/**
* Fill a vertices buffer with the needed data to draw a ruler.
*
* @param verticesBuffer the {@link ElementsBuffer} to fill.
* @param rulerModel the {@link RulerModel} to draw.
* @param ticksValue the list of ticks.
* @param subTicksValue the list of sub-ticks.
* @param canvasProjection the used canvas projection.
*/
private void fillVertices(
ElementsBuffer verticesBuffer,
RulerModel rulerModel,
List<Double> ticksValue,
List<Double> subTicksValue,
Transformation canvasProjection) {
Vector3d a = rulerModel.getFirstPoint();
Vector3d b = rulerModel.getSecondPoint();
if ((a != null) && (b != null)) {
int bufferSize = 2 * ticksValue.size() + 2 * subTicksValue.size();
if (rulerModel.isLineVisible()) {
bufferSize += 2;
}
FloatBuffer data = FloatBuffer.allocate(4 * bufferSize);
data.rewind();
for (double value : ticksValue) {
Vector3d p = canvasProjection.project(rulerModel.getPosition(value));
data.put(p.getDataAsFloatArray(4));
data.put(p.plus(windowTicksDelta).getDataAsFloatArray(4));
}
for (double value : subTicksValue) {
Vector3d p = canvasProjection.project(rulerModel.getPosition(value));
data.put(p.getDataAsFloatArray(4));
data.put(p.plus(windowSubTicksDelta).getDataAsFloatArray(4));
}
if (rulerModel.isLineVisible()) {
data.put(canvasProjection.project(a).getDataAsFloatArray(4));
data.put(canvasProjection.project(b).getDataAsFloatArray(4));
}
data.rewind();
verticesBuffer.setData(data, 4);
} else {
verticesBuffer.setData(new float[0], 4);
}
}
