public override bool Update(ParameterList pl, SunflowAPI api)
{
string filename = pl.getstring("texture", null);
if (filename != null)
tex = TextureCache.getTexture(api.resolveTextureFilename(filename), false);
return tex != null && base.Update(pl, api);
}
public ImageBasedLight()
{
texture = null;
updateBasis(new Vector3(0, 0, -1), new Vector3(0, 1, 0));
numSamples = 64;
numLowSamples = 8;
}
public UberShader()
{
diff = spec = Color.GRAY;
diffmap = specmap = null;
diffBlend = specBlend = 1;
glossyness = 0;
numSamples = 4;
}
public bool update(ParameterList pl, SunflowAPI api)
{
string filename = pl.getstring("texture", null);
if (filename != null)
bumpTexture = TextureCache.getTexture(api.resolveTextureFilename(filename), true);
scale = pl.getFloat("scale", scale);
return bumpTexture != null;
}
/**
* Gets a reference to the texture specified by the given filename. If the
* texture has already been loaded the previous reference is returned,
* otherwise, a new texture is created.
*
* @param filename image file to load
* @param isLinear is the texture gamma corrected?
* @return texture object
* @see Texture
*/
public static Texture getTexture(string filename, bool isLinear)
{
lock (lockObj)
{
if (textures.ContainsKey(filename))
{
UI.printInfo(UI.Module.TEX, "Using cached copy for file \"%s\" ...", filename);
return textures[filename];
}
UI.printInfo(UI.Module.TEX, "Using file \"%s\" ...", filename);
Texture t = new Texture(filename, isLinear);
textures.Add(filename, t);
return t;
}
}
public bool update(ParameterList pl, SunflowAPI api)
{
updateBasis(pl.getVector("center", null), pl.getVector("up", null));
numSamples = pl.getInt("samples", numSamples);
string filename = pl.getstring("texture", null);
if (filename != null)
texture = TextureCache.getTexture(api.resolveTextureFilename(filename), true);
// no texture provided
if (texture == null)
return false;
Bitmap b = texture.getBitmap();
if (b == null)
return false;
// rebuild histograms if this is a new texture
if (filename != null) {
imageHistogram = new float[b.Width][];
for(int i = 0;i < imageHistogram.Length;i++)
imageHistogram[i] = new float[b.Height];
colHistogram = new float[b.Width];
float du = 1.0f / b.Width;
float dv = 1.0f / b.Height;
for (int x = 0; x < b.Width; x++) {
for (int y = 0; y < b.Height; y++) {
float u = (x + 0.5f) * du;
float v = (y + 0.5f) * dv;
Color c = texture.getPixel(u, v);
// box filter the image
// c.add(texture.getPixel(u + du, v));
// c.add(texture.getPixel(u + du, v+ dv));
// c.add(texture.getPixel(u, v + dv));
// c.mul(0.25f);
imageHistogram[x][y] = c.getLuminance() * (float) Math.Sin(Math.PI * v);
if (y > 0)
imageHistogram[x][y] += imageHistogram[x][y - 1];
}
colHistogram[x] = imageHistogram[x][b.Height - 1];
if (x > 0)
colHistogram[x] += colHistogram[x - 1];
for (int y = 0; y < b.Height; y++)
imageHistogram[x][y] /= imageHistogram[x][b.Height - 1];
}
for (int x = 0; x < b.Width; x++)
colHistogram[x] /= colHistogram[b.Width - 1];
jacobian = (float) (2 * Math.PI * Math.PI) / (b.Width * b.Height);
}
// take fixed samples
if (pl.getbool("fixed", samples != null)) {
// Bitmap loc = new Bitmap(filename);
samples = new Vector3[numSamples];
colors = new Color[numSamples];
for (int i = 0; i < numSamples; i++) {
double randX = (double) i / (double) numSamples;
double randY = QMC.halton(0, i);
int x = 0;
while (randX >= colHistogram[x] && x < colHistogram.Length - 1)
x++;
float[] rowHistogram = imageHistogram[x];
int y = 0;
while (randY >= rowHistogram[y] && y < rowHistogram.Length - 1)
y++;
// sample from (x, y)
float u = (float) ((x == 0) ? (randX / colHistogram[0]) : ((randX - colHistogram[x - 1]) / (colHistogram[x] - colHistogram[x - 1])));
float v = (float) ((y == 0) ? (randY / rowHistogram[0]) : ((randY - rowHistogram[y - 1]) / (rowHistogram[y] - rowHistogram[y - 1])));
float px = ((x == 0) ? colHistogram[0] : (colHistogram[x] - colHistogram[x - 1]));
float py = ((y == 0) ? rowHistogram[0] : (rowHistogram[y] - rowHistogram[y - 1]));
float su = (x + u) / colHistogram.Length;
float sv = (y + v) / rowHistogram.Length;
float invP = (float) Math.Sin(sv * Math.PI) * jacobian / (numSamples * px * py);
samples[i] = getDirection(su, sv);
basis.transform(samples[i]);
colors[i] = texture.getPixel(su, sv).mul(invP);
// loc.setPixel(x, y, Color.YELLOW.copy().mul(1e6f));
}
// loc.save("samples.hdr");
} else {
// turn off
samples = null;
colors = null;
}
return true;
}
public bool Update(ParameterList pl, SunflowAPI api)
{
diff = pl.getColor("diffuse", diff);
spec = pl.getColor("specular", spec);
string filename;
filename = pl.getstring("diffuse.texture", null);
if (filename != null)
diffmap = TextureCache.getTexture(api.resolveTextureFilename(filename), false);
filename = pl.getstring("specular.texture", null);
if (filename != null)
specmap = TextureCache.getTexture(api.resolveTextureFilename(filename), false);
diffBlend = MathUtils.clamp(pl.getFloat("diffuse.blend", diffBlend), 0, 1);
specBlend = MathUtils.clamp(pl.getFloat("specular.blend", diffBlend), 0, 1);
glossyness = MathUtils.clamp(pl.getFloat("glossyness", glossyness), 0, 1);
numSamples = pl.getInt("samples", numSamples);
return true;
}
public TexturedAmbientOcclusionShader()
{
tex = null;
}
public TexturedPhongShader()
{
tex = null;
}
public TexturedShinyDiffuseShader()
{
tex = null;
}
public TexturedWardShader()
{
tex = null;
}
public BumpMappingModifier()
{
bumpTexture = null;
scale = 1;
}
public bool Update(ParameterList pl, SunflowAPI api)
{
updateBasis(pl.getVector("center", null), pl.getVector("up", null));
numSamples = pl.getInt("samples", numSamples);
numLowSamples = pl.getInt("lowsamples", numLowSamples);
string filename = pl.getstring("texture", null);
if (filename != null)
texture = TextureCache.getTexture(api.resolveTextureFilename(filename), false);
// no texture provided
if (texture == null)
return false;
Bitmap b = texture.getBitmap();
if (b == null)
return false;
// rebuild histograms if this is a new texture
if (filename != null) {
imageHistogram = new float[b.getWidth()][];
for(int i = 0;i < imageHistogram.Length;i++)
imageHistogram[i] = new float[b.getHeight()];
colHistogram = new float[b.getWidth()];
float du = 1.0f / b.getWidth();
float dv = 1.0f / b.getHeight();
for (int x = 0; x < b.getWidth(); x++) {
for (int y = 0; y < b.getHeight(); y++) {
float u = (x + 0.5f) * du;
float v = (y + 0.5f) * dv;
Color c = texture.getPixel(u, v);
imageHistogram[x][y] = c.getLuminance() * (float) Math.Sin(Math.PI * v);
if (y > 0)
imageHistogram[x][y] += imageHistogram[x][y - 1];
}
colHistogram[x] = imageHistogram[x][b.getHeight() - 1];
if (x > 0)
colHistogram[x] += colHistogram[x - 1];
for (int y = 0; y < b.getHeight(); y++)
imageHistogram[x][y] /= imageHistogram[x][b.getHeight() - 1];
}
for (int x = 0; x < b.getWidth(); x++)
colHistogram[x] /= colHistogram[b.getWidth() - 1];
jacobian = (float) (2 * Math.PI * Math.PI) / (b.getWidth() * b.getHeight());
}
// take fixed samples
if (pl.getbool("fixed", samples != null)) {
// high density samples
samples = new Vector3[numSamples];
colors = new Color[numSamples];
generateFixedSamples(samples, colors);
// low density samples
lowSamples = new Vector3[numLowSamples];
lowColors = new Color[numLowSamples];
generateFixedSamples(lowSamples, lowColors);
} else {
// turn off
samples = lowSamples = null;
colors = lowColors = null;
}
return true;
}
