New Triangle methods: BuildRight, BuildEquilateral, Clone, CopyFrom, Rotate, RotateAroundPoint and RotateAroundXY.

Author: photonstorm

v3/src/checksum.js

@@ -1,4 +1,4 @@
 var CHECKSUM = {
-build: '36a75180-14e9-11e7-ba0a-191be9c0e55a'
+build: '7e90d280-1540-11e7-adf9-8b058a0651ee'
 };
 module.exports = CHECKSUM;

v3/src/geom/line/CopyFrom.js

@@ -1,8 +1,8 @@
 /**
-* Copies the x, y and diameter properties from any given object to this Circle.
-* @method Phaser.Circle#copyFrom
+* Copies the x, y and diameter properties from any given object to this Line.
+* @method Phaser.Line#copyFrom
 * @param {any} source - The object to copy from.
-* @return {Circle} This Circle object.
+* @return {Line} This Line object.
 */
 var CopyFrom = function (source, dest)
 {

v3/src/geom/triangle/BuildEquilateral.js

@@ -0,0 +1,26 @@
+var Triangle = require('./Triangle');
+
+// Builds an equilateral triangle.
+// In the equilateral triangle, all the sides are the same length (congruent)
+// and all the angles are the same size (congruent).
+
+//  The x/y specifies the top-middle of the triangle (x1/y1) and length
+//  is the length of each side
+
+var BuildEquilateral = function (x, y, length)
+{
+    var height = length * (Math.sqrt(3) / 2);
+
+    var x1 = x;
+    var y1 = y;
+
+    var x2 = x + (length / 2);
+    var y2 = y + height;
+
+    var x3 = x - (length / 2);
+    var y3 = y + height;
+
+    return new Triangle(x1, y1, x2, y2, x3, y3);
+};
+
+module.exports = BuildEquilateral;

v3/src/geom/triangle/BuildRight.js

@@ -0,0 +1,24 @@
+var Triangle = require('./Triangle');
+
+//  Builds a right triangle, with one 90 degree angle and two acute angles
+//  The x/y is the coordinate of the 90 degree angle (and will map to x1/y1 in the resulting Triangle)
+//  w/h can be positive or negative and represent the length of each side
+
+var BuildRight = function (x, y, width, height)
+{
+    if (height === undefined) {  height = width; }
+
+    //  90 degree angle
+    var x1 = x;
+    var y1 = y;
+
+    var x2 = x;
+    var y2 = y - height;
+
+    var x3 = x + width;
+    var y3 = y;
+
+    return new Triangle(x1, y1, x2, y2, x3, y3);
+};
+
+module.exports = BuildRight;

v3/src/geom/triangle/Clone.js

@@ -0,0 +1,8 @@
+var Triangle = require('./Triangle');
+
+var Clone = function (source)
+{
+    return new Triangle(source.x1, source.y1, source.x2, source.y2, source.x3, source.y3);
+};
+
+module.exports = Clone;

v3/src/geom/triangle/CopyFrom.js

@@ -0,0 +1,12 @@
+/**
+* Copies the x1, y1 - x3, y3 properties from any given object to this Triangle.
+* @method Phaser.Line#copyFrom
+* @param {any} source - The object to copy from.
+* @return {Line} This Line object.
+*/
+var CopyFrom = function (source, dest)
+{
+    return dest.setTo(source.x1, source.y1, source.x2, source.y2, source.x3, source.y3);
+};
+
+module.exports = CopyFrom;

v3/src/geom/triangle/Rotate.js

@@ -0,0 +1,11 @@
+var RotateAroundXY = require('./RotateAroundXY');
+var InCenter = require('./InCenter');
+
+var Rotate = function (triangle, angle)
+{
+    var point = InCenter(triangle);
+
+    return RotateAroundXY(triangle, point.x, point.y, angle);
+};
+
+module.exports = Rotate;

v3/src/geom/triangle/RotateAroundPoint.js

@@ -0,0 +1,8 @@
+var RotateAroundXY = require('./RotateAroundXY');
+
+var RotateAroundPoint = function (triangle, point, angle)
+{
+    return RotateAroundXY(triangle, point.x, point.y, angle);
+};
+
+module.exports = RotateAroundPoint;

v3/src/geom/triangle/RotateAroundXY.js

@@ -0,0 +1,28 @@
+
+var RotateAroundXY = function (triangle, x, y, angle)
+{
+    var c = Math.cos(angle);
+    var s = Math.sin(angle);
+
+    var tx = triangle.x1 - x;
+    var ty = triangle.y1 - y;
+
+    triangle.x1 = tx * c - ty * s + x;
+    triangle.y1 = tx * s + ty * c + y;
+
+    tx = triangle.x2 - x;
+    ty = triangle.y2 - y;
+
+    triangle.x2 = tx * c - ty * s + x;
+    triangle.y2 = tx * s + ty * c + y;
+
+    tx = triangle.x3 - x;
+    ty = triangle.y3 - y;
+
+    triangle.x3 = tx * c - ty * s + x;
+    triangle.y3 = tx * s + ty * c + y;
+
+    return triangle;
+};
+
+module.exports = RotateAroundXY;

v3/src/geom/triangle/index.js

@@ -2,11 +2,18 @@
 
 var Triangle = require('./Triangle');
 
+Triangle.Area = require('./Area');
+Triangle.BuildEquilateral = require('./BuildEquilateral');
+Triangle.BuildRight = require('./BuildRight');
 Triangle.Centroid = require('./Centroid');
 Triangle.CircumCenter = require('./CircumCenter');
 Triangle.CircumCircle = require('./CircumCircle');
+Triangle.Clone = require('./Clone');
 Triangle.Contains = require('./Contains');
 Triangle.ContainsPoint = require('./ContainsPoint');
 Triangle.InCenter = require('./InCenter');
+Triangle.Rotate = require('./Rotate');
+Triangle.RotateAroundPoint = require('./RotateAroundPoint');
+Triangle.RotateAroundXY = require('./RotateAroundXY');
 
 module.exports = Triangle;