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Rearrange math for worldToLocal.

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This commit is contained in:
NathanSweet 2019-12-18 16:15:21 +01:00
parent b3fd4515e9
commit e6672a763f
1 changed files with 3 additions and 3 deletions
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6
spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
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@ -539,10 +539,10 @@ public class Bone implements Updatable {
/** Transforms a point from world coordinates to the bone's local coordinates. */
public Vector2 worldToLocal (Vector2 world) {
if (world == null) throw new IllegalArgumentException("world cannot be null.");
float invDet = 1 / (a * d - b * c);
float det = a * d - b * c;
float x = world.x - worldX, y = world.y - worldY;
world.x = x * d * invDet - y * b * invDet;
world.y = y * a * invDet - x * c * invDet;
world.x = (x * d - y * b) / det;
world.y = (y * a - x * c) / det;
return world;
}