added help and description to nodes

src/dsp/mod.rs

@@ -965,6 +965,8 @@ macro_rules! make_node_info_enum {
                     outputs:        Vec<&'static str>,
                     input_help:     Vec<&'static str>,
                     output_help:    Vec<&'static str>,
+                    node_help:      &'static str,
+                    node_desc:      &'static str,
                 }
 
                 impl $variant {
@@ -980,6 +982,8 @@ macro_rules! make_node_info_enum {
 
                             input_help,
                             output_help: vec![$(crate::dsp::$variant::$out,)*],
+                            node_help:   crate::dsp::$variant::HELP,
+                            node_desc:   crate::dsp::$variant::DESC,
                         }
                     }
 

src/dsp/node_amp.rs

@@ -22,6 +22,9 @@ pub struct Amp {
 }
 
 impl Amp {
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
+
     pub fn new(_nid: &NodeId) -> Self {
         Self {
         }

src/dsp/node_fbwr_fbrd.rs

@@ -19,6 +19,9 @@ impl FbWr {
     }
     pub const inp : &'static str =
         "FbWr inp\nSignal input\nRange: (-1..1)\n";
+
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
 }
 
 impl DspNode for FbWr {
@@ -64,6 +67,9 @@ impl FbRd {
          Use this to adjust the feedback amount.\nRange: (0..1)\n";
     pub const sig : &'static str =
         "FbRd sig\nFeedback signal output.\nRange: (-1..1)\n";
+
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
 }
 
 impl DspNode for FbRd {

src/dsp/node_out.rs

@@ -53,6 +53,9 @@ impl Out {
     pub const ch15: &'static str = "Out ch2\nAudio channel 2 (right)\nRange: (-1..1)";
     pub const ch16: &'static str = "Out ch2\nAudio channel 2 (right)\nRange: (-1..1)";
     pub const ch17: &'static str = "Out ch2\nAudio channel 2 (right)\nRange: (-1..1)";
+
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
 }
 
 impl DspNode for Out {

src/dsp/node_sampl.rs

@@ -89,6 +89,9 @@ impl Sampl {
 
     pub const sig : &'static str =
         "Sampl sig\nSampler audio output\nRange: (-1..1)\n";
+
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
 }
 
 impl Sampl {

src/dsp/node_sin.rs

@@ -9,7 +9,6 @@ use crate::dsp::{
 };
 use crate::dsp::helpers::fast_sin;
 
-
 /// A sine oscillator
 #[derive(Debug, Clone)]
 pub struct Sin {
@@ -39,6 +38,29 @@ impl Sin {
          \nRange: (Knob -0.2 .. 0.2) / (Signal -1.0 .. 1.0)\n";
     pub const sig : &'static str =
         "Sin sig\nOscillator signal output.\n\nRange: (-1..1)\n";
+
+    pub const DESC : &'static str =
+    r#"Sin - A Sine Oscillator
+
+    This is a very simple oscillator that generates a
+    sine wave.
+    "#;
+
+    pub const HELP : &'static str =
+    r#"Sin - A Sine Oscillator
+
+    This is a very simple oscillator that generates a sine wave.
+    The 'freq' paramter specifies the frequency, and the 'det' parameter
+    allows you to detune the oscillator easily.
+
+    You can send any signal to these input ports. The 'det' parameter takes
+    the same signal range as 'freq', which means, that a value of 0.1 detunes
+    by one octave. And a value 1.0 detunes by 10 octaves. This means that
+    for 'det' to be usefully modulated you need to attenuate the modulation input.
+
+    You can do FM with this node, but for easy FM synthesis there are other
+    nodes available.
+    "#;
 }
 
 impl DspNode for Sin {

src/dsp/node_test.rs

@@ -31,6 +31,9 @@ pub struct Test {
 }
 
 impl Test {
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
+
     pub fn new(_nid: &NodeId) -> Self {
         Self {
         }

src/dsp/node_tseq.rs

@@ -80,6 +80,9 @@ impl TSeq {
         "TSeq gat5\nTrack 5 gate output\nRange: (-1..1)\n";
     pub const gat6 : &'static str =
         "TSeq gat6\nTrack 6 gate output\nRange: (-1..1)\n";
+
+    pub const DESC : &'static str = r#""#;
+    pub const HELP : &'static str = r#""#;
 }
 
 impl DspNode for TSeq {