ui: basic map scroller

2026-03-06 23:29:06 +02:00
parent 29d188969b
commit 1de621c743
68 changed files with 9861 additions and 118 deletions
@@ -0,0 +1,99 @@
+package world
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPoints_WrapCopies_AppearInsideViewportWhenViewportEqualsWorld(t *testing.T) {
+	t.Parallel()
+
+	params := RenderParams{
+		ViewportWidthPx:  10,
+		ViewportHeightPx: 10,
+		MarginXPx:        0,
+		MarginYPx:        0,
+		CameraXWorldFp:   5 * SCALE,
+		CameraYWorldFp:   5 * SCALE,
+		CameraZoom:       1.0,
+		Options: &RenderOptions{
+			Style: func() *RenderStyle {
+				s := DefaultRenderStyle()
+				s.PointRadiusPx = 2.0 // so that a point at 9 "spills" by 1 and needs a copy at -1
+				return &s
+			}(),
+		},
+	}
+
+	type tc struct {
+		name        string
+		x, y        float64
+		wantCenters [][2]float64
+	}
+
+	tests := []tc{
+		{
+			name:        "bottom boundary wraps to top",
+			x:           5,
+			y:           9,
+			wantCenters: [][2]float64{{5, 9}, {5, -1}},
+		},
+		{
+			name:        "right boundary wraps to left",
+			x:           9,
+			y:           5,
+			wantCenters: [][2]float64{{9, 5}, {-1, 5}},
+		},
+		{
+			name:        "corner wraps to three extra copies",
+			x:           9,
+			y:           9,
+			wantCenters: [][2]float64{{9, 9}, {9, -1}, {-1, 9}, {-1, -1}},
+		},
+		{
+			name:        "no wrap inside",
+			x:           5,
+			y:           5,
+			wantCenters: [][2]float64{{5, 5}},
+		},
+	}
+
+	for _, tt := range tests {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			w := NewWorld(10, 10)
+			w.resetGrid(2 * SCALE)
+
+			_, err := w.AddPoint(tt.x, tt.y)
+			require.NoError(t, err)
+
+			for _, obj := range w.objects {
+				w.indexObject(obj)
+			}
+
+			plan, err := w.buildRenderPlanStageA(params)
+			require.NoError(t, err)
+
+			d := &fakePrimitiveDrawer{}
+			style := DefaultRenderStyle()
+			style.PointRadiusPx = 2.0
+
+			applyPointStyle(d, style)
+			drawPointsFromPlanWithRadius(d, plan, w.W, w.H, style.PointRadiusPx)
+
+			cmds := d.CommandsByName("AddPoint")
+			require.Len(t, cmds, len(tt.wantCenters))
+
+			got := make([][2]float64, 0, len(cmds))
+			for _, c := range cmds {
+				require.Len(t, c.Args, 3)
+				got = append(got, [2]float64{c.Args[0], c.Args[1]})
+			}
+
+			require.ElementsMatch(t, tt.wantCenters, got)
+		})
+	}
+}