From f039f98b612835622d979e63d8cbfb154faff153 Mon Sep 17 00:00:00 2001
From: Trent Larson <trent@trentlarson.com>
Date: Thu, 18 May 2023 18:04:10 -0600
Subject: [PATCH] on stats-world: adjust some lighting and position, and add an
 attempt at a screen-capture

---
 project.yaml                              |  2 +-
 src/components/World/World.js             |  2 +-
 src/components/World/components/camera.js |  2 +-
 src/components/World/components/lights.js |  2 +-
 src/components/World/systems/controls.js  |  2 +
 src/views/StatisticsView.vue              | 98 ++++++++++++++++++++++-
 6 files changed, 102 insertions(+), 6 deletions(-)

diff --git a/project.yaml b/project.yaml
index d7936ec..2931bb7 100644
--- a/project.yaml
+++ b/project.yaml
@@ -39,7 +39,7 @@
 - .5 make advanced features harder to access
 
 - Release Minimum Viable Product :
-  - Turn off stats-world or ensure it's usable (eg. cannot zoom out too far and lose world).
+  - Turn off stats-world or ensure it's usable (eg. cannot zoom out too far and lose world, cannot screenshot).
 
 - Stats :
   - 01 point out user's location on the world
diff --git a/src/components/World/World.js b/src/components/World/World.js
index 5a602c9..154244e 100644
--- a/src/components/World/World.js
+++ b/src/components/World/World.js
@@ -47,7 +47,7 @@ class World {
     this.lights = [];
     this.bushes = [];
 
-    // Initializae Loop
+    // Initialize Loop
     this.loop = new Loop(this.camera, this.scene, this.renderer);
 
     container.append(this.renderer.domElement);
diff --git a/src/components/World/components/camera.js b/src/components/World/components/camera.js
index 7eac6c5..e561cc5 100644
--- a/src/components/World/components/camera.js
+++ b/src/components/World/components/camera.js
@@ -5,7 +5,7 @@ function createCamera() {
     35, // fov = Field Of View
     1, // aspect ratio (dummy value)
     0.1, // near clipping plane
-    300 // far clipping plane
+    350 // far clipping plane
   );
 
   // move the camera back so we can view the scene
diff --git a/src/components/World/components/lights.js b/src/components/World/components/lights.js
index bcc38fb..8071335 100644
--- a/src/components/World/components/lights.js
+++ b/src/components/World/components/lights.js
@@ -3,7 +3,7 @@ import { DirectionalLight, DirectionalLightHelper } from "three";
 function createLights(color) {
   const light = new DirectionalLight(color, 4);
   const lightHelper = new DirectionalLightHelper(light, 0);
-  light.position.set(60, 60, 30);
+  light.position.set(60, 100, 30);
 
   // eslint-disable-next-line @typescript-eslint/no-empty-function
   light.tick = () => {};
diff --git a/src/components/World/systems/controls.js b/src/components/World/systems/controls.js
index 7ffa178..310b7b0 100644
--- a/src/components/World/systems/controls.js
+++ b/src/components/World/systems/controls.js
@@ -26,6 +26,8 @@ function createControls(camera, canvas) {
   controls.enableDamping = true;
 
   //controls.enableZoom = false;
+  controls.maxDistance = 250;
+
   //controls.enablePan = false;
 
   controls.tick = () => controls.update();
diff --git a/src/views/StatisticsView.vue b/src/views/StatisticsView.vue
index 34c41fb..e1281c9 100644
--- a/src/views/StatisticsView.vue
+++ b/src/views/StatisticsView.vue
@@ -54,21 +54,115 @@
       Your Statistics
     </h1>
 
+    <button class="float-right" @click="captureGraphics()">Screenshot</button>
+
     <!-- Another place to play with the sizing is in Resizer.setSize -->
     <div id="scene-container" class="h-screen"></div>
   </section>
 </template>
 
 <script lang="ts">
+import { SVGRenderer } from "three/addons/renderers/SVGRenderer.js";
 import { Component, Vue } from "vue-facing-decorator";
 import { World } from "@/components/World/World.js";
 
 @Component
 export default class StatisticsView extends Vue {
+  world: World;
+
   mounted() {
     const container = document.querySelector("#scene-container");
-    const world = new World(container);
-    world.start();
+    const newWorld = new World(container);
+    newWorld.start();
+    this.world = newWorld;
   }
+
+  public captureGraphics() {
+    /**
+    // from https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob#examples
+    // Adds a blank image
+    const dataBlob = document
+      .querySelector("#scene-container")
+      .firstChild.toBlob((blob) => {
+        const newImg = document.createElement("img");
+        const url = URL.createObjectURL(blob);
+
+        newImg.onload = () => {
+          // no longer need to read the blob so it's revoked
+          URL.revokeObjectURL(url);
+        };
+
+        newImg.src = url;
+        document.body.appendChild(newImg);
+      });
+     **/
+
+    /**
+    // Yields a blank page with the iframe below
+    const dataUrl = document
+      .querySelector("#scene-container")
+      .firstChild.toDataURL("image/png");
+     **/
+
+    /**
+    // Yields a blank page with the iframe below
+    const dataUrl = this.world.renderer.domElement.toDataURL("image/png");
+     **/
+
+    /**
+    // Show the image in a new tab
+    const iframe = `
+      <iframe
+        src="${dataUrl}"
+        frameborder="0"
+        style="border:0; top:0px; left:0px; bottom:0px; right:0px; width:100%; height:100%;"
+        allowfullscreen>
+      </iframe>`;
+    const win = window.open();
+    win.document.open();
+    win.document.write(iframe);
+    win.document.close();
+     **/
+
+    // from https://stackoverflow.com/a/17407392/845494
+    // This yields a file with funny formatting.
+    //const image = const dataUrl.replace("image/png", "image/octet-stream");
+
+    /**
+    // Yields a blank image at the bottom of the page
+    // from https://discourse.threejs.org/t/save-screenshot-on-server/39900/3
+    const img = new Image();
+    img.src = this.world.renderer.domElement.toDataURL();
+    document.body.appendChild(img);
+     **/
+
+    /**
+     * This yields an SVG that only shows white and black highlights
+     // from https://stackoverflow.com/questions/27632621/exporting-from-three-js-scene-to-svg-or-other-vector-format
+     **/
+    const rendererSVG = new SVGRenderer();
+    rendererSVG.setSize(window.innerWidth, window.innerHeight);
+    rendererSVG.render(this.world.scene, this.world.camera);
+    //document.body.appendChild(rendererSVG.domElement);
+    ExportToSVG(rendererSVG, "test.svg");
+  }
+}
+
+function ExportToSVG(rendererSVG, filename) {
+  const XMLS = new XMLSerializer();
+  const svgfile = XMLS.serializeToString(rendererSVG.domElement);
+  const svgData = svgfile;
+  const preface = '<?xml version="1.0" standalone="no"?>\r\n';
+  const svgBlob = new Blob([preface, svgData], {
+    type: "image/svg+xml;charset=utf-8",
+  });
+  const svgUrl = URL.createObjectURL(svgBlob);
+  const downloadLink = document.createElement("a");
+
+  downloadLink.href = svgUrl;
+  downloadLink.download = filename;
+  document.body.appendChild(downloadLink);
+  downloadLink.click();
+  document.body.removeChild(downloadLink);
 }
 </script>