90 lines
2.7 KiB
Text
90 lines
2.7 KiB
Text
#-------------------------------------------------------------------------------
|
|
# Transform
|
|
#-------------------------------------------------------------------------------
|
|
# A transformation matrix which is used to transform an #Element on the canvas.
|
|
# The dimensions of the matrix are 3x3 where the last row is always 0 0 1:
|
|
#
|
|
# a c e
|
|
# b d f
|
|
# 0 0 1
|
|
#
|
|
# See http://www.w3.org/TR/SVG/coords.html#TransformMatrixDefined for details.
|
|
#
|
|
var Transform = {
|
|
new: func(node, vals = nil) {
|
|
var m = {
|
|
parents: [Transform],
|
|
_node: node,
|
|
a: node.getNode("m[0]", 1),
|
|
b: node.getNode("m[1]", 1),
|
|
c: node.getNode("m[2]", 1),
|
|
d: node.getNode("m[3]", 1),
|
|
e: node.getNode("m[4]", 1), #tx
|
|
f: node.getNode("m[5]", 1), #ty
|
|
};
|
|
|
|
var use_vals = typeof(vals) == "vector" and size(vals) == 6;
|
|
|
|
# initialize to identity matrix
|
|
m.a.setDoubleValue(use_vals ? vals[0] : 1);
|
|
m.b.setDoubleValue(use_vals ? vals[1] : 0);
|
|
m.c.setDoubleValue(use_vals ? vals[2] : 0);
|
|
m.d.setDoubleValue(use_vals ? vals[3] : 1);
|
|
m.e.setDoubleValue(use_vals ? vals[4] : 0);
|
|
m.f.setDoubleValue(use_vals ? vals[5] : 0);
|
|
|
|
return m;
|
|
},
|
|
|
|
setTranslation: func() {
|
|
var trans = _arg2valarray(arg);
|
|
|
|
me.e.setDoubleValue(trans[0]);
|
|
me.f.setDoubleValue(trans[1]);
|
|
|
|
return me;
|
|
},
|
|
|
|
# Set rotation (Optionally around a specified point instead of (0,0))
|
|
#
|
|
# setRotation(rot)
|
|
# setRotation(rot, cx, cy)
|
|
#
|
|
# @note If using with rotation center different to (0,0) do not use
|
|
# #setTranslation as it would interfere with the rotation.
|
|
setRotation: func(angle) {
|
|
var center = _arg2valarray(arg);
|
|
|
|
var s = math.sin(angle);
|
|
var c = math.cos(angle);
|
|
|
|
me.a.setDoubleValue(c); me.c.setDoubleValue(-s);
|
|
me.b.setDoubleValue(s); me.d.setDoubleValue(c);
|
|
|
|
if (size(center) == 2) {
|
|
me.e.setDoubleValue((-center[0] * c) + (center[1] * s) + center[0]);
|
|
me.f.setDoubleValue((-center[0] * s) - (center[1] * c) + center[1]);
|
|
}
|
|
|
|
return me;
|
|
},
|
|
|
|
# Set scale (either as parameters or array)
|
|
#
|
|
# If only one parameter is given its value is used for both x and y
|
|
# setScale(x, y)
|
|
# setScale([x, y])
|
|
setScale: func {
|
|
var scale = _arg2valarray(arg);
|
|
|
|
me.a.setDoubleValue(scale[0]);
|
|
me.d.setDoubleValue(size(scale) >= 2 ? scale[1] : scale[0]);
|
|
|
|
return me;
|
|
},
|
|
|
|
getScale: func() {
|
|
# TODO handle rotation
|
|
return [me.a.getValue(), me.d.getValue()];
|
|
}
|
|
};
|