Sozi json is not stable over load/save iterations induce presentations defect after several cycles. #688
Comments
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A little example in two step Which gives the following second frame: And then I add an object (a spiral), which gives the following svg : Which leads after automatic reload to the following test.sozi.json: And this second frame: The svg diff is: diff --git a/test.svg b/test.svg
index 3371f27..3963354 100644
--- a/test.svg
+++ b/test.svg
@@ -25,7 +25,7 @@
inkscape:document-units="px"
inkscape:zoom="4.966441"
inkscape:cx="120.81086"
- inkscape:cy="129.06627"
+ inkscape:cy="129.16694"
inkscape:window-width="1920"
inkscape:window-height="1034"
inkscape:window-x="0"
@@ -81,4 +81,17 @@
cy="96.971519"
r="4.9238281" />
</g>
+ <path
+ sodipodi:type="spiral"
+ style="fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linej>
+ id="path2"
+ sodipodi:cx="29.607037"
+ sodipodi:cy="70.048569"
+ sodipodi:expansion="1"
+ sodipodi:revolution="3"
+ sodipodi:radius="11.523953"
+ sodipodi:argument="-18.325956"
+ sodipodi:t0="0"
+ d="m 29.607037,70.048569 c 0.500383,0.288896 -0.142556,0.817037 -0.480166,0.831669 -0.914901,0.0396>
+ transform="translate(2.5327064,1.8754908)" />
</svg>
But the json diff is: diff --git a/test.sozi.json b/test.sozi.json
index e3fdd70..14cc6db 100644
--- a/test.sozi.json
+++ b/test.sozi.json
@@ -60,7 +60,7 @@
},
"__sozi_auto__": {
"link": false,
- "referenceElementId": "",
+ "referenceElementId": "path2",
"outlineElementId": "",
"transitionTimingFunction": "linear",
"transitionRelativeZoom": 0,
@@ -84,8 +84,8 @@
"text2": {
"cx": 40.40368962287903,
"cy": 76.95401000976562,
- "width": 86.48829650878906,
- "height": 49.88267517089844,
+ "width": 52.18732332746864,
+ "height": 8.05282031871704,
"opacity": 1,
"angle": 0,
"clipped": false,
@@ -132,8 +132,8 @@
"text2": {
"deltaX": -36.785534620285034,
"deltaY": -5.417633056640625,
- "widthFactor": 86.48829650878906,
- "heightFactor": 49.88267517089844,
+ "widthFactor": 52.18732332746864,
+ "heightFactor": 8.05282031871704,
"deltaAngle": 0
},
"yellow": {
@@ -142,6 +142,13 @@
"widthFactor": 8.782627491570807,
"heightFactor": 6.584591792163595,
"deltaAngle": 0
+ },
+ "__sozi_auto__": {
+ "deltaX": 7.308123826980591,
+ "deltaY": 5.985389709472656,
+ "widthFactor": 4.22710493293324,
+ "heightFactor": 2.689211458086764,
+ "deltaAngle": 0
}
}
},
@@ -193,7 +200,7 @@
"layer1": {
"cx": 77.17973619701569,
"cy": 82.54889413239681,
- "width": 1.470531069364162,
+ "width": 1.4705310693641622,
"height": 1.1025,
"opacity": 1,
"angle": 0,
@@ -206,8 +213,8 @@
"text2": {
"cx": 77.17973619701569,
"cy": 82.54889413239681,
- "width": 1.470531069364162,
- "height": 1.1025,
+ "width": 1,
+ "height": 1,
"opacity": 1,
"angle": 0,
"clipped": false,
@@ -232,8 +239,8 @@
"__sozi_auto__": {
"cx": 77.17973619701569,
"cy": 82.54889413239681,
- "width": 1.470531069364162,
- "height": 1.1025,
+ "width": 1,
+ "height": 1,
"opacity": 1,
"angle": 0,
"clipped": false,
@@ -254,8 +261,8 @@
"text2": {
"deltaX": -0.009488046148376839,
"deltaY": 0.17725106599056062,
- "widthFactor": 1.470531069364162,
- "heightFactor": 1.1025,
+ "widthFactor": 1,
+ "heightFactor": 1,
"deltaAngle": 0
},
"yellow": {
@@ -268,8 +275,8 @@
"__sozi_auto__": {
"deltaX": -0.009488046148376839,
"deltaY": 0.17725106599056062,
- "widthFactor": 1.470531069364162,
- "heightFactor": 1.1025,
+ "widthFactor": 1,
+ "heightFactor": 1,
"deltaAngle": 0
}
}
@@ -311,7 +318,7 @@
},
"__sozi_auto__": {
"link": false,
- "referenceElementId": "text1",
+ "referenceElementId": "path2",
"outlineElementId": "",
"transitionTimingFunction": "linear",
"transitionRelativeZoom": 0,
@@ -335,8 +342,8 @@
"text2": {
"cx": 40.778503475571526,
"cy": 64.39774594456773,
- "width": 86.48829650878908,
- "height": 64.84279651579853,
+ "width": 52.18732332746865,
+ "height": 10.467910702782225,
"opacity": 1,
"angle": 0,
"clipped": false,
@@ -346,7 +353,7 @@
"clipHeightFactor": 1
},
"yellow": {
- "cx": -1.4483764830473769,
+ "cx": -1.448376483047376,
"cy": 123.8143148248886,
"width": 140.880321462301,
"height": 105.62208282980747,
@@ -383,8 +390,8 @@
"text2": {
"deltaX": -36.41072076759254,
"deltaY": -17.97389712183852,
- "widthFactor": 86.48829650878908,
- "heightFactor": 64.84279651579853,
+ "widthFactor": 52.18732332746865,
+ "heightFactor": 10.467910702782225,
"deltaAngle": 0
},
"yellow": {
@@ -395,10 +402,10 @@
"deltaAngle": 0
},
"__sozi_auto__": {
- "deltaX": 0.37481313743676026,
- "deltaY": -3.2374927028932063,
- "widthFactor": 1.0000000000000002,
- "heightFactor": 2.0752927396695933,
+ "deltaX": 7.682937679673088,
+ "deltaY": -6.570874355725238,
+ "widthFactor": 4.22710493293324,
+ "heightFactor": 3.495722528257764,
"deltaAngle": 0
}
}
@@ -440,7 +447,7 @@
},
"__sozi_auto__": {
"link": false,
- "referenceElementId": "text1",
+ "referenceElementId": "path2",
"outlineElementId": "",
"transitionTimingFunction": "easeInOut",
"transitionRelativeZoom": 0,
@@ -464,8 +471,8 @@
"text2": {
"cx": 32.002828613301865,
"cy": 71.6137976001756,
- "width": 32.59652934576432,
- "height": 24.438568046878558,
+ "width": 19.668853301415776,
+ "height": 3.9452454515323483,
"opacity": 1,
"angle": 0,
"clipped": false,
@@ -475,9 +482,9 @@
"clipHeightFactor": 1
},
"yellow": {
- "cx": -15.743026112544287,
+ "cx": -15.743026112544285,
"cy": 135.5685025932568,
- "width": 53.096311502908826,
+ "width": 53.09631150290883,
"height": 39.80785217769546,
"opacity": 1,
"angle": 0,
@@ -512,8 +519,8 @@
"text2": {
"deltaX": -45.1863956298622,
"deltaY": -10.757845466230648,
- "widthFactor": 32.59652934576432,
- "heightFactor": 24.438568046878558,
+ "widthFactor": 19.668853301415776,
+ "heightFactor": 3.9452454515323483,
"deltaAngle": 0
},
"yellow": {
@@ -524,10 +531,10 @@
"deltaAngle": 0
},
"__sozi_auto__": {
- "deltaX": -8.4008617248329,
- "deltaY": 3.978558952714664,
- "widthFactor": 0.37688948287300134,
- "heightFactor": 0.7821560074641671,
+ "deltaX": -1.0927371825965722,
+ "deltaY": 0.6451772998826328,
+ "widthFactor": 1.5931513922231215,
+ "heightFactor": 1.3175010559425695,
"deltaAngle": 0
}
}
@@ -536,7 +543,7 @@
"elementsToHide": [],
"customFiles": [],
"selectedFrames": [
- "frame2477"
+ "frame6152"
],
"selectedLayers": [
"layer1", |
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Summary of your problem or feature request
Sozi presentation is not stable in the time. Each time you save, some subtle changes appear in the json, I guess due to float rounding error.
After some iterations I have to check all the slide to correct the little (or sometimes big) offset either in the slide position or in the cutting shape.
It is a major drawback for longer presentations.
Version of Sozi and other relevant software
Steps to reproduce the problem
Setup a presentation, save dozens of time and see that some slides are now off their initial position.
Expected behavior
Slide and cut position and dimensions stays stable upon saving over time.
Observed behavior
Some slides or cut get off their initial position, without moving them.
Hints and solutions (optional)
I vote for a float rounding problem, more or less perceptible depending upon the zoom level.
I'll try to make a minimal case to reproduce the problem.
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