Elliptical symmetry

[CI BUILD]

Assets/Resources/LuaScriptExamples/SymmetryScript.Ellipse.lua

@@ -0,0 +1,58 @@
+Settings = {
+    description="Radial copies of your stroke with optional color shifts"
+}
+
+Parameters = {
+    copies={label="Number of copies", type="int", min=1, max=36, default=32},
+    eccentricity={label="Eccentricity", type="float", min=0.1, max=3, default=2},
+    axisConsistency={label="Axis Consistency", type="float", min=0, max=2, default=1},
+    hueShiftFrequency={label="Hue Shift Frequency", type="float", min=0.1, max=6, default=1},
+    hueShiftAmount={label="Hue Shift Amount", type="float", min=0, max=1, default=0.3}
+}
+
+function Start()
+    initialHsv = brush.colorHsv
+    --symmetry.transform = {
+    --    {0, 10, 6},
+    --    {0, 90, 90}
+    --}
+end
+
+function Main()
+
+    pointers = {}
+    theta = (math.pi * 2.0) / copies
+    Colors = {}
+
+    for i = 0, copies - 1 do
+        angle = (symmetry.rotation.y * unityMathf.deg2Rad) + i * theta
+        pointer = {
+            position={
+                symmetry.brushOffset.x * symmetry.ellipse(angle, eccentricity),
+                symmetry.brushOffset.y,
+                unityMathf.lerp(
+                    symmetry.brushOffset.z,
+                symmetry.brushOffset.z * symmetry.ellipse(angle, eccentricity),
+                    axisConsistency
+                ),
+            },
+            rotation={0, angle * unityMathf.rad2Deg, 0}
+        }
+        table.insert(pointers, pointer)
+
+        --Colour cycling for the extra pointers
+        if hueShiftAmount > 0 then
+            t = i / copies
+            newHue = waveform.triangle(t, hueShiftFrequency) * hueShiftAmount
+            newColor = unityColor.hsvToRgb(initialHsv.x + newHue, initialHsv.y, initialHsv.z)
+            table.insert(Colors, newColor)
+        end
+
+    end
+    return pointers
+end
+
+function End()
+    --TODO
+    --color.setHsv(color.HsvToRgb(brush.colorHsv))
+end

Assets/Resources/LuaScriptExamples/SymmetryScript.ManyAround.lua

@@ -26,7 +26,7 @@ function Main()
         angle = i * theta
         pointer = {
             position={
-                symmetry.brushOffset.x * (1 + (math.sin(angle/360 * 8 * math.pi)) * 0.125),
+                symmetry.brushOffset.x,
                 symmetry.brushOffset.y,
                 symmetry.brushOffset.z
             },

Assets/Resources/LuaScriptExamples/SymmetryScript.TooManyAround.lua

@@ -0,0 +1,52 @@
+Settings = {
+    description="Radial copies of your stroke with optional color shifts"
+}
+
+Parameters = {
+    copies={label="Number of copies", type="int", min=1, max=36, default=32},
+    hueShiftFrequency={label="Hue Shift Frequency", type="float", min=0.1, max=6, default=1},
+    hueShiftAmount={label="Hue Shift Amount", type="float", min=0, max=1, default=0.3}
+}
+
+function Start()
+    initialHsv = brush.colorHsv
+    --symmetry.transform = {
+    --    {0, 10, 6},
+    --    {0, 90, 90}
+    --}
+end
+
+function Main()
+
+    pointers = {}
+    theta = 360.0 / copies
+    Colors = {}
+
+    for i = 0, copies - 1 do
+        angle = i * theta
+        pointer = {
+            position={
+                symmetry.brushOffset.x * (1 + (math.sin(angle/360 * 16 * math.pi)) * 0.25),
+                symmetry.brushOffset.y,
+                symmetry.brushOffset.z
+            },
+            rotation={0, angle, 0}
+        }
+        table.insert(pointers, pointer)
+
+        --Colour cycling for the extra pointers
+        if hueShiftAmount > 0 then
+            t = i / copies
+            newHue = waveform.triangle(t, hueShiftFrequency) * hueShiftAmount
+            newColor = unityColor.hsvToRgb(initialHsv.x + newHue, initialHsv.y, initialHsv.z)
+            table.insert(Colors, newColor)
+        end
+
+    end
+    return pointers
+end
+
+function End()
+    --TODO
+    --color.setHsv(color.HsvToRgb(brush.colorHsv))
+end

Assets/Scripts/API/Lua/Wrappers/OpenBrushAppWrappers.cs

@@ -200,6 +200,10 @@ public static Quaternion rotation
         public static void twoHandeded() => ApiMethods.SymmetryTwoHanded();
         public static void summonWidget() => ApiMethods.SummonMirror();
         public static void spin(Vector3 rot) => PointerManager.m_Instance.SymmetryWidget.Spin(rot);
+        public static float ellipse(float angle, float minorRadius)
+        {
+            return minorRadius / Mathf.Sqrt(Mathf.Pow(minorRadius * Mathf.Cos(angle), 2) + Mathf.Pow(Mathf.Sin(angle), 2));
+        }
     }
 
     [MoonSharpUserData]