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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#include "IntersectingRectangles.h"
WM5_WINDOW_APPLICATION(IntersectingRectangles);
// #define SINGLE_STEP
//----------------------------------------------------------------------------
IntersectingRectangles::IntersectingRectangles ()
:
WindowApplication2("SamplePhysics/IntersectingRectangles", 0, 0, 256, 256,
Float4(1.0f, 1.0f, 1.0f, 1.0f))
{
mManager = 0;
mLastIdle = 0.0f;
mSize = GetWidth();
mMouseDown = false;
}
//----------------------------------------------------------------------------
bool IntersectingRectangles::OnInitialize ()
{
if (!WindowApplication2::OnInitialize())
{
return false;
}
for (int i = 0; i < 16; ++i)
{
float xmin = Mathf::IntervalRandom(0.125f*mSize, 0.875f*mSize);
float xmax = xmin + Mathf::IntervalRandom(4.0f, 32.0f);
float ymin = Mathf::IntervalRandom(0.125f*mSize, 0.875f*mSize);
float ymax = ymin + Mathf::IntervalRandom(4.0f, 32.0f);
mRectangles.push_back(AxisAlignedBox2f(xmin, xmax, ymin, ymax));
}
mManager = new0 RectangleManagerf(mRectangles);
OnDisplay();
return true;
}
//----------------------------------------------------------------------------
void IntersectingRectangles::OnTerminate ()
{
delete0(mManager);
WindowApplication2::OnTerminate();
}
//----------------------------------------------------------------------------
void IntersectingRectangles::OnIdle ()
{
#ifndef SINGLE_STEP
float currIdle = (float)GetTimeInSeconds();
float diff = currIdle - mLastIdle;
if (diff >= 1.0f/30.0f)
{
ModifyRectangles();
OnDisplay();
mLastIdle = currIdle;
}
#endif
}
//----------------------------------------------------------------------------
void IntersectingRectangles::OnDisplay ()
{
ClearScreen();
DrawRectangles();
WindowApplication2::OnDisplay();
}
//----------------------------------------------------------------------------
bool IntersectingRectangles::OnKeyDown (unsigned char key, int x, int y)
{
if (WindowApplication2::OnKeyDown(key, x, y))
{
return true;
}
#ifdef SINGLE_STEP
switch (key)
{
case 'g':
case 'G':
ModifyRectangles();
OnDisplay();
return true;
}
#endif
return false;
}
//----------------------------------------------------------------------------
void IntersectingRectangles::ModifyRectangles ()
{
const int numRectangles = (int)mRectangles.size();
for (int i = 0; i < numRectangles; ++i)
{
AxisAlignedBox2f rectangle = mRectangles[i];
float dx = Mathf::IntervalRandom(-4.0f, 4.0f);
if (0.0f <= rectangle.Min[0] + dx && rectangle.Max[0] + dx < mSize)
{
rectangle.Min[0] += dx;
rectangle.Max[0] += dx;
}
float dy = Mathf::IntervalRandom(-4.0f, 4.0f);
if (0.0f <= rectangle.Min[1] + dy && rectangle.Max[1] + dy < mSize)
{
rectangle.Min[1] += dy;
rectangle.Max[1] += dy;
}
mManager->SetRectangle(i, rectangle);
}
mManager->Update();
}
//----------------------------------------------------------------------------
void IntersectingRectangles::DrawRectangles ()
{
ColorRGB gray(192,192,192), black(0,0,0), red(255,0,0);
int i, xmin, xmax, ymin, ymax;
const int numRectangles = (int)mRectangles.size();
for (i = 0; i < numRectangles; ++i)
{
const AxisAlignedBox2f& rectangle = mRectangles[i];
xmin = (int)rectangle.Min[0];
xmax = (int)rectangle.Max[0];
ymin = (int)rectangle.Min[1];
ymax = (int)rectangle.Max[1];
DrawRectangle(xmin, ymin, xmax, ymax, gray, true);
DrawRectangle(xmin, ymin, xmax, ymax, black);
}
const std::set<EdgeKey>& overlap = mManager->GetOverlap();
std::set<EdgeKey>::const_iterator iter = overlap.begin();
std::set<EdgeKey>::const_iterator end = overlap.end();
for (/**/; iter != end; ++iter)
{
int i0 = iter->V[0];
int i1 = iter->V[1];
const AxisAlignedBox2f& rectangle0 = mRectangles[i0];
const AxisAlignedBox2f& rectangle1 = mRectangles[i1];
AxisAlignedBox2f intr;
if (rectangle0.FindIntersection(rectangle1, intr))
{
xmin = (int)intr.Min[0];
xmax = (int)intr.Max[0];
ymin = (int)intr.Min[1];
ymax = (int)intr.Max[1];
DrawRectangle(xmin, ymin, xmax, ymax, red, true);
DrawRectangle(xmin, ymin, xmax, ymax, black);
}
}
}
//----------------------------------------------------------------------------
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