public void textureTerrain(TextureProgressDelegate textureProgressDelegate)
{
Terrain ter = (Terrain) GetComponent(typeof(Terrain));
if (ter == null) {
return;
}
TerrainData terData = ter.terrainData;
splatPrototypes = terData.splatPrototypes;
int nTextures = splatPrototypes.Length;
if (nTextures < 2) {
Debug.LogError("Error: You must assign at least 2 textures.");
return;
}
textureProgressDelegate("Procedural Terrain Texture", "Generating height and slope maps. Please wait.", 0.1f);
int Tw = terData.heightmapWidth - 1;
int Th = terData.heightmapHeight - 1;
float[,] heightMapData = new float[Tw, Th];
float[,] slopeMapData = new float[Tw, Th];
float[,,] splatMapData;
terData.alphamapResolution = Tw;
splatMapData = terData.GetAlphamaps(0, 0, Tw, Tw);
// Angles to difference...
Vector3 terSize = terData.size;
float slopeBlendMinimum = ((terSize.x / Tw) * Mathf.Tan(slopeBlendMinAngle * Mathf.Deg2Rad)) / terSize.y;
float slopeBlendMaximum = ((terSize.x / Tw) * Mathf.Tan(slopeBlendMaxAngle * Mathf.Deg2Rad)) / terSize.y;
try {
float greatestHeight = 0.0f;
int xNeighbours;
int yNeighbours;
int xShift;
int yShift;
int xIndex;
int yIndex;
float[,] heightMap = terData.GetHeights(0, 0, Tw, Th);
for (int Ty = 0; Ty < Th; Ty++) {
// y...
if (Ty == 0) {
yNeighbours = 2;
yShift = 0;
yIndex = 0;
} else if (Ty == Th - 1) {
yNeighbours = 2;
yShift = -1;
yIndex = 1;
} else {
yNeighbours = 3;
yShift = -1;
yIndex = 1;
}
for (int Tx = 0; Tx < Tw; Tx++) {
// x...
if (Tx == 0) {
xNeighbours = 2;
xShift = 0;
xIndex = 0;
} else if (Tx == Tw - 1) {
xNeighbours = 2;
xShift = -1;
xIndex = 1;
} else {
xNeighbours = 3;
xShift = -1;
xIndex = 1;
}
// Get height...
float h = heightMap[Tx + xIndex + xShift, Ty + yIndex + yShift];
if (h > greatestHeight) {
greatestHeight = h;
}
// ...and apply to height map...
heightMapData[Tx, Ty] = h;
// Calculate slope...
float tCumulative = 0.0f;
float nNeighbours = xNeighbours * yNeighbours - 1;
int Ny;
int Nx;
float t;
for (Ny = 0; Ny < yNeighbours; Ny++) {
for (Nx = 0; Nx < xNeighbours; Nx++) {
// Ignore the index...
if (Nx != xIndex || Ny != yIndex) {
t = Mathf.Abs(h - heightMap[Tx + Nx + xShift, Ty + Ny + yShift]);
tCumulative += t;
}
}
}
float tAverage = tCumulative / nNeighbours;
// ...and apply to the slope map...
slopeMapData[Tx, Ty] = tAverage;
}
// Show progress...
// float completePoints = Ty * Th;
// float totalPoints = Tw * Th;
// float percentComplete = (completePoints / totalPoints) * 0.6f;
// textureProgressDelegate("Procedural Terrain Texture", "Generating height and slope maps. Please wait.", percentComplete);
}
// Blend slope...
float sBlended;
int Px;
int Py;
for (Py = 0; Py < Th; Py++) {
for (Px = 0; Px < Tw; Px++) {
sBlended = slopeMapData[Px, Py];
if (sBlended < slopeBlendMinimum) {
sBlended = 0;
} else if (sBlended < slopeBlendMaximum) {
sBlended = (sBlended - slopeBlendMinimum) / (slopeBlendMaximum - slopeBlendMinimum);
} else if (sBlended > slopeBlendMaximum) {
sBlended = 1;
}
slopeMapData[Px, Py] = sBlended;
splatMapData[Px, Py, 0] = sBlended;
}
}
// Blend height maps...
for (int i = 1; i < nTextures; i++) {
for (Py = 0; Py < Th; Py++) {
for (Px = 0; Px < Tw; Px++) {
float hBlendInMinimum = 0;
float hBlendInMaximum = 0;
float hBlendOutMinimum = 1;
float hBlendOutMaximum = 1;
float hValue;
float hBlended = 0;
if (i > 1) {
hBlendInMinimum = (float) heightBlendPoints[i * 2 - 4];
hBlendInMaximum = (float) heightBlendPoints[i * 2 - 3];
}
if (i < nTextures - 1) {
hBlendOutMinimum = (float) heightBlendPoints[i * 2 - 2];
hBlendOutMaximum = (float) heightBlendPoints[i * 2 - 1];
}
hValue = heightMapData[Px, Py];
if (hValue >= hBlendInMaximum && hValue <= hBlendOutMinimum) {
// Full...
hBlended = 1;
} else if (hValue >= hBlendInMinimum && hValue < hBlendInMaximum) {
// Blend in...
hBlended = (hValue - hBlendInMinimum) / (hBlendInMaximum - hBlendInMinimum);
} else if (hValue > hBlendOutMinimum && hValue <= hBlendOutMaximum) {
// Blend out...
hBlended = 1 - ((hValue - hBlendOutMinimum) / (hBlendOutMaximum - hBlendOutMinimum));
}
// Subtract slope...
float sValue = slopeMapData[Px, Py];
hBlended -= sValue;
if (hBlended < 0) {
hBlended = 0;
}
splatMapData[Px, Py, i] = hBlended;
}
}
}
// Generate splat maps...
textureProgressDelegate("Procedural Terrain Texture", "Generating splat map. Please wait.", 0.9f);
terData.SetAlphamaps(0, 0, splatMapData);
// Clean up...
heightMapData = null;
slopeMapData = null;
splatMapData = null;
}
catch (Exception e) {
// Clean up...
heightMapData = null;
slopeMapData = null;
splatMapData = null;
Debug.LogError("An error occurred: "+e);
}
}
public void TextureTerrain(float[] slopeStops, float[] heightStops, Texture2D[] textures)
{
if (slopeStops.Length != 2) {
Debug.LogError("Error: slopeStops must have 2 values");
return;
}
if (heightStops.Length > 8) {
Debug.LogError("Error: heightStops must have no more than 8 values");
return;
}
if (heightStops.Length % 2 != 0) {
Debug.LogError("Error: heightStops must have an even number of values");
return;
}
int numTextures = textures.Length;
int numTexturesByStops = (heightStops.Length / 2) + 2;
if (numTextures != numTexturesByStops) {
Debug.LogError("Error: heightStops contains an incorrect number of values");
return;
}
foreach (float stop in slopeStops) {
if (stop < 0 || stop > 90) {
Debug.LogError("Error: The value of all slopeStops must be in the range 0.0 to 90.0");
return;
}
}
foreach (float stop in heightStops) {
if (stop < 0 || stop > 1) {
Debug.LogError("Error: The value of all heightStops must be in the range 0.0 to 1.0");
return;
}
}
Terrain ter = (Terrain) GetComponent(typeof(Terrain));
TerrainData terData = ter.terrainData;
splatPrototypes = terData.splatPrototypes;
deleteAllSplatPrototypes();
int n = 0;
foreach (Texture2D tex in textures) {
addSplatPrototype(tex, n);
n++;
}
slopeBlendMinAngle = slopeStops[0];
slopeBlendMaxAngle = slopeStops[1];
n = 0;
foreach (float stop in heightStops) {
heightBlendPoints[n] = stop;
n++;
}
terData.splatPrototypes = splatPrototypes;
TextureProgressDelegate textureProgressDelegate = new TextureProgressDelegate(dummyTextureProgress);
textureTerrain(textureProgressDelegate);
}