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#strict 3
/*
// Examples:
obj->SetTransform([Rotate(90)]); // rotates graphics of obj around center by 90° clock-wise; array brackets necessary!
obj->SetTransform([Rotate(90), TranslateY(5)]); // rotates graphics of obj around center by 90° clock-wise and translates it down by 5 pixel
// order matters!
obj->SetTransform([TranslateY(5), Rotate(90)]); // translates graphics of obj down by 5 pixel and and rotates it around the point 5 pixel above center by 90° clock-wise; effectively the same as rotating around center by 90° and moving to the left by 5 pixel
// obj->ResetTransform(); // resets transformation
// Translate* and Rotate have a precision parameter, which defaults to 1:
obj->SetTransform([TranslateY(500, 1000)]); // translates graphics of obj down by 0.5 pixel
obj->SetTransform([TranslateY(1, 2)]); // also translates graphics of obj down by 0.5 pixel
// Working with overlays:
// base graphic is overlay 0 as usual
obj->SetTransform([...], 1); // applies to overlay 1
obj->SetTransform([...], -10); // applies to overlays 0 through 10 (inclusive)
obj->SetTransform([...], [1, 5]); // applies to overlays 1 and 5
obj->SetTransform([...], [2, -4, 10, -11, 42]); // applies to overlays 2,3,4 and 10,11 and 42
obj->ResetTransform(overlays); // resets transformations of overlays as specified in SetTransform
*/
// All matrices are stored linearly in row major order
global func ResetTransform(overlays)
{
for(var overlay in TransformOverlays(overlays))
{
if(overlay)
{
SetObjDrawTransform(1000, 0, 0, 0, 1000, 0, this, overlay);
}
else
{
SetObjDrawTransform();
}
}
}
global func SetTransform(array transforms, overlays)
{
for(var overlay in TransformOverlays(overlays))
{
ResetTransform(overlay);
AddTransform(transforms, overlay);
}
}
global func AddTransform(array transforms, overlays)
{
for(var overlay in TransformOverlays(overlays))
{
for(var transform in transforms)
{
SetObjDrawTransform2(transform[0], transform[1], transform[2], transform[3], transform[4], transform[5], transform[6], transform[7], transform[8], overlay);
}
}
}
global func TransformOverlays(overlays)
{
overlays ??= 0;
if(GetType(overlays) == C4V_Int)
{
if(overlays >= 0) return [overlays];
else
{
var ret = [];
overlays = Abs(overlays);
for(var i = 0; i <= overlays; ++i)
{
ret[] = i;
}
return ret;
}
}
else if(GetType(overlays) == C4V_Array)
{
var ret = [], last;
last = overlays[0];
var i = 1;
if(last < 0)
{
i = 0;
last = 0;
}
else
{
ret[0] = last;
}
for(; i < GetLength(overlays); ++i)
{
var overlay = overlays[i];
if(overlay < 0)
{
overlay = Abs(overlay);
for(var j = last + 1; j <= overlay; ++j)
{
ret[] = j;
}
}
else
{
ret[] = overlay;
}
last = overlay;
}
return ret;
}
else
{
FatalError("TransformOverlays: overlays must be a single integer or an array.");
}
}
global func Rotate(int phi, int prec)
{
prec ??= 1;
var cos = Cos(phi, 1000, prec);
var sin = Sin(phi, 1000, prec);
return [
cos, -sin, 0,
sin, cos, 0,
0, 0, 1000
];
}
global func ScaleXY(int x, int y)
{
return [
x, 0, 0,
0, y, 0,
0, 0, 1000
];
}
global func ScaleX(int f) { return ScaleXY(f, 1000); }
global func ScaleY(int f) { return ScaleXY(1000, f); }
global func Scale(int f)
{
return [
1000, 0, 0,
0, 1000, 0,
0, 0, 1000000/f
];
}
global func TranslateXY(int x, int y, int prec)
{
prec ??= 1;
return [
1000, 0, x * 1000 / prec,
0, 1000, y * 1000 / prec,
0, 0, 1000
];
}
global func TranslateX(int x, int prec) { return TranslateXY(x, 0, prec); }
global func TranslateY(int y, int prec) { return TranslateXY(0, y, prec); }
global func MirrorX()
{
return [
-1000, 0, 0,
0, 1000, 0,
0, 0, 1000
];
}
global func MirrorY()
{
return [
1000, 0, 0,
0, -1000, 0,
0, 0, 1000
];
}
global func SkewXY(int x, int y)
{
return [
1000, x, 0,
y, 1000, 0,
0, 0, 1000
];
}
global func SkewX(int x) { return SkewXY(x, 0); }
global func SkewY(int y) { return SkewXY(0, y); }
global func Matrix3x3Multiply(array a, array b, int precision)
{
return [
(a[6] * b[2] + a[3] * b[1] + a[0] * b[0]) / precision, (a[7] * b[2] + a[4] * b[1] + a[1] * b[0]) / precision, (a[8] * b[2] + a[5] * b[1] + a[2] * b[0]) / precision,
(a[6] * b[5] + a[3] * b[4] + a[0] * b[3]) / precision, (a[7] * b[5] + a[4] * b[4] + a[1] * b[3]) / precision, (a[8] * b[5] + a[5] * b[4] + a[2] * b[3]) / precision,
(a[6] * b[8] + a[3] * b[7] + a[0] * b[6]) / precision, (a[7] * b[8] + a[4] * b[7] + a[1] * b[6]) / precision, (a[8] * b[8] + a[5] * b[7] + a[2] * b[6]) / precision
];
}
// Combines several transforms (as used for SetTransform) into one transform. Returns a single transform (like all other transform functions).
// May be used to cache transforms. For direct application use SetTransform instead, which implicitly uses the native engine implementation of matrix multiplication.
global func PreTransform(array transforms)
{
if(!transforms || GetLength(transforms) == 0)
{
FatalError("PreTransform called without transforms.");
}
else
{
var ret = transforms[0];
for(var i = 1; i < GetLength(transforms); ++i)
{
ret = Matrix3x3Multiply(ret, transforms[i], 1000);
}
return ret;
}
}
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