void _IButton.Translate(Vector2 d)
{
mAABB.Translate(d);
Vector3 d3 = new Vector3(d, 0);
mCorner2 += d3;
mCorner3 += d3;
mButtonCore.Translate(d);
}
void XICamera.Update(GameTime game_time)
{
if (mListener_WorldRegenerated.GetMaxOne() != null)
{
InitFromWorld();
}
XTouch.MultiDragData multi_drag_msg = mListener_MultiDrag.GetMaxOne();
if (multi_drag_msg != null)
{
if (multi_drag_msg.mFrameCount == 0)
{
mMultiDragPrev = multi_drag_msg;
}
// figure out zoom. damp so that human powered drag zoom is not jittery.
// it's not that there is anything wrong with the measurement or the calculation, it's
// that people don't seem to keep their fingers at constant separation when they mean to.
const float k_zoom_damping = 0.8f;
float ideal_zoom_ratio = (float)(mMultiDragPrev.mMaxScreenSeparation / multi_drag_msg.mMaxScreenSeparation);
float zoom_ratio = (mDampedMaxScreenSeparation > -1f) ?
(k_zoom_damping * mDampedMaxScreenSeparation + (1f - k_zoom_damping) * ideal_zoom_ratio) :
ideal_zoom_ratio;
mDampedMaxScreenSeparation = zoom_ratio;
// place new world view so that the zoom point in world space is at the same place on the screen.
Vector2 size_0 = mWorldView.GetSize();
Vector2 size_1 = zoom_ratio * size_0;
Vector2 avg_world_pos = CalcWorldPos(multi_drag_msg.mAvgScreenPos);
float pos_x_fraction = multi_drag_msg.mAvgScreenPos.X / mScreenDim.x;
float pos_y_fraction = multi_drag_msg.mAvgScreenPos.Y / mScreenDim.y;
float dx_world = pos_x_fraction * size_1.X;
float dy_world = pos_y_fraction * size_1.Y;
Vector2 p0 = new Vector2(avg_world_pos.X - dx_world, avg_world_pos.Y - dy_world);
Vector2 p1 = p0 + size_1;
xAABB2 world_view = new xAABB2(p0, p1);
// figure out translation
// this calculation assumes fullscreen, viewport not taken into consideration
Vector2 pixel_move = multi_drag_msg.mAvgScreenPos - mMultiDragPrev.mAvgScreenPos;
Vector2 screen_fraction = new Vector2(pixel_move.X / mScreenDim.x, pixel_move.Y / mScreenDim.y);
Vector2 world_view_size = world_view.GetSize();
Vector2 world_move = new Vector2(screen_fraction.X * world_view_size.X, screen_fraction.Y * world_view_size.Y);
world_view.Translate(-world_move);
mMultiDragPrev = multi_drag_msg;
// clamp and calc projection matrix
mWorldView = ClampWorldView(world_view);
CalcProjectionMatrix();
}
}
private void Translate(Vector2 t)
{
mAABB.Translate(t);
mPos = mAABB.GetMin();
// translate each button the same amount, and account for title
for (int i = 0; i < mSelections.Length; ++i)
{
mSelections[i].Translate(t);
}
mTitleButton.Translate(t);
}
public xAABB2 GetScreenAABB()
{
if (mParent != null)
{
xAABB2 parent_screen_aabb = mParent.GetPosition().GetScreenAABB();
xAABB2 aabb = mRelativeAABB;
aabb.Translate(parent_screen_aabb.GetMin());
return(aabb);
}
else
{
return(mRelativeAABB);
}
}
public void Translate(Vector2 v)
{
mRelativeAABB.Translate(v);
ValidateAABB();
}
public static void UnitTest()
{
xAABB2 aabb1 = new xAABB2();
XUtils.Assert(aabb1.mIsValid == false);
xAABB2 aabb2 = new xAABB2(Vector2.Zero);
xAABB2 aabb3 = new xAABB2(Vector2.Zero, 1f);
xAABB2 aabb4 = new xAABB2(Vector2.Zero, Vector2.Zero);
XUtils.Assert(aabb2.IsValid() && aabb3.IsValid() && aabb4.IsValid());
aabb2.Reset();
XUtils.Assert(!aabb2.IsValid());
Vector2 oneTwo = new Vector2(1f, 2f);
Vector2 negTwoFour = -2f * oneTwo;
Vector2 TwentyTen = new Vector2(20f, 10f);
const float kTol = 0.001f;
aabb2.Set(oneTwo);
XUtils.AssertVal(aabb2.mMin, oneTwo, kTol);
XUtils.AssertVal(aabb2.mMax, oneTwo, kTol);
XUtils.Assert(aabb2.IsValid());
//aabb2.Set( oneTwo, negTwoFour ); inside out, asserts, good
aabb2.Set(negTwoFour, oneTwo);
XUtils.Assert(aabb2.Contains(Vector2.Zero));
XUtils.Assert(!aabb2.Contains(TwentyTen));
XUtils.Assert(aabb2.Contains(negTwoFour));
XUtils.Assert(aabb2.Contains(oneTwo));
XUtils.Assert(!aabb2.Contains(-TwentyTen));
//aabb2.Set( oneTwo, -3f ); asserts on negative radius, good
Vector2 fiveFive = new Vector2(5f, 5f);
Vector2 sixSeven = oneTwo + fiveFive;
Vector2 negFourThree = new Vector2(-4f, -3f);
Vector2 epsilon = new Vector2(kTol, kTol);
aabb2.Set(oneTwo, 5f);
XUtils.Assert(aabb2.Contains(oneTwo));
XUtils.Assert(aabb2.Contains(fiveFive));
XUtils.Assert(aabb2.Contains(negFourThree));
XUtils.Assert(!aabb2.Contains(TwentyTen));
XUtils.Assert(!aabb2.Contains(-TwentyTen));
XUtils.Assert(aabb2.Contains(Vector2.Zero));
XUtils.Assert(aabb2.Contains(negFourThree + epsilon));
XUtils.Assert(!aabb2.Contains(negFourThree - epsilon));
XUtils.Assert(aabb2.Contains(sixSeven - epsilon));
XUtils.Assert(!aabb2.Contains(sixSeven + epsilon));
aabb2.Set(Vector2.Zero);
XUtils.Assert(!aabb2.IsNonDegenerate());
aabb2.Add(Vector2.UnitX);
XUtils.Assert(!aabb2.IsNonDegenerate());
XUtils.Assert(aabb2.Contains(new Vector2(0.5f, 0f)));
aabb2.Add(oneTwo);
XUtils.Assert(aabb2.IsNonDegenerate());
XUtils.Assert(aabb2.Contains(new Vector2(0.5f, 1f)));
aabb2.Reset();
aabb2.Add(Vector2.Zero);
XUtils.Assert(aabb2.IsValid());
aabb2.Reset();
aabb2.Add(-fiveFive);
aabb2.Add(TwentyTen);
XUtils.AssertVal(aabb2.GetMin(), -fiveFive, kTol);
XUtils.AssertVal(aabb2.GetMax(), TwentyTen, kTol);
XUtils.AssertVal(aabb2.GetCenter(), new Vector2(7.5f, 2.5f), kTol);
XUtils.AssertVal(aabb2.GetRadius(), new Vector2(12.5f, 7.5f), kTol);
XUtils.AssertVal(aabb2.GetSize(), new Vector2(25f, 15f), kTol);
XUtils.AssertVal(aabb2.GetArea(), 375f, kTol);
aabb2.Reset();
aabb2.Add(Vector2.Zero);
aabb2.Add(oneTwo);
aabb2.ScaleWorld(4f);
XUtils.AssertVal(aabb2.GetArea(), 32f, kTol);
aabb2.Translate(fiveFive);
Vector2 center2 = new Vector2(7f, 9f);
XUtils.AssertVal(aabb2.GetArea(), 32f, kTol);
XUtils.AssertVal(aabb2.GetCenter(), center2, kTol);
XUtils.Assert(!aabb2.Contains(oneTwo));
XUtils.Assert(aabb2.Contains(new Vector2(6f, 8f)));
//aabb2.ScaleWorld( -1f ); asserts negative scalar, good
//aabb2.ScaleLocal( -50f ); asserts negative scalar, good
aabb2.ScaleLocal(0.25f);
XUtils.AssertVal(aabb2.GetCenter(), center2, kTol);
XUtils.AssertVal(aabb2.GetArea(), 2f, kTol);
XUtils.Assert(!aabb2.Contains(new Vector2(6f, 8f)));
XUtils.Assert(aabb2.Contains(center2));
aabb2.Reset();
aabb2.Add(Vector2.Zero);
aabb2.Add(oneTwo);
aabb2.Resize(new Vector2(0.1f, -0.3f));
XUtils.AssertVal(aabb2.GetArea(), 1.68f, kTol);
XUtils.Assert(!aabb2.Contains(Vector2.Zero));
XUtils.Assert(aabb2.Contains(new Vector2(-0.05f, 1.4f)));
}