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fixed image pattern transform matrix

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This commit is contained in:
Thomas Friedel 2019-05-02 12:23:53 +02:00
parent 9b7322ff16
commit 23a92d2221
1 changed files with 4 additions and 3 deletions
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7
images.go
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@ -216,10 +216,11 @@ func (ip *ImagePattern) data() backendbase.ImagePatternData {
// to the given matrix. The matrix is a 3x3 matrix, but three // to the given matrix. The matrix is a 3x3 matrix, but three
// of the values are always identity values // of the values are always identity values
func (ip *ImagePattern) SetTransform(tf [6]float64) { func (ip *ImagePattern) SetTransform(tf [6]float64) {
m := mat(tf).invert()
ip.tf = [9]float64{ ip.tf = [9]float64{
tf[0], tf[1], 0, m[0], m[2], m[4],
tf[2], tf[3], 0, m[1], m[3], m[5],
tf[4], tf[5], 1, 0, 0, 1,
} }
ip.ip.Replace(ip.data()) ip.ip.Replace(ip.data())
} }