private Vector2 GetClosestMouseHit()
{
foreach (Camera camera in m_Cameras)
{
Ray ray = camera.ScreenPointToRay(Input.mousePosition);
VRRaycastHit hit = RaycastMesh(ray.origin, ray.direction);
if (hit != null)
{
return(hit.textureCoord);
}
}
return(new Vector2(-1, -1));
}
public VRRaycastHit RaycastMesh(Vector3 rayOrigin, Vector3 rayDirection)
{
for (int i = 0; i < m_RaycastMeshTriangles.Length; i += 3)
{
int i0 = m_RaycastMeshTriangles[i];
int i1 = m_RaycastMeshTriangles[i + 1];
int i2 = m_RaycastMeshTriangles[i + 2];
VRRaycastHit raycastHit = _RaycastTriangle(i0, i1, i2, rayOrigin, rayDirection);
if (raycastHit != null)
{
return(raycastHit);
}
}
return(null);
}
private VRRaycastHit _RaycastTriangle(int i0, int i1, int i2, Vector3 rayOrigin, Vector3 rayDirection)
{
Vector3 p0 = transform.TransformPoint(m_RaycastMeshVertices[i0]);
Vector3 p1 = transform.TransformPoint(m_RaycastMeshVertices[i1]);
Vector3 p2 = transform.TransformPoint(m_RaycastMeshVertices[i2]);
// Möller–Trumbore intersection algorithm
// http://en.wikipedia.org/wiki/M%C3%B6ller%E2%80%93Trumbore_intersection_algorithm
// edge 1
Vector3 E1 = p1 - p0;
// edge 2
Vector3 E2 = p2 - p0;
// edge 3 - only for testing degenerate triangles
Vector3 E3 = p2 - p0;
if (E1.sqrMagnitude < 0.00001f || E2.sqrMagnitude < 0.00001f || E3.sqrMagnitude < 0.00001f)
{
// Skip degenerate triangle
return(null);
}
//Begin calculating determinant - also used to calculate u parameter
Vector3 P = Vector3.Cross(rayDirection, E2);
float det = Vector3.Dot(E1, P);
if (det > -0.00001f && det < 0.00001f)
{
//if determinant is near zero, ray lies in plane of triangle
return(null);
}
float inv_det = 1.0f / det;
//Calculate distance from V1 to ray origin
Vector3 T = rayOrigin - p0;
//Calculate u parameter and test bound
float u = Vector3.Dot(T, P) * inv_det;
if (u < 0.0f || u > 1.0f)
{
//The intersection lies outside of the triangle
return(null);
}
//Prepare to test v parameter
Vector3 Q = Vector3.Cross(T, E1);
//Calculate V parameter and test bound
float v = Vector3.Dot(rayDirection, Q) * inv_det;
if (v < 0.0f || u + v > 1.0f)
{
//The intersection lies outside of the triangle
return(null);
}
float t = Vector3.Dot(E2, Q) * inv_det;
if (t <= 0.00001f)
{
// Intersection is before origin
return(null);
}
// We have an intersection, now compute uv
Vector3 hitPoint = rayOrigin + (rayDirection * t);
Vector3 w = hitPoint - p0;
Vector3 vCrossW = Vector3.Cross(E2, w);
Vector3 vCrossU = Vector3.Cross(E2, E1);
if (Vector3.Dot(vCrossW, vCrossU) < 0.0f)
{
return(null);
}
Vector3 uCrossW = Vector3.Cross(E1, w);
Vector3 uCrossV = Vector3.Cross(E1, E2);
if (Vector3.Dot(uCrossW, uCrossV) < 0.0f)
{
return(null);
}
float denom = uCrossV.magnitude;
float b1 = vCrossW.magnitude / denom;
float b2 = uCrossW.magnitude / denom;
if ((b1 <= 1.0f) && (b2 <= 1.0f) && (b1 + b2 <= 1.0f))
{
float b0 = 1.0f - b1 - b2;
Vector2 uv0 = m_RaycastMeshUV[i0];
Vector2 uv1 = m_RaycastMeshUV[i1];
Vector2 uv2 = m_RaycastMeshUV[i2];
Vector2 uv = new Vector2(b0 * uv0.x + b1 * uv1.x + b2 * uv2.x, b0 * uv0.y + b1 * uv1.y + b2 * uv2.y);
VRRaycastHit raycastHit = new VRRaycastHit();
raycastHit.collider = GetComponent <Collider>();
raycastHit.distance = t;
raycastHit.normal = vCrossU.normalized;
raycastHit.point = hitPoint;
raycastHit.textureCoord = uv;
return(raycastHit);
}
else
{
return(null);
}
}
protected void _RaySelection()
{
// Ray picking
Vector3 rayOrigin = transform.position;
Vector3 rayDirection = transform.TransformDirection(Vector3.forward);
VRSelection newSelection = null;
foreach (RaycastHit raycastHit in Physics.RaycastAll(rayOrigin, rayDirection, m_Wand.GetDefaultRayLength()))
{
if (newSelection != null && raycastHit.distance >= newSelection.SelectionDistance)
{
continue;
}
GameObject objectHit = raycastHit.collider.gameObject;
if (objectHit.name != "VRWand")
{
// Ignore GameObject without the VRActor component
if (objectHit.GetComponent<VRActor>() == null)
{
continue;
}
VRWebView webView = objectHit.GetComponent<VRWebView>();
VRRaycastHit completeHit = null;
if (webView != null)
{
completeHit = webView.RaycastMesh(rayOrigin, rayDirection);
}
else
{
completeHit = new VRRaycastHit(raycastHit);
}
if (completeHit != null)
{
// Special case : pass through transparent pixels of web views.
if (webView != null)
{
if (!webView.GetComponent<Renderer>().enabled || webView.IsPixelEmpty(completeHit.textureCoord))
{
continue;
}
}
// Create selection if it does not exist
if (newSelection == null)
{
newSelection = new VRSelection();
}
newSelection.SourceWand = m_Wand;
newSelection.SelectedObject = objectHit;
newSelection.TextureCoordinate = completeHit.textureCoord;
newSelection.SelectionDistance = completeHit.distance;
newSelection.SelectionContact = completeHit.point;
newSelection.SelectionNormal = completeHit.normal;
}
}
}
m_LastSelection = m_SelectionMgr.GetSelection();
m_SelectionMgr.SetSelection(newSelection);
}
private VRRaycastHit _RaycastTriangle(int i0, int i1, int i2, Vector3 rayOrigin, Vector3 rayDirection)
{
Vector3 p0 = transform.TransformPoint(m_RaycastMeshVertices[i0]);
Vector3 p1 = transform.TransformPoint(m_RaycastMeshVertices[i1]);
Vector3 p2 = transform.TransformPoint(m_RaycastMeshVertices[i2]);
// Möller–Trumbore intersection algorithm
// http://en.wikipedia.org/wiki/M%C3%B6ller%E2%80%93Trumbore_intersection_algorithm
// edge 1
Vector3 E1 = p1 - p0;
// edge 2
Vector3 E2 = p2 - p0;
// edge 3 - only for testing degenerate triangles
Vector3 E3 = p2 - p0;
if( E1.sqrMagnitude < 0.00001f || E2.sqrMagnitude < 0.00001f || E3.sqrMagnitude < 0.00001f )
{
// Skip degenerate triangle
return null;
}
//Begin calculating determinant - also used to calculate u parameter
Vector3 P = Vector3.Cross(rayDirection, E2);
float det = Vector3.Dot(E1, P);
if (det > -0.00001f && det < 0.00001f)
{
//if determinant is near zero, ray lies in plane of triangle
return null;
}
float inv_det = 1.0f / det;
//Calculate distance from V1 to ray origin
Vector3 T = rayOrigin - p0;
//Calculate u parameter and test bound
float u = Vector3.Dot(T, P) * inv_det;
if (u < 0.0f || u > 1.0f)
{
//The intersection lies outside of the triangle
return null;
}
//Prepare to test v parameter
Vector3 Q = Vector3.Cross(T, E1);
//Calculate V parameter and test bound
float v = Vector3.Dot(rayDirection, Q) * inv_det;
if (v < 0.0f || u + v > 1.0f)
{
//The intersection lies outside of the triangle
return null;
}
float t = Vector3.Dot(E2, Q) * inv_det;
if (t <= 0.00001f)
{
// Intersection is before origin
return null;
}
// We have an intersection, now compute uv
Vector3 hitPoint = rayOrigin + (rayDirection * t);
Vector3 w = hitPoint - p0;
Vector3 vCrossW = Vector3.Cross(E2, w);
Vector3 vCrossU = Vector3.Cross(E2, E1);
if (Vector3.Dot(vCrossW, vCrossU) < 0.0f)
{
return null;
}
Vector3 uCrossW = Vector3.Cross(E1, w);
Vector3 uCrossV = Vector3.Cross(E1, E2);
if (Vector3.Dot(uCrossW, uCrossV) < 0.0f)
{
return null;
}
float denom = uCrossV.magnitude;
float b1 = vCrossW.magnitude / denom;
float b2 = uCrossW.magnitude / denom;
if ((b1 <= 1.0f) && (b2 <= 1.0f) && (b1 + b2 <= 1.0f))
{
float b0 = 1.0f - b1 - b2;
Vector2 uv0 = m_RaycastMeshUV[i0];
Vector2 uv1 = m_RaycastMeshUV[i1];
Vector2 uv2 = m_RaycastMeshUV[i2];
Vector2 uv = new Vector2(b0 * uv0.x + b1 * uv1.x + b2 * uv2.x, b0 * uv0.y + b1 * uv1.y + b2 * uv2.y);
VRRaycastHit raycastHit = new VRRaycastHit();
raycastHit.collider = GetComponent<Collider>();
raycastHit.distance = t;
raycastHit.normal = vCrossU.normalized;
raycastHit.point = hitPoint;
raycastHit.textureCoord = uv;
return raycastHit;
}
else
{
return null;
}
}
protected void _RaySelection()
{
// Ray picking
Vector3 rayOrigin = transform.position;
Vector3 rayDirection = transform.TransformDirection(Vector3.forward);
VRSelection newSelection = null;
foreach (RaycastHit raycastHit in Physics.RaycastAll(rayOrigin, rayDirection, m_Wand.GetDefaultRayLength()))
{
if (newSelection != null && raycastHit.distance >= newSelection.SelectionDistance)
{
continue;
}
GameObject objectHit = raycastHit.collider.gameObject;
if (objectHit.name != "VRWand")
{
// Ignore GameObject without the VRActor component
if (objectHit.GetComponent <VRActor>() == null)
{
continue;
}
VRWebView webView = objectHit.GetComponent <VRWebView>();
VRRaycastHit completeHit = null;
if (webView != null)
{
completeHit = webView.RaycastMesh(rayOrigin, rayDirection);
}
else
{
completeHit = new VRRaycastHit(raycastHit);
}
if (completeHit != null)
{
// Special case : pass through transparent pixels of web views.
if (webView != null)
{
if (!webView.GetComponent <Renderer>().enabled || webView.IsPixelEmpty(completeHit.textureCoord))
{
continue;
}
}
// Create selection if it does not exist
if (newSelection == null)
{
newSelection = new VRSelection();
}
newSelection.SourceWand = m_Wand;
newSelection.SelectedObject = objectHit;
newSelection.TextureCoordinate = completeHit.textureCoord;
newSelection.SelectionDistance = completeHit.distance;
newSelection.SelectionContact = completeHit.point;
newSelection.SelectionNormal = completeHit.normal;
}
}
}
m_LastSelection = m_SelectionMgr.GetSelection();
m_SelectionMgr.SetSelection(newSelection);
}
