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Implemented (untested) splitting of bicubic curves using de Casteljau

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Originally committed to SVN as r1372.
This commit is contained in:
Rodrigo Braz Monteiro 2007-07-05 14:44:57 +00:00
parent 0bc8847f7a
commit 80b5c07a51
1 changed files with 19 additions and 1 deletions
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20
aegisub/spline.cpp
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@ -64,7 +64,25 @@ void SplineCurve::Split(SplineCurve &c1,SplineCurve &c2,float t) {
else if (type == CURVE_BICUBIC) {
c1.type = CURVE_BICUBIC;
c2.type = CURVE_BICUBIC;
// TODO
// Sub-divisions
float u = 1-t;
Vector2D p12 = p1*t+p2*u;
Vector2D p23 = p2*t+p3*u;
Vector2D p34 = p3*t+p4*u;
Vector2D p123 = p12*t+p23*u;
Vector2D p234 = p23*t+p34*u;
Vector2D p1234 = p123*t+p234*u;
// Set points
c1.p1 = p1;
c1.p2 = p12;
c1.p3 = p123;
c1.p4 = p1234;
c2.p1 = p1234;
c2.p2 = p234;
c2.p3 = p34;
c2.p4 = p4;
}
}