bool GiGraphics::drawBeziers(const GiContext* ctx, int count,
const Point2d* points, bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || count < 4 || points == NULL)
return false;
GiLock lock (&m_impl->drawRefcnt);
if (count > 0x2000)
count = 0x2000;
count = 1 + (count - 1) / 3 * 3;
bool ret = false;
vector<Point2d> pxpoints;
vector<Point2d> pointBuf;
int i, j, n, si, ei;
Point2d * pxs;
Matrix2d matD(S2D(xf(), modelUnit));
const Box2d extent (count, points); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) // 全部在显示区域内
{
pxpoints.resize(count);
pxs = &pxpoints.front();
for (i = 0; i < count; i++)
pxs[i] = points[i] * matD;
ret = rawBeziers(ctx, pxs, count);
}
else
{
pointBuf.resize(count);
for (i = 0; i < count; i++) // 转换到像素坐标
pointBuf[i] = points[i] * matD;
Point2d* pts = &pointBuf.front();
si = ei = 0;
for (i = 3; i < count; i += 3)
{
for ( ; i < count
&& m_impl->rectDraw.isIntersect(Box2d(4, &pts[ei])); i += 3)
ei = i;
n = ei - si + 1;
if (n > 1)
{
pxpoints.resize(n);
pxs = &pxpoints.front();
for (j=0; j<n; j++)
pxs[j] = pts[si + j];
ret = rawBeziers(ctx, pxs, n);
}
si = ei = i;
}
}
return ret;
}
bool GiGraphics::drawBeziers(const GiContext* ctx, int count,
const Point2d* points, bool closed, bool modelUnit)
{
if (count < 4 || !points || isStopping())
return false;
if (count > 0x2000)
count = 0x2000;
count = 1 + (count - 1) / 3 * 3;
bool ret = false;
vector<Point2d> pxpoints;
vector<Point2d> pointBuf;
int i, j, n, si, ei;
Point2d * pxs;
Matrix2d matD(S2D(xf(), modelUnit));
const Box2d extent (count, points); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
if (closed) {
pxpoints.resize(count);
pxs = &pxpoints.front();
for (i = 0; i < count; i++)
pxs[i] = points[i] * matD;
ret = rawBeziers(ctx, pxs, count, closed);
}
else if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) { // 全部在显示区域内
pxpoints.resize(count);
pxs = &pxpoints.front();
for (i = 0; i < count; i++)
pxs[i] = points[i] * matD;
ret = rawBeziers(ctx, pxs, count);
} else {
pointBuf.resize(count);
for (i = 0; i < count; i++) // 转换到像素坐标
pointBuf[i] = points[i] * matD;
Point2d* pts = &pointBuf.front();
for (i = 0; i + 3 < count;) {
for (; i + 3 < count && !m_impl->rectDraw.isIntersect(Box2d(4, &pts[i])); i += 3) ;
si = ei = i;
for (; i + 3 < count && m_impl->rectDraw.isIntersect(Box2d(4, &pts[i])); i += 3)
ei = i + 3;
if (ei > si) {
n = ei - si + 1;
pxpoints.resize(n);
pxs = &pxpoints.front();
for (j=0; j<n; j++)
pxs[j] = pts[si + j];
ret = rawBeziers(ctx, pxs, n);
}
}
}
return ret;
}
bool GiGraphics::drawLines(const GiContext* ctx, int count,
const Point2d* points, bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || count < 2 || points == NULL)
return false;
if (count > 0x2000)
count = 0x2000;
GiLock lock (&m_impl->drawRefcnt);
int i;
Point2d pt1, pt2, ptLast;
vector<Point2d> pxpoints;
vector<Point2d> pointBuf;
bool ret = false;
Matrix2d matD(S2D(xf(), modelUnit));
const Box2d extent (count, points); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) // 全部在显示区域内
{
pxpoints.resize(count);
Point2d* pxs = &pxpoints.front();
int n = 0;
for (i = 0; i < count; i++)
{
pt2 = points[i] * matD;
if (i == 0 || fabs(pt1.x - pt2.x) > 2 || fabs(pt1.y - pt2.y) > 2)
{
pt1 = pt2;
pxs[n++] = pt2;
}
}
ret = rawLines(ctx, pxs, n);
}
else // 部分在显示区域内
{
pointBuf.resize(count);
for (i = 0; i < count; i++) // 转换到像素坐标
pointBuf[i] = points[i] * matD;
Point2d* pts = &pointBuf.front();
ptLast = pts[0];
PolylineAux aux(this, ctx);
for (i = 0; i < count - 1; i++)
{
ret = DrawEdge(count, i, pts, ptLast, aux, m_impl->rectDraw) || ret;
}
}
return ret;
}
bool GiGraphics::drawPolygon(const GiContext* ctx, int count,
const Point2d* points, bool modelUnit)
{
if (m_impl->drawRefcnt == 0 || count < 2 || points == NULL)
return false;
GiLock lock (&m_impl->drawRefcnt);
if (count > 0x2000)
count = 0x2000;
bool ret = false;
const Box2d extent (count, points); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) // 全部在显示区域内
{
ret = _DrawPolygon(m_impl->canvas, ctx,
count, points, true, true, true, modelUnit);
}
else // 部分在显示区域内
{
PolygonClip clip (m_impl->rectDraw);
if (!clip.clip(count, points, &S2D(xf(), modelUnit))) // 多边形剪裁
return false;
count = clip.getCount();
points = clip.getPoints();
ret = _DrawPolygon(m_impl->canvas, ctx,
count, points, false, true, false, modelUnit);
int ienter = findInvisibleEdge(clip);
if (ienter == count)
{
ret = _DrawPolygon(m_impl->canvas, ctx, count, points,
false, false, true, modelUnit) || ret;
}
else
{
ret = drawPolygonEdge(PolylineAux(this, ctx), count, clip, ienter) || ret;
}
}
return ret;
}
bool GiGraphics::drawPolygon(const GiContext* ctx, int count,
const Point2d* points, bool modelUnit)
{
if (count < 2 || !points || isStopping())
return false;
count = count > 0x2000 ? 0x2000 : count;
ctx = ctx ? ctx : &(m_impl->ctx);
bool ret = false;
const Box2d extent (count, points); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) { // 全部在显示区域内
ret = _drawPolygon(ctx, count, points, true, true, true, modelUnit);
} else { // 部分在显示区域内
PolygonClip clip (m_impl->rectDraw);
if (!clip.clip(count, points, &S2D(xf(), modelUnit))) // 多边形剪裁
return false;
count = clip.getCount();
points = clip.getPoints();
ret = _drawPolygon(ctx, count, points, false, true, false, modelUnit);
int ienter = findInvisibleEdge(clip);
if (ienter == count) {
ret = _drawPolygon(ctx, count, points, false, false, true, modelUnit) || ret;
} else {
ret = drawPolygonEdge(PolylineAux(this, ctx), count, clip, ienter) || ret;
}
}
return ret;
}
bool GiGraphics::drawBeziers(const GiContext* ctx, int count,
const Point2d* knot, const Vector2d* knotvs,
bool closed, bool modelUnit)
{
if (count < 2 || !knot || !knotvs || isStopping())
return false;
if (count > 0x1000)
count = 0x1000;
bool ret = false;
vector<Point2d> pxpoints;
vector<Point2d> pointBuf;
int i, j, n, si, ei;
Point2d * pxs;
Matrix2d matD(S2D(xf(), modelUnit));
const Box2d extent (count, knot); // 模型坐标范围
if (!DRAW_RECT(m_impl, modelUnit).isIntersect(extent)) // 全部在显示区域外
return false;
pointBuf.resize(1 + (count - 1) * 3);
pxs = &pointBuf.front();
if (closed) {
pxs[0] = knot[0] * matD;
for (i = 0, j = 1; i + 1 < count; i++) {
pxs[j++] = (knot[i] + knotvs[i]) * matD;
pxs[j++] = (knot[i+1] - knotvs[i+1]) * matD;
pxs[j++] = knot[i+1] * matD;
}
ret = rawBeziers(ctx, pxs, j, closed);
}
else if (DRAW_MAXR(m_impl, modelUnit).contains(extent)) { // 全部在显示区域内
pxs[0] = knot[0] * matD;
for (i = 0, j = 1; i + 1 < count; i++) {
pxs[j++] = (knot[i] + knotvs[i]) * matD;
pxs[j++] = (knot[i+1] - knotvs[i+1]) * matD;
pxs[j++] = knot[i+1] * matD;
}
ret = rawBeziers(ctx, pxs, j);
} else {
pxs[0] = knot[0] * matD;
for (i = 0, j = 1; i + 1 < count; i++) {
pxs[j++] = (knot[i] + knotvs[i]) * matD;
pxs[j++] = (knot[i+1] - knotvs[i+1]) * matD;
pxs[j++] = knot[i+1] * matD;
}
Point2d* pts = pxs;
count = 1 + (count - 1) * 3;
for (i = 0; i + 3 < count;) {
for (; i + 3 < count && !m_impl->rectDraw.isIntersect(Box2d(4, &pts[i])); i += 3) ;
si = ei = i;
for (; i + 3 < count && m_impl->rectDraw.isIntersect(Box2d(4, &pts[i])); i += 3)
ei = i + 3;
if (ei > si) {
n = ei - si + 1;
pxpoints.resize(n);
pxs = &pxpoints.front();
for (j=0; j<n; j++)
pxs[j] = pts[si + j];
ret = rawBeziers(ctx, pxs, n);
}
}
}
return ret;
}
