357 lines
10 KiB
Go
357 lines
10 KiB
Go
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package pixel_test
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import (
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"fmt"
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"reflect"
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"testing"
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"github.com/faiface/pixel"
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)
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func TestRect_Resize(t *testing.T) {
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type rectTestTransform struct {
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name string
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f func(pixel.Rect) pixel.Rect
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}
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// rectangles
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squareAroundOrigin := pixel.R(-10, -10, 10, 10)
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squareAround2020 := pixel.R(10, 10, 30, 30)
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rectangleAroundOrigin := pixel.R(-20, -10, 20, 10)
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rectangleAround2020 := pixel.R(0, 10, 40, 30)
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// resize transformations
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resizeByHalfAroundCenter := rectTestTransform{"by half around center", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Center(), rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMin := rectTestTransform{"by half around Min", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Min, rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMax := rectTestTransform{"by half around Max", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(rect.Max, rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundMiddleOfLeftSide := rectTestTransform{"by half around middle of left side", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(pixel.V(rect.Min.X, rect.Center().Y), rect.Size().Scaled(0.5))
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}}
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resizeByHalfAroundOrigin := rectTestTransform{"by half around the origin", func(rect pixel.Rect) pixel.Rect {
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return rect.Resized(pixel.ZV, rect.Size().Scaled(0.5))
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}}
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testCases := []struct {
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input pixel.Rect
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transform rectTestTransform
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answer pixel.Rect
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}{
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{squareAroundOrigin, resizeByHalfAroundCenter, pixel.R(-5, -5, 5, 5)},
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{squareAround2020, resizeByHalfAroundCenter, pixel.R(15, 15, 25, 25)},
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{rectangleAroundOrigin, resizeByHalfAroundCenter, pixel.R(-10, -5, 10, 5)},
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{rectangleAround2020, resizeByHalfAroundCenter, pixel.R(10, 15, 30, 25)},
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{squareAroundOrigin, resizeByHalfAroundMin, pixel.R(-10, -10, 0, 0)},
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{squareAround2020, resizeByHalfAroundMin, pixel.R(10, 10, 20, 20)},
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{rectangleAroundOrigin, resizeByHalfAroundMin, pixel.R(-20, -10, 0, 0)},
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{rectangleAround2020, resizeByHalfAroundMin, pixel.R(0, 10, 20, 20)},
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{squareAroundOrigin, resizeByHalfAroundMax, pixel.R(0, 0, 10, 10)},
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{squareAround2020, resizeByHalfAroundMax, pixel.R(20, 20, 30, 30)},
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{rectangleAroundOrigin, resizeByHalfAroundMax, pixel.R(0, 0, 20, 10)},
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{rectangleAround2020, resizeByHalfAroundMax, pixel.R(20, 20, 40, 30)},
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{squareAroundOrigin, resizeByHalfAroundMiddleOfLeftSide, pixel.R(-10, -5, 0, 5)},
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{squareAround2020, resizeByHalfAroundMiddleOfLeftSide, pixel.R(10, 15, 20, 25)},
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{rectangleAroundOrigin, resizeByHalfAroundMiddleOfLeftSide, pixel.R(-20, -5, 0, 5)},
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{rectangleAround2020, resizeByHalfAroundMiddleOfLeftSide, pixel.R(0, 15, 20, 25)},
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{squareAroundOrigin, resizeByHalfAroundOrigin, pixel.R(-5, -5, 5, 5)},
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{squareAround2020, resizeByHalfAroundOrigin, pixel.R(5, 5, 15, 15)},
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{rectangleAroundOrigin, resizeByHalfAroundOrigin, pixel.R(-10, -5, 10, 5)},
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{rectangleAround2020, resizeByHalfAroundOrigin, pixel.R(0, 5, 20, 15)},
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}
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for _, testCase := range testCases {
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t.Run(fmt.Sprintf("Resize %v %s", testCase.input, testCase.transform.name), func(t *testing.T) {
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testResult := testCase.transform.f(testCase.input)
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if testResult != testCase.answer {
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t.Errorf("Got: %v, wanted: %v\n", testResult, testCase.answer)
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}
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})
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}
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}
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func TestRect_Edges(t *testing.T) {
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type fields struct {
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Min pixel.Vec
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Max pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want [4]pixel.Line
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}{
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{
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name: "Get edges",
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fields: fields{Min: pixel.V(0, 0), Max: pixel.V(10, 10)},
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want: [4]pixel.Line{
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pixel.L(pixel.V(0, 0), pixel.V(0, 10)),
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pixel.L(pixel.V(0, 10), pixel.V(10, 10)),
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pixel.L(pixel.V(10, 10), pixel.V(10, 0)),
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pixel.L(pixel.V(10, 0), pixel.V(0, 0)),
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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r := pixel.Rect{
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Min: tt.fields.Min,
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Max: tt.fields.Max,
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}
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if got := r.Edges(); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Rect.Edges() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestRect_Vertices(t *testing.T) {
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type fields struct {
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Min pixel.Vec
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Max pixel.Vec
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}
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tests := []struct {
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name string
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fields fields
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want [4]pixel.Vec
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}{
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{
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name: "Get corners",
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fields: fields{Min: pixel.V(0, 0), Max: pixel.V(10, 10)},
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want: [4]pixel.Vec{
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pixel.V(0, 0),
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pixel.V(0, 10),
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pixel.V(10, 10),
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pixel.V(10, 0),
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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r := pixel.Rect{
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Min: tt.fields.Min,
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Max: tt.fields.Max,
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}
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if got := r.Vertices(); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Rect.Vertices() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestRect_IntersectCircle(t *testing.T) {
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type fields struct {
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Min pixel.Vec
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Max pixel.Vec
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}
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type args struct {
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c pixel.Circle
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}
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tests := []struct {
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name string
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fields fields
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args args
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want pixel.Vec
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}{
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{
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name: "Rect.IntersectCircle(): no overlap",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(50, 50), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): circle contains rect",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, 5), 10)},
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want: pixel.V(-15, 0),
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},
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{
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name: "Rect.IntersectCircle(): rect contains circle",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, 5), 1)},
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want: pixel.V(-6, 0),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps bottom-left corner",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(-0.5, -0.5), 1)},
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want: pixel.V(-0.2, -0.2),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps top-left corner",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(-0.5, 10.5), 1)},
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want: pixel.V(-0.2, 0.2),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps bottom-right corner",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(10.5, -0.5), 1)},
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want: pixel.V(0.2, -0.2),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps top-right corner",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(10.5, 10.5), 1)},
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want: pixel.V(0.2, 0.2),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps two corners",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(0, 5), 6)},
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want: pixel.V(6, 0),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps left edge",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(0, 5), 1)},
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want: pixel.V(1, 0),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps bottom edge",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, 0), 1)},
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want: pixel.V(0, 1),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps right edge",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(10, 5), 1)},
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want: pixel.V(-1, 0),
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},
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{
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name: "Rect.IntersectCircle(): circle overlaps top edge",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, 10), 1)},
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want: pixel.V(0, -1),
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},
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{
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name: "Rect.IntersectCircle(): edge is tangent of left side",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(-1, 5), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): edge is tangent of top side",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, -1), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): circle above rectangle",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, 12), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): circle below rectangle",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(5, -2), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): circle left of rectangle",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(-1, 5), 1)},
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want: pixel.ZV,
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},
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{
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name: "Rect.IntersectCircle(): circle right of rectangle",
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fields: fields{Min: pixel.ZV, Max: pixel.V(10, 10)},
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args: args{c: pixel.C(pixel.V(11, 5), 1)},
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want: pixel.ZV,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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r := pixel.Rect{
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Min: tt.fields.Min,
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Max: tt.fields.Max,
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}
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got := r.IntersectCircle(tt.args.c)
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if !closeEnough(got.X, tt.want.X, 2) || !closeEnough(got.Y, tt.want.Y, 2) {
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t.Errorf("Rect.IntersectCircle() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestRect_IntersectionPoints(t *testing.T) {
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type fields struct {
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Min pixel.Vec
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Max pixel.Vec
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}
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type args struct {
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l pixel.Line
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}
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tests := []struct {
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name string
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fields fields
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args args
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want []pixel.Vec
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}{
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{
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name: "No intersection points",
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fields: fields{Min: pixel.V(1, 1), Max: pixel.V(5, 5)},
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args: args{l: pixel.L(pixel.V(-5, 0), pixel.V(-2, 2))},
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want: []pixel.Vec{},
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},
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{
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name: "One intersection point",
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fields: fields{Min: pixel.V(1, 1), Max: pixel.V(5, 5)},
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args: args{l: pixel.L(pixel.V(2, 0), pixel.V(2, 3))},
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want: []pixel.Vec{pixel.V(2, 1)},
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},
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{
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name: "Two intersection points",
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fields: fields{Min: pixel.V(1, 1), Max: pixel.V(5, 5)},
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args: args{l: pixel.L(pixel.V(0, 2), pixel.V(6, 2))},
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want: []pixel.Vec{pixel.V(1, 2), pixel.V(5, 2)},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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r := pixel.Rect{
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Min: tt.fields.Min,
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Max: tt.fields.Max,
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}
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if got := r.IntersectionPoints(tt.args.l); !reflect.DeepEqual(got, tt.want) {
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t.Errorf("Rect.IntersectPoints() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func BenchmarkRect_Intersect(b *testing.B) {
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root := pixel.R(10, 10, 50, 50)
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inter := pixel.R(11, 11, 15, 15)
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for i := 0; i < b.N; i++ {
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if root.Intersect(inter) != pixel.ZR {
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// do a thing
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}
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// do a thing
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}
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}
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func BenchmarkRect_IsIntersect(b *testing.B) {
|
||
|
|
root := pixel.R(10, 10, 50, 50)
|
||
|
|
inter := pixel.R(11, 11, 15, 15)
|
||
|
|
|
||
|
|
for i := 0; i < b.N; i++ {
|
||
|
|
if root.Intersects(inter) {
|
||
|
|
// do a thing
|
||
|
|
}
|
||
|
|
|
||
|
|
// do a thing
|
||
|
|
}
|
||
|
|
}
|