本文整理汇总了C++中Box2d类的典型用法代码示例。如果您正苦于以下问题：C++ Box2d类的具体用法？C++ Box2d怎么用？C++ Box2d使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Box2d类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: rect
float mgnear::quadSplinesHit(int n, const Point2d* knots, bool closed,
const Point2d& pt, float tol, Point2d& nearpt, int& segment)
{
Point2d ptTemp;
float dist, distMin = _FLT_MAX;
Point2d pts[3 + 4];
const Box2d rect (pt, 2 * tol, 2 * tol);
segment = -1;
for (int i = 0; i < (closed ? n : n - 2); i++, pts[0] = pts[2]) {
if (i == 0) {
pts[0] = closed ? (knots[0] + knots[1]) / 2 : knots[0];
}
pts[1] = knots[(i+1) % n];
if (closed || i + 3 < n)
pts[2] = (knots[(i+1) % n] + knots[(i+2) % n]) / 2;
else
pts[2] = knots[i+2];
mgcurv::quadBezierToCubic(pts, pts + 3);
if (rect.isIntersect(computeCubicBox(pts + 3))) {
dist = mgnear::nearestOnBezier(pt, pts + 3, ptTemp);
if (dist < distMin) {
distMin = dist;
nearpt = ptTemp;
segment = i;
}
}
}
return distMin;
}示例2: box
void NormalFilter::render(const ITextureObject& texture, const ICamera<float>& renderedCamera)
{
const Box2d<float> box(Vector2d<float>(-1.0, -1.0), Vector2d<float>(1.0, 1.0));
const auto& positions = box.toArray();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
//glDisable(GL_DEPTH_TEST);
glUseProgram(shader.getId());
texture.bind();
//glGetUniformLocation( texture.getId()
glUniform1i(shader.getUniformLocation("depthTex"), texture.getId());
glUniform1f(shader.getUniformLocation("texelSizeW"), 1.0f / static_cast<float>(texture.getWidth()));
glUniform1f(shader.getUniformLocation("texelSizeH"), 1.0f / static_cast<float>(texture.getHeight()));
glUniformMatrix4fv(shader.getUniformLocation("projectionMatrix"), 1, GL_FALSE, renderedCamera.getProjectionMatrix().toArray().data());
glVertexAttribPointer(shader.getAttribLocation("positions"), 2, GL_FLOAT, GL_FALSE, 0, positions.data());
glEnableVertexAttribArray(0);
glDrawArrays(GL_QUADS, 0, static_cast<GLsizei>( positions.size() / 2) );
glDisableVertexAttribArray(0);
glBindFragDataLocation(shader.getId(), 0, "fragColor");
texture.unbind();
glDisable(GL_DEPTH_TEST);
glUseProgram(0);
}示例3: setClipBox
bool GiGraphics::setClipBox(const RECT_2D& rc)
{
if (m_impl->drawRefcnt < 1)
return false;
bool ret = false;
Box2d rect;
if (!rect.intersectWith(Box2d(rc), Box2d(m_impl->clipBox0)).isEmpty())
{
if (rect != Box2d(m_impl->clipBox))
{
rect.get(m_impl->clipBox);
m_impl->rectDraw.set(Box2d(rc));
m_impl->rectDraw.inflate(GiGraphicsImpl::CLIP_INFLATE);
m_impl->rectDrawM = m_impl->rectDraw * xf().displayToModel();
m_impl->rectDrawW = m_impl->rectDrawM * xf().modelToWorld();
SafeCall(m_impl->canvas, clipRect(m_impl->clipBox.left, m_impl->clipBox.top,
m_impl->clipBox.width(),
m_impl->clipBox.height()));
}
ret = true;
}
return ret;
}示例4: box
bool GiGraphics::setClipWorld(const Box2d& rectWorld)
{
bool ret = false;
if (isDrawing() && !rectWorld.isEmpty())
{
Box2d box (rectWorld * xf().worldToDisplay());
box.intersectWith(Box2d(m_impl->clipBox0));
if (!box.isEmpty(Tol(1, 0)))
{
if (box != Box2d(m_impl->clipBox))
{
box.get(m_impl->clipBox);
m_impl->rectDraw = box;
m_impl->rectDraw.inflate(GiGraphicsImpl::CLIP_INFLATE);
m_impl->rectDrawM = m_impl->rectDraw * xf().displayToModel();
m_impl->rectDrawW = m_impl->rectDrawM * xf().modelToWorld();
SafeCall(m_impl->canvas, _clipBoxChanged(m_impl->clipBox));
}
ret = true;
}
}
return ret;
}示例5: pt1
float MgEllipse::_hitTest(const Point2d& pt, float tol, MgHitResult& res) const
{
if (isCircle()) {
Point2d pt1(getCenter()), pt2(pt);
crossCircle(pt1, pt2, this);
float d1 = pt.distanceTo(pt1);
float d2 = pt.distanceTo(pt2);
res.nearpt = d1 < d2 ? pt1 : pt2;
return mgMin(d1, d2);
}
float distMin = _FLT_MAX;
const Box2d rect (pt, 2 * tol, 2 * tol);
Point2d ptTemp;
for (int i = 0; i < 4; i++) {
if (rect.isIntersect(Box2d(4, _bzpts + 3 * i))) {
mgnear::nearestOnBezier(pt, _bzpts + 3 * i, ptTemp);
float dist = pt.distanceTo(ptTemp);
if (dist <= tol && dist < distMin) {
distMin = dist;
res.nearpt = ptTemp;
res.segment = i;
}
}
}
return distMin;
}示例6: rect
float MgEllipse::_hitTest(const Point2d& pt, float tol,
Point2d& nearpt, int& segment) const
{
float distMin = _FLT_MAX;
const Box2d rect (pt, 2 * tol, 2 * tol);
Point2d ptTemp;
segment = -1;
for (int i = 0; i < 4; i++)
{
if (rect.isIntersect(Box2d(4, _bzpts + 3 * i)))
{
mgNearestOnBezier(pt, _bzpts + 3 * i, ptTemp);
float dist = pt.distanceTo(ptTemp);
if (dist <= tol && dist < distMin)
{
distMin = dist;
nearpt = ptTemp;
segment = i;
}
}
}
return distMin;
}示例7: box
void OnScreenRenderer::render(const ITextureObject& texture)
{
const Box2d<float> box(Vector2d<float>(-1.0, -1.0), Vector2d<float>(1.0, 1.0));
const auto& positions = box.toArray();
//glEnable(GL_DEPTH_TEST);
glUseProgram(shader.getId());
texture.bind();
glUniform1i(shader.getUniformLocation("texture"), texture.getId());
glVertexAttribPointer(shader.getAttribLocation("positions"), 2, GL_FLOAT, GL_FALSE, 0, positions.data());
glEnableVertexAttribArray(0);
glDrawArrays(GL_QUADS, 0, static_cast<GLsizei>( positions.size() / 2) );
glDisableVertexAttribArray(0);
glBindFragDataLocation(shader.getId(), 0, "fragColor");
texture.unbind();
//glDisable(GL_DEPTH_TEST);
glUseProgram(0);
}示例8: PQ2
inline Pt2dr PQ2(const Box2d<Type> & b,INT c1,INT c2)
{
return Pt2dr
(
b.x(TAB_IND_Q2X[c1][c2]),
b.y(TAB_IND_Q2Y[c1][c2])
);
}示例9: box
bool mglnrel::clipLine(Point2d& pt1, Point2d& pt2, const Box2d& _box)
{
Box2d box (_box);
box.normalize();
unsigned code1, code2;
code1 = ClipCode(pt1, box);
code2 = ClipCode(pt2, box);
for ( ; ; )
{
if (!(code1 | code2)) // 完全在矩形内
return true;
if (code1 & code2) // 完全在矩形外
return false;
float x = 0.f, y = 0.f;
unsigned code;
if (code1) // 起点不在矩形内
code = code1;
else // 终点不在矩形内
code = code2;
if (code & 0x1000) // 上
{
x = pt1.x + (pt2.x - pt1.x) * (box.ymax - pt1.y) / (pt2.y - pt1.y);
y = box.ymax;
}
else if (code & 0x0100) // 下
{
x = pt1.x + (pt2.x - pt1.x) * (box.ymin - pt1.y) / (pt2.y - pt1.y);
y = box.ymin;
}
else if (code & 0x0001) // 左
{
y = pt1.y + (pt2.y - pt1.y) * (box.xmin - pt1.x) / (pt2.x - pt1.x);
x = box.xmin;
}
else if (code & 0x0010) // 右
{
y = pt1.y + (pt2.y - pt1.y) * (box.xmax - pt1.x) / (pt2.x - pt1.x);
x = box.xmax;
}
if (code == code1)
{
pt1.x = x;
pt1.y = y;
code1 = ClipCode(pt1, box);
}
else
{
pt2.x = x;
pt2.y = y;
code2 = ClipCode(pt2, box);
}
}
}示例10: drawRect
bool GiGraphics::drawRect(const GiContext* ctx, const Box2d& rect,
bool modelUnit)
{
Point2d points[4] = {
rect.leftBottom(), rect.rightBottom(),
rect.rightTop(), rect.leftTop()
};
return drawPolygon(ctx, 4, points, modelUnit);
}示例11: Box2d
void CScrollShapeView::OnZoomed()
{
CRandomShapeView::OnZoomed();
Box2d rect;
// m_rcLimits: 极限范围对应的坐标范围, 像素
rect = m_shapes->getExtent() * m_graph->xf.modelToDisplay();
rect.inflate(1, 1);
rect.get(m_rcLimits);
// m_rcScrWnd: 当前窗口对应的坐标范围, 像素
rect = Box2d(m_graph->xf.getCenterW(),
m_graph->xf.getWidth() / m_graph->xf.getWorldToDisplayX(),
m_graph->xf.getHeight() / m_graph->xf.getWorldToDisplayY());
rect *= m_graph->xf.worldToDisplay();
rect.get(m_rcScrWnd);
// 以m_rcLimits左上角为原点调整m_rcScrWnd和m_rcLimits
::OffsetRect(&m_rcScrWnd, -m_rcLimits.left, -m_rcLimits.top);
::OffsetRect(&m_rcLimits, -m_rcLimits.left, -m_rcLimits.top);
// 避免m_rcScrWnd部分超出m_rcLimits
::UnionRect(&m_rcLimits, &m_rcLimits, &m_rcScrWnd);
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_RANGE | SIF_PAGE | SIF_POS;
si.nMin = 0;
if (m_rcLimits.right - m_rcLimits.left > m_rcScrWnd.right - m_rcScrWnd.left)
{
si.nMax = max(1, m_rcLimits.right - m_rcLimits.left);
si.nPage = m_rcScrWnd.right - m_rcScrWnd.left;
si.nPos = m_rcScrWnd.left;
::EnableScrollBar(m_hWnd, SB_HORZ, ESB_ENABLE_BOTH);
::SetScrollInfo(m_hWnd, SB_HORZ, &si, TRUE);
}
else
{
::EnableScrollBar(m_hWnd, SB_HORZ, ESB_DISABLE_BOTH);
}
if (m_rcLimits.bottom - m_rcLimits.top > m_rcScrWnd.bottom - m_rcScrWnd.top)
{
si.nMax = max(1, m_rcLimits.bottom - m_rcLimits.top);
si.nPage = m_rcScrWnd.bottom - m_rcScrWnd.top;
si.nPos = m_rcScrWnd.top;
::EnableScrollBar(m_hWnd, SB_VERT, ESB_ENABLE_BOTH);
::SetScrollInfo(m_hWnd, SB_VERT, &si, TRUE);
}
else
{
::EnableScrollBar(m_hWnd, SB_VERT, ESB_DISABLE_BOTH);
}
}示例12: getExtent
Box2d MgShapeDoc::getExtent() const
{
Box2d rect;
for (unsigned i = 0; i < im->layers.size(); i++) {
rect.unionWith(im->layers[i]->getExtent());
}
return rect;
}示例13: drawRoundRect
bool GiGraphics::drawRoundRect(const GiContext* ctx,
const Box2d& rect, float rx, float ry,
bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || rect.isEmpty())
return false;
GiLock lock (&m_impl->drawRefcnt);
bool ret = false;
if (ry < _MGZERO)
ry = rx;
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(rect)) // 全部在显示区域外
return false;
if (rx < _MGZERO)
{
Point2d points[4] = {
rect.leftBottom(), rect.rightBottom(),
rect.rightTop(), rect.leftTop()
};
return drawPolygon(ctx, 4, points);
}
else
{
Point2d points[16];
mgRoundRectToBeziers(points, rect, rx, ry);
S2D(xf(), modelUnit).TransformPoints(16, points);
ret = rawBeginPath();
if (ret)
{
ret = rawMoveTo(points[0].x, points[0].y);
ret = rawBezierTo(&points[1], 3);
ret = rawLineTo(points[4].x, points[4].y);
ret = rawBezierTo(&points[5], 3);
ret = rawLineTo(points[8].x, points[8].y);
ret = rawBezierTo(&points[9], 3);
ret = rawLineTo(points[12].x, points[12].y);
ret = rawBezierTo(&points[13], 3);
ret = rawClosePath();
ret = rawEndPath(ctx, true);
}
}
return ret;
}示例14: Box2d
void MgCmdManagerImpl::getBoundingBox(Box2d& box, const MgMotion* sender)
{
MgCommand* cmd = sender->cmds()->getCommand();
Box2d selbox;
if (cmd && strcmp(cmd->getName(), MgCmdSelect::Name()) == 0) {
MgCmdSelect* sel = (MgCmdSelect*)cmd;
selbox = sel->getBoundingBox(sender);
}
box = selbox.isEmpty() ? Box2d(sender->pointM, 0, 0) : selbox;
box *= sender->view->xform()->modelToDisplay();
box.normalize();
}示例15: beziersBox
void mgnear::beziersBox(
Box2d& box, int count, const Point2d* points, bool closed)
{
box.empty();
for (int i = 0; i + 3 < count; i += 3) {
box.unionWith(computeCubicBox(points + i));
}
if (closed && count > 3) {
box.unionWith(computeCubicBox(points[count - 1],
points[count - 1] * 2 - points[count - 2].asVector(),
points[0] * 2 - points[1].asVector(), points[0]));
}
}