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Implement cyclic scale opcode

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gamer147
2026-07-29 00:06:56 -04:00
parent f03c9481bf
commit 9b3fc89b72
12 changed files with 179 additions and 22 deletions
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14
engine/Age.Engine/Model/Transform2DMath.cs
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@@ -48,25 +48,29 @@ public readonly record struct Affine2D(double XX, double XY, double YX, double Y
}
/// <summary>Exact 2D projection of AGE's row-vector retained-object matrix. Native call order is anchored
/// scale, one-shot axis-angle rotation, translation, then separately anchored cyclic rotation. The adjacent
/// anchor translations cancel, yielding T(-a)*S*R1*T*Rcycle*T(+a). Z is projected away only afterward.</summary>
/// one-shot scale/axis-angle rotation/translation, then separately anchored cyclic scale and cyclic rotation.
/// The adjacent anchor translations cancel, yielding T(-a)*S*R1*T*Scycle*Rcycle*T(+a). Z is projected away
/// only afterward.</summary>
public static class Transform2DMath
{
public static Affine2D Build(TransformState t, RotationCycleState cycle = default)
public static Affine2D Build(TransformState t, RotationCycleState cycle = default,
ScaleCycleState scaleCycle = default)
{
Matrix3D m = Identity();
m = Mul(m, Translation(-t.AnchorX, -t.AnchorY, -t.AnchorZ));
m = Mul(m, Scale(t.ScaleX, t.ScaleY, t.ScaleZ));
m = Mul(m, AxisAngle(t.RotationAxisX, t.RotationAxisY, t.RotationAxisZ, t.RotationAngleDegrees));
m = Mul(m, Translation(t.TranslateX, t.TranslateY, t.TranslateZ));
if (scaleCycle.Enabled) m = Mul(m, Scale(scaleCycle.ScaleX, scaleCycle.ScaleY, scaleCycle.ScaleZ));
if (cycle.Enabled) m = Mul(m, AxisAngle(cycle.AxisX, cycle.AxisY, cycle.AxisZ, cycle.AngleDegrees));
m = Mul(m, Translation(t.AnchorX, t.AnchorY, t.AnchorZ));
return new(m.M11, m.M12, m.M21, m.M22, m.TX, m.TY);
}
public static (double X, double Y) Apply(double x, double y, TransformState transform,
RotationCycleState cycle = default)
=> Build(transform, cycle).Apply(x, y);
RotationCycleState cycle = default,
ScaleCycleState scaleCycle = default)
=> Build(transform, cycle, scaleCycle).Apply(x, y);
// AGE composes affine 4x4 row-vector matrices, whose last column is always (0,0,0,1). Carry only
// the 3x3 linear part and translation row as a value type: the old double[16] implementation allocated