指定されたマップ領域のすべての splat 値を割り当てます。
この関数で指定された配列は 置き換える位置の width と height を決定し、配列の 3 番目の次元は splatmap のテクスチャの数に対応しています。
// Blend the two terrain textures according to the steepness of
// the slope at each point.
function Start () {
var map: float[,,] = new float[t.terrainData.alphamapWidth, t.terrainData.alphamapHeight, 2];
// For each point on the alphamap...
for (var y = 0; y < t.terrainData.alphamapHeight; y++) {
for (var x = 0; x < t.terrainData.alphamapWidth; x++) {
// Get the normalized terrain coordinate that
// corresponds to the the point.
var normX = x * 1.0 / (t.terrainData.alphamapWidth - 1);
var normY = y * 1.0 / (t.terrainData.alphamapHeight - 1);
// Get the steepness value at the normalized coordinate.
var angle = t.terrainData.GetSteepness(normX, normY);
// Steepness is given as an angle, 0..90 degrees. Divide
// by 90 to get an alpha blending value in the range 0..1.
var frac = angle / 90.0;
map[x, y, 0] = frac;
map[x, y, 1] = 1 - frac;
}
}
t.terrainData.SetAlphamaps(0, 0, map);
}