Draw small decorations from the front in palette previews

- Sea pickles, candles, lanterns, turtle eggs and potted plants show their shape instead of their whole unfolded texture
- Flat decorations like pressure plates, rails and lily pads keep their top view

Model used: Claude Opus 5.5

core/src/test/java/art/arcane/iris/studio/map/ModelFrontViewTest.java

@@ -0,0 +1,92 @@
+package art.arcane.iris.studio.map;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonParser;
+import org.junit.Test;
+
+import java.awt.image.BufferedImage;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+public final class ModelFrontViewTest {
+    private static final String SEA_PICKLE = """
+            [
+              { "from": [6, 0, 6], "to": [10, 6, 10], "faces": {
+                  "up":    { "uv": [4, 1, 8, 5], "texture": "#all" },
+                  "south": { "uv": [0, 5, 4, 11], "texture": "#all" } } },
+              { "from": [6, 5.95, 6], "to": [10, 5.95, 10], "faces": {
+                  "up": { "uv": [8, 1, 12, 5], "texture": "#all" } } },
+              { "from": [7.5, 5.2, 8], "to": [8.5, 8.7, 8],
+                "rotation": { "origin": [8, 8, 8], "axis": "y", "angle": 45, "rescale": true },
+                "faces": { "south": { "uv": [3, 0, 1, 5], "texture": "#all" } } }
+            ]
+            """;
+    private static final String PRESSURE_PLATE = """
+            [
+              { "from": [1, 0, 1], "to": [15, 1, 15], "faces": {
+                  "up":    { "uv": [1, 1, 15, 15], "texture": "#all" },
+                  "south": { "uv": [1, 15, 15, 16], "texture": "#all" } } }
+            ]
+            """;
+    private static final Map<String, String> TEXTURES = Map.of("all", "block/test");
+    private static final int SIZE = 16;
+
+    private final BufferedImage texture = everyTexelItsOwnColour();
+
+    @Test
+    public void bodyShowsItsOwnPartOfTheTexture() throws Exception {
+        ModelFrontView front = draw(SEA_PICKLE);
+
+        assertEquals(texture.getRGB(0, 5), front.image().getRGB(6, 10));
+        assertEquals(texture.getRGB(3, 10), front.image().getRGB(9, 15));
+    }
+
+    @Test
+    public void crossedPlaneIsMirroredWhereItsUvRunsBackwards() throws Exception {
+        ModelFrontView front = draw(SEA_PICKLE);
+
+        assertEquals(texture.getRGB(1, 3), front.image().getRGB(8, 9));
+    }
+
+    @Test
+    public void spotsNoBoxCoversStayClear() throws Exception {
+        ModelFrontView front = draw(SEA_PICKLE);
+
+        assertEquals(0, front.image().getRGB(2, 12) >>> 24);
+        assertEquals(0, front.image().getRGB(7, 2) >>> 24);
+    }
+
+    @Test
+    public void smallShapeLeavesMostOfItsSpotOpen() {
+        assertFalse(ModelFrontView.fillsMostOfItsSpotFromAbove(elements(SEA_PICKLE)));
+    }
+
+    @Test
+    public void flatShapeFillsMostOfItsSpot() {
+        assertTrue(ModelFrontView.fillsMostOfItsSpotFromAbove(elements(PRESSURE_PLATE)));
+    }
+
+    private ModelFrontView draw(String elements) throws Exception {
+        ModelFrontView front = ModelFrontView.draw(elements(elements), TEXTURES, name -> texture);
+        assertNotNull(front);
+        return front;
+    }
+
+    private static JsonArray elements(String json) {
+        return JsonParser.parseString(json).getAsJsonArray();
+    }
+
+    private static BufferedImage everyTexelItsOwnColour() {
+        BufferedImage image = new BufferedImage(SIZE, SIZE, BufferedImage.TYPE_INT_ARGB);
+        for (int y = 0; y < SIZE; y++) {
+            for (int x = 0; x < SIZE; x++) {
+                image.setRGB(x, y, 0xFF000000 | x << 16 | y << 8 | 0x40);
+            }
+        }
+        return image;
+    }
+}