public bool Intersects(Ray ray, out float? closestHitFraction)
{
//t = ( ray.Origin [dot] plane.Normal [plus] plane.Distance ) [divided by] ( ray.Direction [dot] plane.Normal )
closestHitFraction = null;
var numerator = -(Vector3.Dot(ray.Origin, this.Normal) + this.Distance);
var denominator = (Vector3.Dot(ray.Direction, this.Normal));
if (numerator == 0 || denominator == 0) return false;
closestHitFraction = numerator / denominator;
return true;
}
public void OnMouseDown(Ray mouseRay, MouseButton mouseButton)
{
}
public float? TestRayIntersection(Ray ray)
{
//Ray = P + tV;
var P = ray.Origin;
var V = ray.Direction;
var A = -axis;
// var X = //Vector3.Perpendicular(axis);
return null;
}
public void OnMouseMove(object sender, MouseEventArgs e)
{
if (Hidden) return;
if (selectedAxis != SelectedAxis.None)
{
Vector3 intersection;
var registrationOrigin = ProjectPoint(worldRegistrationPosition);
var registrationMouse = ProjectScreenPoint(new Vector3(e.ScreenCoordinates));
var mouseRay = new Ray(
Maths.Project(viewMatrix, projectionMatrix, registrationMouse.Xy, depth: -1, viewport: viewport).Xyz,
Maths.Project(viewMatrix, projectionMatrix, registrationMouse.Xy, depth: 1, viewport: viewport).Xyz
);
var registrationRay = new Ray(
Maths.Project(viewMatrix, projectionMatrix, registrationOrigin.Xy, depth: -1, viewport: viewport).Xyz,
Maths.Project(viewMatrix, projectionMatrix, registrationOrigin.Xy, depth: 1, viewport: viewport).Xyz
);
var viewerAxis = (mouseRay.Origin - origin).Normalized();
viewerAxis.Normalize();
// Setup and select the collision plane
var planeUNormal = new Vector3(0, 0, 0);
var planeVNormal = new Vector3(0, 0, 0);
var translationNormal = new Vector3(0, 0, 0);
if (selectedAxis.HasFlag(SelectedAxis.U))
{
planeUNormal = up;
planeVNormal = forward;
translationNormal = right;
}
else if (selectedAxis.HasFlag(SelectedAxis.V))
{
planeUNormal = right;
planeVNormal = up;
translationNormal = forward;
}
else if (selectedAxis.HasFlag(SelectedAxis.W))
{
planeUNormal = right;
planeVNormal = forward;
translationNormal = up;
}
else return;
Vector3.Normalize(ref planeUNormal, out planeUNormal);
Vector3.Normalize(ref planeVNormal, out planeVNormal);
Vector3.Normalize(ref translationNormal, out translationNormal);
// Calculate the perpendicularness values
var cosineToPlaneU = Vector3.Cross(viewerAxis, planeUNormal).LengthFast;
var cosineToPlaneV = Vector3.Cross(viewerAxis, planeVNormal).LengthFast;
// Select the most perpendicular plane
var translationPlaneNormal = planeUNormal;
if (cosineToPlaneU > cosineToPlaneV)
{
translationPlaneNormal = planeVNormal;
}
// Produce the plane-distance from origin from this obejcts position vector
var planeOffset = Vector3.Dot(translationPlaneNormal, origin);
var translationPlane = new Plane(translationPlaneNormal, -planeOffset);
float? hit, registrationHit;
if (translationPlane.Intersects(mouseRay, out hit)
&& translationPlane.Intersects(registrationRay, out registrationHit))
{
//// Debug drawing code
//GL.VertexAttrib3(1, new[] { 230f / 255f, 128f / 255f, 0f / 255f });
//DebugDrawer.DrawPlane(translationPlane);
//using (Form1.ScreenProgram.Use())
//{
// GL.VertexAttrib3(1, new[] { 225f / 255f, 128f / 255f, 255f / 255f });
// DebugDrawer.DrawPoint(mouseRay.Origin + mouseRay.Direction * hit.Value, pointSize: 7);
// GL.VertexAttrib3(1, new[] { 15f / 255f, 128f / 255f, 255f / 255f });
// DebugDrawer.DrawPoint(registrationRay.Origin + registrationRay.Direction * registrationHit.Value, pointSize: 9);
//}
var componentU = Vector3.Dot(planeUNormal, this.position) * planeUNormal;
var componentV = Vector3.Dot(planeVNormal, this.position) * planeVNormal;
var dot = Vector3.Dot(translationNormal, mouseRay.Origin + mouseRay.Direction * hit.Value);
var translation = translationNormal * Vector3.Dot(translationNormal, mouseRay.Origin + mouseRay.Direction * hit.Value);
var registrationOffset = translationNormal * Vector3.Dot(translationNormal, worldRegistrationPosition);
var actualtranslation = mouseRay.Origin + mouseRay.Direction * hit.Value;
this.Position = translation - registrationOffset + componentU + componentV;
}
}
}