Vector3 GetPositionAlongPoints(float val, out float w)
{
// Reduce by tiny amount so we can still sample up!
// Also it gives us less of a chance of hitting the points exactly
float v = val * .99f * ((float)numPoints - 1);
float up = Mathf.Ceil(v);
float down = Mathf.Floor(v);
float inVal = v - down;
Vector3 fPos;
if (inVal == 0 || up == down)
{
fPos = points[(int)down].position;
w = points[(int)down].width;
}
else
{
BranchPoint p1 = points[(int)down];
BranchPoint p2 = points[(int)up];
fPos = cubicPoint(inVal, p1.position, p1.position + p1.normal / 3, p2.position - p2.normal / 3, p2.position);
w = Mathf.Lerp(p1.width, p2.width, inVal);
}
return(fPos);
}
public void GetBarkData(float x, float y, out Vector3 pos, out Vector3 centerPos, out Vector3 dir, out Vector3 nor, out Vector3 tang, out float life, out float width)
{
float v = x * .99f * ((float)numPoints - 1);
float angle = y * 2 * Mathf.PI;
float up = Mathf.Ceil(v);
float down = Mathf.Floor(v);
float inVal = v - down;
Vector3 fPos;
Vector3 fPos1;
float fLife;
float fWidth;
if (inVal == 0 || up == down)
{
v += .0001f;
up = Mathf.Ceil(v);
down = Mathf.Floor(v);
inVal = v - down;
}
BranchPoint p1 = points[(int)down];
BranchPoint p2 = points[(int)up];
fPos = cubicPoint(inVal, p1.position, p1.position + p1.normal / 3, p2.position - p2.normal / 3, p2.position);
fPos1 = cubicPoint(inVal + .001f, p1.position, p1.position + p1.normal / 3, p2.position - p2.normal / 3, p2.position);
fLife = Mathf.Lerp(p1.timeCreated, p2.timeCreated, inVal);
fWidth = Mathf.Lerp(p1.width, p2.width, inVal);
Vector3 fNor = Vector3.Lerp(p1.normal, p2.normal, inVal);
Vector3 fTan = Vector3.Lerp(p1.tangent, p2.tangent, inVal);
Vector3 fBi = Vector3.Lerp(p1.binormal, p2.binormal, inVal);
Vector3 outVec = (fTan * Mathf.Sin(angle) - fBi * Mathf.Cos(angle)) * fWidth;
centerPos = fPos;
fPos += outVec; // radius;;
pos = fPos;
dir = (fPos1 - fPos).normalized;
nor = outVec.normalized;
tang = Vector3.Cross(nor, dir).normalized;
life = fLife;
width = fWidth;
}
// Making points along each branch
public void MakePoints()
{
Vector3 currPos = startPosition;
tree.currentTotalPoints += numPoints;
// place the points along the branch
for (int i = 0; i < numPoints; i++)
{
float valInBranch = ((float)i / ((float)numPoints - 1));
float widthMultiplier = 1;
if (iterationLevel == 0)
{
widthMultiplier = tree.trunkCurve.Evaluate(valInBranch);
}
else
{
widthMultiplier = tree.branchCurve.Evaluate(valInBranch);
}
if (i != 0)
{
float currNoiseSize = currVal(tree.noiseSize, tree.noiseSizeReducer);
float currNoisePower = currVal(tree.noisePower, tree.noisePowerReducer);
float currUp = currVal(tree.upDesire, tree.upDesireReducer);
if (i != 1)
{
Vector3 dir = points[i - 1].position - points[i - 2].position;
currPos += dir.normalized * length * ((float)1 / ((float)numPoints - 1));
}
else
{
currPos += length * direction * ((float)1 / ((float)numPoints - 1));
}
currPos += currUp * Vector3.up * .003f;
Vector3 noiseDir = Perlin.CurlNoise(currPos * currNoiseSize + tree.noiseOffset);
currPos += noiseDir * currNoisePower * .04f;
}
float fWidth = baseWidth * widthMultiplier;
BranchPoint p = new BranchPoint(currPos, valInBranch, timeCreated + valInBranch, fWidth);
points.Add(p);
// TODO ADD NOISE
}
// Gets Tangents for each of the points for sake of
// cubic beziers
for (int i = 0; i < numPoints; i++)
{
BranchPoint p = points[i];
if (i == 0)
{
p.normal = (points[1].position - p.position);
}
else if (i == points.Count - 1)
{
p.normal = (p.position - points[points.Count - 2].position);
}
else
{
p.normal = -(points[i - 1].position - points[i + 1].position);
}
if (i == 0)
{
p.tangent = (Vector3.Cross(p.normal.normalized, Vector3.left)).normalized;
p.binormal = (Vector3.Cross(p.normal, p.tangent)).normalized;
}
else
{
p.tangent = -(Vector3.Cross(p.normal.normalized, points[i - 1].binormal)).normalized;
p.binormal = (Vector3.Cross(p.normal, p.tangent)).normalized;
}
points[i] = p;
}
}
