| Commit message (Collapse) | Author | Age | Files | Lines |
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This doesn't bring reliable results for Graph and also is pretty expensive.
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FloatUtil.EPSILON epsilon and no collinear test
commit 5488665474cc7b88577cedfca6416784f0fda3ba Generalize *seg2segIntersection* w/ epsilon and doCollinear
caused a big performance hit about 1/3 due to added doCollinear case and manual epsilon adding branches
and having the method being longer - probably not 'hotspot'ed.
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toggle OutlineShape's isComplex() for visibility
We may use complex for other criteria than !convex, i.e. self-intersecting etc.
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a zero epsilon value to reduce complexity in upper math layers
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passing FloatUtil.EPSILON to explicit isZero(a, epsilon)
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non-convex treatment to simplify debugging etc
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and non-circulcircle triangulation candidates in our Delaunay tessellator
<https://jogamp.org/bugzilla//show_bug.cgi?id=1501#c6>
The used Delaunay tessellation works well with (almost) convex shapes.
In case e.g. a glyph gets to the extremes like 'M' in FreeMono
or any other complex Chinese symbol - it may just simply happen
that the new non-circumcircle triangle point crosses the inner (hope)
or outer boundaries of the given polygon.
Applying further constraint at Loop.cut() resolves most cases
by rejecting the proposed CCW and non-circumcircle triangle candidate
if its new two line-segments intersects with the original polygon.
This results in mostly proper rendered Chinese fonts and also
FreeMono is now readable - overal remaining bugs in Glyphs is low.
+++
Of course, this intersection test is costly around >= O(log(n)*n) costs,
practically adding a measured ~65% processing time.
E.g. for FontView01 using FreeSerif.ttf
- orig total took 1430.817638ms, per-glyph 0.2236ms, glyphs 6399
- fix total took 2377.337359ms, per-glyph 0.371517ms, glyphs 6399
Pure Glyph/Shape instantiation shows > 2x costs:
750 ms 100% convex (fake)
1875 ms 0% convex (fake)
1870 ms 13% convex 824/6399
+++
Hence it is desired to either
(1) Manually mark a polygon non-convex to add described intersection test for accuracy.
Also may be used to just drop the additional costs despite the lack of correctness.
PROVIDED
(2) Determine non-convex nature of a polygon with a and overall less expensive algorithm.
If considerably cheaper, this could reduce O(log(n) * n) -> O(n) or even O(log n).
Added convex/non-convex classification while ignoring off-curve points,
but only ~13% of FreeSerif is pure convex,
hence there is no benefit with this classification type.
It might be desired to attempt other classes, i.e.
being rendered in non-convex mode w/o intersection tests.
See
- GENERALIZED DELAUNAY TRIANGULATIONS OF NON-CONVEX DOMAINS
https://deepblue.lib.umich.edu/bitstream/handle/2027.42/28782/0000614.pdf;sequence=1
- https://en.wikipedia.org/wiki/List_of_self-intersecting_polygons
- https://en.wikipedia.org/wiki/Complex_polygon
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new impl; Add isConvex*() to determine whether a polyline is convex
I had problems using the previous line2line intersection methods in my (and my son's) C++ gfxbox2 project, e.g. freefall01.
Hence I found a different solution, also using less operations:
<https://jausoft.com/cgit/cs_class/gfxbox2.git/tree/include/pixel/pixel2f.hpp#n660>
While adding intersection tests for our Delaunay (Bug 1501) .. I came across this issue again
and hence swapped the implementation.
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VBORegionSPES2 to just render lines instead of the filled area -> Used in UIShapeDemo02a
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setHintMask()->setHintBits(), clearHintMask()->clearHintBits()
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*2d() variants
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winding direction (outer-bondary TTF CW (Graph CCW) and inner-hole TTF CCW (Graph CW)
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inner-hole:=CW w/o using winding determination (might be incorrect)
This simplifies our code further and it has been validated that our polygon shoelace-algo for area >= 0 ? CCW
doesn't produce correct results with all curves.
Hence rely on given winding depending on outer-boundary and inner-hole if CDTriangulator2D.FixedWindingRule == true (default and fixed).
This also removes the more costly winding shoelace calculus,
hence Outline ctor only sets dirtyWinding:=true w/o calculating the winding.
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version, overcome float precision; Loop: Pass edgeType not Winding, simplify findClosestValidNeighbor() -> isValidNeighbor(); CDTriangulator2D.addCurve() enforces Winding.CCW on BOUNDARY null == loop case
Add double version of triAreaVec2() and isInCircleVec2() in VectorUtil, overcoming float precision limits
- Analysis exposed float precision limits within isInCircleVec2()
Loop: Pass edgeType not Winding, simplify findClosestValidNeighbor() -> isValidNeighbor()
- Enhance code clarity
CDTriangulator2D.addCurve() enforces Winding.CCW on BOUNDARY null == loop case
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requires pause state (normal at play-state)
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and subtitle language
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0e5e38478a6197b2dc65960c55bc831d6b4796a7 Sun Feb 12 00:54:40 2023 +0100
d18df847b17a89fdc4b47fa9cfe010af1a61690b Sat Mar 1 16:48:48 2014 +0100
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Adding missing LongDateTime class
haumacher https://github.com/haumacher/typecast
https://jogamp.org/cgit/typecast.git/log/?h=jogl_patches
Status:
- Compile clean
- Graph/GraphUI Bring-Up OK
- Fixes CJK ttf font parsing due to fixed Cmap table
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(pre-write-feature)
Bernhard Haumacher provided changes in May 2020 to the typecast project within his public branch https://github.com/haumacher/typecast
This merges the pre-write-feature work, which probably is incomplete.
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src/jogl/classes/jogamp/graph/font/typecast/ot/TTFont.java # src/jogl/classes/jogamp/graph/font/typecast/ot/table/Table.java
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* Include the offset table in the font's dump.
* Simplified reading since the offset table now does not be read twice.
# Conflicts:
# src/jogl/classes/jogamp/graph/font/typecast/ot/OTFont.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/TTFont.java
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* Completed missing toString() functions in some table.
* Added dump() functionality to create a human readable description of
all font tables with complete detail.
* Fixed some signed/unsigned problems in the parser.
# Conflicts:
# src/jogl/classes/jogamp/graph/font/typecast/ot/OTFont.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/TTFont.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/GlyfCompositeDescript.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/GlyfDescript.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/NameTable.java
# src/test/java/net/java/dev/typecast/ot/TTFontTest.java
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* Added documentation to fields in `HeadTable` taken from
https://docs.microsoft.com/en-us/typography/opentype/spec/head.
* Added `LongDateTime` conversion of date values encoded as "seconds
since 1904".
* Added `getType()` API to `Table` interface.
# Conflicts:
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/HdmxTable.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/HeadTable.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/LocaTable.java
# src/jogl/classes/jogamp/graph/font/typecast/ot/table/SbixTable.java
Original commit from typecast merge:
From 43c20bb2e7644aef7002caeb93e1770be5cacaab Mon Sep 17 00:00:00 2001
From: Bernhard Haumacher <[email protected]>
Date: Sat, 9 May 2020 12:49:39 +0200
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{get,set}FallbackFont() + Font.getBestCoverage(..); Use fallback-font in MediaButton in case chosen font doesn't match (foreign languages, e.g. 'zho' Chinese .. )
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select font for ASS/Text rendering; Remove GLMediaPlayer's getStreamLang() as replaced by getLang()
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copy-ctor in com.jogamp.graph.* and com.jogamp.math.*
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