Commit 31f9a3f

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implement intersect function between a line and a plane

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+75

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Lines changed: 43 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,43 @@`
	`1`	`+using System.Collections;`
	`2`	`+using System.Collections.Generic;`
	`3`	`+using UnityEngine;`
	`4`	`+`
	`5`	`+public class CreatePlaneHit : MonoBehaviour`
	`6`	`+{`
	`7`	`+ public Transform A;`
	`8`	`+ public Transform B;`
	`9`	`+ public Transform C;`
	`10`	`+ public Transform D;`
	`11`	`+ public Transform E;`
	`12`	`+`
	`13`	`+ Plane plane;`
	`14`	`+ Line L1;`
	`15`	`+`
	`16`	`+ void Start()`
	`17`	`+ {`
	`18`	`+ plane = new Plane(new Coords(A.position), new Coords(B.position), new Coords(C.position));`
	`19`	`+`
	`20`	`+ L1 = new Line(new Coords(D.position), new Coords(E.position), Line.LINETYPE.RAY);`
	`21`	`+ L1.Draw(1, Color.green);`
	`22`	`+`
	`23`	`+ for (float s = 0; s <= 1; s += 0.1f)`
	`24`	`+ {`
	`25`	`+ for (float t = 0; t <= 1; t += 0.1f)`
	`26`	`+ {`
	`27`	`+ GameObject sphere = GameObject.CreatePrimitive(PrimitiveType.Sphere);`
	`28`	`+ sphere.transform.position = plane.Lerp(s, t).ToVector();`
	`29`	`+ }`
	`30`	`+ }`
	`31`	`+`
	`32`	`+ float z = L1.IntersectsAt(plane);`
	`33`	`+ Debug.Log(z);`
	`34`	`+`
	`35`	`+ GameObject cube = GameObject.CreatePrimitive(PrimitiveType.Cube);`
	`36`	`+ cube.transform.position = L1.Lerp(z).ToVector();`
	`37`	`+ }`
	`38`	`+`
	`39`	`+ void Update()`
	`40`	`+ {`
	`41`	`+`
	`42`	`+ }`
	`43`	`+}`

Lines changed: 11 additions & 0 deletions

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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -53,8 +53,8 @@ static public float Angle(Coords vector1, Coords vector2)`
`53`	`53`	`{`
`54`	`54`	`float dotDivide = Dot(vector1, vector2) / (Distance(new Coords(0, 0, 0), vector1) * Distance(new Coords(0, 0, 0), vector2));`
`55`	`55`	`return Mathf.Acos(dotDivide); //radians. For degrees * 180/Mathf.PI;`
`56`		`- }`
`57`	`56`
	`57`	`+ }`
`58`	`58`	`static public Coords Cross(Coords vector1, Coords vector2)`
`59`	`59`	`{`
`60`	`60`	`float iMult = vector1.y * vector2.z - vector1.z * vector2.y;`

Lines changed: 15 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,6 @@`
`1`	`1`	`using System.Collections;`
`2`	`2`	`using System.Collections.Generic;`
	`3`	`+using System.Text;`
`3`	`4`	`using UnityEngine;`
`4`	`5`
`5`	`6`	`public class Line`
`@@ -31,18 +32,30 @@ public Line(Coords _A, Coords _V)`
`31`	`32`	`type = LINETYPE.SEGMENT;`
`32`	`33`	`}`
`33`	`34`
	`35`	`+ public float IntersectsAt(Plane p)`
	`36`	`+ {`
	`37`	`+ Coords n = HolisticMath.Cross(p.v, p.u);`
	`38`	`+ if(HolisticMath.Dot(n, v) == 0)`
	`39`	`+ {`
	`40`	`+ return float.NaN;`
	`41`	`+ }`
	`42`	`+`
	`43`	`+ float t = HolisticMath.Dot(new Coords(-n.x, -n.y, -n.z), A - p.A) / HolisticMath.Dot(n, B - A);`
	`44`	`+`
	`45`	`+ return t;`
	`46`	`+ }`
`34`	`47`
`35`	`48`	`public float IntersectsAt(Line l)`
`36`	`49`	`{`
`37`		`- if(HolisticMath.Dot(Coords.Perp(l.v), v) == 0)`
	`50`	`+ if(HolisticMath.Dot(Coords.Perp(l.v), v) == 0)`
`38`	`51`	`{`
`39`	`52`	`return float.NaN;`
`40`	`53`	`}`
`41`	`54`
`42`	`55`	`Coords c = l.A - this.A;`
`43`	`56`	`float t = HolisticMath.Dot(Coords.Perp(l.v), c) / HolisticMath.Dot(Coords.Perp(l.v), v);`
`44`	`57`
`45`		`- if(t < 0 \|\| t > 1 && type == LINETYPE.SEGMENT)`
	`58`	`+ if(t < 0 \|\| t > 1 && type == LINETYPE.SEGMENT)`
`46`	`59`	`{`
`47`	`60`	`return float.NaN;`
`48`	`61`	`}`

Lines changed: 5 additions & 5 deletions

Original file line number	Diff line number	Diff line change
`@@ -4,11 +4,11 @@`
`4`	`4`
`5`	`5`	`public class Plane`
`6`	`6`	`{`
`7`		`- Coords A;`
`8`		`- Coords B;`
`9`		`- Coords C;`
`10`		`- Coords v;`
`11`		`- Coords u;`
	`7`	`+ publicCoords A;`
	`8`	`+ publicCoords B;`
	`9`	`+ publicCoords C;`
	`10`	`+ publicCoords v;`
	`11`	`+ publicCoords u;`
`12`	`12`
`13`	`13`	`public Plane(Coords _A, Coords _B, Coords _C)`
`14`	`14`	`{`

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