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-rw-r--r--src/com/pheelicks/visualizer/renderer/CircleBarRenderer.java200
1 files changed, 103 insertions, 97 deletions
diff --git a/src/com/pheelicks/visualizer/renderer/CircleBarRenderer.java b/src/com/pheelicks/visualizer/renderer/CircleBarRenderer.java
index ff1e7d5..6d4e47f 100644
--- a/src/com/pheelicks/visualizer/renderer/CircleBarRenderer.java
+++ b/src/com/pheelicks/visualizer/renderer/CircleBarRenderer.java
@@ -4,6 +4,7 @@
* Licensed under the MIT license:
* http://creativecommons.org/licenses/MIT/
*/
+
package com.pheelicks.visualizer.renderer;
import android.graphics.Canvas;
@@ -16,106 +17,111 @@ import com.pheelicks.visualizer.FFTData;
public class CircleBarRenderer extends Renderer
{
- private int mDivisions;
- private Paint mPaint;
- private boolean mCycleColor;
-
- /**
- * Renders the FFT data onto a pulsing, rotating circle
- * @param canvas
- * @param paint - Paint to draw lines with
- */
- public CircleBarRenderer(Paint paint, int divisions)
- {
- this(paint, divisions, false);
- }
-
- /**
- * Renders the audio data onto a pulsing circle
- * @param canvas
- * @param paint - Paint to draw lines with
- * @param divisions - must be a power of 2. Controls how many lines to draw
- * @param cycleColor - If true the color will change on each frame
- */
- public CircleBarRenderer(Paint paint, int divisions, boolean cycleColor)
- {
- super();
- mPaint = paint;
- mDivisions = divisions;
- mCycleColor = cycleColor;
- }
-
- @Override
- public void onRender(Canvas canvas, AudioData data, Rect rect)
- {
- // Do nothing, we only display FFT data
- }
-
- @Override
- public void onRender(Canvas canvas, FFTData data, Rect rect)
- {
- if(mCycleColor)
+ private int mDivisions;
+ private Paint mPaint;
+ private boolean mCycleColor;
+
+ /**
+ * Renders the FFT data onto a pulsing, rotating circle
+ *
+ * @param canvas
+ * @param paint - Paint to draw lines with
+ */
+ public CircleBarRenderer(Paint paint, int divisions)
+ {
+ this(paint, divisions, false);
+ }
+
+ /**
+ * Renders the audio data onto a pulsing circle
+ *
+ * @param canvas
+ * @param paint - Paint to draw lines with
+ * @param divisions - must be a power of 2. Controls how many lines to draw
+ * @param cycleColor - If true the color will change on each frame
+ */
+ public CircleBarRenderer(Paint paint, int divisions, boolean cycleColor)
{
- cycleColor();
+ super();
+ mPaint = paint;
+ mDivisions = divisions;
+ mCycleColor = cycleColor;
}
- for (int i = 0; i < data.bytes.length / mDivisions; i++) {
- // Calculate dbValue
- byte rfk = data.bytes[mDivisions * i];
- byte ifk = data.bytes[mDivisions * i + 1];
- float magnitude = (rfk * rfk + ifk * ifk);
- float dbValue = 75 * (float)Math.log10(magnitude);
-
- float[] cartPoint = {
- (float)(i * mDivisions) / (data.bytes.length - 1),
- rect.height() / 2 - dbValue / 4
- };
-
- float[] polarPoint = toPolar(cartPoint, rect);
- mFFTPoints[i * 4] = polarPoint[0];
- mFFTPoints[i * 4 + 1] = polarPoint[1];
-
- float[] cartPoint2 = {
- (float)(i * mDivisions) / (data.bytes.length - 1),
- rect.height() / 2 + dbValue
- };
-
- float[] polarPoint2 = toPolar(cartPoint2, rect);
- mFFTPoints[i * 4 + 2] = polarPoint2[0];
- mFFTPoints[i * 4 + 3] = polarPoint2[1];
+ @Override
+ public void onRender(Canvas canvas, AudioData data, Rect rect)
+ {
+ // Do nothing, we only display FFT data
+ }
+
+ @Override
+ public void onRender(Canvas canvas, FFTData data, Rect rect)
+ {
+ if (mCycleColor)
+ {
+ cycleColor();
+ }
+
+ for (int i = 0; i < data.bytes.length / mDivisions; i++) {
+ // Calculate dbValue
+ byte rfk = data.bytes[mDivisions * i];
+ byte ifk = data.bytes[mDivisions * i + 1];
+ float magnitude = (rfk * rfk + ifk * ifk);
+ float dbValue = 75 * (float) Math.log10(magnitude);
+
+ float[] cartPoint = {
+ (float) (i * mDivisions) / (data.bytes.length - 1),
+ rect.height() / 2 - dbValue / 4
+ };
+
+ float[] polarPoint = toPolar(cartPoint, rect);
+ mFFTPoints[i * 4] = polarPoint[0];
+ mFFTPoints[i * 4 + 1] = polarPoint[1];
+
+ float[] cartPoint2 = {
+ (float) (i * mDivisions) / (data.bytes.length - 1),
+ rect.height() / 2 + dbValue
+ };
+
+ float[] polarPoint2 = toPolar(cartPoint2, rect);
+ mFFTPoints[i * 4 + 2] = polarPoint2[0];
+ mFFTPoints[i * 4 + 3] = polarPoint2[1];
+ }
+
+ canvas.drawLines(mFFTPoints, mPaint);
+
+ // Controls the pulsing rate
+ modulation += 0.13;
+ angleModulation += 0.28;
}
- canvas.drawLines(mFFTPoints, mPaint);
-
- // Controls the pulsing rate
- modulation += 0.13;
- angleModulation += 0.28;
- }
-
- float modulation = 0;
- float modulationStrength = 0.4f; // 0-1
- float angleModulation = 0;
- float aggresive = 0.4f;
- private float[] toPolar(float[] cartesian, Rect rect)
- {
- double cX = rect.width()/2;
- double cY = rect.height()/2;
- double angle = (cartesian[0]) * 2 * Math.PI;
- double radius = ((rect.width()/2) * (1 - aggresive) + aggresive * cartesian[1]/2) * ((1 - modulationStrength) + modulationStrength * (1 + Math.sin(modulation)) / 2);
- float[] out = {
- (float)(cX + radius * Math.sin(angle + angleModulation)),
- (float)(cY + radius * Math.cos(angle + angleModulation))
- };
- return out;
- }
-
- private float colorCounter = 0;
- private void cycleColor()
- {
- int r = (int)Math.floor(128*(Math.sin(colorCounter) + 1));
- int g = (int)Math.floor(128*(Math.sin(colorCounter + 2) + 1));
- int b = (int)Math.floor(128*(Math.sin(colorCounter + 4) + 1));
- mPaint.setColor(Color.argb(128, r, g, b));
- colorCounter += 0.03;
- }
+ float modulation = 0;
+ float modulationStrength = 0.4f; // 0-1
+ float angleModulation = 0;
+ float aggresive = 0.4f;
+
+ private float[] toPolar(float[] cartesian, Rect rect)
+ {
+ double cX = rect.width() / 2;
+ double cY = rect.height() / 2;
+ double angle = (cartesian[0]) * 2 * Math.PI;
+ double radius = ((rect.width() / 2) * (1 - aggresive) + aggresive * cartesian[1] / 2)
+ * ((1 - modulationStrength) + modulationStrength * (1 + Math.sin(modulation)) / 2);
+ float[] out = {
+ (float) (cX + radius * Math.sin(angle + angleModulation)),
+ (float) (cY + radius * Math.cos(angle + angleModulation))
+ };
+ return out;
+ }
+
+ private float colorCounter = 0;
+
+ private void cycleColor()
+ {
+ int r = (int) Math.floor(128 * (Math.sin(colorCounter) + 1));
+ int g = (int) Math.floor(128 * (Math.sin(colorCounter + 2) + 1));
+ int b = (int) Math.floor(128 * (Math.sin(colorCounter + 4) + 1));
+ mPaint.setColor(Color.argb(128, r, g, b));
+ colorCounter += 0.03;
+ }
}