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var transform = (function(){
var p = [0,0], q = [0,0]
var mode
var copy
function down (e, lex, point){
p[0] = point[0]
p[1] = point[1]
q[0] = e.pageX
q[1] = e.pageY
undo.new()
undo.save_rect(0, 0, canvas.w, canvas.h)
copy = canvas.clone()
mode.init(e)
}
function move (e, lex, point){
var pdx = point[0] - p[0]
var pdy = point[1] - p[1]
var dx = e.pageX - q[0]
var dy = e.pageY - q[1]
var w = canvas.w
var h = canvas.h
mode.before(dx, dy, pdx, pdy, point)
for (var x = 0; x < w; x++) {
for (var y = 0; y < h; y++) {
lex = canvas.get(x, y)
if (! mode.shade( copy, canvas, lex, x, y, w, h )) {
lex.build()
}
}
}
}
function up (e){
}
var modes = {
rotate: {
init: function(e){
mode.theta = 0
},
before: function(dx, dy){
var radius = dist(0, 0, dx, dy)
if (radius < 10) return
mode.theta = angle(0, 0, dx, -dy)
},
shade: function(src, dest, lex, x, y, w, h){
x = (x/w) * 2 - 1
y = (y/h) * 2 - 1
var ca = cos(mode.theta)
var sa = sin(mode.theta)
var a = x * ca - y * sa
var b = x * sa + y * ca
x = (a + 1) / 2 * w
y = (b + 1) / 2 * h
var copy = src.get(x, y)
lex.assign(copy)
return true
},
},
scale: {
init: function(e){
mode.independent = e.shiftKey || e.altKey || e.metaKey
mode.x_scale = mode.y_scale = 0
},
before: function(dx, dy, pdx, pdy){
if (mode.independent) {
mode.x_scale = Math.pow(2, -pdx / (canvas.w / 8))
mode.y_scale = Math.pow(2, -pdy / (canvas.h / 8))
}
else {
mode.x_scale = mode.y_scale = Math.pow(2, -pdx / (canvas.w / 8))
}
},
shade: function(src, dest, lex, x, y, w, h){
x = ((x-p[0])/w) * 2 - 1
y = ((y-p[1])/h) * 2 - 1
x *= mode.x_scale
y *= mode.y_scale
x = (x + 1) / 2 * w
y = (y + 1) / 2 * h
var copy = src.get(x+p[0], y+p[1])
lex.assign(copy)
return true
},
},
translate: {
init: function(e){
mode.dx = mode.dy = 0
},
before: function(dx, dy, pdx, pdy){
mode.dx = -pdx
mode.dy = -pdy
},
shade: function(src, dest, lex, x, y, w, h){
var copy = src.get(x+mode.dx, y+mode.dy)
lex.assign(copy)
return true
},
},
slice: {
init: function(e){
mode.is_y = ! (e.altKey || e.metaKey)
mode.reverse = !! (e.shiftKey)
mode.position = 0
mode.direction = 0
mode.last_dd = -1
},
before: function(dx, dy, pdx, pdy, point){
var new_position = mode.is_y ? point[1] : point[0]
var dd = mode.is_y ? pdx : pdy
if (mode.position !== new_position) {
mode.position = new_position
mode.direction = 0
}
if (mode.last_dd !== -1) {
mode.direction = mode.last_dd - dd
}
console.log(mode.position)
mode.last_dd = dd
copy.assign(canvas)
},
shade: function(src, dest, lex, x, y, w, h){
if (mode.is_y) {
if (y >= mode.position || (mode.reverse && mode.position >= y)) {
var copy = src.get(x + mode.direction, y)
lex.assign(copy)
}
}
else if (x >= mode.position || (mode.reverse && mode.position >= x)) {
var copy = src.get(x, y + mode.direction)
lex.assign(copy)
}
return true
},
},
/*
mode: {
init: function(e){
},
before: function(dx, dy, pdx, pdy){
},
shade: function(src, dest, lex, x, y, w, h){
},
},
*/
}
function set_mode(m){
if (m in modes) {
mode = modes[m]
transforming = true
}
}
function done(){
transforming = false
copy && copy.demolish()
}
return {
down: down,
move: move,
up: up,
set_mode: set_mode,
modes: modes,
done: done,
}
})()
|
