implemented 6/6 Band Animations

rgbanimations/utilFuncsMath.go

@@ -33,6 +33,8 @@ func HSVToRGB(h, s, v uint8) (r, g, b, a uint8) {
 	}
 }
 
+// Math Functions based on lib8tion math8.h
+
 func Scale8(i uint8, scale uint8) uint8 {
 	return uint8((uint16(i) * uint16(scale)) >> 8)
 }
@@ -112,3 +114,31 @@ func Atan28(dy int16, dx int16) uint8 {
 	}
 	return uint8(a)
 }
+
+func Sqrt16(x uint16) uint8 {
+	if x <= 1 {
+		return uint8(x)
+	}
+
+	low := uint8(1) // lower bound
+	var hi, mid uint8
+
+	if x > 7904 {
+		hi = 255
+	} else {
+		hi = uint8((x >> 5) + 5) // initial estimate for upper bound
+	}
+
+	for ok := true; ok; ok = hi >= mid { // emulation of do-while loop
+		mid = (low + hi) >> 1
+		if uint16(mid)*uint16(mid) > x {
+			hi = mid - 1
+		} else {
+			if mid == 255 {
+				return 255
+			}
+			low = mid + 1
+		}
+	}
+	return low - 1
+}

rgbanimations/utilFuncsRunners.go

@@ -6,6 +6,7 @@ var time = uint16(0)
 
 type effectRunnerIFunc func(matrix *keyboard.RGBMatrix, i int, time uint16) (uint8, uint8, uint8)
 type effectRunnerDXDYFunc func(matrix *keyboard.RGBMatrix, dx int16, dy int16, time uint16) (uint8, uint8, uint8)
+type effectRunnerDXDYDistFunc func(matrix *keyboard.RGBMatrix, dx int16, dy int16, dist uint8, time uint16) (uint8, uint8, uint8)
 
 func effectRunnerI(matrix *keyboard.RGBMatrix, mathFunc effectRunnerIFunc) {
 	timeScaled := Scale16by8(time, matrix.CurrentSpeed)
@@ -26,3 +27,14 @@ func effectRunnerDXDY(matrix *keyboard.RGBMatrix, mathFunc effectRunnerDXDYFunc)
 	}
 	time++
 }
+
+func effectRunnerDXDYDist(matrix *keyboard.RGBMatrix, mathFunc effectRunnerDXDYDistFunc) {
+	timeScaled := Scale16by8(time, matrix.CurrentSpeed)
+	for i, val := range matrix.LedMatrixVals {
+		dx := int16(matrix.LedMatrixMapping[i].PhysicalX) - int16(matrix.CenterXPhysical)
+		dy := int16(matrix.LedMatrixMapping[i].PhysicalY) - int16(matrix.CenterYPhysical)
+		dist := Sqrt16(uint16(dx*dx + dy*dy))
+		h, s, v := mathFunc(matrix, dx, dy, dist, timeScaled)
+		val.R, val.G, val.B, val.A = HSVToRGB(h, s, v)
+	}
+}

rgbanimations/vialrgbBandSpiralSat.go

@@ -0,0 +1,19 @@
+package rgbanimations
+
+import keyboard "github.com/percyjw-2/tinygo-keyboard"
+
+func GetBansSpiralSatAnim() keyboard.RgbAnimation {
+	return keyboard.RgbAnimation{
+		AnimationFunc: vialRGBBandSpiralSat,
+		AnimationType: keyboard.VIALRGB_EFFECT_BAND_SPIRAL_SAT,
+	}
+}
+
+func bandSpiralSatMath(matrix *keyboard.RGBMatrix, dx int16, dy int16, dist uint8, time uint16) (uint8, uint8, uint8) {
+	s := Scale8(matrix.CurrentSaturation+dist-uint8(time)-Atan28(dy, dx), matrix.CurrentSaturation)
+	return matrix.CurrentHue, s, matrix.CurrentValue
+}
+
+func vialRGBBandSpiralSat(matrix *keyboard.RGBMatrix) {
+	effectRunnerDXDYDist(matrix, bandSpiralSatMath)
+}

rgbanimations/vialrgbBandSpiralVal.go

@@ -0,0 +1,19 @@
+package rgbanimations
+
+import keyboard "github.com/percyjw-2/tinygo-keyboard"
+
+func GetBansSpiralValAnim() keyboard.RgbAnimation {
+	return keyboard.RgbAnimation{
+		AnimationFunc: vialRGBBandSpiralVal,
+		AnimationType: keyboard.VIALRGB_EFFECT_BAND_SPIRAL_VAL,
+	}
+}
+
+func bandSpiralValMath(matrix *keyboard.RGBMatrix, dx int16, dy int16, dist uint8, time uint16) (uint8, uint8, uint8) {
+	v := Scale8(matrix.CurrentValue+dist-uint8(time)-Atan28(dy, dx), matrix.CurrentValue)
+	return matrix.CurrentHue, matrix.CurrentSaturation, v
+}
+
+func vialRGBBandSpiralVal(matrix *keyboard.RGBMatrix) {
+	effectRunnerDXDYDist(matrix, bandSpiralValMath)
+}