protected override void OnMouseDown(MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
// Try to do gizmo picking
if (DrawGizmo)
{
var result = _gizmo.DoPicking(GetRay(e.X, e.Y));
if (result != null)
{
_gizmo.ActivateGizmo(result);
Invalidate();
return;
}
}
// Try to do node picking
WadMeshBoneNode foundNode = null;
foreach (var node in Skeleton)
{
float distance = 0;
float minDistance = float.PositiveInfinity;
if (DoNodePicking(GetRay(e.X, e.Y), node, out distance))
{
if (distance < minDistance)
{
distance = minDistance;
foundNode = node;
}
}
}
SelectedNode = foundNode;
}
Invalidate();
_lastX = e.X;
_lastY = e.Y;
base.OnMouseDown(e);
}
private bool DoNodePicking(Ray ray, WadMeshBoneNode node, out float nodeDistance)
{
nodeDistance = 0;
// Transform view ray to object space space
Matrix4x4 inverseObjectMatrix;
if (!Matrix4x4.Invert(node.GlobalTransform, out inverseObjectMatrix))
{
return(false);
}
Vector3 transformedRayPos = MathC.HomogenousTransform(ray.Position, inverseObjectMatrix);
Vector3 transformedRayDestination = MathC.HomogenousTransform(ray.Position + ray.Direction, inverseObjectMatrix);
Ray transformedRay = new Ray(transformedRayPos, transformedRayDestination - transformedRayPos);
transformedRay.Direction = Vector3.Normalize(transformedRay.Direction);
// Now do a ray - triangle intersection test
bool hit = false;
float minDistance = float.PositiveInfinity;
var mesh = node.WadMesh;
foreach (var poly in mesh.Polys)
{
if (poly.Shape == WadPolygonShape.Quad)
{
Vector3 p1 = mesh.VerticesPositions[poly.Index0];
Vector3 p2 = mesh.VerticesPositions[poly.Index1];
Vector3 p3 = mesh.VerticesPositions[poly.Index2];
Vector3 p4 = mesh.VerticesPositions[poly.Index3];
float distance;
if (Collision.RayIntersectsTriangle(transformedRay, p1, p2, p3, out distance) && distance < minDistance)
{
minDistance = distance;
hit = true;
}
if (Collision.RayIntersectsTriangle(transformedRay, p1, p3, p4, out distance) && distance < minDistance)
{
minDistance = distance;
hit = true;
}
}
else
{
Vector3 p1 = mesh.VerticesPositions[poly.Index0];
Vector3 p2 = mesh.VerticesPositions[poly.Index1];
Vector3 p3 = mesh.VerticesPositions[poly.Index2];
float distance;
if (Collision.RayIntersectsTriangle(transformedRay, p1, p2, p3, out distance) && distance < minDistance)
{
minDistance = distance;
hit = true;
}
}
}
/*
* _wadRenderer.Dispose();
* foreach (var submesh in node.Bone.Children.Select(bone => bone.Mesh))
* for (int k = 0; k < submesh.Value.Indices.Count; k += 3)
* {
* var mesh = _wadRenderer.GetStatic(new WadStatic(new WadStaticId(0)) { Mesh = node.WadMesh });
*
* Vector3 p1 = mesh.Vertices[submesh.Value.Indices[k]].Position;
* Vector3 p2 = mesh.Vertices[submesh.Value.Indices[k + 1]].Position;
* Vector3 p3 = mesh.Vertices[submesh.Value.Indices[k + 2]].Position;
*
* float distance;
* if (Collision.RayIntersectsTriangle(transformedRay, p1, p2, p3, out distance) && distance < minDistance)
* {
* minDistance = distance;
* hit = true;
* }
* }*/
// TODO Avoid using the renderer for pickingData transforms need to be available in wad mesh without rendering.
int TODO_DoNodePicking;
if (hit)
{
nodeDistance = minDistance;
return(true);
}
else
{
return(false);
}
}
