Merge pull request #322 from ahall99/polygon-bitcrush

Add Polygon Bit Crush Effect

Resources/svg/polygon_bitcrush.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="24px" viewBox="0 -960 960 960" width="24px" fill="#e3e3e3"><path d="M298-200h364l123-369-305-213-305 213 123 369Zm-58 80L80-600l400-280 400 280-160 480H240Zm240-371Z"/></svg>

Source/PluginProcessor.cpp

@@ -12,6 +12,7 @@
 #include "audio/BitCrushEffect.h"
 #include "audio/BulgeEffect.h"
 #include "audio/TwistEffect.h"
+#include "audio/PolygonBitCrushEffect.h"
 #include "audio/SpiralBitCrushEffect.h"
 #include "audio/DistortEffect.h"
 #include "audio/KaleidoscopeEffect.h"
@@ -61,6 +62,7 @@ OscirenderAudioProcessor::OscirenderAudioProcessor() : CommonAudioProcessor(Buse
     toggleableEffects.push_back(BounceEffect().build());
     toggleableEffects.push_back(TwistEffect().build());
     toggleableEffects.push_back(SkewEffect().build());
+    toggleableEffects.push_back(PolygonBitCrushEffect().build());
     toggleableEffects.push_back(VortexEffect().build());
     toggleableEffects.push_back(GodRayEffect().build());
     toggleableEffects.push_back(SpiralBitCrushEffect().build());

Source/audio/BulgeEffect.h

@@ -7,11 +7,11 @@ public:
 		double value = values[0];
 		double translatedBulge = -value + 1;
 
-		double r = sqrt(pow(input.x, 2) + pow(input.y, 2));
-		double theta = atan2(input.y, input.x);
-		double rn = pow(r, translatedBulge);
-
-		return osci::Point(rn * cos(theta), rn * sin(theta), input.z);
+		double r = std::hypot(input.x, input.y);
+        if (r == 0) return input;
+		double rn = std::pow(r, translatedBulge);
+		double scale = rn / r;
+		return osci::Point(scale * input.x, scale * input.y, input.z);
 	}
 
 	std::shared_ptr<osci::Effect> build() const override {

Source/audio/PolygonBitCrushEffect.h

@@ -0,0 +1,62 @@
+#pragma once
+#include <JuceHeader.h>
+#include "../MathUtil.h"
+
+// Inspired by xenontesla122
+class PolygonBitCrushEffect : public osci::EffectApplication {
+public:
+    osci::Point apply(int index, osci::Point input, const std::vector<std::atomic<double>> &values, double sampleRate) override {
+        const double pi = juce::MathConstants<double>::pi;
+        const double twoPi = juce::MathConstants<double>::twoPi;
+        double effectScale = juce::jlimit(0.0, 1.0, values[0].load());
+        double nSides = juce::jmax(2.0, values[1].load());
+        double stripeSize = juce::jmax(1e-4, values[2].load());
+        stripeSize = std::pow(0.63 * stripeSize, 1.5); // Change range and bias toward smaller values
+        double rotation = values[3] * twoPi;
+        double stripePhase = values[4];
+
+        osci::Point output(0);
+        if (input.x != 0 || input.y != 0) {
+            // Note 90 degree rotation: Theta is treated relative to +Y rather than +X
+            double r = std::hypot(input.x, input.y);
+            double theta = std::atan2(-input.x, input.y) - rotation;
+            theta = MathUtil::wrapAngle(theta + pi) - pi; // Move branch cut to +/-pi after angle offset is applied
+            double regionCenterTheta = std::round(theta * nSides / twoPi) / nSides * twoPi;
+            double localTheta = theta - regionCenterTheta;
+            double dist = r * std::cos(localTheta);
+            double newDist = juce::jmax(0.0, (std::round(dist / stripeSize - stripePhase) + stripePhase) * stripeSize);
+            double scale = newDist / dist;
+            output.x = scale * input.x;
+            output.y = scale * input.y;
+        }
+        // Apply the same stripe quantization to abs(z) if the input is 3D
+        double absZ = std::abs(input.z);
+        if (absZ > 0.0001) {
+            double signZ = input.z > 0 ? 1 : -1;
+            output.z = signZ * juce::jmax(0.0, (std::round(absZ / stripeSize - stripePhase) + stripePhase) * stripeSize);
+        }
+        return (1 - effectScale) * input + effectScale * output;
+    }
+
+    std::shared_ptr<osci::Effect> build() const override {
+        auto eff = std::make_shared<osci::Effect>(
+            std::make_shared<PolygonBitCrushEffect>(),
+            std::vector<osci::EffectParameter*>{
+                new osci::EffectParameter("Polygon Bit Crush",
+                                          "Constrains points to a polygon pattern.",
+                                          "polygonBitCrush", VERSION_HINT, 1.0, 0.0, 1.0),
+                new osci::EffectParameter("Sides", "Controls the number of sides of the polygon pattern.",
+                                          "polygonBitCrushSides", VERSION_HINT, 5.0, 3.0, 8.0),
+                new osci::EffectParameter("Stripe Size",
+                                          "Controls the spacing between the stripes of the polygon pattern.",
+                                          "polygonBitCrushStripeSize", VERSION_HINT, 0.5, 0.0, 1.0),
+                new osci::EffectParameter("Rotation", "Rotates the polygon pattern.",
+                                          "polygonBitCrushRotation", VERSION_HINT, 0.0, 0.0, 1.0, 0.0001, osci::LfoType::Sawtooth, 0.1),
+                new osci::EffectParameter("Stripe Phase", "Offsets the stripes of the polygon pattern.",
+                                          "polygonBitCrushStripePhase", VERSION_HINT, 0.0, 0.0, 1.0, 0.0001, osci::LfoType::Sawtooth, 2.0)
+            }
+        );
+        eff->setIcon(BinaryData::polygon_bitcrush_svg);
+        return eff;
+    }
+};

osci-render.jucer

@@ -127,6 +127,8 @@
         <FILE id="zFdUYi" name="planet.svg" compile="0" resource="1" file="Resources/svg/planet.svg"/>
         <FILE id="sfWuFd" name="play.svg" compile="0" resource="1" file="Resources/svg/play.svg"/>
         <FILE id="FJG3Ht" name="plus.svg" compile="0" resource="1" file="Resources/svg/plus.svg"/>
+        <FILE id="NVf72g" name="polygon_bitcrush.svg" compile="0" resource="1"
+              file="Resources/svg/polygon_bitcrush.svg"/>
         <FILE id="f0yiwT" name="puzzle.svg" compile="0" resource="1" file="Resources/svg/puzzle.svg"/>
         <FILE id="ElMcEN" name="pyramid.svg" compile="0" resource="1" file="Resources/svg/pyramid.svg"/>
         <FILE id="PFc2q2" name="random.svg" compile="0" resource="1" file="Resources/svg/random.svg"/>
@@ -176,6 +178,8 @@
         <FILE id="tU2pQl" name="SkewEffect.h" compile="0" resource="0" file="Source/audio/SkewEffect.h"/>
         <FILE id="yxWOsR" name="DuplicatorEffect.h" compile="0" resource="0"
               file="Source/audio/DuplicatorEffect.h"/>
+        <FILE id="GJoA2i" name="PolygonBitCrushEffect.h" compile="0" resource="0"
+              file="Source/audio/PolygonBitCrushEffect.h"/>
         <FILE id="GbAmhn" name="SpiralBitCrushEffect.h" compile="0" resource="0"
               file="Source/audio/SpiralBitCrushEffect.h"/>
         <FILE id="HE3dFE" name="AudioRecorder.h" compile="0" resource="0" file="Source/audio/AudioRecorder.h"/>
@@ -912,4 +916,3 @@
     <MODULE id="osci_render_core" showAllCode="1" useLocalCopy="0" useGlobalPath="0"/>
   </MODULES>
 </JUCERPROJECT>
-