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#include "Bus.h"
Bus::Bus() : Element() {}
Bus::Bus(wxPoint2DDouble position) : Element()
{
m_width = 100.0;
m_height = 5.0;
SetPosition(position);
}
Bus::~Bus() {}
void Bus::Draw(wxPoint2DDouble translation, double scale) const
{
// Draw selection (layer 1)
if(m_selected) {
// If the object is selected, the matrix is reset to remove scale effects applied to it, thus keeping the
// edges with fixed sizes for all zoom levels.
glPushMatrix();
glLoadIdentity();
// The matrix was reset, so we must use screen coordinates (WorldToScreen).
wxPoint2DDouble screenPt = WorldToScreen(translation, scale);
glTranslated(screenPt.m_x, screenPt.m_y, 0.0);
glRotated(m_angle, 0.0, 0.0, 1.0);
glTranslated(-screenPt.m_x, -screenPt.m_y, 0.0);
glColor4d(0.0, 0.5, 1.0, 0.5);
wxPoint2DDouble pts[4] = {WorldToScreen(translation, scale, -(m_width / 2.0), -(m_height / 2.0)) -
wxPoint2DDouble(m_borderSize, m_borderSize),
WorldToScreen(translation, scale, -(m_width / 2.0), (m_height / 2.0)) -
wxPoint2DDouble(m_borderSize, -m_borderSize),
WorldToScreen(translation, scale, (m_width / 2.0), (m_height / 2.0)) -
wxPoint2DDouble(-m_borderSize, -m_borderSize),
WorldToScreen(translation, scale, (m_width / 2.0), -(m_height / 2.0)) -
wxPoint2DDouble(-m_borderSize, m_borderSize)};
DrawRectangle(pts);
glPopMatrix();
}
// Draw element (layer 2)
// Push the current matrix on stack.
glPushMatrix();
// Rotate the matrix around the object position.
glTranslated(m_position.m_x, m_position.m_y, 0.0);
glRotated(m_angle, 0.0, 0.0, 1.0);
glTranslated(-m_position.m_x, -m_position.m_y, 0.0);
glColor4d(0.0, 0.3, 1.0, 1.0);
DrawRectangle(m_position, m_width, m_height);
// Pop the old matrix back.
glPopMatrix();
// Draw pickbox (layer 3)
if(m_showPickbox) {
glPushMatrix();
glLoadIdentity();
wxPoint2DDouble screenPt = WorldToScreen(translation, scale);
glTranslated(screenPt.m_x, screenPt.m_y, 0.0);
glRotated(m_angle, 0.0, 0.0, 1.0);
glTranslated(-screenPt.m_x, -screenPt.m_y, 0.0);
wxPoint2DDouble pbPosition[2] = {WorldToScreen(translation, scale, m_width / 2.0),
WorldToScreen(translation, scale, -m_width / 2.0)};
DrawPickbox(pbPosition[0]);
DrawPickbox(pbPosition[1]);
glPopMatrix();
}
}
bool Bus::Contains(wxPoint2DDouble position) const
{
wxPoint2DDouble ptR = RotateAtPosition(position, -m_angle);
return m_rect.Contains(ptR);
}
bool Bus::Intersects(wxRect2DDouble rect) const
{
if(m_angle == 0.0 || m_angle == 180.0) return m_rect.Intersects(rect);
wxPoint2DDouble m_rectCorners[4] = {m_rect.GetLeftTop(), m_rect.GetLeftBottom(), m_rect.GetRightBottom(),
m_rect.GetRightTop()};
wxPoint2DDouble rectCorners[4] = {rect.GetLeftTop(), rect.GetLeftBottom(), rect.GetRightBottom(),
rect.GetRightTop()};
// Rotate the m_rect corners
for(int i = 0; i < 4; i++) {
m_rectCorners[i] = RotateAtPosition(m_rectCorners[i], m_angle);
}
//[Ref] http://www.gamedev.net/page/resources/_/technical/game-programming/2d-rotated-rectangle-collision-r2604
// Find the rectangles axis to project
wxPoint2DDouble axis[4] = {m_rectCorners[3] - m_rectCorners[0], m_rectCorners[3] - m_rectCorners[2],
rectCorners[3] - rectCorners[0], rectCorners[3] - rectCorners[2]};
// Calculate the projected points to each axis
wxPoint2DDouble m_rectProjPts[4][4]; // [axis][corner]
wxPoint2DDouble rectProjPts[4][4]; // [axis][corner]
for(int i = 0; i < 4; i++) {
double den = axis[i].m_x * axis[i].m_x + axis[i].m_y * axis[i].m_y;
for(int j = 0; j < 4; j++) {
double m_rectProj = (m_rectCorners[j].m_x * axis[i].m_x + m_rectCorners[j].m_y * axis[i].m_y) / den;
double rectProj = (rectCorners[j].m_x * axis[i].m_x + rectCorners[j].m_y * axis[i].m_y) / den;
m_rectProjPts[i][j] = wxPoint2DDouble(m_rectProj * axis[i].m_x, m_rectProj * axis[i].m_y);
rectProjPts[i][j] = wxPoint2DDouble(rectProj * axis[i].m_x, rectProj * axis[i].m_y);
}
}
// Calculate the scalar value to identify the max and min values on projections
double m_rectScalar[4][4]; //[axis][corner]
double rectScalar[4][4]; //[axis][corner]
for(int i = 0; i < 4; i++) {
for(int j = 0; j < 4; j++) {
m_rectScalar[i][j] = m_rectProjPts[i][j].m_x * axis[i].m_x + m_rectProjPts[i][j].m_y * axis[i].m_y;
rectScalar[i][j] = rectProjPts[i][j].m_x * axis[i].m_x + rectProjPts[i][j].m_y * axis[i].m_y;
}
}
// Identify the max and min values
double m_rectMin[4];
double m_rectMax[4];
double rectMin[4];
double rectMax[4];
for(int i = 0; i < 4; i++) {
m_rectMax[i] = m_rectScalar[i][0];
rectMax[i] = rectScalar[i][0];
m_rectMin[i] = m_rectScalar[i][0];
rectMin[i] = rectScalar[i][0];
for(int j = 1; j < 4; j++) {
if(m_rectMax[i] < m_rectScalar[i][j]) m_rectMax[i] = m_rectScalar[i][j];
if(rectMax[i] < rectScalar[i][j]) rectMax[i] = rectScalar[i][j];
if(m_rectMin[i] > m_rectScalar[i][j]) m_rectMin[i] = m_rectScalar[i][j];
if(rectMin[i] > rectScalar[i][j]) rectMin[i] = rectScalar[i][j];
}
}
// Check if any segment don't overlap
for(int i = 0; i < 4; i++) {
if(!(rectMin[i] <= m_rectMax[i] && rectMax[i] >= m_rectMin[i])) return false;
}
return true;
// return rect.Intersects(m_rect);
}
bool Bus::PickboxContains(wxPoint2DDouble position)
{
m_activePickboxID = ID_PB_NONE;
wxPoint2DDouble ptR = RotateAtPosition(position, -m_angle);
wxPoint2DDouble center(m_position.m_x + m_width / 2.0, m_position.m_y);
wxRect2DDouble rectRight(center.m_x - 5.0, center.m_y - 5.0, 10.0, 10.0);
center = wxPoint2DDouble(m_position.m_x - m_width / 2.0, m_position.m_y);
wxRect2DDouble rectLeft(center.m_x - 5.0, center.m_y - 5.0, 10.0, 10.0);
if(rectRight.Contains(ptR)) {
m_activePickboxID = ID_PB_RIGHT;
return true;
}
if(rectLeft.Contains(ptR)) {
m_activePickboxID = ID_PB_LEFT;
return true;
}
return false;
}
wxCursor Bus::GetBestPickboxCursor() const
{
double angle = m_angle;
while(angle >= 157.5) angle -= 180.0;
if(angle >= -22.5 && angle < 22.5)
return wxCursor(wxCURSOR_SIZEWE);
else if(angle >= 22.5 && angle < 67.5)
return wxCursor(wxCURSOR_SIZENWSE);
else if(angle >= 67.5 && angle < 112.5)
return wxCursor(wxCURSOR_SIZENS);
else if(angle >= 112.5 && angle < 157.5)
return wxCursor(wxCURSOR_SIZENESW);
return wxCursor(wxCURSOR_ARROW);
}
void Bus::MovePickbox(wxPoint2DDouble position)
{
if(m_activePickboxID == ID_PB_NONE) return;
wxPoint2DDouble ptR = RotateAtPosition(position, -m_angle);
double dx = 0.0;
if(m_activePickboxID == ID_PB_RIGHT)
dx = ptR.m_x - m_position.m_x - m_width / 2.0;
else if(m_activePickboxID == ID_PB_LEFT)
dx = m_position.m_x - m_width / 2.0 - ptR.m_x;
if(m_width + dx < 20.0) return;
if(m_activePickboxID == ID_PB_RIGHT) {
m_position.m_x += (dx / 2.0) * std::cos(wxDegToRad(m_angle));
m_position.m_y += (dx / 2.0) * std::sin(wxDegToRad(m_angle));
}
else if(m_activePickboxID == ID_PB_LEFT)
{
m_position.m_x -= (dx / 2.0) * std::cos(wxDegToRad(m_angle));
m_position.m_y -= (dx / 2.0) * std::sin(wxDegToRad(m_angle));
}
m_width += dx;
SetPosition(m_position);
}
void Bus::Rotate()
{
m_angle += m_rotationAngle;
if(m_angle >= 360.0) m_angle = 0.0;
}
bool Bus::GetContextMenu(wxMenu& menu)
{
menu.Append(ID_EDIT_BUS, _("Edit bus"));
menu.Append(ID_ROTATE, _("Rotate"));
return true;
}
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