examples(orthographic camera): add examples of PlanarView with an ort…

…hographic camera
iTowns · Jan 18, 2021 · d58c1b6 · d58c1b6
1 parent 05fb79f
commit d58c1b6
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Showing 3 changed files with 103 additions and 9 deletions.
diff --git a/examples/config.json b/examples/config.json
@@ -55,7 +55,8 @@
         "misc_clamp_ground": "Clamp 3d object to ground",
         "misc_camera_animation": "Camera animation",
         "misc_compare_25d_3d": "Compare 2.5D and 3D maps",
-        "misc_georeferenced_images": "Georeferenced image"
+        "misc_georeferenced_images": "Georeferenced image",
+        "misc_orthographic_camera": "Orthographic camera"
     },
 
     "Plugins": {

diff --git a/examples/misc_orthographic_camera.html b/examples/misc_orthographic_camera.html
@@ -0,0 +1,98 @@
+<html lang="en">
+    <head>
+        <meta charset="UTF-8">
+        <title>Title</title>
+
+        <link rel="stylesheet" type="text/css" href="css/example.css">
+        <link rel="stylesheet" type="text/css" href="css/LoadingScreen.css">
+
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.7.6/dat.gui.min.js"></script>
+    </head>
+    <body>
+        <div id="description">
+            Key bindings
+            <ul>
+                <li>Left-Click : camera translation (drag)</li>
+                <li>Spacebar / Wheel-Click : smart travel</li>
+                <li>Mouse Wheel : zoom in/out</li>
+                <li>Y : move camera to start position</li>
+            </ul>
+        </div>
+        <div id="viewerDiv"></div>
+        <span id="divScaleWidget"> Scale </span>
+
+        <script src="../dist/itowns.js"></script>
+        <script src="../dist/debug.js"></script>
+        <script src="js/GUI/LoadingScreen.js"></script>
+        <script src="js/GUI/GuiTools.js"></script>
+        <script src="js/Scale.js"></script>
+        <script type="text/javascript">
+        /* global itowns, setupLoadingScreen, GuiTools, debug */
+
+            itowns.proj4.defs(
+                'EPSG:3946',
+                '+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 ' +
+                '+towgs84=0,0,0,0,0,0,0 +units=m +no_defs'
+            );
+
+            // define geographic extent : CRS, min/max X, min/max Y
+            const extent = new itowns.Extent(
+                'EPSG:3946',
+                1837816.94334, 1847692.32501,
+                5170036.45870, 5178412.82698,
+            );
+
+            // `viewerDiv` will contain iTowns' rendering area (`<canvas>`)
+            const viewerDiv = document.getElementById('viewerDiv');
+
+            // instantiate PlanarView with an orthographic camera
+            const view = new itowns.PlanarView(viewerDiv, extent, {
+                cameraType: itowns.CAMERA_TYPE.ORTHOGRAPHIC,
+            });
+            setupLoadingScreen(viewerDiv, view);
+
+            // add a WMS imagery source
+            const wmsImagerySource = new itowns.WMSSource({
+                extent: extent,
+                name: 'Ortho2009_vue_ensemble_16cm_CC46',
+                url: 'https://download.data.grandlyon.com/wms/grandlyon',
+                version: '1.3.0',
+                crs: 'EPSG:3946',
+                format: 'image/jpeg',
+            });
+            // add a WMS imagery layer
+            const wmsImageryLayer = new itowns.ColorLayer('wms_imagery', {
+                source: wmsImagerySource,
+            });
+            view.addLayer(wmsImageryLayer);
+
+            // Initialize scale :
+            const initialScaleSize = 200;  // in pixel
+            const divScaleWidget = document.getElementById('divScaleWidget');
+            function updateScaleWidget() {
+                let computedScale = roundPixelsFromMeters(view, initialScaleSize);
+                let format = getMetersUnit(computedScale.meters);
+                divScaleWidget.innerHTML = `${format.distance} ${format.unit}`;
+                divScaleWidget.style.width = `${computedScale.pixels}`;
+            }
+            // Updates scale when needed :
+            view.addEventListener(itowns.VIEW_EVENTS.INITIALIZED, function () {
+                // eslint-disable-next-line no-console
+                console.info('View initialized');
+                updateScaleWidget();
+            });
+            view.addEventListener(itowns.PLANAR_CONTROL_EVENT.MOVED, function () {
+                updateScaleWidget();
+            })
+            // request redraw
+            view.notifyChange();
+
+            // add `Controls` menu
+            if (view.isDebugMode) {
+                const menu = new GuiTools('menuDiv', view);
+                debug.createTileDebugUI(menu.gui, view);
+            }
+        </script>
+    </body>
+</html>
diff --git a/examples/view_2d_map.html b/examples/view_2d_map.html
@@ -30,17 +30,12 @@
             // Instanciate PlanarView
             // By default itowns' tiles geometry have a "skirt" (ie they have a height),
             // but in case of orthographic we don't need this feature, so disable it
-            var view = new itowns.PlanarView(viewerDiv, extent, { disableSkirt: true, maxSubdivisionLevel: 10, placement: { tilt: 90 },
+            var view = new itowns.PlanarView(viewerDiv, extent, { disableSkirt: true, maxSubdivisionLevel: 10,
+                cameraType: itowns.CAMERA_TYPE.ORTHOGRAPHIC,
                 controls: {
-                    // We do not want the user to zoom out too much
-                    maxAltitude: 40000000,
-                    // We want to keep the rotation disabled, to only have a view from the top
-                    enableRotation: false,
                     // Faster zoom in/out speed
-                    zoomInFactor: 0.5,
+                    zoomInFactor: 1,
                     zoomOutFactor: 0.5,
-                    // Don't zoom too much on smart zoom
-                    smartZoomHeightMax: 100000,
                 },
             });