void Start () {
// Cache camera
mainCamera = Camera.main;
// Parent the particle system to the main camera
particles.particleSystemTransform.parent = mainCamera.transform;
particles.shurikenParticleSystem.simulationSpace = ParticleSystemSimulationSpace.Local;
// Create a new spline and set it up
spline = new GameObject("Viewport Spline", typeof(PlaygroundSpline)).GetComponent<PlaygroundSpline>();
spline.Loop = true;
spline.Reset ();
spline.SetControlPointMode(0, BezierControlPointMode.Free);
spline.SetControlPointMode(1, BezierControlPointMode.Free);
// Add three additional nodes (a basic spline will contain two initial nodes)
spline.AddNode();
spline.AddNode();
spline.AddNode();
// Set the nodes to match the viewport
currentScreenX = Screen.width;
currentScreenY = Screen.height;
SetViewportNodes();
// Assign the spline to the particle system
particles.splines.Add (spline);
// Make sure we're using the spline as source
particles.source = SOURCEC.Spline;
prevScreenOffset = screenOffset;
}
void OnEnable () {
spline = target as PlaygroundSpline;
playgroundSettings = PlaygroundSettingsC.GetReference();
playgroundLanguage = PlaygroundSettingsC.GetLanguage();
lastActiveTool = UnityEditor.Tools.current;
UpdateUserList();
}
void OnEnable ()
{
if (noiseDistributionL == null || noiseDistributionL.keys.Length==0)
SetAnimationCurveVals(ref noiseDistributionL);
if (noiseDistributionR == null || noiseDistributionR.keys.Length==0)
SetAnimationCurveVals(ref noiseDistributionR);
if (GetComponent<Renderer>() == null)
gameObject.AddComponent<MeshRenderer>();
if (spline == null)
spline = GetComponent<PlaygroundSpline>();
if (spline != null)
BuildSplineMesh(spline, points, width);
SetVals();
}
void OnEnable()
{
if (noiseDistributionL == null || noiseDistributionL.keys.Length == 0)
{
SetAnimationCurveVals(ref noiseDistributionL);
}
if (noiseDistributionR == null || noiseDistributionR.keys.Length == 0)
{
SetAnimationCurveVals(ref noiseDistributionR);
}
if (GetComponent <Renderer>() == null)
{
gameObject.AddComponent <MeshRenderer>();
}
if (spline == null)
{
spline = GetComponent <PlaygroundSpline>();
}
if (spline != null)
{
BuildSplineMesh(spline, points, width);
}
SetVals();
}
public void BuildSplineMesh (PlaygroundSpline spline, int points, float width)
{
if (points<2)
points = 2;
int totalVertices = points*2;
MeshFilter _mf = GetComponent<MeshFilter>()!=null? GetComponent<MeshFilter>() : gameObject.AddComponent<MeshFilter>();
Mesh _m = new Mesh();
Vector3[] verts = new Vector3[totalVertices];
Vector2[] uvs = new Vector2[totalVertices];
int[] tris = new int[(points-1)*6];
Vector3 up = meshUpDirection;
// Construct the mesh
for (int i = 0; i<points; i++)
{
// Create a normalized time value
float t = (i*1f)/(points-1);
float tNext = ((i*1f)+1)/(points-1);
if (t>=1 && !spline.Loop)
t = .9999f;
if (tNext>=1 && !spline.Loop)
tNext = .99999f;
// Get the current and next position from the spline on time
Vector3 currentPosition = spline.GetPoint (t);
Vector3 nextPosition = spline.GetPoint (tNext);
// Raycast down to determine surface (especially practical for roads / rivers)
if (followSurface || followSurfaceRotation)
{
RaycastHit hit;
if (Physics.Raycast (currentPosition, surfaceDirection, out hit))
{
if (followSurfaceRotation)
up = hit.normal;
if (followSurface)
currentPosition = hit.point + (hit.normal * surfaceOffset);
}
if (followSurface)
{
if (Physics.Raycast (nextPosition, surfaceDirection, out hit))
{
nextPosition = hit.point + (hit.normal * surfaceOffset);
}
}
}
// Calculate noise (if enabled)
float noiseAmountL = noise? Mathf.PerlinNoise((t%1f)*noiseScale.x, 0)*noiseStrength : 0;
float noiseAmountR = noise? Mathf.PerlinNoise((t%1f)*noiseScale.y, 0)*noiseStrength : 0;
if (noise && noiseDistribution)
{
noiseAmountL *= noiseDistributionL.Evaluate(t);
noiseAmountR *= noiseDistributionR.Evaluate(t);
}
// Create two width point references based on current and next position
Vector3 dir = (Vector3.Cross(up, nextPosition - currentPosition)).normalized;
Vector3 lPoint = currentPosition + dir * ((width/2)+noiseAmountL);
Vector3 rPoint = currentPosition - dir * ((width/2)+noiseAmountR);
// Draw debug
Debug.DrawLine(lPoint, rPoint);
verts[i*2] = lPoint;
verts[(i*2)+1] = rPoint;
uvs[i*2] = new Vector2(t,0);
uvs[(i*2)+1] = new Vector2(t,1f);
if (i>0)
{
int triIndex = (i-1)*6;
int vertIndex = i*2;
tris[triIndex] = vertIndex-2;
tris[triIndex+1] = vertIndex-1;
tris[triIndex+2] = vertIndex;
tris[triIndex+3] = vertIndex;
tris[triIndex+4] = vertIndex-1;
tris[triIndex+5] = vertIndex+1;
}
}
// Assign the data to the mesh
_m.vertices = verts;
_m.uv = uvs;
_m.triangles = tris;
_m.RecalculateNormals();
// Assign the mesh to the MeshFilter
_mf.mesh = _m;
}
public void BuildSplineMesh(PlaygroundSpline spline, int points, float width)
{
if (points < 2)
{
points = 2;
}
int totalVertices = points * 2;
MeshFilter _mf = GetComponent <MeshFilter>() != null?GetComponent <MeshFilter>() : gameObject.AddComponent <MeshFilter>();
Mesh _m = new Mesh();
Vector3[] verts = new Vector3[totalVertices];
Vector2[] uvs = new Vector2[totalVertices];
int[] tris = new int[(points - 1) * 6];
Vector3 up = meshUpDirection;
// Construct the mesh
for (int i = 0; i < points; i++)
{
// Create a normalized time value
float t = (i * 1f) / (points - 1);
float tNext = ((i * 1f) + 1) / (points - 1);
if (t >= 1 && !spline.Loop)
{
t = .9999f;
}
if (tNext >= 1 && !spline.Loop)
{
tNext = .99999f;
}
// Get the current and next position from the spline on time
Vector3 currentPosition = spline.GetPoint(t);
Vector3 nextPosition = spline.GetPoint(tNext);
// Raycast down to determine surface (especially practical for roads / rivers)
if (followSurface || followSurfaceRotation)
{
RaycastHit hit;
if (Physics.Raycast(currentPosition, surfaceDirection, out hit))
{
if (followSurfaceRotation)
{
up = hit.normal;
}
if (followSurface)
{
currentPosition = hit.point + (hit.normal * surfaceOffset);
}
}
if (followSurface)
{
if (Physics.Raycast(nextPosition, surfaceDirection, out hit))
{
nextPosition = hit.point + (hit.normal * surfaceOffset);
}
}
}
// Calculate noise (if enabled)
float noiseAmountL = noise? Mathf.PerlinNoise((t % 1f) * noiseScale.x, 0) * noiseStrength : 0;
float noiseAmountR = noise? Mathf.PerlinNoise((t % 1f) * noiseScale.y, 0) * noiseStrength : 0;
if (noise && noiseDistribution)
{
noiseAmountL *= noiseDistributionL.Evaluate(t);
noiseAmountR *= noiseDistributionR.Evaluate(t);
}
// Create two width point references based on current and next position
Vector3 dir = (Vector3.Cross(up, nextPosition - currentPosition)).normalized;
Vector3 lPoint = currentPosition + dir * ((width / 2) + noiseAmountL);
Vector3 rPoint = currentPosition - dir * ((width / 2) + noiseAmountR);
// Draw debug
Debug.DrawLine(lPoint, rPoint);
verts[i * 2] = lPoint;
verts[(i * 2) + 1] = rPoint;
uvs[i * 2] = new Vector2(t, 0);
uvs[(i * 2) + 1] = new Vector2(t, 1f);
if (i > 0)
{
int triIndex = (i - 1) * 6;
int vertIndex = i * 2;
tris[triIndex] = vertIndex - 2;
tris[triIndex + 1] = vertIndex - 1;
tris[triIndex + 2] = vertIndex;
tris[triIndex + 3] = vertIndex;
tris[triIndex + 4] = vertIndex - 1;
tris[triIndex + 5] = vertIndex + 1;
}
}
// Assign the data to the mesh
_m.vertices = verts;
_m.uv = uvs;
_m.triangles = tris;
_m.RecalculateNormals();
// Assign the mesh to the MeshFilter
_mf.mesh = _m;
}
