public void Render(Graphics.Graphics graphics)
{
switch (Mode)
{
case HandleMode.Resize:
for (int i = 0; i < BRUSH_MANIPULATION_HANDLE_COUNT; i++)
{
SolidGrabHandle handle = mHandles[i];
graphics.DrawSolidRectangle(handle.BottomLeft, handle.BottomRight,
handle.TopRight, handle.TopLeft, Color.White);
}
break;
case HandleMode.Rotate:
for (int i = 0; i < 4; i++)
{
SolidGrabHandle handle = mHandles[i];
graphics.DrawSolidCircle(handle.BottomLeft, handle.BottomRight,
handle.TopRight, handle.TopLeft, Color.White);
}
break;
case HandleMode.Skew:
for (int i = 4; i < 8; i++)
{
SolidGrabHandle handle = mHandles[i];
graphics.DrawSolidRectangle(handle.BottomLeft, handle.BottomRight,
handle.TopRight, handle.TopLeft, Color.White);
}
break;
}
}
/// <summary>
/// Returns integer indicating which handle was touched.
/// For vertex mode it returns the indices for the touched grabhandle for the vertex
/// </summary>
/// <param name="ray"></param>
/// <returns></returns>
public int CheckHit(Ray ray)
{
if (mHandles.Count <= 0)
{
return((int)(LastHitStatus = HitStatus.None));
}
// default HandleMode.Resize
int startIndex = 0;
int endIndex = BRUSH_MANIPULATION_HANDLE_COUNT;
if (Mode == HandleMode.Rotate)
{
endIndex = 4;
}
else if (Mode == HandleMode.Skew)
{
startIndex = 4;
}
for (int i = startIndex; i < endIndex; i++)
{
SolidGrabHandle handle = mHandles[i];
if (ray.IsIntersecting(handle.BottomLeft, handle.BottomRight, handle.TopRight, handle.TopLeft))
{
return((int)(LastHitStatus = (HitStatus)i + 1));
}
}
return((int)(LastHitStatus = HitStatus.None));
}
public void CreateHandles(MapObject brush, Matrix4 viewMatrix, float zoomFactor = 1.0f)
{
AABB brushBounds = brush.Bounds;
Vector3 hBase = viewMatrix.Row0.Xyz;
Vector3 vBase = viewMatrix.Row1.Xyz;
float positionOffset = (HANDLE_SIZE / 2.0f + HANDLE_OFFSET) * zoomFactor;
float halfHandleSize = HANDLE_SIZE / 2 * zoomFactor;
mHandles.Clear();
Vector3 center = brushBounds.Center;
Vector3 diagonal = (brushBounds.Max - brushBounds.Min) * 0.5f;
// we add positionOffset in each direction to offset the position for the handles
Vector3 hOffset = Vector3.Multiply(hBase, diagonal) + hBase * positionOffset;
Vector3 vOffset = Vector3.Multiply(vBase, diagonal) + vBase * positionOffset;
List <Vector3> points = new List <Vector3>()
{
center - hOffset + vOffset, // top left handle
center + hOffset + vOffset, // top right handle
center - hOffset - vOffset, // bottom left handle
center + hOffset - vOffset, // bottom right handle
center + vOffset, // Top
center - vOffset, // Bottom
center - hOffset, // Left
center + hOffset // Right
};
foreach (Vector3 position in points)
{
Vector3 bottomLeft = position + (-hBase - vBase) * halfHandleSize;
Vector3 bottomRight = position + (hBase - vBase) * halfHandleSize;
Vector3 topRight = position + (hBase + vBase) * halfHandleSize;
Vector3 topLeft = position + (-hBase + vBase) * halfHandleSize;
SolidGrabHandle grabHandle = new SolidGrabHandle();
grabHandle.Set(bottomLeft, bottomRight, topRight, topLeft);
mHandles.Add(grabHandle);
}
}
