public Bitmap TerrainToBitmap (Bitmap mapbmp)
{
FastBitmap unsafeBMP = new FastBitmap (mapbmp);
unsafeBMP.LockBitmap ();
//DateTime start = DateTime.Now;
//MainConsole.Instance.Info("[MAPTILE]: Generating Maptile Step 1: Terrain");
// These textures should be in the AssetCache anyway, as every client connecting to this
// region needs them. Except on start, when the map is recreated (before anyone connected),
// and on change of the estate settings (textures and terrain values), when the map should
// be recreated.
RegionSettings settings = m_scene.RegionInfo.RegionSettings;
// the four terrain colors as HSVs for interpolation
HSV hsv1 = new HSV (computeAverageColor (settings.TerrainTexture1, defaultColor1));
HSV hsv2 = new HSV (computeAverageColor (settings.TerrainTexture2, defaultColor2));
HSV hsv3 = new HSV (computeAverageColor (settings.TerrainTexture3, defaultColor3));
HSV hsv4 = new HSV (computeAverageColor (settings.TerrainTexture4, defaultColor4));
float levelNElow = (float)settings.Elevation1NE;
float levelNEhigh = (float)settings.Elevation2NE;
float levelNWlow = (float)settings.Elevation1NW;
float levelNWhigh = (float)settings.Elevation2NW;
float levelSElow = (float)settings.Elevation1SE;
float levelSEhigh = (float)settings.Elevation2SE;
float levelSWlow = (float)settings.Elevation1SW;
float levelSWhigh = (float)settings.Elevation2SW;
float waterHeight = (float)settings.WaterHeight;
ITerrainChannel heightmap = m_scene.RequestModuleInterface<ITerrainChannel> ();
float sizeRatio = m_scene.RegionInfo.RegionSizeX / (float)Constants.RegionSize;
for (float y = 0; y < m_scene.RegionInfo.RegionSizeY; y += sizeRatio) {
float rowRatio = y / (m_scene.RegionInfo.RegionSizeY - 1); // 0 - 1, for interpolation
for (float x = 0; x < m_scene.RegionInfo.RegionSizeX; x += sizeRatio) {
float columnRatio = x / (m_scene.RegionInfo.RegionSizeX - 1); // 0 - 1, for interpolation
float heightvalue = getHeight (heightmap, (int)x, (int)y);
if (heightvalue > waterHeight) {
// add a bit noise for breaking up those flat colors:
// - a large-scale noise, for the "patches" (using an doubled s-curve for sharper contrast)
// - a small-scale noise, for bringing in some small scale variation
//float bigNoise = (float)TerrainUtil.InterpolatedNoise(x / 8.0, y / 8.0) * .5f + .5f; // map to 0.0 - 1.0
//float smallNoise = (float)TerrainUtil.InterpolatedNoise(x + 33, y + 43) * .5f + .5f;
//float hmod = heightvalue + smallNoise * 3f + S(S(bigNoise)) * 10f;
float hmod =
heightvalue; // 0 - 10
// find the low/high values for this point (interpolated bilinearily)
// (and remember, x=0,y=0 is SW)
float low = levelSWlow * (1f - rowRatio) * (1f - columnRatio) +
levelSElow * (1f - rowRatio) * columnRatio +
levelNWlow * rowRatio * (1f - columnRatio) +
levelNElow * rowRatio * columnRatio;
float high = levelSWhigh * (1f - rowRatio) * (1f - columnRatio) +
levelSEhigh * (1f - rowRatio) * columnRatio +
levelNWhigh * rowRatio * (1f - columnRatio) +
levelNEhigh * rowRatio * columnRatio;
if (high < low) {
// someone tried to fool us. High value should be higher than low every time
float tmp = high;
high = low;
low = tmp;
}
HSV hsv;
if (hmod <= low) hsv = hsv1; // too low
else if (hmod >= high) hsv = hsv4; // too high
else {
// HSV-interpolate along the colors
// first, rescale h to 0.0 - 1.0
hmod = (hmod - low) / (high - low);
// now we have to split: 0.00 => color1, 0.33 => color2, 0.67 => color3, 1.00 => color4
if (hmod < 1f / 3f) hsv = interpolateHSV (ref hsv1, ref hsv2, hmod * 3f);
else if (hmod < 2f / 3f) hsv = interpolateHSV (ref hsv2, ref hsv3, (hmod * 3f) - 1f);
else hsv = interpolateHSV (ref hsv3, ref hsv4, (hmod * 3f) - 2f);
}
//get the data from the original image
Color hsvColor = hsv.ToColor ();
unsafeBMP.SetPixel ((int)(x / sizeRatio),
(int)(((m_scene.RegionInfo.RegionSizeY - 1) - y) / sizeRatio), hsvColor);
} else {
// We're under the water level with the terrain, so paint water instead of land
unsafeBMP.SetPixel ((int)(x / sizeRatio),
(int)(((m_scene.RegionInfo.RegionSizeY - 1) - y) / sizeRatio), WATER_COLOR);
}
}
}
if (m_mapping != null) {
SaveCache ();
m_mapping.Clear ();
}
unsafeBMP.UnlockBitmap ();
//MainConsole.Instance.Info("[MAPTILE]: Generating Maptile Step 1: Done in " + (DateTime.Now - start).TotalSeconds + " ms");
return unsafeBMP.Bitmap ();
}
// interpolate two colors in HSV space and return the resulting color
static HSV interpolateHSV (ref HSV c1, ref HSV c2, float ratio)
{
if (ratio <= 0f) return c1;
if (ratio >= 1f) return c2;
// make sure we are on the same side on the hue-circle for interpolation
// We change the hue of the parameters here, but we don't change the color
// represented by that value
if (c1.h - c2.h > 180f) c1.h -= 360f;
else if (c2.h - c1.h > 180f) c1.h += 360f;
return new HSV (c1.h * (1f - ratio) + c2.h * ratio,
c1.s * (1f - ratio) + c2.s * ratio,
c1.v * (1f - ratio) + c2.v * ratio);
}
public Bitmap TerrainToBitmap(Bitmap mapbmp)
{
FastBitmap unsafeBMP = new FastBitmap(mapbmp);
unsafeBMP.LockBitmap();
//MainConsole.Instance.Info("[MAPTILE]: Generating Maptile Step 1: Terrain");
// These textures should be in the AssetCache anyway, as every client conneting to this
// region needs them. Except on start, when the map is recreated (before anyone connected),
// and on change of the estate settings (textures and terrain values), when the map should
// be recreated.
RegionSettings settings = m_scene.RegionInfo.RegionSettings;
// the four terrain colors as HSVs for interpolation
HSV hsv1 = new HSV(computeAverageColor(settings.TerrainTexture1, defaultColor1));
HSV hsv2 = new HSV(computeAverageColor(settings.TerrainTexture2, defaultColor2));
HSV hsv3 = new HSV(computeAverageColor(settings.TerrainTexture3, defaultColor3));
HSV hsv4 = new HSV(computeAverageColor(settings.TerrainTexture4, defaultColor4));
float levelNElow = (float)settings.Elevation1NE;
float levelNEhigh = (float)settings.Elevation2NE;
float levelNWlow = (float)settings.Elevation1NW;
float levelNWhigh = (float)settings.Elevation2NW;
float levelSElow = (float)settings.Elevation1SE;
float levelSEhigh = (float)settings.Elevation2SE;
float levelSWlow = (float)settings.Elevation1SW;
float levelSWhigh = (float)settings.Elevation2SW;
float waterHeight = (float)settings.WaterHeight;
ITerrainChannel heightmap = m_scene.RequestModuleInterface <ITerrainChannel>();
float sizeRatio = m_scene.RegionInfo.RegionSizeX / (float)Constants.RegionSize;
for (float y = 0; y < m_scene.RegionInfo.RegionSizeY; y += sizeRatio)
{
float rowRatio = y / (m_scene.RegionInfo.RegionSizeY - 1); // 0 - 1, for interpolation
for (float x = 0; x < m_scene.RegionInfo.RegionSizeX; x += sizeRatio)
{
float columnRatio = x / (m_scene.RegionInfo.RegionSizeX - 1); // 0 - 1, for interpolation
float heightvalue = getHeight(heightmap, (int)x, (int)y);
if (heightvalue > waterHeight)
{
// add a bit noise for breaking up those flat colors:
// - a large-scale noise, for the "patches" (using an doubled s-curve for sharper contrast)
// - a small-scale noise, for bringing in some small scale variation.
float hmod =
heightvalue; // 0 - 10
// find the low/high values for this point (interpolated bilinearily)
// (and remember, x=0,y=0 is SW)
float low = levelSWlow * (1f - rowRatio) * (1f - columnRatio) +
levelSElow * (1f - rowRatio) * columnRatio +
levelNWlow * rowRatio * (1f - columnRatio) +
levelNElow * rowRatio * columnRatio;
float high = levelSWhigh * (1f - rowRatio) * (1f - columnRatio) +
levelSEhigh * (1f - rowRatio) * columnRatio +
levelNWhigh * rowRatio * (1f - columnRatio) +
levelNEhigh * rowRatio * columnRatio;
if (high < low)
{
// someone tried to fool us. High value should be higher than low every time
float tmp = high;
high = low;
low = tmp;
}
HSV hsv;
if (hmod <= low)
{
hsv = hsv1; // too low
}
else if (hmod >= high)
{
hsv = hsv4; // too high
}
else
{
// HSV-interpolate along the colors
// first, rescale h to 0.0 - 1.0
hmod = (hmod - low) / (high - low);
// now we have to split: 0.00 => color1, 0.33 => color2, 0.67 => color3, 1.00 => color4
if (hmod < 1f / 3f)
{
hsv = interpolateHSV(ref hsv1, ref hsv2, hmod * 3f);
}
else if (hmod < 2f / 3f)
{
hsv = interpolateHSV(ref hsv2, ref hsv3, (hmod * 3f) - 1f);
}
else
{
hsv = interpolateHSV(ref hsv3, ref hsv4, (hmod * 3f) - 2f);
}
}
//get the data from the original image
Color hsvColor = hsv.toColor();
unsafeBMP.SetPixel((int)(x / sizeRatio),
(int)(((m_scene.RegionInfo.RegionSizeY - 1) - y) / sizeRatio), hsvColor);
}
else
{
// We're under the water level with the terrain, so paint water instead of land
unsafeBMP.SetPixel((int)(x / sizeRatio),
(int)(((m_scene.RegionInfo.RegionSizeY - 1) - y) / sizeRatio), WATER_COLOR);
}
}
}
if (m_mapping != null)
{
SaveCache();
m_mapping.Clear();
}
unsafeBMP.UnlockBitmap();
//MainConsole.Instance.Info("[MAPTILE]: Generating Maptile Step 1: Done in " + (DateTime.Now - start).TotalSeconds + " ms");
return(unsafeBMP.Bitmap());
}