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EntityX# or EntityPitch# etc. bug

Blitz3D Forums/Blitz3D Beginners Area/EntityX# or EntityPitch# etc. bug

KimoTech(Posted 2005) [#1]
When i save my world (entity info) and i load it again, all the entities are placed wierd. But then when i save, and load them again, they're on their places again.

Code:

Function Save()

f=WriteFile("World.ent")
WriteByte f,Asc("W")
WriteByte f,Asc("L")
WriteByte f,Asc("D")
WriteFloat f,1.0

For e.Entity = Each Entity
WriteByte f,Asc("M") ; Mesh
WriteString f,e\Mesh$
WriteString f,e\Path$
WriteFloat f,EntityX#(e\Ent)
WriteFloat f,EntityY#(e\Ent)
WriteFloat f,EntityZ#(e\Ent)
WriteFloat f,EntityPitch#(e\Ent)
WriteFloat f,EntityYaw#(e\Ent)
WriteFloat f,EntityRoll#(e\Ent)
WriteFloat f,EntityScaleX#(e\Ent)
WriteFloat f,EntityScaleY#(e\Ent)
WriteFloat f,EntityScaleZ#(e\Ent)
Next
CloseFile f

End Function

Function Load()

f=ReadFile("World.ent")
ReadByte f:ReadByte f:ReadByte f
If ReadFloat(f)<>1.0 Then RuntimeError "Wrong file version!"
Repeat
Select Chr$(ReadByte(f))
Case "M"
e.Entity = New Entity
e\Mesh$=ReadString(f)
e\Path$=ReadString(f)
e\Ent = LoadMesh(e\path$+"\"+e\mesh$)
If e\Ent = 0 Then RuntimeError "Mesh doesent exist: "+CurrentDir()+"\"+e\path$+"\"+e\mesh$
PositionEntity e\Ent,ReadFloat(f),ReadFloat(f),ReadFloat(f)
RotateEntity e\Ent,ReadFloat(f),ReadFloat(f),ReadFloat(f)
ScaleEntity e\Ent,ReadFloat(f),ReadFloat(f),ReadFloat(f)
Default
RuntimeError "Version data and Entity Data doesn't match! Unknown entity type."
End Select
Until Eof(f)
CloseFile f

End Function


KimoTech(Posted 2005) [#2]
I've found the bug!!! If i swap EntityX# and EntityZ# then it works! Maybe the command EntityX really is EntityZ and twice. :)

WinXp SP2, AMD 64 3200+, 1024MB DDR2, GeForce 6800, DX 9.0c


Beaker(Posted 2005) [#3]
Your problem lies with these lines:
PositionEntity e\Ent,ReadFloat(f),ReadFloat(f),ReadFloat(f)

The ReadFloat() parts aren't guaranteed to be executed in a left to right order. You should read into temp variables first.

This is expected behaviour.


KimoTech(Posted 2006) [#4]
i'll try. :) How do you post links in your log? Sorry, but im new in Blitz Forums.


Koriolis(Posted 2006) [#5]
What are the forum codes?