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| 1 | - | -- drafter.lua -- stateless approach |
| 1 | + | -- drafter.lua -- factory approach |
| 2 | ||
| 3 | local drafter = {}
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| 4 | ||
| 5 | - | function drafter.line(startX, startY, endX, endY, maxLength) |
| 5 | + | function drafter.line(maxLength) |
| 6 | - | local deltaX, deltaY = endX - startX, endY - startY |
| 6 | + | return function(startX, startY, endX, endY) |
| 7 | - | local requestedLength = math.sqrt(deltaX * deltaX + deltaY * deltaY) |
| 7 | + | local deltaX, deltaY = endX - startX, endY - startY |
| 8 | - | if requestedLength > maxLength then |
| 8 | + | local requestedLength = math.sqrt(deltaX * deltaX + deltaY * deltaY) |
| 9 | - | local ratio = maxLength / requestedLength |
| 9 | + | if requestedLength > maxLength then |
| 10 | - | endX, endY = startX + deltaX * ratio, startY + deltaY * ratio |
| 10 | + | local ratio = maxLength / requestedLength |
| 11 | endX, endY = startX + deltaX * ratio, startY + deltaY * ratio | |
| 12 | - | display.newLine(startX, startY, endX, endY) |
| 12 | + | end |
| 13 | display.newLine(startX, startY, endX, endY) | |
| 14 | end | |
| 15 | end | |
| 16 | ||
| 17 | return drafter |
