Remove methods IsIdentity

colormatrix.go

@@ -60,11 +60,6 @@ func (c *ColorMatrix) Concat(other ColorMatrix) {
 	*c = result
 }
 
-// IsIdentity returns a boolean indicating whether the color matrix is an identity.
-func (c *ColorMatrix) IsIdentity() bool {
-	return isIdentity(c)
-}
-
 func (c *ColorMatrix) setElement(i, j int, element float64) {
 	c.es[i][j] = element
 }

colormatrix_test.go

@@ -13,17 +13,3 @@
 // limitations under the License.
 
 package ebiten_test
-
-import (
-	. "."
-	"testing"
-)
-
-func TestColorIdentity(t *testing.T) {
-	m := NewColorMatrix()
-	got := m.IsIdentity()
-	want := true
-	if want != got {
-		t.Errorf("matrix.IsIdentity() = %t, want %t", got, want)
-	}
-}

geometrymatrix.go

@@ -53,11 +53,6 @@ func (g *GeometryMatrix) Concat(other GeometryMatrix) {
 	*g = result
 }
 
-// IsIdentity returns a boolean indicating whether the geometry matrix is an identity.
-func (g *GeometryMatrix) IsIdentity() bool {
-	return isIdentity(g)
-}
-
 func (g *GeometryMatrix) setElement(i, j int, element float64) {
 	g.es[i][j] = element
 }

geometrymatrix_test.go

@@ -19,15 +19,6 @@ import (
 	"testing"
 )
 
-func TestGeometryIdentity(t *testing.T) {
-	m := NewGeometryMatrix()
-	got := m.IsIdentity()
-	want := true
-	if want != got {
-		t.Errorf("matrix.IsIdentity() = %t, want %t", got, want)
-	}
-}
-
 func TestGeometryConcat(t *testing.T) {
 	matrix1 := ScaleGeometry(2, 2)
 	matrix2 := TranslateGeometry(1, 1)