public int getPixel(int x, int y, int[] inPixels, int width, int height) {
float nx = m00 * x + m01 * y;
float ny = m10 * x + m11 * y;
nx /= scale;
ny /= scale * stretch;
nx += 1000;
ny += 1000; // Reduce artifacts around 0,0
float f = turbulence == 1.0f ? evaluate(nx, ny) : turbulence2(nx, ny, turbulence);
// Normalize to 0..1
// f = (f-min)/(max-min);
f *= 2;
f *= amount;
int a = 0xff000000;
int v;
if (colormap != null) {
v = colormap.getColor(f);
if (useColor) {
int srcx = ImageMath.clamp((int) ((results[0].x - 1000) * scale), 0, width - 1);
int srcy = ImageMath.clamp((int) ((results[0].y - 1000) * scale), 0, height - 1);
v = inPixels[srcy * width + srcx];
f =
(results[1].distance - results[0].distance)
/ (results[1].distance + results[0].distance);
f = ImageMath.smoothStep(coefficients[1], coefficients[0], f);
v = ImageMath.mixColors(f, 0xff000000, v);
}
return v;
} else {
v = PixelUtils.clamp((int) (f * 255));
int r = v << 16;
int g = v << 8;
int b = v;
return a | r | g | b;
}
}
public int getPixel(int x, int y, int[] inPixels, int width, int height) {
float nx = m00 * x + m01 * y;
float ny = m10 * x + m11 * y;
nx /= scale;
ny /= scale * stretch;
nx += 1000;
ny += 1000; // Reduce artifacts around 0,0
float f = evaluate(nx, ny);
float f1 = results[0].distance;
float f2 = results[1].distance;
int srcx = ImageMath.clamp((int) ((results[0].x - 1000) * scale), 0, width - 1);
int srcy = ImageMath.clamp((int) ((results[0].y - 1000) * scale), 0, height - 1);
int v = inPixels[srcy * width + srcx];
f = (f2 - f1) / edgeThickness;
f = ImageMath.smoothStep(0, edgeThickness, f);
if (fadeEdges) {
srcx = ImageMath.clamp((int) ((results[1].x - 1000) * scale), 0, width - 1);
srcy = ImageMath.clamp((int) ((results[1].y - 1000) * scale), 0, height - 1);
int v2 = inPixels[srcy * width + srcx];
v2 = ImageMath.mixColors(0.5f, v2, v);
v = ImageMath.mixColors(f, v2, v);
} else v = ImageMath.mixColors(f, edgeColor, v);
return v;
}
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);
}
private int getEnvironmentMap(Vector3f normal, int[] inPixels, int width, int height) {
if (environmentMap != null) {
float angle = (float) Math.acos(-normal.y);
float x, y;
y = angle / ImageMath.PI;
if (y == 0.0f || y == 1.0f) x = 0.0f;
else {
float f = normal.x / (float) Math.sin(angle);
if (f > 1.0f) f = 1.0f;
else if (f < -1.0f) f = -1.0f;
x = (float) Math.acos(f) / ImageMath.PI;
}
// A bit of empirical scaling....
x = ImageMath.clamp(x * envWidth, 0, envWidth - 1);
y = ImageMath.clamp(y * envHeight, 0, envHeight - 1);
int ix = (int) x;
int iy = (int) y;
float xWeight = x - ix;
float yWeight = y - iy;
int i = envWidth * iy + ix;
int dx = ix == envWidth - 1 ? 0 : 1;
int dy = iy == envHeight - 1 ? 0 : envWidth;
return ImageMath.bilinearInterpolate(
xWeight,
yWeight,
envPixels[i],
envPixels[i + dx],
envPixels[i + dy],
envPixels[i + dx + dy]);
}
return 0;
}