private void conicalGradient(int[] pixels, int y, int w, int h) {
int off = 0;
float angle0 = (float) Math.atan2(p2.x - p1.x, p2.y - p1.y);
for (int x = 0; x < w; x++) {
float angle = (float) (Math.atan2(x - p1.x, y - p1.y) - angle0) / (ImageMath.TWO_PI);
angle += 1.0f;
angle %= 1.0f;
if (type == BICONICAL) angle = ImageMath.triangle(angle);
int rgb = colormap.getColor(map(angle));
pixels[off] = PixelUtils.combinePixels(rgb, pixels[off], paintMode);
off++;
}
}
// From: http://forum.java.sun.com/thread.jspa?threadID=378460&tstart=135
void drawArrow(
Graphics2D g2d,
int xCenter,
int yCenter,
int x,
int y,
float stroke,
BasicStroke drawStroke) {
double aDir = Math.atan2(xCenter - x, yCenter - y);
// Line can be dashed.
g2d.setStroke(drawStroke);
g2d.drawLine(x, y, xCenter, yCenter);
// make the arrow head solid even if dash pattern has been specified
g2d.setStroke(lineStroke);
Polygon tmpPoly = new Polygon();
int i1 = 12 + (int) (stroke * 2);
// make the arrow head the same size regardless of the length length
int i2 = 6 + (int) stroke;
tmpPoly.addPoint(x, y);
tmpPoly.addPoint(x + xCor(i1, aDir + .5), y + yCor(i1, aDir + .5));
tmpPoly.addPoint(x + xCor(i2, aDir), y + yCor(i2, aDir));
tmpPoly.addPoint(x + xCor(i1, aDir - .5), y + yCor(i1, aDir - .5));
tmpPoly.addPoint(x, y); // arrow tip
g2d.drawPolygon(tmpPoly);
// Remove this line to leave arrow head unpainted:
g2d.fillPolygon(tmpPoly);
}
public void mousePressed(MouseEvent e) {
requestFocus();
Point p = e.getPoint();
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
p.translate(-(getWidth() / 2 - size / 2), -(getHeight() / 2 - size / 2));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
// the two circular views:
double radius = ((double) size) / 2.0;
double x = p.getX() - size / 2.0;
double y = p.getY() - size / 2.0;
double r = Math.sqrt(x * x + y * y) / radius;
double theta = Math.atan2(y, x) / (Math.PI * 2.0);
if (r > 1) r = 1;
if (mode == ColorPicker.BRI) {
setHSB((float) (theta + .25f), (float) (r), bri);
} else {
setHSB((float) (theta + .25f), sat, (float) (r));
}
} else if (mode == ColorPicker.HUE) {
float s = ((float) p.x) / ((float) size);
float b = ((float) p.y) / ((float) size);
if (s < 0) s = 0;
if (s > 1) s = 1;
if (b < 0) b = 0;
if (b > 1) b = 1;
setHSB(hue, s, b);
} else {
int x2 = p.x * 255 / size;
int y2 = p.y * 255 / size;
if (x2 < 0) x2 = 0;
if (x2 > 255) x2 = 255;
if (y2 < 0) y2 = 0;
if (y2 > 255) y2 = 255;
if (mode == ColorPicker.RED) {
setRGB(red, x2, y2);
} else if (mode == ColorPicker.GREEN) {
setRGB(x2, green, y2);
} else {
setRGB(x2, y2, blue);
}
}
}
protected void transformInverse(int x, int y, float[] out) {
float dx = x - icentreX;
float dy = y - icentreY;
float distance = dx * dx + dy * dy;
if (distance > radius2) {
out[0] = x;
out[1] = y;
} else {
distance = (float) Math.sqrt(distance);
float a = (float) Math.atan2(dy, dx) + angle * (radius - distance) / radius;
out[0] = icentreX + distance * (float) Math.cos(a);
out[1] = icentreY + distance * (float) Math.sin(a);
}
}
public int filterRGB(int x, int y, int rgb) {
float dx = x - centreX;
float dy = y - centreY;
float distance = dx * dx + dy * dy;
float angle = (float) Math.atan2(dy, dx);
float d = (angle + ImageMath.PI) / (ImageMath.TWO_PI) * rays;
int i = (int) d;
float f = d - i;
if (radius != 0) {
float length = ImageMath.lerp(f, rayLengths[i % rays], rayLengths[(i + 1) % rays]);
float g = length * length / (distance + 0.0001f);
g = (float) Math.pow(g, (100 - amount) / 50.0);
f -= 0.5f;
// f *= amount/50.0f;
f = 1 - f * f;
f *= g;
}
f = ImageMath.clamp(f, 0, 1);
return ImageMath.mixColors(f, rgb, color);
}
/** Regenerates the image. */
private synchronized void regenerateImage() {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
float bri2 = this.bri;
float sat2 = this.sat;
float radius = ((float) size) / 2f;
float hue2;
float k = 1.2f; // the number of pixels to antialias
for (int y = 0; y < size; y++) {
float y2 = (y - size / 2f);
for (int x = 0; x < size; x++) {
float x2 = (x - size / 2f);
double theta = Math.atan2(y2, x2) - 3 * Math.PI / 2.0;
if (theta < 0) theta += 2 * Math.PI;
double r = Math.sqrt(x2 * x2 + y2 * y2);
if (r <= radius) {
if (mode == ColorPicker.BRI) {
hue2 = (float) (theta / (2 * Math.PI));
sat2 = (float) (r / radius);
} else { // SAT
hue2 = (float) (theta / (2 * Math.PI));
bri2 = (float) (r / radius);
}
row[x] = Color.HSBtoRGB(hue2, sat2, bri2);
if (r > radius - k) {
int alpha = (int) (255 - 255 * (r - radius + k) / k);
if (alpha < 0) alpha = 0;
if (alpha > 255) alpha = 255;
row[x] = row[x] & 0xffffff + (alpha << 24);
}
} else {
row[x] = 0x00000000;
}
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
} else if (mode == ColorPicker.HUE) {
float hue2 = this.hue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
row[x] = Color.HSBtoRGB(hue2, x2, y2);
}
image.getRaster().setDataElements(0, y, image.getWidth(), 1, row);
}
} else { // mode is RED, GREEN, or BLUE
int red2 = red;
int green2 = green;
int blue2 = blue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
if (mode == ColorPicker.RED) {
green2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else if (mode == ColorPicker.GREEN) {
red2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else {
red2 = (int) (x2 * 255 + .49);
green2 = (int) (y2 * 255 + .49);
}
row[x] = 0xFF000000 + (red2 << 16) + (green2 << 8) + blue2;
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
}
repaint();
}