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();
}
}
public void Util_DrawBox(XSimpleDraw simple_draw, Style style, xAABB2 screen_aabb)
{
Vector3 lo_x_lo_y = new Vector3(screen_aabb.GetMin(), 0);
Vector3 hi_x_hi_y = new Vector3(screen_aabb.GetMax(), 0);
Vector2 size = screen_aabb.GetSize();
Vector3 lo_x_hi_y = lo_x_lo_y + new Vector3(0, size.Y, 0);
Vector3 hi_x_lo_y = lo_x_lo_y + new Vector3(size.X, 0, 0);
simple_draw.DrawQuad(lo_x_lo_y, hi_x_hi_y, style.mBackgroundColor);
simple_draw.DrawLine(lo_x_lo_y, hi_x_lo_y, style.mBorderColor);
simple_draw.DrawLine(hi_x_lo_y, hi_x_hi_y, style.mBorderColor);
simple_draw.DrawLine(hi_x_hi_y, lo_x_hi_y, style.mBorderColor);
simple_draw.DrawLine(lo_x_hi_y, lo_x_lo_y, style.mBorderColor);
}
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)));
}
public Selector(_Position pos, String title, eStyle style, eStyle button_style, eStyle title_style,
long id, String[] texts)
{
mRenderEnabled = true;
mID = id;
mPos = pos.GetPosition();
mPosition = pos;
mTitle = title;
mStyle = style;
mButtonStyle = button_style;
mTitleStyle = title_style;
this.mSelections = new _IButton[texts.Length];
// create a default button to see how big it is vertically
// size and position border accordingly, factoring in width of largest button including title
// destroy that button
// create all the proper buttons in the right spot
// create title 'button' as disabled button
XUI xui_inst = XUI.Instance();
_IButton test = xui_inst._CreateRectangularButton(Vector2.Zero, "Test", style);
xAABB2 button_size = test.GetAABB();
float button_size_y = button_size.GetSize().Y;
xui_inst._DestroyButton(test);
const float k_border_padding_scalar = 0.5f;
float border_padding = k_border_padding_scalar * button_size_y;
const float k_spacing_scalar = 0.2f;
float spacing = k_spacing_scalar * button_size_y;
// pad out the text strings so the buttons can be wide if the text is small
int longest = GetLongestString(texts);
PadButtonTexts(texts, longest);
// create buttons
PositionAndCreateButtons(texts, mSelections, border_padding, spacing, button_size_y, button_style, 0);
// track largest
float largest_x = GetWidest(mSelections);
// create title button (non-functional) and see if it's the largest
Vector2 title_pos = mPos + new Vector2(border_padding, border_padding);
mTitleButton = xui_inst._CreateRectangularButton(title_pos, title, title_style);
mTitleButton.SetActive(false);
largest_x = Math.Max(largest_x, mTitleButton.GetAABB().GetSize().X);
// calculate aabb
const float title_padding_scalar = 4.0f;
float title_padding = border_padding * title_padding_scalar;
Vector2 title_padding_v = new Vector2(0, title_padding);
float full_width = largest_x + 2 * border_padding;
float full_height = button_size_y * (mSelections.Length) +
(mSelections.Length - 1) * spacing +
2 * border_padding +
title_padding;
mAABB.Set(mPos, mPos + new Vector2(full_width, full_height));
// translate each button to be centered, and account for title
CenterButtons(mSelections, largest_x, title_padding);
CenterButton(mTitleButton, largest_x, 0);
// if the selector has a non-trivial Position, fix it
if (mPosition.IsCentered())
{
// see where it is now, figure out where it should be, translate.
// apply to aabb for selector plus translate all the buttons
xCoord screen_dim = XRenderManager.Instance().GetScreenDim();
Vector2 span = mAABB.GetSize();
Vector2 screen_dim_vec = new Vector2(screen_dim.x, screen_dim.y);
Vector2 edge = 0.5f * (screen_dim_vec - span);
Translate(edge);
}
}
