From 43d85fd34dc554eb4ad90a09c5ae9499ad99d387 Mon Sep 17 00:00:00 2001
From: Francisco Dans <fdansv@gmail.com>
Date: Fri, 14 Aug 2015 00:42:09 +0200
Subject: [PATCH] adds interpolation as an option

---
 lib/torque/renderer/point.js | 46 +++++++++++++++++++-----------------
 1 file changed, 24 insertions(+), 22 deletions(-)

diff --git a/lib/torque/renderer/point.js b/lib/torque/renderer/point.js
index 3ce0c7b..00b8f9c 100644
--- a/lib/torque/renderer/point.js
+++ b/lib/torque/renderer/point.js
@@ -199,24 +199,6 @@ var contour = require('./contour');
       prof.end(true);
     },
 
-    _gridData(tile){
-      var res = this.options.resolution;
-      var grid = new Array(256/res);
-      for(var i =0; i<grid.length; i ++){
-        grid[i] = new Array(256/res);
-        for(var j =0; j < grid[i].length; j++){
-          grid[i][j] = 0;
-        }
-      }
-
-      for(var i =0; i < tile.renderData.length; i++){
-        var x = tile.x[i], y = tile.y[i];
-        grid[y/res][x/res] = tile.renderData[i];
-      }
-
-      return grid;
-    },
-
     _createCanvas: function() {
       return this.options.canvasClass
         ? new this.options.canvasClass()
@@ -331,6 +313,25 @@ var contour = require('./contour');
       }
       prof.end(true);
     },
+
+    _gridData: function(tile){
+      var res = this.options.resolution;
+      var grid = new Array(256/res);
+      for(var i =0; i<grid.length; i ++){
+        grid[i] = new Array(256/res);
+        for(var j =0; j < grid[i].length; j++){
+          grid[i][j] = 0;
+        }
+      }
+
+      for(var i =0; i < tile.renderData.length; i++){
+        var x = tile.x[i], y = tile.y[i];
+        grid[y/res][x/res] = tile.renderData[i];
+      }
+
+      return grid.reverse(); // Torque tiles have an inverted y axis!
+    },
+
     _getPipe: function(cell, contour){
       var parsedCell = cell.map(function(cornerValue){
           if (cornerValue >= contour){
@@ -339,10 +340,11 @@ var contour = require('./contour');
           return "0";
         }).join("");
       var type = parseInt(parsedCell, 2);
-      var N = [this._lerp(cell[1], cell[0], contour), 0], 
-          S = [this._lerp(cell[2], cell[3], contour), 1], 
-          E = [1, this._lerp(cell[2], cell[1], contour)], 
-          W = [0, this._lerp(cell[3], cell[0], contour)]
+      var interpolated = true;
+      var N = interpolated?[this._lerp(cell[1], cell[0], contour), 0]: [0.5,0], 
+          S = interpolated?[this._lerp(cell[2], cell[3], contour), 1]: [0.5,1], 
+          E = interpolated?[1, this._lerp(cell[2], cell[1], contour)]: [1,0.5], 
+          W = interpolated?[0, this._lerp(cell[3], cell[0], contour)]: [0,0.5]
       // Blank
       if (type === 0 || type === 15) return null;
       // W - S