scale

Append a scale transform inferred from arguments to the matrix m. This is equivalent to the expression

scale(...) * m

but actually save computation by knowing where the ones and zeros are in a pure scale matrix.

Mat3!(CommonType!(X, Y)) scale(X x, Y y)
auto scale(V v)
Mat4!(CommonType!(X, Y, Z)) scale(X x, Y y, Z z)
auto scale(V v)
M scale(M m, X x, Y y)
pure @safe @nogc nothrow
M
scale
(
M
X
Y
)
(
in M m
,
in X x
,
in Y y
)
if (
isMat!(3, 3, M) &&
allSatisfy!(isNumeric, X, Y)
)
M scale(M m, X x, Y y)
M scale(M m, V v)
M scale(M m, X x, Y y, Z z)
M scale(M m, X x, Y y, Z z)
M scale(M m, V v)

Examples

import gfx.math.approx : approxUlp;

immutable m = DMat3( 1, 2, 3, 4, 5, 6, 7, 8, 9 );

immutable expected = scale(4, 5) * m; // full multiplication
immutable result = scale(m, 4, 5);   // simplified multiplication

assert (approxUlp(expected, result));

import gfx.math.approx : approxUlp;

immutable m = DMat4( 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 );

immutable expected = scale(4, 5, 6) * m; // full multiplication
immutable result = scale(m, 4, 5, 6);   // simplified multiplication

assert (approxUlp(expected, result));

scale

Examples

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