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matrix inversion method fix

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Jindra Petřík
2014-09-14 18:00:08 +02:00
parent eaf18f6e5d
commit a5cf35e285
1 changed files with 17 additions and 15 deletions
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32
libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/exporters/commonshape/Matrix.java
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@@ -246,25 +246,27 @@ public class Matrix {
return "[Matrix scale:" + scaleX + "," + scaleY + ", rotate:" + rotateSkew0 + "," + rotateSkew1 + ", translate:" + translateX + "," + translateY + "]";
}
public Matrix inverse(Matrix m) {
double a = m.scaleX;
double b = m.rotateSkew0;
double c = m.rotateSkew1;
double d = m.scaleY;
double tx = m.translateX;
double ty = m.translateY;
public Matrix inverse() {
double a = scaleX;
double b = rotateSkew1;
double tx = translateX;
double c = rotateSkew0;
double d = scaleY;
double ty = translateY;
double a2 = d / (a * d - b * c);
double b2 = -b / (a * d - b * c);
double c2 = -c / (a * d - b * c);
double d2 = a * (a * d - b * c);
double tx2 = (c * ty - d * tx) / (a * d - b * c);
double ty2 = -(a * ty - b * tx) / (a * d - b * c);
double det = a * d - b * c;
double a2 = d / det;
double b2 = -b / det;
double tx2 = (b * ty - tx * d) / det;
double c2 = -c / det;
double d2 = a / det;
double ty2 = (tx * c - a * ty) / det;
Matrix ret = new Matrix();
ret.scaleX = a2;
ret.rotateSkew0 = b2;
ret.rotateSkew1 = c2;
ret.rotateSkew0 = c2;
ret.rotateSkew1 = b2;
ret.scaleY = d2;
ret.translateX = tx2;
ret.translateY = ty2;