private Vector3 DownRight(Vector3 center, RiverData.Direction dir)
{
Vector3 result = new Vector3();
switch (dir)
{
case RiverData.Direction.Up:
result.x = center.x + 0.5f;
result.z = center.z - 0.5f;
break;
case RiverData.Direction.Right:
result.x = center.x - 0.5f;
result.z = center.z - 0.5f;
break;
case RiverData.Direction.Down:
result.x = center.x - 0.5f;
result.z = center.z + 0.5f;
break;
case RiverData.Direction.Left:
result.x = center.x + 0.5f;
result.z = center.z + 0.5f;
break;
}
return(result);
}
private Vector3 PointSDir(Vector3 ori, RiverData.Direction a, RiverData.Direction b)
{
Vector3 result = new Vector3(ori.x, ori.y, ori.z);
var amodify = RiverData.GetDirectionDir(a);
var bmodify = RiverData.GetDirectionDir(b);
result += amodify / 2;
result += bmodify / 2;
return(result);
}
private Vector3 DownRightEx(Vector3 center, RiverData.Direction dir)
{
Vector3 result = new Vector3();
var vector = RiverData.GetDirectionDir(dir);
var noiseDir = (NoiseVector(center)).normalized;
var direx = (-vector + noiseDir).normalized;
var dirleft = Vector3.Cross(direx, Vector3.up);
result = center + (direx + dirleft) * 0.5f;
return(result);
}
private Vector3 BorderLeftEx(Vector3 center, RiverData.Direction dir)
{
Vector3 result = new Vector3();
var vector = RiverData.GetDirectionDir(dir);
var noiseModify = NoiseModify(center);
//Vector3 noiseDir = new Vector3(noiseModify.x - center.x, 0, noiseModify.z - center.z);
var noiseDir = (NoiseVector(center)).normalized;
var direx = (vector + noiseDir).normalized;
var dirleft = Vector3.Cross(direx, Vector3.up);
result = center + (direx + dirleft) * 0.5f;
return(result);
}
private Vector3 NoiseModify(Vector3 kOri, float diff, RiverData.Direction oriDir)
{
Vector3 result = new Vector3(kOri.x, kOri.y, kOri.z);
double twoPi = Math.PI * 2f;
double T = 4.0;
double a = kOri.x * twoPi / (T);
double b = kOri.z * twoPi / (T);
diff *= kNoisePercent;
//float diff = (float)(Math.Sin(a) + Math.Sin(b)) * kNoisePercent;
switch (oriDir)
{
case RiverData.Direction.Up:
{
result.x += diff;
}
break;
case RiverData.Direction.Down:
{
result.x += diff;
}
break;
case RiverData.Direction.Right:
{
result.z += diff;
}
break;
case RiverData.Direction.Left:
{
result.z += diff;
}
break;
}
return(result);
}
private void GetPointsFromFlowDirAtTwo(RiverData.Direction predir, RiverData.Direction curdir, Vector3 pos, ref List <Vector3> left, ref List <Vector3> right)
{
if (predir == curdir || predir == RiverData.Direction.NotExist)
{
var r1 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Right));
var r2 = PointSDir(pos, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Right), RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Down));
var l1 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Left));
var l2 = PointSDir(pos, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Left), RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Down));
left.Add(l2);
left.Add(l1);
right.Add(r2);
right.Add(r1);
}
else
{
var diffdir = RiverData.ThisDirisOrisDirsDir(curdir, predir);
switch (diffdir)
{
case RiverData.Direction.Left:
{
var r1 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Right));
var r2 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Down));
var r3 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Left));
var l1 = PointSDir(pos, curdir, RiverData.GetTargetDirsDir(curdir, RiverData.Direction.Down));
}
break;
case RiverData.Direction.Right:
{
}
break;
}
}
}
private void AddEightVertice(Vector3 downl, Vector3 l, Vector3 r, Vector3 downr, Color a, RiverData.Direction diff = RiverData.Direction.NotExist)
{
kBoundsPoints.Clear();
kBoundsPoints.Add(l);
kBoundsPoints.Add(r);
var l1 = ModifyVector(LerpPos(downl, l, 0.66f));
var l2 = ModifyVector(LerpPos(downl, l, 0.33f));
var r1 = ModifyVector(LerpPos(downr, r, 0.66f));
var r2 = ModifyVector(LerpPos(downr, r, 0.33f));
if (diff == RiverData.Direction.Left)
{
var dir1 = r1 - l1;
var dir2 = r2 - l2;
r1 = ModifyVector(l1 + dir1 * 1.4f);
r2 = ModifyVector(l2 + dir2 * 1.4f);
}
else if (diff == RiverData.Direction.Right)
{
var dir1 = l1 - r1;
var dir2 = l2 - r2;
l1 = ModifyVector(r1 + dir1 * 1.4f);
l2 = ModifyVector(r2 + dir2 * 1.4f);
}
vertices.Add(downl);
vertices.Add(l1);
vertices.Add(l2);
vertices.Add(l);
vertices.Add(r);
vertices.Add(r2);
vertices.Add(r1);
vertices.Add(downr);
triangles.Add(verticesOffset + 0);
triangles.Add(verticesOffset + 6);
triangles.Add(verticesOffset + 7);
triangles.Add(verticesOffset + 0);
triangles.Add(verticesOffset + 1);
triangles.Add(verticesOffset + 6);
triangles.Add(verticesOffset + 1);
triangles.Add(verticesOffset + 5);
triangles.Add(verticesOffset + 6);
triangles.Add(verticesOffset + 1);
triangles.Add(verticesOffset + 2);
triangles.Add(verticesOffset + 5);
triangles.Add(verticesOffset + 2);
triangles.Add(verticesOffset + 4);
triangles.Add(verticesOffset + 5);
triangles.Add(verticesOffset + 2);
triangles.Add(verticesOffset + 3);
triangles.Add(verticesOffset + 4);
colors.Add(a);
colors.Add(a);
colors.Add(a);
colors.Add(a);
colors.Add(a);
colors.Add(a);
colors.Add(a);
colors.Add(a);
uvs.Add(new Vector2(1, 1));
uvs.Add(new Vector2(1, 0.66f));
uvs.Add(new Vector2(1, 0.33f));
uvs.Add(new Vector2(1, 0));
uvs.Add(new Vector2(0, 0));
uvs.Add(new Vector2(0, 0.33f));
uvs.Add(new Vector2(0, 0.66f));
uvs.Add(new Vector2(0, 1));
tangles.Add(new Vector4(1, 1, 0, 0));
tangles.Add(new Vector4(1, 0.66f, 0, 0));
tangles.Add(new Vector4(1, 0.33f, 0, 0));
tangles.Add(new Vector4(1, 0, 0, 0));
tangles.Add(new Vector4(0, 0, 0, 0));
tangles.Add(new Vector4(0, 0.33f, 0, 0));
tangles.Add(new Vector4(0, 0.66f, 0, 0));
tangles.Add(new Vector4(0, 1, 0, 0));
verticesOffset += 8;
}
private Vector3 ModifyVector(Vector3 kOri, float diff, RiverData.Direction oriDir)
{
return(HeightSample(NoiseModify(kOri, diff, oriDir)));
}
