public override void OnDragging(ViewControl vc, Point scrPt)
{
if (m_hitRegion == HitRegion.None || m_activeOp == null || m_activeOp.NodeList.Count == 0)
{
return;
}
Matrix4F view = vc.Camera.ViewMatrix;
// compute world * view
Matrix4F wv = new Matrix4F();
wv.Mul(HitMatrix, view);
// create ray in view space.
Ray3F rayV = vc.GetRay(scrPt, vc.Camera.ProjectionMatrix);
Vec3F xAxis = wv.XAxis;
Vec3F yAxis = wv.YAxis;
Vec3F zAxis = wv.ZAxis;
Vec3F origin = wv.Translation;
m_scale = new Vec3F(1, 1, 1);
float scale = 1;
float a1, a2;
switch (m_hitRegion)
{
case HitRegion.XAxis:
case HitRegion.NegXAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, yAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, zAxis));
Vec3F axis = (a1 > a2 ? yAxis : zAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), xAxis);
if (m_hitRegion == HitRegion.NegXAxis)
{
dragAmount *= -1;
}
m_scale.X = 1.0f + dragAmount / m_hitScale;
scale = m_scale.X;
}
break;
case HitRegion.YAxis:
case HitRegion.NegYAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, zAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, xAxis));
Vec3F axis = (a1 > a2 ? zAxis : xAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), yAxis);
if (m_hitRegion == HitRegion.NegYAxis)
{
dragAmount *= -1;
}
m_scale.Y = 1.0f + dragAmount / m_hitScale;
scale = m_scale.Y;
}
break;
case HitRegion.ZAxis:
case HitRegion.NegZAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, xAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, yAxis));
Vec3F axis = (a1 > a2 ? xAxis : yAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), zAxis);
if (m_hitRegion == HitRegion.NegZAxis)
{
dragAmount *= -1;
}
m_scale.Z = 1.0f + dragAmount / m_hitScale;
scale = m_scale.Z;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
if (m_isUniformScaling)
{
m_scale = new Vec3F(scale, scale, scale);
}
// scale
for (int i = 0; i < m_activeOp.NodeList.Count; i++)
{
ITransformable node = m_activeOp.NodeList[i];
node.Scale = Vec3F.Mul(m_originalScales[i], m_scale);
Matrix4F mtrx = TransformUtils.CalcTransform(
Vec3F.ZeroVector,
node.Rotation,
node.Scale,
m_pivotOffset[i]);
node.Translation = m_originalTranslations[i] + mtrx.Translation;
}
}
public override void OnDragging(ViewControl vc, Point scrPt)
{
if (m_hitRegion == HitRegion.None || NodeList.Count == 0)
{
return;
}
Matrix4F view = vc.Camera.ViewMatrix;
// compute world * view
Matrix4F wv = new Matrix4F();
wv.Mul(HitMatrix, view);
// create ray in view space.
Ray3F rayV = vc.GetRay(scrPt, vc.Camera.ProjectionMatrix);
Vec3F xAxis = wv.XAxis;
Vec3F yAxis = wv.YAxis;
Vec3F zAxis = wv.ZAxis;
Vec3F origin = wv.Translation;
//Vec3F pos;
m_scale = new Vec3F(1, 1, 1);
float scale = 1;
float a1, a2;
switch (m_hitRegion)
{
case HitRegion.XAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, yAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, zAxis));
Vec3F axis = (a1 > a2 ? yAxis : zAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), xAxis);
m_scale.X = 1.0f + dragAmount / m_hitScale;
scale = m_scale.X;
}
break;
case HitRegion.YAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, zAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, xAxis));
Vec3F axis = (a1 > a2 ? zAxis : xAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), yAxis);
m_scale.Y = 1.0f + dragAmount / m_hitScale;
scale = m_scale.Y;
}
break;
case HitRegion.ZAxis:
{
a1 = Math.Abs(Vec3F.Dot(HitRayV.Direction, xAxis));
a2 = Math.Abs(Vec3F.Dot(HitRayV.Direction, yAxis));
Vec3F axis = (a1 > a2 ? xAxis : yAxis);
Vec3F p0 = HitRayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
Vec3F p1 = rayV.IntersectPlane(axis, -Vec3F.Dot(axis, origin));
float dragAmount = Vec3F.Dot((p1 - p0), zAxis);
m_scale.Z = 1.0f + dragAmount / m_hitScale;
scale = m_scale.Z;
}
break;
case HitRegion.FreeRect:
{
Vec3F axis = new Vec3F(0, 0, 1);
Vec3F p0 = HitRayV.IntersectPlane(axis, -origin.Z);
Vec3F p1 = rayV.IntersectPlane(axis, -origin.Z);
Vec3F dragVec = p1 - p0;
float dragAmount = 1.0f + dragVec.X / m_hitScale;
m_scale.X = dragAmount;
m_scale.Y = dragAmount;
m_scale.Z = dragAmount;
scale = m_scale.X;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
if (m_isUniformScaling)
{
m_scale = new Vec3F(scale, scale, scale);
}
// scale
for (int i = 0; i < NodeList.Count; i++)
{
ITransformable transformable = NodeList[i];
transformable.Scale = Vec3F.Mul(m_originalValues[i], m_scale);
}
}