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Commit step for Cubic Bezier path decoder (under development and disabled for now)

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This commit is contained in:
Demigiant 2018-12-16 12:56:57 +01:00
parent f30937b6b6
commit 9beae472ee
3 changed files with 145 additions and 1 deletions
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1
_DOTween.Assembly/DOTween/DOTween.csproj
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@ -106,6 +106,7 @@
<Compile Include="PathType.cs" />
<Compile Include="Plugins\Color2Plugin.cs" />
<Compile Include="Plugins\ColorWrapperPlugin.cs" />
<Compile Include="Plugins\Core\PathCore\CubicBezierDecoder.cs" />
<Compile Include="Plugins\Core\PathCore\ControlPoint.cs" />
<Compile Include="Plugins\DoublePlugin.cs" />
<Compile Include="Plugins\LongPlugin.cs" />

4
_DOTween.Assembly/DOTween/PathType.cs
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@ -14,6 +14,8 @@ namespace DG.Tweening
/// <summary>Linear, composed of straight segments between each waypoint</summary>
Linear,
/// <summary>Curved path (which uses Catmull-Rom curves)</summary>
CatmullRom
CatmullRom,
// /// <summary>Curved path (which uses Cubic Bezier curves, where each point requires two extra control points)</summary>
// CubicBezier // Under development
}
}

141
_DOTween.Assembly/DOTween/Plugins/Core/PathCore/CubicBezierDecoder.cs Normal file
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@ -0,0 +1,141 @@
// Author: Daniele Giardini - http://www.demigiant.com
// Created: 2018/11/30 11:58
// License Copyright (c) Daniele Giardini
// This work is subject to the terms at http://dotween.demigiant.com/license.php
using System;
using UnityEngine;
namespace DG.Tweening.Plugins.Core.PathCore
{
internal class CubicBezierDecoder : ABSPathDecoder
{
// wps must be in multiple of 3 (each waypoint has 2 control points), in this order:
// - waypoint
// - IN control point
// - OUT control point
internal override void FinalizePath(Path p, Vector3[] wps, bool isClosedPath)
{
int wpsLen = wps.Length;
if (wpsLen < 6 || wpsLen % 3 != 0) {
Debug.LogError("CubicBezier paths must contain waypoints in multiple of 3 (1: waypoint, 2: IN control point, 3: OUT control point)");
return;
}
int wpsOnlyLen = wpsLen / 3;
// Store control points
p.controlPoints = new ControlPoint[wpsOnlyLen];
int cpIndex = 0;
for (int i = 0; i < wpsLen; i+=3) {
p.controlPoints[cpIndex] = new ControlPoint(wps[i+1], wps[i+2]);
cpIndex++;
}
// Manage closed path
if (isClosedPath) {
// TODO Bezier Closed Path
}
// Store total subdivisions
p.subdivisions = wpsOnlyLen * p.subdivisionsXSegment;
// Store time to len tables
SetTimeToLengthTables(p, p.subdivisions);
// Store waypoints lengths
SetWaypointsLengths(p, p.subdivisionsXSegment);
// // Add starting and ending control points (uses only one vector per control point)
// wpsLen = wps.Length;
// if (p.controlPoints == null || p.controlPoints.Length != 2) p.controlPoints = new ControlPoint[2];
// if (isClosedPath) {
// p.controlPoints[0] = new ControlPoint(wps[wpsLen - 2], Vector3.zero);
// p.controlPoints[1] = new ControlPoint(wps[1], Vector3.zero);
// } else {
// p.controlPoints[0] = new ControlPoint(wps[1], Vector3.zero);
// Vector3 lastP = wps[wpsLen - 1];
// Vector3 diffV = lastP - wps[wpsLen - 2];
// p.controlPoints[1] = new ControlPoint(lastP + diffV, Vector3.zero);
// }
// // Store total subdivisions
// p.subdivisions = wpsLen * p.subdivisionsXSegment;
// // Store time to len tables
// SetTimeToLengthTables(p, p.subdivisions);
// // Store waypoints lengths
// SetWaypointsLengths(p, p.subdivisionsXSegment);
}
// controlPoints as a separate parameter so we can pass custom ones from SetWaypointsLengths
internal override Vector3 GetPoint(float perc, Vector3[] wps, Path p, ControlPoint[] controlPoints)
{
int numSections = wps.Length - 1; // Considering also control points
int tSec = (int)Math.Floor(perc * numSections);
int currPt = numSections - 1;
if (currPt > tSec) currPt = tSec;
float u = perc * numSections - currPt;
Vector3 a = currPt == 0 ? controlPoints[0].a : wps[currPt - 1];
Vector3 b = wps[currPt];
Vector3 c = wps[currPt + 1];
Vector3 d = currPt + 2 > wps.Length - 1 ? controlPoints[1].a : wps[currPt + 2];
return .5f * (
(-a + 3f * b - 3f * c + d) * (u * u * u)
+ (2f * a - 5f * b + 4f * c - d) * (u * u)
+ (-a + c) * u
+ 2f * b
);
}
internal void SetTimeToLengthTables(Path p, int subdivisions)
{
float pathLen = 0;
float incr = 1f / subdivisions;
float[] timesTable = new float[subdivisions];
float[] lengthsTable = new float[subdivisions];
Vector3 prevP = GetPoint(0, p.wps, p, p.controlPoints);
for (int i = 1; i < subdivisions + 1; ++i) {
float perc = incr * i;
Vector3 currP = GetPoint(perc, p.wps, p, p.controlPoints);
pathLen += Vector3.Distance(currP, prevP);
prevP = currP;
timesTable[i - 1] = perc;
lengthsTable[i - 1] = pathLen;
}
// Assign
p.length = pathLen;
p.timesTable = timesTable;
p.lengthsTable = lengthsTable;
}
internal void SetWaypointsLengths(Path p, int subdivisions)
{
// Create a relative path between each waypoint,
// with its start and end control lines coinciding with the next/prev waypoints.
int count = p.wps.Length;
float[] wpLengths = new float[count];
wpLengths[0] = 0;
ControlPoint[] partialControlPs = new ControlPoint[2];
Vector3[] partialWps = new Vector3[2];
for (int i = 1; i < count; ++i) {
// Create partial path
partialControlPs[0].a = i == 1 ? p.controlPoints[0].a : p.wps[i - 2];
partialWps[0] = p.wps[i - 1];
partialWps[1] = p.wps[i];
partialControlPs[1].a = i == count - 1 ? p.controlPoints[1].a : p.wps[i + 1];
// Calculate length of partial path
float partialLen = 0;
float incr = 1f / subdivisions;
Vector3 prevP = GetPoint(0, partialWps, p, partialControlPs);
for (int c = 1; c < subdivisions + 1; ++c) {
float perc = incr * c;
Vector3 currP = GetPoint(perc, partialWps, p, partialControlPs);
partialLen += Vector3.Distance(currP, prevP);
prevP = currP;
}
wpLengths[i] = partialLen;
}
// Assign
p.wpLengths = wpLengths;
}
}
}