Add basic plotter for WebGL
There're still a bunch of TODOs. Will address those when we actually
have a need for this.
Change-Id: I137390d384967ffb618e0ecda37503e1e0df8301
diff --git a/build_tests/minimal_shell.html b/build_tests/minimal_shell.html
index 6158571..c9d2b86 100644
--- a/build_tests/minimal_shell.html
+++ b/build_tests/minimal_shell.html
@@ -56,7 +56,21 @@
</div>
<!--The width and height values in the canvas specify the pixel width/height for the WebGL canvas.
The actual on-screen size is controlled by the stylesheet.-->
- <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" width=3000 height=2000></canvas>
+ <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()" width=1200 height=600></canvas>
+
+ <div>
+ General help information:<br>
+ <ul>
+ <li>Double-click to reset zoom.</li>
+ <li>Left-click to print mouse position (within plot) to console.</li>
+ <li>Ctrl-Z to undo zoom actions.</li>
+ <li>Right-click and drag to pan.</li>
+ <li>Left-click and drag zooms to the dragged area. If you press Escape while dragging, it will cancel the zoom.</li>
+ <li>Scroll up/down will zoom in and out.</li>
+ <li>Holding down "x" and "y" will restrict any
+ movement to the x and y axes respectively.</li>
+ </ul>
+ </div>
<script type='text/javascript'>
var statusElement = document.getElementById('status');