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Christoph Hormann wrote:
>
>
> Tom Bates wrote:
> >
> > [...]
> >
> > I would be extremely grateful if someone could enlighten me as to what I need to
do.
> > If you need more information than what I've provided here, please let me know.
>
> You should post your code (the mechsim block would be sufficient).
>
> Christoph
>
Thank you, Christoph, for your attention.
I've included relevant bits from my scene file, below.
A little additional explanation:
I could not seem to properly read the "MSIM" bit at the beginning of the standard
mechsim topology file, (MegaPOV gave me the message: "Parse Error: Expected 'float,
vector, or string literal', undeclared identifier 'MSIM' found instead") so I also
replaced the save_file command with my own macro that created a file that used only
floats and vectors. I've included the macros "DoMyLoadFile" and "DoMySaveFile".
When I watch the "Calculating Mechanics Simulation" in the bottom of the window, the
Time always starts at zero.
When I look at the mechsim topology file, it never changes from the original, as if
none of the masses ever really moved.
Thank you again for your help.
Tom Bates
--
#macro T(B)#local m=mod(B,8);#local B=floor(B/8);m#end#local C=126981491245202;#
local D=115694168992822;sphere_sweep{b_spline 16#local i=0;#while(i<16)<T(C)-4,T
(D)-4,10-i/10>.1#local i=i+1;#end pigment{rgb 1}}light_source{-10,1} //Tom Bates
---------- Excerpts from Test1.pov -------------
#version unofficial megapov 1.0;
#include "mechsim.inc"
#declare fn_Env = function { y }
// ...
#macro DoMyLoadFile(FileName)
#fopen LoadFile FileName read
#read (LoadFile, MSIM_ID, MSIM_Version, MSIM_Time) // <<-- I have to do
something with this, but what?
#read (LoadFile, NMasses, NConnections, NFaces)
#local i=0;
#while (i<NMasses)
#read (LoadFile, MPos, MVel, MRad, MMass)
mass { MPos, MVel, MRad mass MMass}
#local i=i+1;
#end
#local i=0;
#while (i<NConnections)
#read (LoadFile, MMass1, MMass2, MStiff, MDamp, MLength)
#if (frame_number=3)
#if (i=cMainEnd + 12 + 0) #local MLength = 2.5-2*0.3; #end
#if (i=cMainEnd + 12 + 1) #local MLength = 2.5-2*0.3; #end
// ...
#end
connection { MMass1, MMass2 stiffness MStiff damping MDamp length MLength}
#local i=i+1;
#end
#local i=0;
#while (i<NFaces)
#read (LoadFile, MMass1, MMass2, MMass3)
face { MMass1, MMass2, MMass3 }
#local i=i+1;
#end
#fclose LoadFile
#end
#macro DoMySaveFile(FileName)
#fopen SaveFile FileName write
#write (SaveFile, "42, 0,\n0,\n") // <<-- I have to fix this, but how?
#write (SaveFile, mechsim:mass_count,",\n")
#write (SaveFile, mechsim:connection_count,",\n")
#write (SaveFile, mechsim:face_count,",\n")
#local i=0;
#while (i<mechsim:mass_count)
#write (SaveFile, mechsim:mass(i):position,",",
mechsim:mass(i):velocity,",",
mechsim:mass(i):radius,",",
mechsim:mass(i):mass,",\n")
#local i=i+1;
#end
#local i=0;
#while (i<mechsim:connection_count)
#write (SaveFile, mechsim:connection(i):index1,",",
mechsim:connection(i):index2,",",
mechsim:connection(i):stiffness,",",
mechsim:connection(i):damping,",",
mechsim:connection(i):length,",\n")
#local i=i+1;
#end
#local i=0;
#while (i<mechsim:face_count)
#write (SaveFile, mechsim:face(i):index1,",",
mechsim:face(i):index2,",",
mechsim:face(i):index3,",\n")
#local i=i+1;
#end
#fclose SaveFile
#end
global_settings {
assumed_gamma 1.0
max_trace_level 15
mechsim {
// Most of these settings were what I copied out of one of the samples.
gravity <0, -9.81, 0>
method 2
environment {
function { fn_Env(x, y, z) }
stiffness 240000
damping 35000
friction 0.2, 1.001
}
collision {
2, 2
stiffness 180000
damping 30000 //5000
friction 0.2, 1.001
}
#if (clock_on)
step_count 500
time_step (1/24)/500
topology {
#local cMainEnd = 1257;
// load_file "test1.dat"
DoMyLoadFile("test1.dat")
// save_file "test1.dat" 3
DoMySaveFile("test1.dat")
}
#else
step_count 0
topology {
#local mFRUStart = mechsim:mass_count;
Bone(TransFRU)
#local mFRUEnd = mechsim:mass_count;
#local mFRLStart = mechsim:mass_count;
Bone(TransFRL)
#local mFRLEnd = mechsim:mass_count;
#local mFLUStart = mechsim:mass_count;
Bone(TransFLU)
#local mFLUEnd = mechsim:mass_count;
#local mFLLStart = mechsim:mass_count;
Bone(TransFLL)
#local mFLLEnd = mechsim:mass_count;
#local mBRUStart = mechsim:mass_count;
Bone(TransBRU)
#local mBRUEnd = mechsim:mass_count;
#local mBRLStart = mechsim:mass_count;
Bone(TransBRL)
#local mBRLEnd = mechsim:mass_count;
#local mBRFStart = mechsim:mass_count;
Bone(TransBRF)
#local mBRFEnd = mechsim:mass_count;
#local mBLUStart = mechsim:mass_count;
Bone(TransBLU)
#local mBLUEnd = mechsim:mass_count;
#local mBLLStart = mechsim:mass_count;
Bone(TransBLL)
#local mBLLEnd = mechsim:mass_count;
#local mBLFStart = mechsim:mass_count;
Bone(TransBLF)
#local mBLFEnd = mechsim:mass_count;
#local mMainStart = mechsim:mass_count;
MechSim_Generate_Grid_Std( 0, 0.1, Dense, Stiff, Damp,
Faces, <1,1,1>, <5,2,9>, TransMain, 3 )
#local mMainEnd = mechsim:mass_count;
#local cMainEnd = mechsim:connection_count;
#debug concat("#local cMainEnd = ",str(cMainEnd,0,0),";\n")
Heel(mFRUEnd, mFRLStart, 0.3)
Heel(mFLUEnd, mFLLStart, 0.3)
Knee(mBRUEnd, mBRLStart, 0.7)
Heel(mBRLEnd, mBRFStart, 0.9)
Knee(mBLUEnd, mBLLStart, 0.7)
Heel(mBLLEnd, mBLFStart, 0.9)
Shoulder(mMainStart+0,mFRUStart,0.6)
Shoulder(mMainStart+3,mFLUStart,0.6)
HipJoint(mMainEnd -3,mBRUStart,0.8)
HipJoint(mMainEnd -0,mBLUStart,0.8)
// save_file "test1.dat" 3
DoMySaveFile("test1.dat")
}
#end
}
}
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