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Update the shaders

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Translate by (-x, -y) first, then by (x, y) to get it back to normal.
This commit is contained in:
Eryn Wells 2018-10-09 16:58:11 -07:00
parent 1b8fc1feb7
commit 141eee69ee
2 changed files with 4 additions and 3 deletions
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4
MetaballsKit/Metaballs.swift
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@ -307,9 +307,9 @@ public class Field {
// Create a transform matrix to handle it
let dx = Float(size.x) / 2.0
let dy = Float(size.y) / 2.0
let translate = Matrix3x3.translation(dx: dx, dy: dy)
let translate = Matrix3x3.translation(dx: -dx, dy: -dy)
let rotate = Matrix3x3.rotation(angle: rotation)
let invTranslate = Matrix3x3.translation(dx: -dx, dy: -dy)
let invTranslate = Matrix3x3.translation(dx: dx, dy: dy)
parameters.colorTransform = invTranslate * rotate * translate
// Save the value to defaults
defaults.colorRotation = rotation