sharpetronics/Map-Projections
1
0
Fork 0
mirror of https://github.com/csharpee/Map-Projections.git synced 2025-12-13 00:00:07 -05:00
Code Issues Projects Releases Wiki Activity

watertight polygons

Browse Source 
I fixd the polygons!  I just had to remove the equal-to-endpoint rule and add a more specific exception for λ=-π.
This commit is contained in:
Justin Kunimune 2023-06-19 20:28:33 -07:00
parent 4675409725
commit ca0d6de292
1 changed files with 27 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/maps/Elastik.java
View File

@ -443,10 +443,11 @@ public class Elastik {
for (int i = 1; i < ф_vertices.length; i ++) { for (int i = 1; i < ф_vertices.length; i ++) {
if (abs(λ_vertices[i] - λ_vertices[i - 1]) > PI) if (abs(λ_vertices[i] - λ_vertices[i - 1]) > PI)
continue; // skip edges that are wrapping around the backside continue; // skip edges that are wrapping around the backside
// if our north-south line crosses it
if (λ_vertices[i - 1] != λ_vertices[i]) { // see if our north-south line crosses it
if ((λ_vertices[i - 1] < λ) != (λ_vertices[i] < λ) || boolean crosses = (λ_vertices[i - 1] < λ) != (λ_vertices[i] < λ) ||
λ_vertices[i - 1] == λ || λ_vertices[i] == λ) { (λ == -PI && min(λ_vertices[i - 1], λ_vertices[i]) == -PI);
if (crosses) {
// calculate *where* it crosses // calculate *where* it crosses
double ф_intersect; double ф_intersect;
if (ф_vertices[i - 1] != ф_vertices[i]) { if (ф_vertices[i - 1] != ф_vertices[i]) {
@ -467,7 +468,6 @@ public class Elastik {
crossings -= 1; crossings -= 1;
} }
} }
}
return crossings > 0; return crossings > 0;
} }
} }
@ -488,7 +488,7 @@ public class Elastik {
public SplineSurface(double[][] values) { public SplineSurface(double[][] values) {
this.values = values; this.values = values;
// set the gradients at the nodes // set the gradients at the nodes to finite-difference estimates
final int m = values.length; final int m = values.length;
final int n = values[0].length; final int n = values[0].length;
this.gradients_dф = new double[m][n]; this.gradients_dф = new double[m][n];