Feat: add saw wave lookup table generation

Refs: #2

src/generators.cpp

@@ -33,3 +33,18 @@ sample_table_t gen_squ()
 
   return squ_vals;
 }
+
+sample_table_t gen_saw()
+{
+  sample_table_t saw_vals = {0};
+  float_t step = 2.0 / DEFAULT_N_SAMPLES; // calculate our incremental step size
+  float_t val = 0; // place to store calculate value
+
+  // Start low go high [-1, 1]
+  for (uint16_t i = 0; i < DEFAULT_N_SAMPLES; i++) {
+    saw_vals[i] = val;
+    val += step;
+  }
+
+  return saw_vals;
+}

src/generators.h

@@ -19,24 +19,19 @@ sample_table_t gen_sin();
  */
 sample_table_t gen_squ();
 
-/*! Generate triangle wave data
-    @return a table of values
- */
-sample_table_t gen_tri();
-
-/*! Generate triangle wave data
-    @return a table of values
- */
-sample_table_t gen_tri();
-
 /*! Generate saw wave data
     @return a table of values
  */
 sample_table_t gen_saw();
 
-/*! Generate ramp wave data
+/*! Generate inverse saw wave data
     @return a table of values
  */
-sample_table_t gen_ramp();
+sample_table_t gen_isaw();
+
+/*! Generate triangle wave data
+    @return a table of values
+ */
+sample_table_t gen_tri();
 
 #endif // GENERATORS_H_

src/wtpp.cpp

@@ -25,20 +25,24 @@ static void log(std::string message)
 int main()
 {
   log("Generating wave cycle lookup tables");
-  Wave sin_wave, squ_wave;
+  Wave sin_wave, squ_wave, saw_wave;
 
   // Calculate fundamental wave values
   sample_table_t sin_vals = gen_sin();
   sample_table_t squ_vals = gen_squ();
+  sample_table_t saw_vals = gen_saw();
 
   // Set wave lookup table values
   sin_wave.setTable(sin_vals);
   squ_wave.setTable(squ_vals);
+  saw_wave.setTable(saw_vals);
 
   log("Printing head of sine table");
   sin_wave.print_head();
   log("Printing head of square table");
   squ_wave.print_head();
+  log("Printing head of saw table");
+  saw_wave.print_head();
 
   // Create Wavetable object containing fundamental Wave objects
   Wavetable wt_01{"Fundamental Waves"};