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improve text placement a little

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This commit is contained in:
Hannes Janetzek
2013-01-21 03:11:53 +01:00
parent 70e6266319
commit 6a34e478f5
4 changed files with 273 additions and 131 deletions
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47
src/org/oscim/utils/GeometryUtils.java
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@@ -64,11 +64,12 @@ public final class GeometryUtils {
throw new IllegalStateException();
}
static boolean linesIntersect(double x1, double y1, double x2, double y2, double x3, double y3,
double x4, double y4) {
public static byte linesIntersect(
double x1, double y1, double x2, double y2,
double x3, double y3, double x4, double y4) {
// Return false if either of the lines have zero length
if (x1 == x2 && y1 == y2 || x3 == x4 && y3 == y4) {
return false;
return 0;
}
// Fastest method, based on Franklin Antonio's
// "Faster Line Segment Intersection" topic "in Graphics Gems III" book
@@ -85,21 +86,21 @@ public final class GeometryUtils {
if (commonDenominator > 0) {
if (alphaNumerator < 0 || alphaNumerator > commonDenominator) {
return false;
return 0;
}
} else if (commonDenominator < 0) {
if (alphaNumerator > 0 || alphaNumerator < commonDenominator) {
return false;
return 0;
}
}
double betaNumerator = ax * cy - ay * cx;
if (commonDenominator > 0) {
if (betaNumerator < 0 || betaNumerator > commonDenominator) {
return false;
return 0;
}
} else if (commonDenominator < 0) {
if (betaNumerator > 0 || betaNumerator < commonDenominator) {
return false;
return 0;
}
}
if (commonDenominator == 0) {
@@ -120,13 +121,13 @@ public final class GeometryUtils {
if (y1 >= y3 && y1 <= y4 || y1 <= y3 && y1 >= y4 || y2 >= y3 && y2 <= y4
|| y2 <= y3 && y2 >= y4
|| y3 >= y1 && y3 <= y2 || y3 <= y1 && y3 >= y2) {
return true;
return 2;
}
}
}
return false;
return 0;
}
return true;
return 1;
}
static boolean doesIntersect(double l1x1, double l1y1, double l1x2, double l1y2, double l2x1,
@@ -144,27 +145,10 @@ public final class GeometryUtils {
return ((ua >= 0.0d) && (ua <= 1.0d) && (ub >= 0.0d) && (ub <= 1.0d));
}
/**
* @param x1
* ...
* @param y1
* ...
* @param x2
* ...
* @param y2
* ...
* @param x3
* ...
* @param y3
* ...
* @param x4
* ...
* @param y4
* ...
* @return ...
*/
public static boolean lineIntersect(int x1, int y1, int x2, int y2, int x3, int y3, int x4,
int y4) {
public static boolean lineIntersect(
int x1, int y1, int x2, int y2,
int x3, int y3, int x4, int y4) {
float denom = (y4 - y3) * (x2 - x1) - (x4 - x3) * (y2 - y1);
if (denom == 0.0) { // Lines are parallel.
return false;
@@ -172,7 +156,6 @@ public final class GeometryUtils {
float ua = ((x4 - x3) * (y1 - y3) - (y4 - y3) * (x1 - x3)) / denom;
float ub = ((x2 - x1) * (y1 - y3) - (y2 - y1) * (x1 - x3)) / denom;
if (ua >= 0.0f && ua <= 1.0f && ub >= 0.0f && ub <= 1.0f) {
// Get the intersection point.
return true;
}