themes and styles

client/world/circle_radius_scale_test.go

@@ -0,0 +1,50 @@
+package world
+
+import (
+	"image/color"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestRender_CircleRadiusScale_AffectsRenderedRadiusPx(t *testing.T) {
+	t.Parallel()
+
+	w := NewWorld(10, 10)
+	w.resetGrid(2 * SCALE)
+
+	// Ensure index state is initialized so Add triggers rebuild if needed.
+	w.IndexOnViewportChange(10, 10, 1.0)
+
+	_, err := w.AddCircle(5, 5, 2) // raw radius = 2 units
+	require.NoError(t, err)
+
+	// scale = 2.0
+	require.NoError(t, w.SetCircleRadiusScaleFp(2*SCALE))
+
+	// Reindex explicitly (safe).
+	w.Reindex()
+
+	params := RenderParams{
+		ViewportWidthPx:  10,
+		ViewportHeightPx: 10,
+		MarginXPx:        0,
+		MarginYPx:        0,
+		CameraXWorldFp:   5 * SCALE,
+		CameraYWorldFp:   5 * SCALE,
+		CameraZoom:       1.0,
+		Options: &RenderOptions{
+			BackgroundColor: color.RGBA{A: 255},
+		},
+	}
+
+	d := &fakePrimitiveDrawer{}
+	require.NoError(t, w.Render(d, params))
+
+	circles := d.CommandsByName("AddCircle")
+	require.NotEmpty(t, circles)
+
+	// AddCircle args: cx, cy, rPx
+	rPx := circles[0].Args[2]
+	require.Equal(t, float64(4), rPx, "raw radius=2 with scale=2 => eff radius=4 => rPx=4 at zoom=1")
+}