Created
June 1, 2014 00:29
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Line() primitive for famo.us
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| class Line | |
| constructor: (@options)-> | |
| if !@options.container | |
| @options.container= mainContext | |
| @s= new Surface({ | |
| size:[0, @options.width||2] | |
| properties:{ | |
| "background-color":@options.color||"pink" | |
| } | |
| }) | |
| @move= new Modifier({ | |
| transform: Transform.translate(@options.start[0]||0, @options.start[1]||0) | |
| }) | |
| @rotate= new StateModifier({ | |
| origin:[0,0] | |
| }) | |
| @options.container.add(@move).add(@rotate).add(@s) | |
| @update(@options.start, @options.end) | |
| update:(start, end)-> | |
| if !start || !end || start[0]==null || start[1]==null || end[0]==null || end[1]==null | |
| return | |
| #switch start-end if it's backwards | |
| if (end[0] - start[0]) < 0 | |
| tmp= JSON.parse(JSON.stringify(start)) | |
| start= JSON.parse(JSON.stringify(end)) | |
| end= tmp | |
| @move.setTransform(Transform.translate(start[0], start[1]), fns.wall_transition) | |
| #pythagorean theroem | |
| delta_x= end[0] - start[0] | |
| delta_y= end[1] - start[1] | |
| sum= Math.pow(delta_y,2) + Math.pow(delta_x,2) | |
| length= parseInt(Math.sqrt(sum)) | |
| #sohcahtoa | |
| angle = Math.atan(delta_y/delta_x) #* (180/Math.PI); | |
| #set transitions | |
| @s.setSize([length, @s.getSize()[1]], fns.wall_transition) | |
| @rotate.setTransform(Transform.rotateZ(angle), fns.wall_transition) |
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