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package com.google.skar;
import android.graphics.Matrix;
import android.graphics.Path;
import android.graphics.PointF;
public class SkARFingerPainting { ;
public Path path = new Path();
private int numberOfPoints = 0;
// Holds the model matrix of the first point added to such that the path can be drawn at the
// model location (i.e on the Plane)
private float[] modelMatrix;
// Holds the inverse model matrix of the first point that was added such that the path is drawn
// first at (0, 0)
private float[] inverseModelMatrix;
public SkARFingerPainting() {}
// Adds another point to the path in Local space (i.e apply InverseModelMatrix to points located
// in Global space (e.g hit positions acquired through hit tests)
public void addPoint(PointF p) {
if (numberOfPoints == 0) {
path.moveTo(p.x, p.y);
} else {
path.lineTo(p.x, p.y);
}
numberOfPoints++;
}
public boolean isEmpty() {
return numberOfPoints == 0;
}
public float[] getModelMatrix() {
return modelMatrix;
}
public float[] getRawInverseModelMatrix() {
return inverseModelMatrix;
}
public Matrix getInverseModelMatrix() {
return SkARMatrix.createMatrixFrom4x4(inverseModelMatrix);
}
public void setModelMatrix(float[] m) {
modelMatrix = m;
}
public void setInverseModelMatrix(float[] m) {
inverseModelMatrix = m;
}
}
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