shift to quantize

1 files changed, 60 insertions, 0 deletions

diff --git a/rect.js b/rect.js
new file mode 100644
index 0000000..dcf2d33
--- /dev/null
+++ b/rect.js
@@ -0,0 +1,60 @@
+function rect (x0,y0,x1,y1){
+	if (x0 instanceof vec2) {
+		this.x = x0
+		this.y = y0
+	}
+	else if (x1 === undefined) {
+		this.x = new vec2(x0,x0)
+		this.y = new vec2(y0,y0)
+	}
+	else {
+		this.x = new vec2(x0,x1)
+		this.y = new vec2(y0,y1)
+	}
+	this.translation = new vec2(0,0)
+}
+rect.prototype.clone = function(){
+	return new rect( this.x.clone(), this.y.clone() )
+}
+rect.prototype.center = function(){
+	return new vec2(this.x.midpoint(), this.y.midpoint())
+}
+rect.prototype.area = function(){
+	return this.x.length() * this.y.length()
+}
+rect.prototype.normalize = function(){
+	this.x.normalize().add(this.translation.a)
+	this.y.normalize().add(this.translation.b)
+	this.translation.a = this.translation.b = 0
+	return this
+}
+rect.prototype.contains = function(x,y){
+	return this.x.contains(x) && this.y.contains(y)
+}
+rect.prototype.intersects = function(r){
+	return this.x.intersects(r.x) && this.y.intersects(r.y)
+}
+rect.prototype.width = function(){ return this.x.length() }
+rect.prototype.height = function(){ return this.y.length() }
+rect.prototype.fill = function(){
+	ctx.fillRect(this.x.a + this.translation.a, this.y.a + this.translation.b, this.x.length(), this.y.length())
+}
+rect.prototype.stroke = function(){
+	ctx.beginPath()
+	ctx.moveTo(this.x.a, this.y.a)
+	ctx.lineTo(this.x.b, this.y.b)
+	ctx.stroke()
+}
+rect.prototype.perimeter = function(){
+	line( this.x.a, this.y.a, this.x.b, this.y.a, this.translation )
+	line( this.x.a, this.y.b, this.x.b, this.y.b, this.translation )
+	line( this.x.a, this.y.a, this.x.a, this.y.b, this.translation )
+	line( this.x.b, this.y.a, this.x.b, this.y.b, this.translation )
+}
+rect.prototype.toString = function(){
+	return "[" + this.x.toString() + " " + this.y.toString() + "]"
+}
+rect.prototype.quantize = function(n){
+	this.x.quantize(n)
+	this.y.quantize(n)
+}