public void calc() {
try {
// 取得輸入區的字串, 轉成浮點數後除以角度換算單位
double theta = Double.parseDouble(degree.getText()) / convert;
// 計算三角函數值, 並將結果寫到各文字欄位中
sintxt.setText(String.format("%.3f", Math.sin(theta)));
costxt.setText(String.format("%.3f", Math.cos(theta)));
tantxt.setText(String.format("%.3f", Math.tan(theta)));
} catch (NumberFormatException e) {
degree.setText(""); // 發生例外時清除輸入區內容
}
}
protected void recalcWarpAmount() {
if (inRate == 0f) return;
double omegaIn, omegaOut, warp, d1;
ParamField ggWarp;
omegaIn = pr.para[PR_INFREQ].val / inRate * Constants.PI2;
omegaOut = pr.para[PR_OUTFREQ].val / inRate * Constants.PI2;
d1 = Math.tan((omegaOut - omegaIn) / 2);
warp =
Math.max(
-0.98,
Math.min(0.98, d1 / (Math.sin(omegaIn) + Math.cos(omegaIn) * d1))); // DAFx2000 'b'
ggWarp = (ParamField) gui.getItemObj(GG_WARP);
if (ggWarp != null) {
ggWarp.setParam(new Param(warp * 100, Param.FACTOR));
}
}
public void skewY(float angle) {
g2.shear(0, Math.tan(angle));
}
/**
* Gets a list of Point2D objects that lie within pixels in a rectangle and along a line.
*
* @param searchRect the rectangle
* @param x0 the x-component of a point on the line
* @param y0 the y-component of a point on the line
* @param slope the slope of the line
* @return a list of Point2D
*/
public ArrayList<Point2D> getSearchPoints(
Rectangle searchRect, double x0, double y0, double theta) {
double slope = -Math.tan(theta);
// create line to search along
Line2D line = new Line2D.Double();
if (slope > LARGE_NUMBER) {
line.setLine(x0, y0, x0, y0 + 1);
} else if (slope < 1 / LARGE_NUMBER) {
line.setLine(x0, y0, x0 + 1, y0);
} else {
line.setLine(x0, y0, x0 + 1, y0 + slope);
}
// create intersection points (to set line ends)
Point2D p1 = new Point2D.Double();
Point2D p2 = new Point2D.Double(Double.NaN, Double.NaN);
Point2D p = p1;
boolean foundBoth = false;
double d = searchRect.x;
Object[] data = getDistanceAndPointAtX(line, d);
if (data != null) {
p.setLocation((Point2D) data[1]);
if (p.getY() >= searchRect.y && p.getY() <= searchRect.y + searchRect.height) {
// line end is left edge
p = p2;
}
}
d += searchRect.width;
data = getDistanceAndPointAtX(line, d);
if (data != null) {
p.setLocation((Point2D) data[1]);
if (p.getY() >= searchRect.y && p.getY() <= searchRect.y + searchRect.height) {
// line end is right edge
if (p == p1) p = p2;
else foundBoth = true;
}
}
if (!foundBoth) {
d = searchRect.y;
data = getDistanceAndPointAtY(line, d);
if (data != null) {
p.setLocation((Point2D) data[1]);
if (p.getX() >= searchRect.x && p.getX() <= searchRect.x + searchRect.width) {
// line end is top edge
if (p == p1) p = p2;
else if (!p1.equals(p2)) foundBoth = true;
}
}
}
if (!foundBoth) {
d += searchRect.height;
data = getDistanceAndPointAtY(line, d);
if (data != null) {
p.setLocation((Point2D) data[1]);
if (p.getX() >= searchRect.x && p.getX() <= searchRect.x + searchRect.width) {
// line end is bottom edge
if (p == p2 && !p1.equals(p2)) foundBoth = true;
}
}
}
// if both line ends have been found, use line to find pixels to search
if (foundBoth) {
// set line ends to intersections
line.setLine(p1, p2);
if (p1.getX() > p2.getX()) {
line.setLine(p2, p1);
}
// find pixel intersections that fall along the line
int xMin = (int) Math.ceil(Math.min(p1.getX(), p2.getX()));
int xMax = (int) Math.floor(Math.max(p1.getX(), p2.getX()));
int yMin = (int) Math.ceil(Math.min(p1.getY(), p2.getY()));
int yMax = (int) Math.floor(Math.max(p1.getY(), p2.getY()));
// collect intersections in TreeMap sorted by position along line
TreeMap<Double, Point2D> intersections = new TreeMap<Double, Point2D>();
for (int x = xMin; x <= xMax; x++) {
Object[] next = getDistanceAndPointAtX(line, x);
intersections.put((Double) next[0], (Point2D) next[1]);
}
for (int y = yMin; y <= yMax; y++) {
Object[] next = getDistanceAndPointAtY(line, y);
intersections.put((Double) next[0], (Point2D) next[1]);
}
p = null;
// create array of search points that are midway between intersections
ArrayList<Point2D> searchPts = new ArrayList<Point2D>();
for (Double key : intersections.keySet()) {
Point2D next = intersections.get(key);
if (p != null) {
double x = (p.getX() + next.getX()) / 2 - searchRect.x;
double y = (p.getY() + next.getY()) / 2 - searchRect.y;
p.setLocation(x, y);
searchPts.add(p);
}
p = next;
}
return searchPts;
}
return null;
}
public void skewX(float angle) {
g2.shear(Math.tan(angle), 0);
}