private void CalculateHeight(SgtVector3D localPosition, ref double height)
{
if (Heightmap != null)
{
var uv = SgtHelper.CartesianToPolarUV((Vector3)localPosition);
var color = SampleBilinear(uv);
var height01 = default(double);
switch (Encoding)
{
case EncodingType.Alpha:
{
height01 = color.a;
}
break;
case EncodingType.RedGreen:
{
height01 = (color.r * 255.0 + color.g) / 256.0;
}
break;
}
height += DisplacementMin + (DisplacementMax - DisplacementMin) * height01;
}
}
private void CalculateHeight(SgtVector3D localPosition, ref double height)
{
localPosition /= localPosition.magnitude;
localPosition *= Frequency;
var contribution = 0.0;
var weight = 1.0;
for (var i = 0; i < Octaves; i++)
{
contribution += generators[i].Generate((float)localPosition.x, (float)localPosition.y, (float)localPosition.z) * weight;
localPosition *= 2.0;
weight *= 0.5;
}
// Scale maximum constribution to -2..2
contribution *= scale * 2.0;
// Abs to 0 .. 2
if (contribution < 0.0)
{
contribution = -contribution;
}
if (Invert == true)
{
contribution = 2.0 - contribution;
}
// Scale and add
height += contribution * Amplitude;
}
public void Spawn(SgtTerrain terrain, SgtTerrainFace face, SgtVector3D localPoint)
{
if (OnSpawn != null)
{
OnSpawn();
}
transform.SetParent(face.transform, false);
// Snap to surface
localPoint = terrain.GetLocalPoint(localPoint);
// Rotate up
var up = Quaternion.Euler(0.0f, Random.Range(0.0f, 360.0f), 0.0f) * Vector3.up;
// Spawn on surface
var twist = Quaternion.Euler(0.0f, Random.Range(0.0f, 360.0f), 0.0f);
transform.localPosition = (Vector3)localPoint;
transform.localRotation = Quaternion.FromToRotation(up, terrain.transform.TransformDirection(transform.localPosition)) * twist;
transform.localScale = Prefab.transform.localScale * Random.Range(ScaleMin, ScaleMax);
//transform.rotation = Quaternion.FromToRotation(up, terrain.transform.TransformDirection(localPosition));
if (AlignToNormal != 0.0f)
{
var localRight = transform.right * AlignToNormal;
var localForward = transform.forward * AlignToNormal;
var localNormal = terrain.GetLocalNormal(localPoint, new SgtVector3D(localRight), new SgtVector3D(localForward));
transform.rotation = Quaternion.FromToRotation(up, (Vector3)localNormal) * twist;
}
}
private void CalculateLocalValues()
{
LocalPoints.Clear();
if (Targets != null)
{
for (var i = Targets.Count - 1; i >= 0; i--)
{
var target = Targets[i];
if (target != null)
{
var point = new SgtVector3D(transform.InverseTransformPoint(target.position));
LocalPoints.Add(point);
}
}
}
LocalDistances.Clear();
for (var i = 0; i < 32; i++)
{
if (Distances != null && i < Distances.Count)
{
var distance = Distances[i];
LocalDistances.Add(distance * distance);
}
else
{
LocalDistances.Add(double.NegativeInfinity);
}
}
}
public SgtTerrainCompute.Output SampleLocalOutput(SgtVector3D localPoint)
{
SgtTerrainCompute.BeginPoint(ForceCPU);
SgtTerrainCompute.SetMain(Radius, NormalStep, NormalStrength, HeightMap, HeightScale);
SgtTerrainCompute.SetDetail(MaskMap, DetailTiling, DetailMapA, DetailScaleA, DetailMapA, DetailScaleB);
return(SgtTerrainCompute.DispatchPoint((Vector3)localPoint));
}
/*
* public static bool Overlap(SgtVector3D a, SgtVector3D b, SgtVector3D p, double eps = 0.00001)
* {
* var ba = b - a;
* var baba = Dot(ba, ba);
*
* if (baba != 0.0f)
* {
* var d = Dot(p - a, ba) / baba;
*
* if (d >= -eps && d <= 1.0f + eps)
* {
* var z = (a + ba * d) - p;
*
* return z.sqrMagnitude <= eps * eps;
* }
* }
*
* return false;
* }
*/
public static double SquareDistance(SgtVector3D a, SgtVector3D b)
{
a.x -= b.x;
a.y -= b.y;
a.z -= b.z;
return(a.x * a.x + a.y * a.y + a.z * a.z);
}
public Vector3 GetWorldPoint(Vector3 position)
{
var localPosition = transform.InverseTransformPoint(position);
var localPoint = new SgtVector3D(localPosition);
localPoint = GetLocalPoint(localPoint);
return(transform.TransformPoint((Vector3)localPoint));
}
public SgtVector3D GetLocalNormal(SgtVector3D point, SgtVector3D right, SgtVector3D up)
{
var localPoint = GetLocalPoint(point);
var localPointR = GetLocalPoint(localPoint + right);
var localPointU = GetLocalPoint(localPoint - up);
var vectorR = localPointR - localPoint;
var vectorU = localPointU - localPoint;
return(SgtVector3D.Cross(vectorR, vectorU).normalized);
}
// Gets the surface height under the input point in local space
public double GetLocalHeight(SgtVector3D localPoint)
{
var height = Radius;
if (OnCalculateHeight != null)
{
OnCalculateHeight(localPoint.normalized * Radius, ref height);
}
return(height);
}
public static bool Overlap(SgtVector3D a, SgtVector3D b, SgtVector3D p, float eps = 0.001f)
{
var ba = b - a;
var d = Dot(p - a, ba) / Dot(ba, ba);
if (d >= -eps && d <= 1.0f + eps)
{
var z = (a + ba * d) - p;
return(z.sqrMagnitude <= eps * eps);
}
return(false);
}
private SgtTerrainFace Create(string childName, SgtVector3D cornerBL, SgtVector3D cornerBR, SgtVector3D cornerTL, SgtVector3D cornerTR)
{
var face = Create(childName, gameObject.layer, transform);
face.Terrain = Terrain;
face.Side = Side;
face.Depth = Depth + 1;
face.CornerBL = cornerBL;
face.CornerBR = cornerBR;
face.CornerTL = cornerTL;
face.CornerTR = cornerTR;
return(face);
}
private SgtVector3D GetPosition(SgtVector3D origin, SgtVector3D sideDelta, SgtVector3D edgeDelta)
{
var eps = 0.00000001;
var position = origin + sideDelta;
// Wrap position around cube if it goes off the edge
if (position.x < -1.0 - eps || position.x > 1.0 + eps || position.y < -1.0 - eps || position.y > 1.0 + eps || position.z < -1.0 - eps || position.z > 1.0 + eps)
{
position = origin + edgeDelta;
}
position = position.normalized * Terrain.GetLocalHeight(position);
return(position);
}
public static void SetFaceCorners(CubemapFace side, SgtVector3D cornerBL, SgtVector3D cornerBR, SgtVector3D cornerTL)
{
if (computeSupported == true && computeDisable == false)
{
computeShader.SetInt(SgtShader._Side, (int)side);
computeShader.SetVector(SgtShader._CornerBL, (Vector3)cornerBL);
computeShader.SetVector(SgtShader._CornerBR, (Vector3)cornerBR);
computeShader.SetVector(SgtShader._CornerTL, (Vector3)cornerTL);
}
else
{
_Side = (int)side;
_CornerBL = (Vector3)cornerBL;
_CornerBR = (Vector3)cornerBR;
_CornerTL = (Vector3)cornerTL;
}
}
private SgtTerrainFace CreateFace(CubemapFace side, SgtVector3D cornerBL, SgtVector3D cornerBR, SgtVector3D cornerTL, SgtVector3D cornerTR)
{
var face = SgtTerrainFace.Create(side.ToString(), gameObject.layer, transform);
face.Terrain = this;
face.Side = side;
face.Depth = 0;
face.CornerBL = cornerBL;
face.CornerBR = cornerBR;
face.CornerTL = cornerTL;
face.CornerTR = cornerTR;
face.CoordBL = new SgtVector2D(0.0, 0.0);
face.CoordBR = new SgtVector2D(1.0, 0.0);
face.CoordTL = new SgtVector2D(0.0, 1.0);
face.CoordTR = new SgtVector2D(1.0, 1.0);
return(face);
}
private void CalculateHeight(SgtVector3D localPosition, ref double height)
{
localPosition /= localPosition.magnitude;
localPosition *= Frequency;
var contribution = 0.0;
var weight = 1.0;
for (var i = 0; i < Octaves; i++)
{
localPosition *= 2.0;
contribution += generators[i].Generate((float)localPosition.x, (float)localPosition.y, (float)localPosition.z) * weight;
weight *= 0.5;
}
// Scale maximum constribution to -1..1
contribution *= scale;
// Scale and add
height += contribution * Amplitude;
}
public static bool Overlap(SgtVector3D a, SgtVector3D b, SgtVector3D c, SgtVector3D d, double eps = 0.001)
{
var total = 0;
if (Overlap(a, b, c) == true)
{
total += 1;
}
if (Overlap(a, b, d) == true)
{
total += 1;
}
if (Overlap(c, d, a) == true)
{
total += 1;
}
if (Overlap(c, d, b) == true)
{
total += 1;
}
return(total >= 2);
}
public void Add(SgtVector3D xyz)
{
if (set == false)
{
set = true;
minX = maxX = xyz.x;
minY = maxY = xyz.y;
minZ = maxZ = xyz.z;
}
else
{
if (xyz.x < minX)
{
minX = xyz.x;
}
else if (xyz.x > maxX)
{
maxX = xyz.x;
}
if (xyz.y < minY)
{
minY = xyz.y;
}
else if (xyz.y > maxY)
{
maxY = xyz.y;
}
if (xyz.z < minZ)
{
minZ = xyz.z;
}
else if (xyz.z > maxZ)
{
maxZ = xyz.z;
}
}
}
public SgtVector3D GetLocalPoint(SgtVector3D localCube)
{
return(localCube.normalized * GetLocalHeight(localCube));
}
public static SgtVector3D Cross(SgtVector3D a, SgtVector3D b)
{
return(new SgtVector3D(a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x));
}
public static double Dot(SgtVector3D a, SgtVector3D b)
{
return(a.x * b.x + a.y * b.y + a.z * b.z);
}
public Vector3 GetLocalNormal(SgtVector3D point)
{
return(SampleLocalOutput(point).Normal.normalized);
}
public bool Contains(SgtVector3D xyz)
{
return(xyz.x >= minX && xyz.x < maxX && xyz.y >= minY && xyz.y < maxY && xyz.z >= minZ && xyz.z < maxZ);
}
// Gets the surface height under the input point in local space
public double GetLocalHeight(SgtVector3D localPoint)
{
return(SampleLocalOutput(localPoint).Vertex.magnitude);
}
public Vector3 GetWorldNormal(SgtVector3D point)
{
return(transform.TransformDirection(GetLocalNormal(point)));
}
public void BuildData()
{
var verts = (2 << Terrain.Subdivisions) + 1;
var step = 1.0 / (verts - 1);
var cornerU = (CornerBR - CornerBL) * step;
var cornerV = (CornerTL - CornerBL) * step;
var cornerS = SgtVector3D.Cross(cornerU, cornerV).normalized *cornerU.magnitude;
var coordU = (CoordBR - CoordBL) * step;
var coordV = (CoordTL - CoordBL) * step;
ValidateVertices();
Bounds.Clear();
for (var y = 0; y < verts; y++)
{
var cubeY = CornerBL + cornerV * y;
for (var x = 0; x < verts; x++)
{
var cube = cubeY + cornerU * x;
var normal = cube.normalized;
var height = Terrain.GetLocalHeight(normal);
var position = normal * height;
Bounds.Add(position);
//if (WriteVertex(x, y) == true)
{
var index = x + y * verts;
var coord1 = CoordBL + coordU * x + coordV * y;
var coord2 = new SgtVector2D(x * step, y * step);
var tangent = default(SgtVector3D);
var color = Color.white;
tangent = SgtVector3D.Cross(normal, cornerU).normalized;
if (Terrain.OnCalculateColor != null)
{
Terrain.OnCalculateColor(position, height, ref color);
}
positions[index] = position;
vertices[index] = (Vector3)position;
coords1[index] = (Vector2)coord1;
coords2[index] = (Vector2)coord2;
colors[index] = color;
}
}
}
if (Terrain.Normals == SgtTerrain.NormalsType.Normalized)
{
for (var y = 0; y < verts; y++)
{
var cubeY = CornerBL + cornerV * y;
for (var x = 0; x < verts; x++)
{
var index = x + y * verts;
var cubeA = cubeY + cornerU * x;
var cubeB = GetPosition(cubeA, cornerU, cornerS);
var normal = cubeA.normalized;
var tangent = (Vector3)(cubeB.normalized - normal).normalized;
normals1[index] = (Vector3)normal;
tangents1[index] = new Vector4(tangent.x, tangent.y, tangent.z, -1.0f);
}
}
}
if (Terrain.Normals == SgtTerrain.NormalsType.Hierarchical)
{
for (var y = 0; y < verts; y++)
{
var cubeY = CornerBL + cornerV * y;
for (var x = 0; x < verts; x++)
{
var index = x + y * verts;
var cube = cubeY + cornerU * x;
// Get position from vertex or recalc off edge
var positionL = x == 0 ? GetPosition(cube, -cornerU, cornerS) : positions[index - 1];
var positionR = x == verts - 1 ? GetPosition(cube, cornerU, cornerS) : positions[index + 1];
var positionB = y == 0 ? GetPosition(cube, -cornerV, cornerS) : positions[index - verts];
var positionT = y == verts - 1 ? GetPosition(cube, cornerV, cornerS) : positions[index + verts];
// Calc normal and tangent
var positionH = positionR - positionL;
var positionV = positionT - positionB;
var normal = SgtVector3D.Cross(positionV, positionH).normalized;
var tangent = (Vector3)positionH.normalized;
normals1[index] = normals2[index] = (Vector3)normal;
tangents1[index] = tangents2[index] = new Vector4(tangent.x, tangent.y, tangent.z, -1.0f);
}
}
}
if (Terrain.OnPostProcessVertices != null)
{
Terrain.OnPostProcessVertices(this);
}
if (Split == true)
{
CopyVertiesToChildren();
}
}
