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#define LightCone_OnDrawGizmos_Collide
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[RequireComponent( typeof(Light) )]
public class LightCone : MonoBehaviour {
public int wedges = 36;
public float dist = 20;
public float width = 2;
public float height = 2;
[SerializeField]
private Color _color = new Color(1, 1, 1, 0.25f);
public LayerMask collidesWith;
public int gizmoWedges = 4;
[Header("Spotlight Settings")]
public bool spotlightEnabled = true;
public float spotAnglePercent = 100;
public float rangePercent = 100;
MeshFilter mF;
Mesh m;
Vector3[] verts;
int[] tris;
Material mat;
RaycastHit[] hits;
private Light lt;
private float dist0, width0, sAP0, rP0;
public Color color
{
get
{
return _color;
}
set
{
_color = value;
UpdateLight();
}
}
// Use this for initialization
void Start () {
mF = GetComponent<MeshFilter>();
m = mF.mesh;
m.Clear();
MakeVerts();
tris = new int[wedges*3];
int triN=0;
int vertN=1;
for (int i=0; i<wedges; i++) {
tris[triN] = 0;
triN++;
if (vertN < verts.Length-1) {
tris[triN] = vertN+1;
} else {
tris[triN] = 1;
}
triN++;
tris[triN] = vertN;
vertN++;
triN++;
}
m.triangles = tris;
mat = GetComponent<Renderer>().material;
UpdateLight();
}
void MakeVerts() {
verts = new Vector3[wedges+1];
verts[0] = Vector3.zero;
Vector3 v, r;
hits = new RaycastHit[wedges];
for (int i=0; i<wedges; i++) {
v = Vector3.zero;
v.z = dist;
v.x = Mathf.Cos(i * Mathf.PI * 2 / wedges) * width;
v.y = Mathf.Sin(i * Mathf.PI * 2 / wedges) * height;
r = transform.rotation * v.normalized;
if ( Physics.Raycast(transform.position, r, out hits[i], v.magnitude, collidesWith) ) {
v = v.normalized * hits[i].distance;
}
verts[i+1] = v;
}
m.vertices = verts;
}
// Update is called once per frame
void Update () {
MakeVerts();
if (color != mat.color) {
mat.color = color;
}
}
// This draws the outline when not playing (and Selected)
void OnDrawGizmosSelected() {
if (Application.isPlaying) return;
Vector3[] pts = new Vector3[gizmoWedges];
Vector3 v, vDir;
Color litColor = color;
litColor.a = 1;
#if LightCone_OnDrawGizmos_Collide
Color grayColor = Color.Lerp(Color.clear, color, 0.5f);
grayColor.a = 0.5f;
#else
Gizmos.color = litColor;
#endif
for (int i=0; i<gizmoWedges; i++) {
v = Vector3.zero;
v.z = dist;
v.x = Mathf.Cos(i * Mathf.PI * 2 / gizmoWedges) * width;
v.y = Mathf.Sin(i * Mathf.PI * 2 / gizmoWedges) * height;
vDir = transform.rotation * v;
pts[i] = vDir;
pts[i] += transform.position;
#if LightCone_OnDrawGizmos_Collide
#else
Gizmos.DrawLine(transform.position, pts[i]);
if (i>0) {
Gizmos.DrawLine(pts[i-1], pts[i]);
if (i == gizmoWedges-1) {
Gizmos.DrawLine(pts[i], pts[0]);
}
}
#endif
}
#if LightCone_OnDrawGizmos_Collide
Vector3[] ptsColl = new Vector3[gizmoWedges];
RaycastHit hitInfo;
for (int i = 0; i < pts.Length; i++) {
ptsColl[i] = pts[i];
vDir = ptsColl[i] - transform.position;
if (Physics.Raycast(transform.position, vDir, out hitInfo, vDir.magnitude, collidesWith))
{
// The line collided with something, so make it shorter
ptsColl[i] = hitInfo.point;
}
// Draw the area past the collision
Gizmos.color = grayColor;
Gizmos.DrawLine(ptsColl[i], pts[i]);
if (i > 0)
{
Gizmos.DrawLine(pts[i - 1], pts[i]);
if (i == gizmoWedges - 1)
{
Gizmos.DrawLine(pts[i], pts[0]);
}
}
// Draw the collision
Gizmos.color = litColor;
Gizmos.DrawLine(transform.position, ptsColl[i]);
if (i > 0)
{
Gizmos.DrawLine(ptsColl[i - 1], ptsColl[i]);
if (i == gizmoWedges - 1)
{
Gizmos.DrawLine(ptsColl[i], ptsColl[0]);
}
}
}
#endif
}
private void OnDrawGizmos()
{
if (Application.isPlaying) return;
UpdateLight();
}
void UpdateLight() {
if (lt == null) {
lt = GetComponent<Light>();
lt.type = LightType.Spot;
}
if (dist0 != dist || width0 != width || sAP0 != spotAnglePercent || rangePercent != rP0) {
lt.spotAngle = Mathf.Atan2(width, dist)*360/Mathf.PI * (spotAnglePercent / 100f);
lt.range = dist * rangePercent / 100f;
dist0 = dist;
width0 = width;
sAP0 = spotAnglePercent;
rP0 = rangePercent;
}
lt.color = color;
lt.enabled = spotlightEnabled;
}
public RaycastHit[] GetRaycastHits() {
return hits;
}
}
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