- #How to outline an irregular polygon java lwjgl how to#
- #How to outline an irregular polygon java lwjgl code#
For this area list to be meaningful, the input length units must be known. For each polygon, a list of area results is computed using a fixed set of common area units (feet 2, meters 2, etc.).First, an explanation of the relationship between the "Length Units" selection and the results display:.Notice about polar coordinates that the origin is implicit and preset at x = 0, y = 0.As before, this example will work if pasted into the computer's data entry area and the polar mode selected.Unlike the prior Cartesian form, these coordinates are cumulative - each new vector adds to the present position.The angles follow the compass convention - 0 degrees is up or "north", 90 degrees is to the right or "east" (Figure 2).Each coordinate consists of a distance and an angle in degrees (a polar vector).The only limitation is that explanatory comments can't contain numbers.The parser is robust enough that the above example can be pasted into the computer's data entry area and it will work (try it).The commas in the above example are only meant to group the data pairs for the reader - they have no significance to the area computer's data parser.For example, older land surveys (before the era of cheap computer power) regularly fail this test. For applications using field data consisting of length vectors that are subsequently converted to Cartesian form, it's a good idea to compare the beginning and ending Cartesian coordinates - they should be equal. Again, for an accurate area calculation, the described polygon should be a closed figure - the last coordinate should equal the first.The conversion from polar to Cartesian coordinates is trivial, but it's important to keep this requirement in mind. Many applications of this method use original data sources consisting of polar vectors (an example is land survey legal descriptions), but this method requires Cartesian coordinates.It's this property of the method that subtracts the area of inflections from a complex figure as in Figure 1 - the "inflections" represent a counterclockwise traversal within the polygon.
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#How to outline an irregular polygon java lwjgl how to#
I do not have any idea how to determine the next point for the connecting line, so that it does not cut any other line.įurther, the last point must close the polygon.
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Return Math.floor(Math.random() * (max - min + 1)) + min
#How to outline an irregular polygon java lwjgl code#
Here is an intial code which only draws a complex polygon (lines intersect): var ctx = document.getElementById('drawpolygon').getContext('2d') The number of sides should be defined by the user, n>3. I am trying to find an algorithm of how to draw a simple (no lines are allowed to intersect), irregular polygon.