126 lines
2.0 KiB
Go
126 lines
2.0 KiB
Go
package collision_test
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import (
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"testing"
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"git.kirsle.net/go/render"
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"git.kirsle.net/apps/doodle/pkg/collision"
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)
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func TestActorCollision(t *testing.T) {
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boxes := []render.Rect{
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// 0: intersects with 1
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// Expected intersection rect would be
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// X,Y = 90,10
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// X2,Y2 = 100,99
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render.Rect{
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X: 0,
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Y: 0,
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W: 100,
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H: 100,
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},
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// 1: intersects with 0
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// Expected intersection rect would be
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// X,Y = 90,10
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// X2,Y2 = 100,99
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render.Rect{
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X: 90,
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Y: 10,
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W: 100,
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H: 100,
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},
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// 2: no intersection
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render.Rect{
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X: 200,
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Y: 200,
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W: 32,
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H: 32,
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},
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// 3: intersects with 4
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// Expected intersection rect would be
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// X,Y = 240,200
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// X2,Y2 = 264,231
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render.Rect{
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X: 233,
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Y: 200,
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W: 32,
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H: 32,
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},
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// 4: intersects with 3
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render.Rect{
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X: 240,
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Y: 200,
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W: 32,
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H: 32,
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},
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// 5: completely contains 6 and intersects 7.
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render.Rect{
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X: 300,
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Y: 300,
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W: 1000,
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H: 600,
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},
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render.Rect{
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X: 450,
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Y: 500,
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W: 42,
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H: 42,
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},
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render.Rect{
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X: 1200,
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Y: 350,
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W: 512,
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H: 512,
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},
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}
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assert := func(i int, result collision.BoxCollision, expectA, expectB int) {
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if result.A != expectA || result.B != expectB {
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t.Errorf(
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"unexpected collision at index %d of BetweenBoxes() generator\n"+
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"expected: (%d,%d)\n"+
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" but got: (%d,%d)",
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i,
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expectA, expectB,
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result.A, result.B,
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)
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}
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}
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var i int
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for overlap := range collision.BetweenBoxes(boxes) {
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a, b := overlap.A, overlap.B
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// Ensure expected collisions happened.
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switch i {
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case 0:
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assert(i, overlap, 0, 1)
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case 1:
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assert(i, overlap, 1, 0)
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case 2:
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assert(i, overlap, 3, 4)
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case 3:
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assert(i, overlap, 4, 3)
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case 4:
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assert(i, overlap, 5, 6)
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case 5:
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assert(i, overlap, 5, 7)
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case 6:
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assert(i, overlap, 6, 5)
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case 7:
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assert(i, overlap, 7, 5)
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default:
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t.Errorf("got unexpected collision result, index %d, tuple (%d,%d)",
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i, a, b,
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)
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}
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i++
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}
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}
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