void PrimitiveShader_PC::drawBatch(const Mat3 &transform, DrawMode mode, const Vec2 *p, size_t N)
{
prepare(mode);
pushPoints(transform, p, N);
}
void PrimitiveShader_PC::drawBatch(DrawMode mode, const Point *p, size_t N)
{
prepare(mode);
pushPoints(p, N);
}
// N must be x3
inline void pushTriangles(const Vec2 *points, size_t N)
{
pushPoints(points, N);
}
void CatmullRomCurveEvaluator::evaluateCurve(const std::vector<Point>& ptvCtrlPts,
std::vector<Point>& ptvEvaluatedCurvePts,
const float& fAniLength,
const bool& bWrap) const {
ptvEvaluatedCurvePts.clear();
int iCtrlPtCount = ptvCtrlPts.size();
if (iCtrlPtCount < 3) return;
vector<Point> pts;
if (bWrap) {
// first
Point P0(ptvCtrlPts[iCtrlPtCount - 1].x - fAniLength, ptvCtrlPts[iCtrlPtCount - 1].y);
Point P1 = ptvCtrlPts[0];
Point P2 = ptvCtrlPts[1];
Point P3 = ptvCtrlPts[2];
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
// last
pts.clear();
P0 = ptvCtrlPts[iCtrlPtCount - 3];
P1 = ptvCtrlPts[iCtrlPtCount - 2];
P2 = ptvCtrlPts[iCtrlPtCount - 1];
P3.x = ptvCtrlPts[0].x + fAniLength;
P3.y = ptvCtrlPts[0].y;
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
pts.clear();
P0 = ptvCtrlPts[iCtrlPtCount - 2];
P1 = ptvCtrlPts[iCtrlPtCount - 1];
P2.x = ptvCtrlPts[0].x + fAniLength;
P2.y = ptvCtrlPts[0].y;
P3.x = ptvCtrlPts[1].x + fAniLength;
P3.y = ptvCtrlPts[1].y;
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts, fAniLength);
// middle curve
int i;
for (i = 0; i + 3 < iCtrlPtCount; i++) {
pts.clear();
P0 = ptvCtrlPts[i];
P1 = ptvCtrlPts[i + 1];
P2 = ptvCtrlPts[i + 2];
P3 = ptvCtrlPts[i + 3];
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
}
}
else {
// first
Point P0 = ptvCtrlPts[0];
Point P1 = ptvCtrlPts[0];
Point P2 = ptvCtrlPts[1];
Point P3 = ptvCtrlPts[2];
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
// last
pts.clear();
P0 = ptvCtrlPts[iCtrlPtCount - 3];
P1 = ptvCtrlPts[iCtrlPtCount - 2];
P2 = ptvCtrlPts[iCtrlPtCount - 1];
P3 = ptvCtrlPts[iCtrlPtCount - 1];
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
// middle curve
int i;
for (i = 0; i + 3 < iCtrlPtCount; i++) {
pts.clear();
P0 = ptvCtrlPts[i];
P1 = ptvCtrlPts[i + 1];
P2 = ptvCtrlPts[i + 2];
P3 = ptvCtrlPts[i + 3];
convertPoints(pts, P0, P1, P2, P3);
pushPoints(ptvEvaluatedCurvePts, pts);
}
ptvEvaluatedCurvePts.push_back(Point(0, ptvCtrlPts[0].y));
ptvEvaluatedCurvePts.push_back(Point(fAniLength, ptvCtrlPts[iCtrlPtCount - 1].y));
}
}
// add N indices
inline void pushLines(const Vec2 *points, size_t N)
{
pushPoints(points, N);
}