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From: Carlos López González <genet...@gmail.com>
Date: 2014-03-31 17:08 GMT+02:00
Subject: Value Node from File
To: "synfig-devl@lists.sourceforge.net" <synfig-devl@lists.sourceforge.net>


Hi!
I'm going to start developing a new convert type that would allow to read
the values for a parameter or value node from a text file.
I want to make it the simplest way possible so I've narrowed the format of
the file and the supported types to this:

Supported types: bool, integer, real, angle, time, vector, color, string.
File format:
A line with the frame rate (like the lst file):
FPS 24
Another line with the type of the data (one of these):
TYPE REAL
TYPE BOOL
TYPE INTEGER
TYPE ANGLE
TYPE TIME
TYPE VECTOR
TYPE COLOR
TYPE STRING

and several lines with the entry:
FRAME VALUE

where VALUE can be:
REAL (for Real, Time and Angle)
0 or 1 (for bool)
INTEGER (for integer)
REAL REAL (for vector)
REAL REAL REAL [REAL] (for color, interpreted as RGB[A] alpha optional)
STRING (a group of words until the end of line for strings)

Attached is a dummy file for example for each type.

Internally it would create an Animated Value Node the first time the data
is read from the file. The interpolation used for the waypoints of the
Animated Value Node would be a subparameter of the Convert type. Also a
Offset time would be available as subparameter to shift the animation to
other different time.

I would like to know other's opinion or suggestions before start to code.

-- 
Carlos
http://synfig.org



-- 
Carlos
http://synfig.org
# Lines starting with # are ignored
FPS 25

TYPE REAL
#TYPE BOOL
#TYPE INTEGER
#TYPE ANGLE
#TYPE TIME
#TYPE VECTOR
#TYPE COLOR
#TYPE STRING

#INTERPOLATION CONSTANT
#INTERPOLATION TCB
#INTERPOLATION LINEAR
#INTERPOLATION EASE
INTERPOLATION CLAMPED

# FORMAT (tabulation or space separated):
# FRAME VALUE VALUE
# 

## REAL, TIME or ANGLE
0 0.3456
12 4.023
20 -0.78454

## BOOL
0 1
12 0
20 0

## INTEGER
0 34
12 2
20 -4

## VECTOR (X, Y)
0 2.564 -3.8709
12 0.000 3.567
20 0.125 6.0342

# COLOR (R, G, B, [A])
0 0.564 0.8709 0.3456
12 0.000 3.567 0.7830 1.000
20 0.925 0.0342 0.2314 0.7807

## STRING
0 This is a long string
12 The string goes from the FPS to the end of line
20 Empty strings are alloed too
35 

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