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Add split method for linestring and multilinestring geometries. Use for splitting one geometry with another. Optionally performs a mutual split. r=ahocevar (closes #1929)

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@8974 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
Tim Schaub
2009-03-09 22:19:07 +00:00
parent 837efd0b9c
commit a10b319413
5 changed files with 806 additions and 3 deletions
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190
tests/Geometry/MultiLineString.html
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@@ -21,6 +21,196 @@
t.eq( mline.components.length, 1, "mline.components.length is set correctly");
}
function test_split(t) {
var wkt = OpenLayers.Geometry.fromWKT;
var cases = [{
msg: "no intersection",
g1: "MULTILINESTRING((0 0, 0 1), (2 2, 3 3))",
g2: "MULTILINESTRING((1 0, 1 1), (2 2, 3 2))",
exp: null
} , {
msg: "intersection at midpoint",
g1: "MULTILINESTRING((0 0, 1 1))",
g2: "MULTILINESTRING((1 0, 0 1))",
exp: ["MULTILINESTRING((1 0, 0.5 0.5))", "MULTILINESTRING((0.5 0.5, 0 1))"]
}, {
msg: "intersection at midpoint (reverse source/target)",
g1: "MULTILINESTRING((1 0, 0 1))",
g2: "MULTILINESTRING((0 0, 1 1))",
exp: ["MULTILINESTRING((0 0, 0.5 0.5))", "MULTILINESTRING((0.5 0.5, 1 1))"]
}, {
msg: "intersection at endpoint",
g1: "MULTILINESTRING((0 0, 1 1))",
g2: "MULTILINESTRING((1 0, 1 1))",
exp: null
}, {
msg: "midpoint intersection, no options",
g1: "MULTILINESTRING((0 0, 2 2))",
g2: "MULTILINESTRING((0 2, 2 0))",
exp: ["MULTILINESTRING((0 2, 1 1))", "MULTILINESTRING((1 1, 2 0))"]
}, {
msg: "midpoint intersection, edge false",
opt: {edge: false},
g1: "MULTILINESTRING((0 0, 2 2))",
g2: "MULTILINESTRING((0 2, 2 0))",
exp: null
}, {
msg: "midpoint intersection, mutual",
opt: {mutual: true},
g1: "MULTILINESTRING((0 0, 2 2))",
g2: "MULTILINESTRING((0 2, 2 0))",
exp: [["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2))"], ["MULTILINESTRING((0 2, 1 1))", "MULTILINESTRING((1 1, 2 0))"]]
}, {
msg: "close intersection, no tolerance",
g1: "MULTILINESTRING((0 0, 0.9 0.9))",
g2: "MULTILINESTRING((0 2, 2 0))",
exp: null
}, {
msg: "close intersection, within tolerance",
opt: {tolerance: 0.2},
g1: "MULTILINESTRING((0 0, 0.9 0.9))",
g2: "MULTILINESTRING((0 2, 2 0))",
exp: ["MULTILINESTRING((0 2, 0.9 0.9))", "MULTILINESTRING((0.9 0.9, 2 0))"]
}, {
msg: "multi source, single target",
g1: "MULTILINESTRING((0 0, 2 2))",
g2: "LINESTRING(0 2, 2 0)",
exp: ["LINESTRING(0 2, 1 1)", "LINESTRING(1 1, 2 0)"]
}, {
msg: "multi source, single target, mutual split",
opt: {mutual: true},
g1: "MULTILINESTRING((0 0, 2 2))",
g2: "LINESTRING(0 2, 2 0)",
exp: [["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2))"], ["LINESTRING(0 2, 1 1)", "LINESTRING(1 1, 2 0)"]]
}, {
msg: "single source, multi target",
g1: "LINESTRING(0 2, 2 0)",
g2: "MULTILINESTRING((0 0, 2 2))",
exp: ["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2))"]
}, {
msg: "partial target split",
g1: "MULTILINESTRING((2 0, 0 2))",
g2: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
exp: ["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4))"]
}, {
msg: "partial target split, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((2 0, 0 2))",
g2: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
exp: [["MULTILINESTRING((2 0, 1 1))", "MULTILINESTRING((1 1, 0 2))"], ["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4))"]]
}, {
msg: "partial source split, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
g2: "MULTILINESTRING((2 0, 0 2))",
exp: [["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4))"], ["MULTILINESTRING((2 0, 1 1))", "MULTILINESTRING((1 1, 0 2))"]]
}, {
msg: "partial target split with source endpoint",
g1: "MULTILINESTRING((1 0, 1 1))",
g2: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
exp: ["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4))"]
}, {
msg: "partial target split with source endpoint, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((5 5, 6 6), (1 0, 1 1))",
g2: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
exp: [[], ["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4))"]]
}, {
msg: "partial source split with target endpoint",
g1: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4))",
g2: "MULTILINESTRING((1 0, 1 1))",
exp: null
}, {
msg: "partial source split with target endpoint, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((0 0, 2 2), (3 3, 4 4), (5 5, 6 6))",
g2: "MULTILINESTRING((1 0, 1 1))",
exp: [["MULTILINESTRING((0 0, 1 1))", "MULTILINESTRING((1 1, 2 2), (3 3, 4 4), (5 5, 6 6))"], []]
}, {
msg: "partial target and source split",
g1: "MULTILINESTRING((0 5, 2 5), (4 5, 6 5), (8 5, 10 5))",
g2: "MULTILINESTRING((5 0, 5 2), (5 4, 5 6), (5 8, 5 10))",
exp: ["MULTILINESTRING((5 0, 5 2), (5 4, 5 5))", "MULTILINESTRING((5 5, 5 6), (5 8, 5 10))"]
}, {
msg: "partial target and source split, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((0 5, 2 5), (4 5, 6 5), (8 5, 10 5))",
g2: "MULTILINESTRING((5 0, 5 2), (5 4, 5 6), (5 8, 5 10))",
exp: [["MULTILINESTRING((0 5, 2 5), (4 5, 5 5))", "MULTILINESTRING((5 5, 6 5), (8 5, 10 5))"],
["MULTILINESTRING((5 0, 5 2), (5 4, 5 5))", "MULTILINESTRING((5 5, 5 6), (5 8, 5 10))"]]
}, {
msg: "partial target and source split with source endpoint, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((0 5, 2 5), (4 5, 6 5), (8 5, 10 5))",
g2: "MULTILINESTRING((4 0, 4 2), (4 4, 4 6), (4 8, 4 10))",
exp: [[], ["MULTILINESTRING((4 0, 4 2), (4 4, 4 5))", "MULTILINESTRING((4 5, 4 6), (4 8, 4 10))"]]
}, {
msg: "partial target and source split with target endpoint, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((4 0, 4 2), (4 4, 4 6), (4 8, 4 10))",
g2: "MULTILINESTRING((0 5, 2 5), (4 5, 6 5), (8 5, 10 5))",
exp: [["MULTILINESTRING((4 0, 4 2), (4 4, 4 5))", "MULTILINESTRING((4 5, 4 6), (4 8, 4 10))"], []]
}, {
msg: "partial target and source split with source vertex, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((0 5, 2 5), (4 5, 5 5, 6 5), (8 5, 10 5))",
g2: "MULTILINESTRING((5 0, 5 2), (5 4, 5 6), (5 8, 5 10))",
exp: [["MULTILINESTRING((0 5, 2 5), (4 5, 5 5))", "MULTILINESTRING((5 5, 6 5), (8 5, 10 5))"], ["MULTILINESTRING((5 0, 5 2), (5 4, 5 5))", "MULTILINESTRING((5 5, 5 6), (5 8, 5 10))"]]
}, {
msg: "partial target and source split with target vertex, mutual true",
opt: {mutual: true},
g1: "MULTILINESTRING((5 0, 5 2), (5 4, 5 6), (5 8, 5 10))",
g2: "MULTILINESTRING((0 5, 2 5), (4 5, 5 5, 6 5), (8 5, 10 5))",
exp: [["MULTILINESTRING((5 0, 5 2), (5 4, 5 5))", "MULTILINESTRING((5 5, 5 6), (5 8, 5 10))"], ["MULTILINESTRING((0 5, 2 5), (4 5, 5 5))", "MULTILINESTRING((5 5, 6 5), (8 5, 10 5))"]]
}];
t.plan(cases.length);
var c, parts, part, midparts;
for(var i=0; i<cases.length; ++i) {
c = cases[i];
var g1 = wkt(c.g1);
var g2 = wkt(c.g2);
var got = g1.split(g2, c.opt);
var exp = c.exp;
if(got instanceof Array) {
parts = [];
for(var j=0; j<got.length; ++j) {
part = got[j];
if(part instanceof Array) {
midparts = [];
for(var k=0; k<part.length; ++k) {
midparts.push(part[k].toString());
}
parts.push("[" + midparts.join(", ") + "]");
} else {
parts.push(got[j].toString());
}
}
got = parts.join(", ");
}
if(exp instanceof Array) {
parts = [];
for(var j=0; j<exp.length; ++j) {
part = exp[j];
if(part instanceof Array) {
midparts = [];
for(var k=0; k<part.length; ++k) {
midparts.push(wkt(part[k]).toString());
}
parts.push("[" + midparts.join(", ") + "]");
} else {
parts.push(wkt(exp[j]).toString());
}
}
exp = parts.join(", ");
}
t.eq(got, exp, "case " + i + ": " + c.msg);
}
}
function test_getVertices(t) {
t.plan(22);