Tutorial: Map Generator - Randomness - Revision history

Maikel: /* Exercise: Sky Islands */

2011-10-05T14:31:09Z

Exercise: Sky Islands

← Older revision		Revision as of 14:31, 5 October 2011
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	turbulence=100; lambda=2;		turbulence=100; lambda=2;
	loosebounds=1;		loosebounds=1;
	// Use the rndchecker algorithm for some gold in the earth.		// Use the rndchecker algorithm for some gold, coal and ore in the earth.
	overlay {		overlay {
	mat=Gold; tex=gold;		mat=Gold; tex=gold;

Maikel: /* Exercise */

2011-01-23T19:26:55Z

Exercise

← Older revision		Revision as of 19:26, 23 January 2011
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	So we took the map generator code from the previous exercise and replaced the bozo algorithm with rndchecker algorithm. The parameter <code>a</code> determines the chance a box is placed, where higher <code>a</code> means a lower chance. Zoom was used to stretch the golden specks in the horizontal direction a little, and some turbulence was applied to obtain random shapes. So we observe that the rndchecker algorithm combined with zoom and turbulence provides a nice tool to create in-earth resources.		So we took the map generator code from the previous exercise and replaced the bozo algorithm with rndchecker algorithm. The parameter <code>a</code> determines the chance a box is placed, where higher <code>a</code> means a lower chance. Zoom was used to stretch the golden specks in the horizontal direction a little, and some turbulence was applied to obtain random shapes. So we observe that the rndchecker algorithm combined with zoom and turbulence provides a nice tool to create in-earth resources.

	==Exercise==		==Exercise: Sky Islands==

	[[File:MapGenerator_ExerciseSkyIslands.png\|200px\|thumb\|right\|Exercise: Create a something looking like this landscape.]]		[[File:MapGenerator_ExerciseSkyIslands.png\|200px\|thumb\|right\|Exercise: Create a something looking like this landscape.]]

Maikel: /* Exercise */

2011-01-23T19:09:08Z

Exercise

@@ Line 58: / Line 58: @@
 ==Exercise==
-[TODO: Exercise where underground materials must be created.]
+[[File:MapGenerator_ExerciseSkyIslands.png|200px|thumb|right|Exercise: Create a something looking like this landscape.]]
 ==Summary==

Maikel: /* Summary */

2011-01-23T14:13:22Z

Summary

← Older revision		Revision as of 14:13, 23 January 2011
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	==Summary==		==Summary==
	~~[TODO: Summarize]~~

	~~The next~~ part of this ~~tutorial about~~ some special features is [[Tutorial: Map Generator - Special Features\|'''~~here~~''']].		So you learned how to apply turbulence and to use random algorithms. Together with the things learned in part one and two, this allows you to create complete landscapes. However there are still some interesting special features of the map generator that need to be discussed, this is done in the next [[Tutorial: Map Generator - Special Features\|'''part''']].

	[[Category:Map Generator Tutorials]]		[[Category:Map Generator Tutorials]]

Maikel: /* Random Checker */

2011-01-23T13:02:26Z

Random Checker

← Older revision		Revision as of 13:02, 23 January 2011
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	};		};
	So we took the map generator code from the previous exercise and replaced the bozo algorithm with rndchecker algorithm. The parameter <code>a</code> determines the chance a box is placed, where higher <code>a</code> means a lower chance. Zoom was used to stretch the golden specks in the horizontal direction a little, and some turbulence was applied to obtain random shapes. So we observe that the rndchecker algorithm combined with zoom and turbulence provides a nice tool to create in-earth resources.		So we took the map generator code from the previous exercise and replaced the bozo algorithm with rndchecker algorithm. The parameter <code>a</code> determines the chance a box is placed, where higher <code>a</code> means a lower chance. Zoom was used to stretch the golden specks in the horizontal direction a little, and some turbulence was applied to obtain random shapes. So we observe that the rndchecker algorithm combined with zoom and turbulence provides a nice tool to create in-earth resources.

	~~[TODO: Explain rndchecker algorithm]~~

	==Exercise==		==Exercise==

Maikel: /* Random Boxes */

2011-01-23T12:55:51Z

Random Boxes

@@ Line 34: / Line 34: @@
 In this example we see that quite a few golden points are drawn in the water. On top of this some rock points are drawn. As expected a lot less rock points were drawn, cause <code>a</code> is higher in that overlay. Note that zoom transformations do not have any effect on the point size of this algorithm. As a side effect the other transformations won't have an effect either because points are the smallest quantity the map generator works on.
-==Random Boxes==
+==Random Checker==
 [TODO: Explain rndchecker algorithm]

Maikel: /* Random Points */

2011-01-23T11:29:19Z

Random Points

← Older revision		Revision as of 11:29, 23 January 2011
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	==Random Points==		==Random Points==

	[[File:MapGenerator_ExampleRandomPoints.png\|200px\|thumb\|right\|~~Everywhere gold~~ and rock.]]		[[File:MapGenerator_ExampleRandomPoints.png\|200px\|thumb\|right\|Gold and rock everywhere.]]
	Random behaviour in the map generator can also be induced through the use of algorithms, the random algorithm is one of these. It draws random points, the parameter <code>a</code> determines the likelihood a point is being drawn. A point is less likely drawn if <code>a</code> is increased.		Random behaviour in the map generator can also be induced through the use of algorithms, the random algorithm is one of these. It draws random points, the parameter <code>a</code> determines the likelihood a point is being drawn. A point is less likely drawn if <code>a</code> is increased.
	// Random gold and rock points.		// Random gold and rock points.

Maikel: /* Random Points */

2011-01-22T17:34:54Z

Random Points

← Older revision		Revision as of 17:34, 22 January 2011
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	};		};
	};		};
	In this example we see that quite a few golden points are drawn in the water. On top of this some rock points are drawn.		In this example we see that quite a few golden points are drawn in the water. On top of this some rock points are drawn. As expected a lot less rock points were drawn, cause <code>a</code> is higher in that overlay. Note that zoom transformations do not have any effect on the point size of this algorithm. As a side effect the other transformations won't have an effect either because points are the smallest quantity the map generator works on.
	~~[TODO: Expand explanation~~ a ~~little]~~

	==Random Boxes==		==Random Boxes==

Maikel at 17:21, 22 January 2011

2011-01-22T17:21:38Z

← Older revision		Revision as of 17:21, 22 January 2011
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	[[File:MapGenerator_ExampleTurbulentLines.png\|200px\|thumb\|right\|Straight lines deformed randomly!]]		[[File:MapGenerator_ExampleTurbulentLines.png\|200px\|thumb\|right\|Straight lines deformed randomly!]]
	So let's start with introducing turbulence. For this purpose a new algorithm is introduced, the lines algorithm. It draws vertical lines where the parameter <code>a</code> determines the line width and <code>b</code> the distance between the lines. Therefore <code>b</code> must always be chosen larger than <code>a</code>, otherwise the whole overlay will be filled completely. Furthermore we will introduce two new attributes which together specify the turbulence transformation. First there is the <code>turbulence</code> attribute - which takes the values 10, 100, 1000 and 10000 - specifying the amount of deformation of the layer. Second the <code>lambda</code> attribute can be used to repeat the deformation process up to 20 times. So now let's take a look at this piece of map generator code and the result.		So let's start with introducing turbulence. For this purpose a new algorithm is introduced, the lines algorithm. It draws straight vertical lines where the parameter <code>a</code> determines the line width and <code>b</code> the distance between the lines. Therefore <code>b</code> must always be chosen larger than <code>a</code>, otherwise the whole overlay will be filled completely. Furthermore we will introduce two new attributes which together specify the turbulence transformation. First there is the <code>turbulence</code> attribute - which takes the values 10, 100, 1000 and 10000 - specifying the amount of deformation of the layer. Second the <code>lambda</code> attribute can be used to repeat the deformation process up to 20 times. So now let's take a look at this piece of map generator code and the result.
	// Straight lines made interesting.		// Straight lines made interesting.
	map ExampleTurbulentLines {		map ExampleTurbulentLines {
Line 18:		Line 18:
	==Random Points==		==Random Points==

	[~~TODO~~: ~~Explain~~ random algorithm]		[[File:MapGenerator_ExampleRandomPoints.png\|200px\|thumb\|right\|Everywhere gold and rock.]]
			Random behaviour in the map generator can also be induced through the use of algorithms, the random algorithm is one of these. It draws random points, the parameter <code>a</code> determines the likelihood a point is being drawn. A point is less likely drawn if <code>a</code> is increased.
			// Random gold and rock points.
			map ExampleRandomPoints {
			mat=Water; tex=water;
			overlay {
			algo=random; a=10;
			mat=Gold; tex=gold;
			};
			overlay {
			algo=random; a=30;
			mat=Rock; tex=rock;
			};
			};
			In this example we see that quite a few golden points are drawn in the water. On top of this some rock points are drawn.
			[TODO: Expand explanation a little]

	==Random Boxes==		==Random Boxes==

Maikel at 16:24, 22 January 2011

2011-01-22T16:24:40Z

← Older revision		Revision as of 16:24, 22 January 2011
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	You will have noticed that the straight golden lines of the algorithm are deformed quite smoothly by the applied turbulence. Turbulence uses a sine function to shift randomly shift the points of a layer, which transforms regular shapes into disordered and curved ones. Now try larger values for the <code>turbulence</code> and <code>lambda</code> attributes and observe there effects. Turbulence is a crucial attribute and you will need it in almost any dynamic map you design.		You will have noticed that the straight golden lines of the algorithm are deformed quite smoothly by the applied turbulence. Turbulence uses a sine function to shift randomly shift the points of a layer, which transforms regular shapes into disordered and curved ones. Now try larger values for the <code>turbulence</code> and <code>lambda</code> attributes and observe there effects. Turbulence is a crucial attribute and you will need it in almost any dynamic map you design.

	==~~Example 2~~==		==Random Points==

			[TODO: Explain random algorithm]

	==~~Example 3~~==		==Random Boxes==

			[TODO: Explain rndchecker algorithm]

	==Exercise==		==Exercise==

			[TODO: Exercise where underground materials must be created.]

	==Summary==		==Summary==