private void newVertexBufferToDraw() {
// (number of points) * (number of coordinate values) * 4 bytes per float)
ByteBuffer bb = ByteBuffer.allocateDirect(verticesCoords.size() * COORDS_PER_VERTEX * 4);
// use the device hardware's native byte order
bb.order(ByteOrder.nativeOrder());
// create a floating point buffer from the ByteBuffer
vertexBuffer = bb.asFloatBuffer();
// add the coordinates to the FloatBuffer
vertexBuffer.put(Utils.pointVectorToArray(verticesCoords));
// set the buffer to read the first coordinate
vertexBuffer.position(0);
vertexCount = verticesCoords.size();
// Log.d(GAlg.DEBUG_TAG, "Scene coords to draw: " + verticesCoords.toString());
GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, 0, vertexCount, vertexBuffer);
if (drawLines) {
bb = ByteBuffer.allocateDirect(linesCoords.size() * COORDS_PER_VERTEX * 4);
bb.order(ByteOrder.nativeOrder());
linesVertexBuffer = bb.asFloatBuffer();
linesVertexBuffer.put(Utils.pointVectorToArray(linesCoords));
linesVertexBuffer.position(0);
linesVertexCount = linesCoords.size();
Log.d(GAlg.DEBUG_TAG, "Drawing lines between: " + linesCoords.toString());
GLES20.glBufferSubData(GLES20.GL_ARRAY_BUFFER, 0, linesVertexCount, linesVertexBuffer);
}
}
public void addRandomPoints() {
verticesCoords.addAll(
Utils.generateSomeVertices(
GAlg.HOW_MANY_POINTS_GENERATE,
GAlg.BORDER_POINT_POSITION,
GAlg.BORDER_POINT_POSITION,
pointsRenderer.getSurfaceWidth() - GAlg.BORDER_POINT_POSITION,
pointsRenderer.getSurfaceHeight() - GAlg.BORDER_POINT_POSITION));
newVertexBufferToDraw();
}
public void selectVertex(Point2D point2d) {
if (!vertexSelected) {
// Brutal force :-)
for (int i = 0; i < verticesCoords.size(); i++) {
if (Utils.isInRectangle(point2d, GAlg.FINGER_ACCURACY, verticesCoords.get(i))) {
selectedVertexIndex = i;
vertexSelected = true;
break;
}
}
}
}
public void removeVertex(Point2D point2d) {
List<Point2D> newSceneCoords = verticesCoords;
// Brutal force...
// TODO: Divide search space
for (int i = 0; i < verticesCoords.size(); i++) {
if (Utils.isInRectangle(point2d, GAlg.FINGER_ACCURACY, verticesCoords.get(i))) {
newSceneCoords.remove(i);
break;
}
}
verticesCoords = newSceneCoords;
newVertexBufferToDraw();
}