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(); }