Difference between revisions of "FF8/Engine/WorldMapCamera"

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By MaKiPL. :*
 
By MaKiPL. :*
  
==Camera detail==
+
== Camera detail ==
Camera on world map is set to look-at target. Look at target is Squall, that is read from chara.one in world.fs file.  
+
 
 +
Camera on world map is set to look-at target. Look at target is Squall, that is read from chara.one in world.fs file.
  
 
As the camera is look-at, then it works and moves on "logic" sphere. Memory in FF8 is static. Camera memory starts soon after last face indice layout is hold. Is after 3-4 unknown NULL bytes.
 
As the camera is look-at, then it works and moves on "logic" sphere. Memory in FF8 is static. Camera memory starts soon after last face indice layout is hold. Is after 3-4 unknown NULL bytes.
  
===Camera build===
+
=== Camera build ===
 +
 
 
Remember! Values are '''little-endian'''!
 
Remember! Values are '''little-endian'''!
  
 
Physical camera location/translation:
 
Physical camera location/translation:
{| border="1" cellspacing="1" cellpadding="3" align="center" style="border: 1px solid black; border-collapse: collapse;"
+
 
! style="background:rgb(204,204,204)" | Offset
+
{| class="wikitable"
! style="background:rgb(204,204,204)" | Static memory address
+
! Offset
! style="background:rgb(204,204,204)" | Default or medium value
+
! Static memory address
! style="background:rgb(204,204,204)" | Type of value
+
! Default or medium value
! style="background:rgb(204,204,204)" | Description
+
! Type of value
 +
! Description
 
|-
 
|-
 
| 0
 
| 0
Line 33: Line 36:
 
| 00 E4 / 00 E0
 
| 00 E4 / 00 E0
 
| short (2 bytes signed)
 
| short (2 bytes signed)
| Distance between camera and look-at-target (physical)
+
| Distance between camera and look-at-target (physical)
 
|-
 
|-
 
| 8
 
| 8
Line 62: Line 65:
 
Others:
 
Others:
  
{| border="1" cellspacing="1" cellpadding="3" align="center" style="border: 1px solid black; border-collapse: collapse;"
+
{| class="wikitable"
! style="background:rgb(204,204,204)" | Static memory address
+
! Static memory address
! style="background:rgb(204,204,204)" | Default or medium value
+
! Default or medium value
! style="background:rgb(204,204,204)" | Type of value
+
! Type of value
! style="background:rgb(204,204,204)" | Description
+
! Description
 
|-
 
|-
 
| 0x01CA92E4
 
| 0x01CA92E4
Line 75: Line 78:
  
 
Logical zoom, for FF8 they're fixed values:
 
Logical zoom, for FF8 they're fixed values:
*640 - when camera mode is set to far
+
 
*1024 - when camera mode is set to near
+
* 640 - when camera mode is set to far
 +
* 1024 - when camera mode is set to near
 +
 
 
These zoom is operated, when you in-game set the camera near-far preferences. (F default in Steam release)
 
These zoom is operated, when you in-game set the camera near-far preferences. (F default in Steam release)
  
==Camera OPCODE==
+
== Camera OPCODE ==
 +
 
 +
PRESENTED OPCODE'S ARE FOR STEAM RELEASE! If no opcode for variable above, then this variable is mostly fixed and is not changed on world map itself. (This is for example static vars).
 +
 
 +
=== Camera logical zoom ===
  
PRESENTED OPCODE'S ARE FOR STEAM RELEASE!
 
If no opcode for variable above, then this variable is mostly fixed and is not changed on world map itself. (This is for example static vars).
 
===Camera logical zoom===
 
 
  FF8_EN.exe+5D7FA - mov [eax*4+FF8_EN.exe+18A927C],ecx
 
  FF8_EN.exe+5D7FA - mov [eax*4+FF8_EN.exe+18A927C],ecx
  
===Tangent Y===
+
=== Tangent Y ===
 +
 
 
  FF8_EN.exe+15901F - add word ptr [FF8_EN.exe+1C3ED00],-10
 
  FF8_EN.exe+15901F - add word ptr [FF8_EN.exe+1C3ED00],-10
 
  FF8_EN.exe+15900F - add word ptr [FF8_EN.exe+1C3ED00],10
 
  FF8_EN.exe+15900F - add word ptr [FF8_EN.exe+1C3ED00],10
Line 93: Line 100:
 
  FF8_EN.exe+15848D - mov [FF8_EN.exe+1C3ED00],ax
 
  FF8_EN.exe+15848D - mov [FF8_EN.exe+1C3ED00],ax
 
  FF8_EN.exe+1584C4 - mov [FF8_EN.exe+1C3ED00],dx
 
  FF8_EN.exe+1584C4 - mov [FF8_EN.exe+1C3ED00],dx
*ADD applies tick to smooth camera going down logic
 
*MOV applies camera going up and additional operations
 
  
===Tangent X===
+
* ADD applies tick to smooth camera going down logic
 +
* MOV applies camera going up and additional operations
 +
 
 +
=== Tangent X ===
 +
 
 
  FF8_EN.exe+158676 - add [FF8_EN.exe+1C3ED02],ax
 
  FF8_EN.exe+158676 - add [FF8_EN.exe+1C3ED02],ax
 
  FF8_EN.exe+15873E - add [FF8_EN.exe+1C3ED02],ax
 
  FF8_EN.exe+15873E - add [FF8_EN.exe+1C3ED02],ax
Line 102: Line 111:
 
  FF8_EN.exe+158936 - mov [ecx+0A],ax
 
  FF8_EN.exe+158936 - mov [ecx+0A],ax
  
*First ADD is applied on regular translation. The one that user can rotate in-game mainly
+
* First ADD is applied on regular translation. The one that user can rotate in-game mainly
*Second ADD is applied on translations when character is going eg. right, and camera is set to front  
+
* Second ADD is applied on translations when character is going eg. right, and camera is set to front
*Third ADD is applied when Squall has moved enough in one direction, so the camera is rotated hardly
+
* Third ADD is applied when Squall has moved enough in one direction, so the camera is rotated hardly
*Additional MOV is to finally check and correct camera rotation
+
* Additional MOV is to finally check and correct camera rotation

Latest revision as of 05:22, 23 May 2019

By MaKiPL. :*

Camera detail

Camera on world map is set to look-at target. Look at target is Squall, that is read from chara.one in world.fs file.

As the camera is look-at, then it works and moves on "logic" sphere. Memory in FF8 is static. Camera memory starts soon after last face indice layout is hold. Is after 3-4 unknown NULL bytes.

Camera build

Remember! Values are little-endian!

Physical camera location/translation:

Offset Static memory address Default or medium value Type of value Description
0 0x0203ECF8 0 short (2 bytes signed) Camera Y axis translation. Camera.Location.Y = (Squall.Location + THIS);
2 0x0203ECFA AB FE short (2 bytes signed) Camera X axis translation. Camera.Location.X = (Squall.Location.X + THIS);
4 0x0203ECFC 00 E4 / 00 E0 short (2 bytes signed) Distance between camera and look-at-target (physical)
8 0x0203ED00 ~FF 92 uint16 Operates camera tangent Y axis position. This is: hacking this to bird-fly view or like in RPG
10 0x0203ED02 ranges from 00 00 to 0F FF 12 bit Operates camera tangent Z axis position. This is: the same as rotating camera in-game
12 0x0203ED04 00 00 (FF 0F max) 12 bit Camera root rotation. For up-side down example. 9-12th bit is irrelevant. (1111 1111 xxxx 1111)
40 0x0203ED2C 0 bool RESET CAMERA

Others:

Static memory address Default or medium value Type of value Description
0x01CA92E4 1024/640 uint16 Logical camera zoom - Takes physical camera and applies logical zoom*

Logical zoom, for FF8 they're fixed values:

  • 640 - when camera mode is set to far
  • 1024 - when camera mode is set to near

These zoom is operated, when you in-game set the camera near-far preferences. (F default in Steam release)

Camera OPCODE

PRESENTED OPCODE'S ARE FOR STEAM RELEASE! If no opcode for variable above, then this variable is mostly fixed and is not changed on world map itself. (This is for example static vars).

Camera logical zoom

FF8_EN.exe+5D7FA - mov [eax*4+FF8_EN.exe+18A927C],ecx

Tangent Y

FF8_EN.exe+15901F - add word ptr [FF8_EN.exe+1C3ED00],-10
FF8_EN.exe+15900F - add word ptr [FF8_EN.exe+1C3ED00],10
FF8_EN.exe+1584EA - add word ptr [FF8_EN.exe+1C3ED00],04
FF8_EN.exe+15902C - mov [FF8_EN.exe+1C3ED00],ax
FF8_EN.exe+15848D - mov [FF8_EN.exe+1C3ED00],ax
FF8_EN.exe+1584C4 - mov [FF8_EN.exe+1C3ED00],dx
  • ADD applies tick to smooth camera going down logic
  • MOV applies camera going up and additional operations

Tangent X

FF8_EN.exe+158676 - add [FF8_EN.exe+1C3ED02],ax
FF8_EN.exe+15873E - add [FF8_EN.exe+1C3ED02],ax
FF8_EN.exe+15871A - add [FF8_EN.exe+1C3ED02],ax
FF8_EN.exe+158936 - mov [ecx+0A],ax
  • First ADD is applied on regular translation. The one that user can rotate in-game mainly
  • Second ADD is applied on translations when character is going eg. right, and camera is set to front
  • Third ADD is applied when Squall has moved enough in one direction, so the camera is rotated hardly
  • Additional MOV is to finally check and correct camera rotation