1 files changed, 128 insertions, 0 deletions
diff --git a/jaws/src/rect.js b/jaws/src/rect.js
new file mode 100755
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+++ b/jaws/src/rect.js
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+var jaws = (function(jaws) {
+
+/*
+* 2013-09-28:
+*
+* For a 10x10 sprite in the topleft corner, should sprite.rect().bottom be 9 or 10?
+* There's no right or wrong answer. In some cases 9 makes sense (if checking directly for pixel-values for example).
+* In other cases 10 makes sense (bottom = x + height).
+*
+* The important part is beeing consistent across the lib/game.
+* Jaws started out with bottom = x + height so we'll continue with that way until good reasons to change come up.
+* Therefore correction = 0 for now.
+*/
+var correction = 0;
+
+/**
+  @class A Basic rectangle.
+  @example
+  rect = new jaws.Rect(5,5,20,20)
+  rect.right  // -> 25
+  rect.bottom // -> 25
+  rect.move(10,20)
+  rect.right  // -> 35
+  rect.bottom // -> 45
+  rect.width  // -> 20
+  rect.height // -> 20
+*/
+jaws.Rect = function Rect(x, y, width, height) {
+  if( !(this instanceof arguments.callee) ) return new arguments.callee(x, y, width, height);
+  
+  this.x = x
+  this.y = y
+  this.width = width
+  this.height = height
+  this.right = x + width - correction
+  this.bottom = y + height - correction
+}
+
+/** Return position as [x,y] */
+jaws.Rect.prototype.getPosition = function() {
+  return [this.x, this.y]
+}
+
+/** Move rect x pixels horizontally and y pixels vertically */
+jaws.Rect.prototype.move = function(x, y) {
+  this.x += x
+  this.y += y
+  this.right += x
+  this.bottom += y
+  return this
+}
+
+/** Set rects x/y */
+jaws.Rect.prototype.moveTo = function(x, y) {
+  this.x = x
+  this.y = y
+  this.right = this.x + this.width - correction
+  this.bottom = this.y + this.height - correction
+  return this
+}
+/** Modify width and height */
+jaws.Rect.prototype.resize = function(width, height) {
+  this.width += width
+  this.height += height
+  this.right = this.x + this.width - correction
+  this.bottom = this.y + this.height - correction
+  return this
+}
+
+/** Returns a new rect witht he same dimensions */
+jaws.Rect.prototype.clone = function() {
+  return new jaws.Rect(this.x, this.y, this.width, this.height)
+}
+
+/** Shrink rectangle on both axis with given x/y values  */
+jaws.Rect.prototype.shrink = function(x, y) {
+  this.x += x
+  this.y += y
+  this.width -= (x+x)
+  this.height -= (y+y)
+  this.right = this.x + this.width - correction
+  this.bottom = this.y + this.height - correction
+  return this
+}
+
+/** Set width and height */
+jaws.Rect.prototype.resizeTo = function(width, height) {
+  this.width = width
+  this.height = height
+  this.right = this.x + this.width - correction
+  this.bottom = this.y + this.height - correction
+  return this
+}
+
+/** Draw rect in color red, useful for debugging */
+jaws.Rect.prototype.draw = function() {
+  jaws.context.strokeStyle = "red"
+  jaws.context.strokeRect(this.x-0.5, this.y-0.5, this.width, this.height)
+  return this
+}
+
+/** Returns true if point at x, y lies within calling rect */
+jaws.Rect.prototype.collidePoint = function(x, y) {
+  return (x >= this.x && x <= this.right && y >= this.y && y <= this.bottom)
+}
+
+/** Returns true if calling rect overlaps with given rect in any way */
+jaws.Rect.prototype.collideRect = function(rect) {
+  return ((this.x >= rect.x && this.x <= rect.right) || (rect.x >= this.x && rect.x <= this.right)) &&
+         ((this.y >= rect.y && this.y <= rect.bottom) || (rect.y >= this.y && rect.y <= this.bottom))
+}
+
+/*
+// Possible future functions
+jaws.Rect.prototype.collideRightSide = function(rect)  { return(this.right >= rect.x && this.x < rect.x) }
+jaws.Rect.prototype.collideLeftSide = function(rect)   { return(this.x > rect.x && this.x <= rect.right) }
+jaws.Rect.prototype.collideTopSide = function(rect)    { return(this.y >= rect.y && this.y <= rect.bottom) }
+jaws.Rect.prototype.collideBottomSide = function(rect) { return(this.bottom >= rect.y && this.y < rect.y) }
+*/
+
+jaws.Rect.prototype.toString = function() { return "[Rect " + this.x + ", " + this.y + ", " + this.width + ", " + this.height + "]" }
+
+return jaws;
+})(jaws || {});
+
+// Support CommonJS require()
+if(typeof module !== "undefined" && ('exports' in module)) { module.exports = jaws.Rect }
+