Author: LakeFox
Email: [email protected]
Date: Sat, 26 Apr 2025 15:16:04 -0600
gg/matrix.go
Found some memory errors and made GG a part of grim to adapt it better
Commits
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Diff 
diff --git a/gg/matrix.go b/gg/matrix.go
deleted file mode 100644
index 7d5b312..0000000
--- a/gg/matrix.go
+++ /dev/null
@@ -1,88 +0,0 @@
-package gg
-
-import "math"
-
-type Matrix struct {
-	XX, YX, XY, YY, X0, Y0 float64
-}
-
-func Identity() Matrix {
-	return Matrix{
-		1, 0,
-		0, 1,
-		0, 0,
-	}
-}
-
-func Translate(x, y float64) Matrix {
-	return Matrix{
-		1, 0,
-		0, 1,
-		x, y,
-	}
-}
-
-func Scale(x, y float64) Matrix {
-	return Matrix{
-		x, 0,
-		0, y,
-		0, 0,
-	}
-}
-
-func Rotate(angle float64) Matrix {
-	c := math.Cos(angle)
-	s := math.Sin(angle)
-	return Matrix{
-		c, s,
-		-s, c,
-		0, 0,
-	}
-}
-
-func Shear(x, y float64) Matrix {
-	return Matrix{
-		1, y,
-		x, 1,
-		0, 0,
-	}
-}
-
-func (a Matrix) Multiply(b Matrix) Matrix {
-	return Matrix{
-		a.XX*b.XX + a.YX*b.XY,
-		a.XX*b.YX + a.YX*b.YY,
-		a.XY*b.XX + a.YY*b.XY,
-		a.XY*b.YX + a.YY*b.YY,
-		a.X0*b.XX + a.Y0*b.XY + b.X0,
-		a.X0*b.YX + a.Y0*b.YY + b.Y0,
-	}
-}
-
-func (a Matrix) TransformVector(x, y float64) (tx, ty float64) {
-	tx = a.XX*x + a.XY*y
-	ty = a.YX*x + a.YY*y
-	return
-}
-
-func (a Matrix) TransformPoint(x, y float64) (tx, ty float64) {
-	tx = a.XX*x + a.XY*y + a.X0
-	ty = a.YX*x + a.YY*y + a.Y0
-	return
-}
-
-func (a Matrix) Translate(x, y float64) Matrix {
-	return Translate(x, y).Multiply(a)
-}
-
-func (a Matrix) Scale(x, y float64) Matrix {
-	return Scale(x, y).Multiply(a)
-}
-
-func (a Matrix) Rotate(angle float64) Matrix {
-	return Rotate(angle).Multiply(a)
-}
-
-func (a Matrix) Shear(x, y float64) Matrix {
-	return Shear(x, y).Multiply(a)
-}

package gg

import "math"

type Matrix struct {
	XX, YX, XY, YY, X0, Y0 float64
}

func Identity() Matrix {
	return Matrix{
		1, 0,
		0, 1,
		0, 0,
	}
}

func Translate(x, y float64) Matrix {
	return Matrix{
		1, 0,
		0, 1,
		x, y,
	}
}

func Scale(x, y float64) Matrix {
	return Matrix{
		x, 0,
		0, y,
		0, 0,
	}
}

func Rotate(angle float64) Matrix {
	c := math.Cos(angle)
	s := math.Sin(angle)
	return Matrix{
		c, s,
		-s, c,
		0, 0,
	}
}

func Shear(x, y float64) Matrix {
	return Matrix{
		1, y,
		x, 1,
		0, 0,
	}
}

func (a Matrix) Multiply(b Matrix) Matrix {
	return Matrix{
		a.XX*b.XX + a.YX*b.XY,
		a.XX*b.YX + a.YX*b.YY,
		a.XY*b.XX + a.YY*b.XY,
		a.XY*b.YX + a.YY*b.YY,
		a.X0*b.XX + a.Y0*b.XY + b.X0,
		a.X0*b.YX + a.Y0*b.YY + b.Y0,
	}
}

func (a Matrix) TransformVector(x, y float64) (tx, ty float64) {
	tx = a.XX*x + a.XY*y
	ty = a.YX*x + a.YY*y
	return
}

func (a Matrix) TransformPoint(x, y float64) (tx, ty float64) {
	tx = a.XX*x + a.XY*y + a.X0
	ty = a.YX*x + a.YY*y + a.Y0
	return
}

func (a Matrix) Translate(x, y float64) Matrix {
	return Translate(x, y).Multiply(a)
}

func (a Matrix) Scale(x, y float64) Matrix {
	return Scale(x, y).Multiply(a)
}

func (a Matrix) Rotate(angle float64) Matrix {
	return Rotate(angle).Multiply(a)
}

func (a Matrix) Shear(x, y float64) Matrix {
	return Shear(x, y).Multiply(a)
}