Updated firing pattern plot

nengo_gui/components/__init__.py

@@ -9,6 +9,7 @@
 from .netgraph import NetGraph
 from .ace_editor import AceEditor
 from .htmlview import HTMLView
+from .spike_grid import SpikeGrid
 
 # Old versions of the .cfg files used Templates which had slightly different
 # names than the Components currently use.  This code allows us to

nengo_gui/components/netgraph.py

@@ -468,6 +468,7 @@ def get_extra_info(self, obj):
             info['dimensions'] = int(obj.size_out)
         elif isinstance(obj, nengo.Ensemble):
             info['dimensions'] = int(obj.size_out)
+            info['n_neurons'] = int(obj.n_neurons)
         info['sp_targets'] = (
             nengo_gui.components.pointer.Pointer.applicable_targets(obj))
         return info

nengo_gui/components/spike_grid.py

@@ -0,0 +1,73 @@
+import nengo
+import numpy as np
+import struct
+
+from nengo_gui.components.component import Component
+
+class SpikeGrid(Component):
+    def __init__(self, obj, n_neurons=None):
+        super(SpikeGrid, self).__init__()
+        self.obj = obj
+        self.data = []
+        self.max_neurons = self.obj.neurons.size_out
+        if n_neurons is None:
+            n_neurons = self.max_neurons
+        self.n_neurons = n_neurons
+        self.pixels_x = np.ceil(np.sqrt(self.n_neurons))
+        self.pixels_y = np.ceil(float(self.n_neurons) / self.pixels_x)
+        self.n_pixels = self.pixels_x * self.pixels_y
+        self.struct = struct.Struct('<f%dB' % (self.n_pixels))
+        self.max_value = 1.0
+
+    def attach(self, page, config, uid):
+        super(SpikeGrid, self).attach(page, config, uid)
+        self.label = page.get_label(self.obj)
+
+    def add_nengo_objects(self, page):
+        with page.model:
+            self.node = nengo.Node(self.gather_data,
+                                   size_in=self.obj.neurons.size_out)
+            self.conn = nengo.Connection(self.obj.neurons,
+                                         self.node, synapse=0.01)
+
+    def remove_nengo_objects(self, page):
+        page.model.connections.remove(self.conn)
+        page.model.nodes.remove(self.node)
+
+    def gather_data(self, t, x):
+        self.max_value = max(self.max_value, np.max(x))
+
+        # TODO: pass only spiking neurons, using subclass of Nengo.Image?
+        #   Considerations include how to filter if we're only passing spike
+        #   times, i.e. need to write a new DataStore.
+        if len(x) > self.n_neurons:
+            x = x[:self.n_neurons]
+        y = np.zeros(self.n_pixels, dtype=np.uint8)
+        if self.max_value > 0:
+            y[:x.size] = x * 255 / self.max_value
+        data = self.struct.pack(t, *y)
+        self.data.append(data)
+
+    def update_client(self, client):
+        length = len(self.data)
+        if length > 0:
+            item = bytes().join(self.data[:length])
+            del self.data[:length]
+            try:
+                client.write(item, binary=True)
+            except:
+                # if there is a communication problem, just drop the frame
+                # (this usually happens when there is too much data to send)
+                pass
+
+    def javascript(self):
+        info = dict(uid=id(self), label=self.label,
+                    pixels_x=self.pixels_x, pixels_y=self.pixels_y)
+        json = self.javascript_config(info)
+        return 'new Nengo.Image(main, sim, %s);' % json
+
+    def code_python_args(self, uids):
+        args = [uids[self.obj]]
+        if self.n_neurons != self.max_neurons:
+            args.append('n_neurons=%d' % self.n_neurons)
+        return args

nengo_gui/static/components/image.js

@@ -0,0 +1,123 @@
+/**
+ * Shows an image or pixel grid over time
+ * @constructor
+ *
+ * @param {dict} args - A set of constructor arguments (see Nengo.Component)
+ * @param {int} args.n_lines - number of decoded values
+ * @param {float} args.miny - minimum value on y-axis
+ * @param {float} args.maxy - maximum value on y-axis
+ * @param {Nengo.SimControl} args.sim - the simulation controller
+ */
+
+Nengo.Image = function(parent, sim, args) {
+    var self = this;
+
+    Nengo.Component.call(self, parent, args);
+    self.sim = sim;
+    self.display_time = args.display_time;
+    self.pixels_x = args.pixels_x;
+    self.pixels_y = args.pixels_y;
+    self.n_pixels = self.pixels_x * self.pixels_y;
+
+    /** for storing the accumulated data */
+    self.data_store = new Nengo.DataStore(self.n_pixels, self.sim, 0);
+
+    /** draw the plot as an SVG */
+    self.svg = d3.select(self.div).append('svg')
+        .attr('width', '100%')
+        .attr('height', '100%')
+        .attr('style', [
+            'padding-top:', '2em',
+        ].join(""));
+
+    /** call schedule_update whenever the time is adjusted in the SimControl */
+    self.sim.div.addEventListener('adjust_time',
+            function(e) {self.schedule_update();}, false);
+
+    /** create the image */
+    self.image = self.svg.append("image")
+        .attr("x", 0)
+        .attr("y", 0)
+        .attr("width", "100%")
+        .attr("height", "100%")
+        .attr("style", [
+            "image-rendering: -webkit-optimize-contrast;",
+            "image-rendering: -moz-crisp-edges;",
+            "image-rendering: pixelated;"
+        ].join(""));
+
+    self.canvas = document.createElement('CANVAS');
+    self.canvas.width = self.pixels_x;
+    self.canvas.height = self.pixels_y;
+
+    self.on_resize(this.get_screen_width(), this.get_screen_height());
+
+};
+Nengo.Image.prototype = Object.create(Nengo.Component.prototype);
+Nengo.Image.prototype.constructor = Nengo.Image;
+
+/**
+ * Receive new line data from the server
+ */
+Nengo.Image.prototype.on_message = function(event) {
+    var data = new Uint8Array(event.data);
+    var msg_size = this.n_pixels + 4;
+
+    for (var i = 0; i < data.length; i += msg_size) {
+        var time_data = new Float32Array(event.data.slice(i, i + 4));
+        data = Array.prototype.slice.call(data, i + 3, i + msg_size);
+        data[0] = time_data[0];
+        this.data_store.push(data);
+    }
+    this.schedule_update();
+}
+
+/**
+ * Redraw the lines and axis due to changed data
+ */
+Nengo.Image.prototype.update = function() {
+    var self = this;
+
+    /** let the data store clear out old values */
+    self.data_store.update();
+
+    var data = self.data_store.get_last_data();
+    var ctx = self.canvas.getContext("2d");
+    var imgData = ctx.getImageData(0, 0, self.pixels_x, self.pixels_y);
+    for (var i = 0; i < self.n_pixels; i++) {
+        imgData.data[4*i + 0] = data[i];
+        imgData.data[4*i + 1] = data[i];
+        imgData.data[4*i + 2] = data[i];
+        imgData.data[4*i + 3] = 255;
+    }
+    ctx.putImageData(imgData, 0, 0);
+    var dataURL = self.canvas.toDataURL("image/png");
+
+    self.image.attr("xlink:href", dataURL);
+};
+
+/**
+ * Adjust the graph layout due to changed size
+ */
+Nengo.Image.prototype.on_resize = function(width, height) {
+    var self = this;
+    if (width < self.minWidth) {
+        width = self.minWidth;
+    }
+    if (height < self.minHeight) {
+        height = self.minHeight;
+    };
+
+    self.svg
+        .attr("width", width)
+        .attr("height", height);
+
+    self.update();
+
+    self.label.style.width = width;
+
+    self.width = width;
+    self.height = height;
+    self.div.style.width = width;
+    self.div.style.height = height;
+};

nengo_gui/static/components/netgraph_item.js

@@ -336,30 +336,31 @@ Nengo.NetGraphItem.prototype.generate_menu = function () {
         }
     }
     if (this.type == 'ens') {
-        items.push(['Value', function() {self.create_graph('Value');}])
+        items.push(['Value', function() {self.create_graph('Value');}]);
         if (this.dimensions > 1) {
-            items.push(['XY-value', function() {self.create_graph('XYValue');}])
+            items.push(['XY-value', function() {self.create_graph('XYValue');}]);
         }
-        items.push(['Spikes', function() {self.create_graph('Raster');}])
-        items.push(['Voltages', function() {self.create_graph('Voltage');}])
+        items.push(['Spikes', function() {self.create_graph('Raster');}]);
+        items.push(['Voltages', function() {self.create_graph('Voltage');}]);
+        items.push(['Firing pattern', function() {self.create_graph('SpikeGrid');}]);
     }
     if (this.type == 'node') {
-        items.push(['Slider', function() {self.create_graph('Slider');}])
+        items.push(['Slider', function() {self.create_graph('Slider');}]);
         if (this.dimensions > 0) {
-            items.push(['Value', function() {self.create_graph('Value');}])
+            items.push(['Value', function() {self.create_graph('Value');}]);
         }
         if (this.dimensions > 1) {
-            items.push(['XY-value', function() {self.create_graph('XYValue');}])
+            items.push(['XY-value', function() {self.create_graph('XYValue');}]);
         }
         if (this.html_node) {
             items.push(['HTML', function() {self.create_graph('HTMLView');}])
         }
     }
     if (this.sp_targets.length > 0) {
         items.push(['Semantic pointer',
-                    function() {self.create_graph('Pointer', self.sp_targets[0]);}])
+                    function() {self.create_graph('Pointer', self.sp_targets[0]);}]);
     }
-    items.push(['Details ...', function() {self.create_modal();}])
+    items.push(['Details ...', function() {self.create_modal();}]);
     return items;
 };
 
@@ -644,7 +645,6 @@ Nengo.NetGraphItem.prototype.redraw_child_connections = function() {
 };
 
 
-
 Nengo.NetGraphItem.prototype.redraw_connections = function() {
     /** update any connections into and out of this */
     for (var i in this.conn_in) {
@@ -779,7 +779,6 @@ Nengo.NetGraphItem.prototype.get_height = function() {
 }
 
 
-
 /** force a redraw of the item */
 Nengo.NetGraphItem.prototype.redraw = function() {
     this.set_position(this.pos[0], this.pos[1]);

nengo_gui/templates/page.html

@@ -129,6 +129,7 @@ <h4 class="modal-title"></h4>
         <script src="static/components/netgraph.js"></script>
         <script src="static/components/netgraph_item.js"></script>
         <script src="static/components/netgraph_conn.js"></script>
+        <script src="static/components/image.js"></script>
         <script src="static/sim_control.js"></script>
         <script src="static/top_toolbar.js"></script>
         <script src="static/modal.js"></script>