How do you find glider synthesis?

[Nicbudd77]

How do people get glider synthesis? Do they use programs, or just collide gliders in random ways? I mean is there a program that I could use or a website that makes glider synthesis?

[OHAD]

Sadly, I don't know the answer to that question, but I can add another question-

What is the important purpose of building patterns with glider synthesis?
I know that if you can find the glider combination, you can also build a gun/factory of that pattern. But, are there more important things that can be achieved with this?
Personally, I find it more interesting to create known patterns with uni-dimensional parents (starts with a bounding box of N*1). Sadly, I can't find enough of those, and my important question is- Can you build every existing pattern with other one-cell-thick patterns?

[137ben]

How do people get glider synthesis? Do they use programs, or just collide gliders in random ways? I mean is there a program that I could use or a website that makes glider synthesis?

For small patterns, they are usually found by running a program with collides gliders in random ways.
For large, complex patterns, they are engineered in stages, with each component being synthesized separately (possibly running searches to synthesize the pieces.)

[wwei23]

Usually I build up from blocks. I tend to stick with two-glider collisions, and collisions between glider and object. What I can't do is add a glider to an active region. Why? So I can trace backwards. For glider and glider, either I make blocks, or I make nothing. For example, I will demonstrate a ship.
This is a ship:

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x = 3, y = 3, rule = B3/S23
2o$obo$b2o!

It can be made by colliding a glider with a pond:

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x = 8, y = 8, rule = B3/S23
6bo$5bo$5b3o2$b2o$o2bo$o2bo$b2o!

This collision produces plenty of sparks:

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x = 8, y = 6, rule = B3/S23
bo$2bo$3o$5b3o$5bo$6bo!

To make a beehive into a pond:

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x = 5, y = 8, rule = B3/S23
3bo$4bo$bo$2bo2$b2o$o2bo$b2o!

To get the sparks, I use said collision to get those sparks:

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x = 8, y = 9, rule = B3/S23
bo$2bo$3o$5b3o$5bo$6bo$2b2o$bo2bo$2b2o!

To make block into beehive:

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x = 4, y = 7, rule = B3/S23
2bo$3bo$o$bo2$2o$2o!

To get the sparks, I use said collision to get those sparks:

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x = 8, y = 8, rule = B3/S23
bo$2bo$3o$5b3o$5bo$6bo$2b2o$2b2o!

To build the block, I can use any of these:

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x = 266, y = 281, rule = B3/S23
83bo15bo39bo$obo4bo7bobo4bobo3bo3bo28bo20bo15bo39bo$60bo21b3o13b3o15bo
21b3o17bo$o3bo2bo6bo3bo2bo3bo2bo2bo28b3o52bo41bo$115b3o39b3o$obo4bo6bo
3bo2bo6bobo2$o3bo2bo6bo3bo2bo3bo2bo2bo2$obo4bobobo3bobo4bobo3bo3bo85b
3o$53b3o62bo17b2o16bo$55bo21b2o15b2o23bo16bobo14b2o$54bo23b2o15b2o39bo
16bobo$77bo16bo78$226bo6bobo3bo5bo18bo$263bo$226bo5bo3bo2bobobobo17b3o
2$226bo5bo3bo2bo2bo2bo2$226bo5bo3bo2bo5bo2$226bobobo2bobo3bo5bo$262bo$
261b2o$261bobo109$bobo5bo7bobo4bo7bobo4bobo3bo3bo2$bo3bo3bo7bo3bo2bo6b
o3bo2bo3bo2bo2bo28bo$76bo$bobo5bo2bobo2bobo4bo6bo3bo2bo6bobo28b3o2$bo
3bo3bo7bo3bo2bo6bo3bo2bo3bo2bo2bo2$bobo5bo7bobo4bobobo3bobo4bobo3bo3bo
2$76b3o$76bo$77bo45$68bo$67bo$67b3o34bo$2bo5bo3bo3bobo4bobo77bo$103b3o
$2bobobobo3bo2bo6bo3bo2$2bo2bo2bo3bo3bobo3bo2$2bo5bo3bo6bo2bo3bo$71b2o
17b3o$2bo5bo3bo3bobo4bobo45bobo18bo$71bo19bo!

Sparks:

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x = 378, y = 35, rule = B3/S23
153bo36bo18bo$57bo18bo19bo16bo19bo18bo19bo16bo18bo36bo$56bo18bo19bo16b
o19bo19b3o16bo17b3o16b3o15bo17bo$56b3o16b3o17b3o14b3o17b3o36b3o51bo18b
3o$225b3o4$189bo$57b3o17b3o89bo18b2o55bo$57bo19bo20bo17bo20bo13b2o15b
2o18bobo14b2o20bo16b2o$58bo19bo18b2o16b2o19b2o13bobo14bobo34bobo18b2o
16bobo$97bobo15bobo18bobo12bo53bo20bobo$o4bo3bobo3bobobo2bo3bo3bo3bo4b
o4bobo2$obo2bo2bo3bo4bo4bo3bo3bo3bobo2bo2bo2$o2bobo2bo3bo4bo4bobobo3bo
3bo2bobo2bo2bobo2$o4bo2bo3bo4bo4bo3bo3bo3bo4bo2bo4bo266bo$268bo22bo21b
o62bo$o4bo3bobo5bo4bo3bo3bo3bo4bo4bobo182bo15bo21bo22bo22b3o18bo22bo
17bo$228bo15bo22b3o20b3o40bo22bo18b3o$85bo16bo17bo16bo16bo15bo17bo16bo
22b3o13b3o86b3o20b3o$65bo18bo16bo17bo16bo16bo15bo17bo16bo$64bo19b3o14b
3o15b3o14b3o14b3o13b3o15b3o14b3o$64b3o4$223b3o15b3o59b2o$75b3o16b3o16b
3o15b3o15b3o14b3o16b3o15b3o19bo17bo11b2o23b2o20bobo20b2o40b2o$53b3o21b
o18bo18bo17bo17bo16bo18bo17bo18bo17bo13b2o23b2o21bo21b2o12b2o26b2o$55b
o20bo18bo18bo17bo17bo16bo18bo17bo50bo24bo44bo15b2o24bo$54bo285bo!

Basically, I break it up into microscopic steps. And that's it! By colliding gliders into new objects, more new ones are discovered. The sparks bring this further. That's how I do it.