mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-27 04:08:53 +01:00
377 lines
7.5 KiB
Go
377 lines
7.5 KiB
Go
// Copyright 2014 Hajime Hoshi
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ebiten_test
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"testing"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
)
|
|
|
|
func TestGeoMInit(t *testing.T) {
|
|
var m ebiten.GeoM
|
|
for i := 0; i < ebiten.GeoMDim-1; i++ {
|
|
for j := 0; j < ebiten.GeoMDim; j++ {
|
|
got := m.Element(i, j)
|
|
want := 0.0
|
|
if i == j {
|
|
want = 1
|
|
}
|
|
if want != got {
|
|
t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGeoMAssign(t *testing.T) {
|
|
m := ebiten.GeoM{}
|
|
m.SetElement(0, 0, 1)
|
|
m2 := m
|
|
m.SetElement(0, 0, 0)
|
|
got := m2.Element(0, 0)
|
|
want := 1.0
|
|
if want != got {
|
|
t.Errorf("m2.Element(%d, %d) = %f, want %f", 0, 0, got, want)
|
|
}
|
|
}
|
|
|
|
func TestGeoMConcat(t *testing.T) {
|
|
matrix1 := ebiten.GeoM{}
|
|
matrix1.Scale(2, 2)
|
|
matrix2 := ebiten.GeoM{}
|
|
matrix2.Translate(1, 1)
|
|
|
|
matrix3 := matrix1
|
|
matrix3.Concat(matrix2)
|
|
expected := [][]float64{
|
|
{2, 0, 1},
|
|
{0, 2, 1},
|
|
}
|
|
for i := 0; i < 2; i++ {
|
|
for j := 0; j < 3; j++ {
|
|
got := matrix3.Element(i, j)
|
|
want := expected[i][j]
|
|
if want != got {
|
|
t.Errorf("matrix3.Element(%d, %d) = %f,"+
|
|
" want %f",
|
|
i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
matrix4 := matrix2
|
|
matrix4.Concat(matrix1)
|
|
expected = [][]float64{
|
|
{2, 0, 2},
|
|
{0, 2, 2},
|
|
}
|
|
for i := 0; i < 2; i++ {
|
|
for j := 0; j < 3; j++ {
|
|
got := matrix4.Element(i, j)
|
|
want := expected[i][j]
|
|
if want != got {
|
|
t.Errorf("matrix4.Element(%d, %d) = %f, want %f",
|
|
i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGeoMConcatSelf(t *testing.T) {
|
|
m := ebiten.GeoM{}
|
|
m.SetElement(0, 0, 1)
|
|
m.SetElement(0, 1, 2)
|
|
m.SetElement(0, 2, 3)
|
|
m.SetElement(1, 0, 4)
|
|
m.SetElement(1, 1, 5)
|
|
m.SetElement(1, 2, 6)
|
|
m.Concat(m)
|
|
expected := [][]float64{
|
|
{9, 12, 18},
|
|
{24, 33, 48},
|
|
}
|
|
for i := 0; i < 2; i++ {
|
|
for j := 0; j < 3; j++ {
|
|
got := m.Element(i, j)
|
|
want := expected[i][j]
|
|
if want != got {
|
|
t.Errorf("m.Element(%d, %d) = %f, want %f",
|
|
i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func geoMToString(g ebiten.GeoM) string {
|
|
a := g.Element(0, 0)
|
|
b := g.Element(0, 1)
|
|
c := g.Element(1, 0)
|
|
d := g.Element(1, 1)
|
|
tx := g.Element(0, 2)
|
|
ty := g.Element(1, 2)
|
|
return fmt.Sprintf("{a: %f, b: %f, c: %f, d: %f, tx: %f, ty: %f}", a, b, c, d, tx, ty)
|
|
}
|
|
|
|
func TestGeoMApply(t *testing.T) {
|
|
trans := ebiten.GeoM{}
|
|
trans.Translate(1, 2)
|
|
|
|
scale := ebiten.GeoM{}
|
|
scale.Scale(1.5, 2.5)
|
|
|
|
cpx := ebiten.GeoM{}
|
|
cpx.Rotate(math.Pi)
|
|
cpx.Scale(1.5, 2.5)
|
|
cpx.Translate(-2, -3)
|
|
|
|
cases := []struct {
|
|
GeoM ebiten.GeoM
|
|
InX float64
|
|
InY float64
|
|
OutX float64
|
|
OutY float64
|
|
}{
|
|
{
|
|
GeoM: ebiten.GeoM{},
|
|
InX: 3.14159,
|
|
InY: 2.81828,
|
|
OutX: 3.14159,
|
|
OutY: 2.81828,
|
|
},
|
|
{
|
|
GeoM: trans,
|
|
InX: 3.14159,
|
|
InY: 2.81828,
|
|
OutX: 4.14159,
|
|
OutY: 4.81828,
|
|
},
|
|
{
|
|
GeoM: scale,
|
|
InX: 3.14159,
|
|
InY: 2.81828,
|
|
OutX: 4.71239,
|
|
OutY: 7.04570,
|
|
},
|
|
{
|
|
GeoM: cpx,
|
|
InX: 3.14159,
|
|
InY: 2.81828,
|
|
OutX: -6.71239,
|
|
OutY: -10.04570,
|
|
},
|
|
}
|
|
|
|
const delta = 0.00001
|
|
|
|
for _, c := range cases {
|
|
rx, ry := c.GeoM.Apply(c.InX, c.InY)
|
|
if math.Abs(rx-c.OutX) > delta || math.Abs(ry-c.OutY) > delta {
|
|
t.Errorf("%s.Apply(%f, %f) = (%f, %f), want (%f, %f)", geoMToString(c.GeoM), c.InX, c.InY, rx, ry, c.OutX, c.OutY)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGeoMIsInvert(t *testing.T) {
|
|
zero := ebiten.GeoM{}
|
|
zero.Scale(0, 0)
|
|
|
|
trans := ebiten.GeoM{}
|
|
trans.Translate(1, 2)
|
|
|
|
scale := ebiten.GeoM{}
|
|
scale.Scale(1.5, 2.5)
|
|
|
|
cpx := ebiten.GeoM{}
|
|
cpx.Rotate(math.Pi)
|
|
cpx.Scale(1.5, 2.5)
|
|
cpx.Translate(-2, -3)
|
|
|
|
cpx2 := ebiten.GeoM{}
|
|
cpx2.Scale(2, 3)
|
|
cpx2.Rotate(0.234)
|
|
cpx2.Translate(100, 100)
|
|
|
|
skew := ebiten.GeoM{}
|
|
skew.Skew(1, 1)
|
|
|
|
cases := []struct {
|
|
GeoM ebiten.GeoM
|
|
Invertible bool
|
|
}{
|
|
{
|
|
GeoM: zero,
|
|
Invertible: false,
|
|
},
|
|
{
|
|
GeoM: ebiten.GeoM{},
|
|
Invertible: true,
|
|
},
|
|
{
|
|
GeoM: trans,
|
|
Invertible: true,
|
|
},
|
|
{
|
|
GeoM: scale,
|
|
Invertible: true,
|
|
},
|
|
{
|
|
GeoM: cpx,
|
|
Invertible: true,
|
|
},
|
|
{
|
|
GeoM: cpx2,
|
|
Invertible: true,
|
|
},
|
|
{
|
|
GeoM: skew,
|
|
Invertible: true,
|
|
},
|
|
}
|
|
|
|
pts := []struct {
|
|
X float64
|
|
Y float64
|
|
}{
|
|
{
|
|
X: 0,
|
|
Y: 0,
|
|
},
|
|
{
|
|
X: 1,
|
|
Y: 1,
|
|
},
|
|
{
|
|
X: 3.14159,
|
|
Y: 2.81828,
|
|
},
|
|
{
|
|
X: -1000,
|
|
Y: 1000,
|
|
},
|
|
}
|
|
|
|
const delta = 0.001
|
|
|
|
for _, c := range cases {
|
|
if c.GeoM.IsInvertible() != c.Invertible {
|
|
t.Errorf("%s.IsInvertible(): got: %t, want: %t", geoMToString(c.GeoM), c.GeoM.IsInvertible(), c.Invertible)
|
|
}
|
|
if !c.GeoM.IsInvertible() {
|
|
continue
|
|
}
|
|
invGeoM := c.GeoM
|
|
invGeoM.Invert()
|
|
for _, p := range pts {
|
|
x, y := p.X, p.Y
|
|
gotX, gotY := invGeoM.Apply(c.GeoM.Apply(x, y))
|
|
if math.Abs(gotX-x) > delta || math.Abs(gotY-y) > delta {
|
|
t.Errorf("%s.Apply(%s.Apply(%f, %f)): got: (%f, %f), want: (%f, %f)", geoMToString(invGeoM), geoMToString(c.GeoM), x, y, gotX, gotY, x, y)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func newGeoM(a, b, c, d, tx, ty float64) ebiten.GeoM {
|
|
outp := ebiten.GeoM{}
|
|
outp.SetElement(0, 0, a)
|
|
outp.SetElement(0, 1, b)
|
|
outp.SetElement(0, 2, tx)
|
|
outp.SetElement(1, 0, c)
|
|
outp.SetElement(1, 1, d)
|
|
outp.SetElement(1, 2, ty)
|
|
return outp
|
|
}
|
|
|
|
func TestGeomSkew(t *testing.T) {
|
|
testSkew := func(skewX, skewY float64, input, expected ebiten.GeoM) {
|
|
input.Skew(skewX, skewY)
|
|
for i := 0; i < 2; i++ {
|
|
for j := 0; j < 3; j++ {
|
|
got := input.Element(i, j)
|
|
want := expected.Element(i, j)
|
|
if want != got {
|
|
t.Errorf("Skew(%f, %f): got %s, want: %s", skewX, skewY, input.String(), expected.String())
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// skewX = 0.25
|
|
expectedX := newGeoM(1, math.Tan(0.25), math.Tan(0), 1, 0, 0)
|
|
testSkew(0.25, 0, ebiten.GeoM{}, expectedX)
|
|
|
|
// skewY = 0.25
|
|
expectedY := newGeoM(1, math.Tan(0), math.Tan(0.5), 1, 0, 0)
|
|
testSkew(0, 0.5, ebiten.GeoM{}, expectedY)
|
|
|
|
// skewX, skewY = 0.3, 0.8
|
|
expectedXY := newGeoM(1, math.Tan(0.3), math.Tan(0.8), 1, 0, 0)
|
|
testSkew(0.3, 0.8, ebiten.GeoM{}, expectedXY)
|
|
|
|
// skewX, skewY = 0.4, -1.8 ; b, c = 2, 3
|
|
expectedOffDiag := newGeoM(1+3*math.Tan(0.4), 2+math.Tan(0.4), 3+math.Tan(-1.8), 1+2*math.Tan(-1.8), 0, 0)
|
|
inputOffDiag := newGeoM(1, 2, 3, 1, 0, 0)
|
|
testSkew(0.4, -1.8, inputOffDiag, expectedOffDiag)
|
|
|
|
// skewX, skewY = -1.5, 1.5 ; tx, ty = 5, 6
|
|
expectedTrn := newGeoM(1, math.Tan(-1.5), math.Tan(1.5), 1, 5+math.Tan(-1.5)*6, 6+5*math.Tan(1.5))
|
|
inputTrn := newGeoM(1, 0, 0, 1, 5, 6)
|
|
testSkew(-1.5, 1.5, inputTrn, expectedTrn)
|
|
}
|
|
|
|
func TestGeoMEquals(t *testing.T) {
|
|
tests := []struct {
|
|
a ebiten.GeoM
|
|
b ebiten.GeoM
|
|
want bool
|
|
}{
|
|
{
|
|
a: ebiten.GeoM{},
|
|
b: ebiten.GeoM{},
|
|
want: true,
|
|
},
|
|
{
|
|
a: newGeoM(3, 1, 4, 1, 5, 9),
|
|
b: newGeoM(3, 1, 4, 1, 5, 9),
|
|
want: true,
|
|
},
|
|
{
|
|
a: newGeoM(3, 1, 4, 1, 5, 9),
|
|
b: newGeoM(3, 1, 4, 1, 5, 10),
|
|
want: false,
|
|
},
|
|
}
|
|
for _, test := range tests {
|
|
got := (test.a == test.b)
|
|
want := test.want
|
|
if got != want {
|
|
t.Errorf("%#v == %#v: got %t, want: %t", test.a, test.b, got, want)
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkGeoM(b *testing.B) {
|
|
var m ebiten.GeoM
|
|
for i := 0; i < b.N; i++ {
|
|
m = ebiten.GeoM{}
|
|
m.Translate(10, 20)
|
|
m.Scale(2, 3)
|
|
m.Rotate(math.Pi / 2)
|
|
}
|
|
}
|