rswiki-book/317-Camera-shake.mediawiki

[[Category Packet]]
[[Category Packet 317]]
{{packet|name=Camera Shake|description=Makes the camera shake.|opcode=35|type=Fixed|length=4|revision=317}}
== Load Map Region ==

=== Description ===
description=Makes the camera shake.

=== Packet Structure ===

{| border=2
! Data type
! Description
|-
| [[Data Types#Standard data types|Byte]]
| Shake Type
|-
| [[Data Types#Standard data types|Byte]]
| Magnitude 1
|-
| [[Data Types#Standard data types|Byte]]
| Magnitude 2
|-
| [[Data Types#Standard data types|Byte]]
| Magnitude 3
|-
|}

=== Other Information ===
There are various loops/arrays within the map region loading functionality of the client which have been misunderstood by many.
{| border=2
! Shake Type
! Description
|-
| 0
| Shakes only on the X axis. (Camera Position)
|-
| 1
| Shakes only on the Z axis. (Camera Position)
|-
| 2
| Shakes only on the Y axis. (Camera Position)
|-
| 3
| Shakes only on the X curve. (Camera Curve?)
|-
| 4
| Shakes only on the Y curve. (Camera Curve?)
|-
|}

=== What it's doing ===
Below will show you the calculations it's doing to modify the screen's position to emulate an earthquake or just a shiver or shake.
{| border=2
! Calculation
! Formula
|-
| Magnitude
| ((Math.random() * (double)(Magnitude1[ShakeType] * 2 + 1) - (double)Magnitude1[ShakeType]) + Math.sin((double) anIntArray1030[ShakeType] * 3 ((double) Magnitude3[ShakeType] / 100D)) * Magnitude2[ShakeType])
|-
|}

=== Shake Types ===
{| border=2
! Shake Type
! Action
|-
| 0
| xCameraPos += [[Magnitude|Magnitude]]
|-
| 1
| zCameraPos += [[Magnitude|Magnitude]]
|-
| 2
| yCameraPos += [[Magnitude|Magnitude]]
|-
| 3
| xCameraCurve = xCameraCurve + [[Magnitude|Magnitude]] & 0x7ff;
|-
| 4
| yCameraCurve += [[Magnitude|Magnitude]]
|-
|}

=== Note ===
For shake type four it checks the yCameraCurve to make sure it's not out of bounds:
{| border=2
|-
|if (yCameraCurve < 128) then yCameraCurve = 128
|-
|if (yCameraCurve > 383) then yCameraCurve = 383
|-
|}