public static bool ComputeCameraMinorMajorAngle(Camera cam, ComputeCameraMinorMajorAngleOptions options, out SectionAngle angles)
{
const float raycastDistance = 512f;
if (!cam)
{
angles = SectionAngle.Null;
return(false);
}
Transform camTransform = cam.transform;
Vector3 camPosition = camTransform.position;
Vector3[] frustumCorners = new Vector3[4];
cam.CalculateFrustumCorners(new Rect(0, 0, 1, 1), cam.farClipPlane, Camera.MonoOrStereoscopicEye.Mono, frustumCorners);
Vector3[] frustumCornersHit = new Vector3[4];
float[] minorAngles = new float[4];
float[] majorAngles = new float[4];
RaycastHit hit;
for (int i = 0; i < frustumCorners.Length; ++i)
{
var worldSpaceCorner = camTransform.TransformPoint(frustumCorners[i]);
Ray ray = new Ray(camPosition, (worldSpaceCorner - camPosition).normalized);
if (!Physics.Raycast(ray, out hit, raycastDistance, options.landLayerMask))
{
GameMain.ErrorTracking.Add("Fail to raycast mountain. See red ray from camera.");
Debug.DrawLine(ray.origin, ray.origin + ray.direction * raycastDistance, Color.red);
angles = SectionAngle.Null;
return(false);
}
frustumCornersHit[i] = hit.point;
Debug.DrawLine(camPosition, frustumCornersHit[i], Color.magenta);
Torus.GetAngle(frustumCornersHit[i], out majorAngles[i], out minorAngles[i]);
}
var frustumCornersCenterHit = (frustumCornersHit[0] + frustumCornersHit[1] + frustumCornersHit[2] + frustumCornersHit[3]) * .25f;
Debug.DrawLine(camPosition, frustumCornersCenterHit, Color.cyan);
angles = SectionAngle.Null;
return(false);
// 0 => bottom-left
// 1 => top-left
// 2 => top-right
// 3 => bottom-right
float majorStart;
float majorEnd;
float minorStart;
float minorEnd;
Tools.GetStartEndAngle(majorAngles[1], majorAngles[2], out majorStart, out majorEnd);
Tools.GetStartEndAngle(minorAngles[0], minorAngles[1], out minorStart, out minorEnd);
Debug.Log($"minorStart:{minorStart} minorEnd:{minorEnd} majorStart:{majorStart} majorEnd:{majorEnd}");
majorStart -= options.majorPadding;
majorEnd += options.majorPadding;
minorStart -= options.minorPadding;
minorEnd += options.minorPadding;
angles.majorStart = Tools.Snap(majorStart, options.majorIncrement) % 360f;
angles.majorEnd = Tools.Snap(majorEnd, options.majorIncrement) % 360f;
angles.minorStart = Tools.Snap(minorStart, options.minorIncrement) % 360f;
angles.minorEnd = Tools.Snap(minorEnd, options.minorIncrement) % 360f;
angles.minorLength = (angles.minorEnd - angles.minorStart) % 360f;
angles.majorLength = (angles.majorEnd - angles.majorStart) % 360f;
return(true);
}