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function clear_canvas(){
ctx.fillStyle = "rgba(255,255,255,0.7)"
ctx.clearRect(0,0,w,h)
ctx.fillRect(0,0,w,h)
}
function draw_ruler(){
ctx.strokeStyle = "rgba(80,80,80,0.5)"
ctx.lineWidth = 1
var len = 5
for (var i = 0.5; i < w; i += 10) {
line(i, 0, i, len)
line(0, i, len, i)
}
}
function line (x,y,a,b,translation){
if (translation) {
x += translation.a
a += translation.a
y += translation.b
b += translation.b
}
ctx.beginPath()
ctx.moveTo(x,y)
ctx.lineTo(a,b)
ctx.stroke()
}
function draw_regions(regions){
for (var i = 0; i < regions.length; i++) {
if (regions[i].dupe) continue
ctx.fillStyle = colors[i % colors.length]
fill_region(regions[i])
stroke_sides(regions[i])
}
}
function draw_mouse(mouse){
ctx.fillStyle = "rgba(255,0,0,0.4)";
ctx.beginPath();
ctx.arc(mouse.x.b, mouse.y.b, 5, 0, 2*Math.PI, false);
ctx.fill();
if (mouse.width() != 0 && mouse.height() != 0) {
if (clipper.dragging) {
stroke_rect(mouse)
}
else {
ctx.fillStyle = "rgba(255,255,0,0.5)"
fill_region( mouse.clone().translate() )
}
}
}
function fill_region(r){
ctx.fillRect(r.x.a + r.translation.a,
r.y.a + r.translation.b,
r.x.length(),
r.y.length())
}
function stroke_sides (r){
if (r.sides & FRONT) line(r.x.a, r.y.a, r.x.b, r.y.a)
if (r.sides & BACK) line(r.x.a, r.y.b, r.x.b, r.y.b)
if (r.sides & LEFT) line(r.x.a, r.y.a, r.x.a, r.y.b)
if (r.sides & RIGHT) line(r.x.b, r.y.a, r.x.b, r.y.b)
}
function stroke_rect (r){
line(r.x.a, r.y.a, r.x.b, r.y.b, r.translation)
}
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