

There is this library [vJASS] - Detect Reforged.

 

[Antares]

The field of view changes for the Reforged camera as you zoom in and out. It is constant for the SD graphics camera. So, the HD camera zooms in, the SD camera moves the eye closer to the target. So I can set the field of view to different values and try to find the correct magic numbers and then derive the general solution for it.

 

[Antares]

@Xthreo Try this version.

 

[Xthreo]

@Xthreo Try this version.

@Antares , there is nothing you cannot fix
Big thanks, it works like a charm!

 

[Antares]

@Antares , there is nothing you cannot fix
Big thanks, it works like a charm!

Great, I was worried there were more parameters that are different about the Reforged camera!

 

[Antares]

I updated the synced version and included a library that continously syncs camera parameters. I also added an integration with Fixed Camera Lock and added the GetTriggerPlayerMouseScreenCoordinates function.

 

[Wrda]

Nice.



Wrda deepstrasz was here right when he clicked on alerts

 

[Antares]

Updated SyncedCamera to fix a severe bug that will tank everyone's ping and render the game unplayable.

 

[Regno]

@Antares I think maddiemad wont make jass so we only have you to turn to

edit: did it myself, seems to work

 

[Antares]

@Antares I think maddiemad wont make jass so we only have you to turn to

edit: did it myself, seems to work

Nice, can you share it?

 

[Regno]

Nice, can you share it?

I shared it to two people on hive dms because they know I use wurst and they do too, so the "conversion" is not really to Jass but to Wurst xD (sorry for confusion) so doubt it will be useful to share

And I had AI help with the math because I suck at math except basics (used ur works as reference), once I tested it thoroughly and the other guys too, then I will be confident to share it if still desired. But it works for now at least.

For example on Sample Code 1, I have absolutely no clue what is going on here

Spoiler: Sample code 1

public function screen2WorldSynced(real x, real y, player whichPlayer) returns WorldIntersection
    let pid = ensureCameraState(whichPlayer)
    if pid < 0
        return WorldIntersection(0., 0., 0., false)
    let a = (x - 0.4) * scaleFactor[pid]
    let b = (0.42625 - yCenterScreenShift[pid] - y) * scaleFactor[pid]
    let denominator = safeSqrt(1. + a * a + b * b)
    if denominator <= SQRT_EPSILON
        return WorldIntersection(eyeX[pid], eyeY[pid], eyeZ[pid], false)
    let nx = 1. / denominator
    var ny = safeSqrt(1. - (1. + b * b) * nx * nx)
    var nz = safeSqrt(1. - nx * nx - ny * ny)
    if a > 0.
        ny = -ny
    if b < 0.
        nz = -nz
    let nxPrime = cosAttackCosRot[pid] * nx - sinRot[pid] * ny + sinAttackCosRot[pid] * nz
    let nyPrime = cosAttackSinRot[pid] * nx + cosRot[pid] * ny + sinAttackSinRot[pid] * nz
    let nzPrime = -sinAttack[pid] * nx + cosAttack[pid] * nz
    if nzPrime.abs() < SQRT_EPSILON
        return WorldIntersection(eyeX[pid], eyeY[pid], eyeZ[pid], false)
    let terrainGuess = getTerrainZ(eyeX[pid], eyeY[pid])
    var xGuess = eyeX[pid] + nxPrime * (eyeZ[pid] - terrainGuess) / nzPrime
    var yGuess = eyeY[pid] + nyPrime * (eyeZ[pid] - terrainGuess) / nzPrime
    var zWorld = getTerrainZ(xGuess, yGuess)
    var deltaZ = zWorld - terrainGuess
    var zGuess = zWorld
    int i = 0
    while (deltaZ > 1. or deltaZ < -1.) and i < 50
        let zWorldOld = zWorld
        let deltaZOld = deltaZ
        xGuess = eyeX[pid] + nxPrime * (eyeZ[pid] - zGuess) / nzPrime
        yGuess = eyeY[pid] + nyPrime * (eyeZ[pid] - zGuess) / nzPrime
        zWorld = getTerrainZ(xGuess, yGuess)
        deltaZ = zWorld - zGuess
        if (deltaZOld - deltaZ).abs() < SQRT_EPSILON
            return WorldIntersection(xGuess, yGuess, zWorld, false)
        zGuess = (deltaZOld * zWorld - deltaZ * zWorldOld) / (deltaZOld - deltaZ)
        i += 1
    return WorldIntersection(xGuess, yGuess, zWorld, i < 50)

Spoiler: Sample Code 2

public class SyncedCamera
    static player localPlayer = null
    static boolean array ready
    static real array eyeX
    static real array eyeY
    static real array eyeZ
    static real array angleOfAttack
    static real array rotation
    static real array fieldOfView
    static real array targetDistance

    static function getIndex(player whichPlayer) returns int
        return whichPlayer != null ? whichPlayer.getId() : -1

    static function differenceExceeds(real currentValue, real storedValue) returns boolean
        return realAbs(currentValue - storedValue) > EPSILON

    static function onSync()
        let data = BlzGetTriggerSyncData()
        var parsedPlayerIndex = -1
        var fieldIndex = 0
        for string part in data.split(",")
            if fieldIndex == 0
                parsedPlayerIndex = part.toInt() - 1
            else if parsedPlayerIndex >= 0 and parsedPlayerIndex < bj_MAX_PLAYER_SLOTS
                switch fieldIndex
                    case 1
                        eyeX[parsedPlayerIndex] = part.toReal()
                    case 2
                        eyeY[parsedPlayerIndex] = part.toReal()
                    case 3
                        eyeZ[parsedPlayerIndex] = part.toReal()
                    case 4
                        angleOfAttack[parsedPlayerIndex] = part.toReal()
                    case 5
                        rotation[parsedPlayerIndex] = part.toReal()
                    case 6
                        fieldOfView[parsedPlayerIndex] = part.toReal()
                    case 7
                        targetDistance[parsedPlayerIndex] = part.toReal()
            fieldIndex += 1
        if parsedPlayerIndex >= 0 and parsedPlayerIndex < bj_MAX_PLAYER_SLOTS
            ready[parsedPlayerIndex] = true

 

[a77221232]

Can anyone give me a map of version 1.27A? I can't use it.

 

[Antares]

Sorry, I'm fresh out of stock on 1.27a maps.