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Simplify rotation explanation

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oakes
2014-05-03 02:31:15 -04:00
parent e49bae9a97
commit 6bfd8dedcf
1 changed files with 3 additions and 5 deletions
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TUTORIAL.md
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@@ -65,16 +65,14 @@ A `texture` contains the underlying Java object. By default, it will be drawn at
:x 50 :y 50 :width 100 :height 100) :x 50 :y 50 :width 100 :height 100)
``` ```
You can also set scaling and rotation on a texture using :scale-x, :scale-y, and :angle, which all use either (:origin-x, :origin-y) as the center, or calculate it from the size of the texture: You can also set scaling and rotation on a texture using :scale-x, :scale-y, and :angle, which all use (:origin-x, :origin-y) as the center. For example, here we rotate it 45 degrees counter-clockwise around the bottom-left corner:
```clojure ```clojure
(assoc (texture "clojure.png") (assoc (texture "clojure.png")
:x 50 :y 50 :width 100 :height 100 :x 50 :y 50 :width 100 :height 100
:scale-x 1.5 :scale-y 0.75 :angle 30 :angle 45 :origin-x 0 :origin-y 0)
:origin-x 50 :origin-y 0)
``` ```
Note: if you're not rotating/scaling, try to set the angle and scale keys to nil, so that the simpler drawing function will be used.
## Input ## Input
Let's add a new function at the end of `defscreen` called `:on-key-down`, which runs when a key is pressed: Let's add a new function at the end of `defscreen` called `:on-key-down`, which runs when a key is pressed: