/**
* Compute the {@link Graduations} used to the ruler drawing in auto-ticks mode..
*
* @return the used decimal format.
*/
private DecimalFormat computeUserGraduation() {
/* The maximum distance corresponding to the actually displayed sprites. */
double maxSpritesDistance = 0.0;
Graduations currentGraduations = rulerModel.getGraduations();
List<Double> ticks = currentGraduations.getNewValues();
DecimalFormat format = currentGraduations.getFormat();
for (double value : ticks) {
Texture sprite = computeSprite(value, format);
if (sprite != null) {
Vector3d windowPosition = canvasProjection.project(rulerModel.getPosition(value));
Vector3d delta = projectCenterToEdge(sprite, windowTicksDelta);
spritesList.add(
new PositionedSprite(sprite, windowPosition.plus(windowTicksDelta.plus(delta))));
Vector3d farDelta = windowTicksDelta.plus(delta.times(2.0));
maxSpritesDistance = Math.max(maxSpritesDistance, farDelta.getNorm());
}
}
this.graduations = currentGraduations;
this.maximalSpritesDistance = maxSpritesDistance;
return format;
}
/**
* Compute the {@link Graduations} used to the ruler drawing in auto-ticks mode..
*
* @return the used decimal format.
*/
private DecimalFormat computeAutoGraduation() {
/* The maximum distance corresponding to the actually displayed sprites. */
double maxSpritesDistance = 0.0;
Graduations currentGraduations = rulerModel.getGraduations();
Graduations ticksGraduation = currentGraduations;
DecimalFormat format = currentGraduations.getFormat();
boolean canGetMore = true;
List<PositionedSprite> newSpritesList = new LinkedList<PositionedSprite>();
while (currentGraduations != null) {
/* The maximum distance to any of the sprites' farthest sides at a given iteration. */
double currentMaximalSpritesDistance = 0;
newSpritesList.clear();
List<Double> ticks = currentGraduations.getNewValues();
for (double value : ticks) {
Texture sprite = computeSprite(value, format);
Vector3d windowPosition = canvasProjection.project(rulerModel.getPosition(value));
Dimension textureSize = computeSpriteDimension(value);
Vector3d delta = projectCenterToEdge(textureSize, windowTicksDelta);
PositionedSprite newSprite =
new PositionedSprite(
sprite, textureSize, windowPosition.plus(windowTicksDelta.plus(delta)));
newSpritesList.add(newSprite);
Vector3d farDelta = windowTicksDelta.plus(delta.times(2.0));
currentMaximalSpritesDistance =
Math.max(currentMaximalSpritesDistance, farDelta.getNorm());
}
if (collide(newSpritesList, rulerModel.getMargin())
|| collide(spritesList, newSpritesList, rulerModel.getMargin())) {
currentGraduations = currentGraduations.getAlternative();
canGetMore = false;
} else {
maxSpritesDistance = Math.max(maxSpritesDistance, currentMaximalSpritesDistance);
spritesList.addAll(newSpritesList);
ticksGraduation = currentGraduations;
if (canGetMore) {
currentGraduations = currentGraduations.getMore();
} else {
currentGraduations = null;
}
}
}
this.graduations = ticksGraduation;
this.maximalSpritesDistance = maxSpritesDistance;
return format;
}
/**
* 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);
}
}
/**
* Compute and return the minimal screen distance between two successive ticks of the given
* {@link Graduations}. If the given {@link Graduations} is <code>null</code>, the returned
* value is {@link Double#MAX_VALUE}.
*
* @param graduations the given {@link Graduations}.
* @return the minimal screen distance between two successive ticks of the given {@link
* Graduations}.
*/
private double computeTicksDistance(Graduations graduations) {
double minimalDistance = Double.MAX_VALUE;
if (graduations != null) {
Vector3d previousProjection = null;
for (double currentValue : graduations.getAllValues()) {
Vector3d currentProjection =
canvasProjection.project(rulerModel.getPosition(currentValue));
if (previousProjection != null) {
minimalDistance =
Math.min(minimalDistance, currentProjection.minus(previousProjection).getNorm2());
}
previousProjection = currentProjection;
}
minimalDistance = Math.sqrt(minimalDistance);
}
return minimalDistance;
}