-
Notifications
You must be signed in to change notification settings - Fork 401
Expand file tree
/
Copy pathpath-command.js
More file actions
91 lines (77 loc) · 2.48 KB
/
path-command.js
File metadata and controls
91 lines (77 loc) · 2.48 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
/**
* PathCommand
*/
( function( root, factory ) {
// module definition
if ( typeof module == 'object' && module.exports ) {
// CommonJS
module.exports = factory( require('./vector') );
} else {
// browser global
var Zdog = root.Zdog;
Zdog.PathCommand = factory( Zdog.Vector );
}
}( this, function factory( Vector ) {
function PathCommand( method, points, previousPoint ) {
this.method = method;
this.points = points.map( mapVectorPoint );
this.renderPoints = points.map( mapNewVector );
this.previousPoint = previousPoint;
this.endRenderPoint = this.renderPoints[ this.renderPoints.length - 1 ];
// arc actions come with previous point & corner point
// but require bezier control points
if ( method == 'arc' ) {
this.controlPoints = [ new Vector(), new Vector() ];
}
}
function mapVectorPoint( point ) {
if ( point instanceof Vector ) {
return point;
} else {
return new Vector( point );
}
}
function mapNewVector( point ) {
return new Vector( point );
}
PathCommand.prototype.reset = function() {
// reset renderPoints back to orignal points position
var points = this.points;
this.renderPoints.forEach( function( renderPoint, i ) {
var point = points[i];
renderPoint.set( point );
} );
};
PathCommand.prototype.transform = function( translation, rotation, scale ) {
this.renderPoints.forEach( function( renderPoint ) {
renderPoint.transform( translation, rotation, scale );
} );
};
PathCommand.prototype.render = function( ctx, elem, renderer ) {
return this[ this.method ]( ctx, elem, renderer );
};
PathCommand.prototype.move = function( ctx, elem, renderer ) {
return renderer.move( ctx, elem, this.renderPoints[0] );
};
PathCommand.prototype.line = function( ctx, elem, renderer ) {
return renderer.line( ctx, elem, this.renderPoints[0] );
};
PathCommand.prototype.bezier = function( ctx, elem, renderer ) {
var cp0 = this.renderPoints[0];
var cp1 = this.renderPoints[1];
var end = this.renderPoints[2];
return renderer.bezier( ctx, elem, cp0, cp1, end );
};
var arcHandleLength = 9/16;
PathCommand.prototype.arc = function( ctx, elem, renderer ) {
var prev = this.previousPoint;
var corner = this.renderPoints[0];
var end = this.renderPoints[1];
var cp0 = this.controlPoints[0];
var cp1 = this.controlPoints[1];
cp0.set( prev ).lerp( corner, arcHandleLength );
cp1.set( end ).lerp( corner, arcHandleLength );
return renderer.bezier( ctx, elem, cp0, cp1, end );
};
return PathCommand;
} ) );