Quadratic Bezier curve. More...
#include <polyver.h>
Inheritance diagram for a2dVpathQBCurveSegment:
Collaboration diagram for a2dVpathQBCurveSegment:
Public Member Functions | |
| a2dVpathQBCurveSegment (double x1, double y1, double x2, double y2, a2dPATHSEG type=a2dPATHSEG_QBCURVETO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN) | |
| constructor More... | |
| a2dVpathQBCurveSegment (a2dVpathSegmentPtr prev, double x1, double y1, a2dPATHSEG type=a2dPATHSEG_QBCURVETO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN) | |
| constructor More... | |
| a2dVpathQBCurveSegment (const a2dVpathQBCurveSegment &other) | |
| copy constructor | |
| ~a2dVpathQBCurveSegment () | |
| destructor | |
| virtual a2dVpathSegment * | Clone () |
| create exact copy | |
| virtual double | Length (a2dVpathSegmentPtr prev) |
| calculate length | |
| void | PositionAt (a2dVpathSegmentPtr prev, double t, double &xt, double &yt) |
| calculate position at t, used for length | |
 Public Member Functions inherited from a2dVpathSegment | |
| a2dVpathSegment (double x, double y, a2dPATHSEG type=a2dPATHSEG_LINETO, a2dPATHSEG_END close=a2dPATHSEG_END_OPEN) | |
| constructor More... | |
| a2dVpathSegment (const a2dVpathSegment &other) | |
| constructor | |
| virtual | ~a2dVpathSegment () |
| destructor | |
| a2dPATHSEG | GetType () const |
| easy way to test type of segment | |
| bool | GetBin () const |
| used in processing | |
| void | SetBin (bool bin) |
| used in processing | |
| a2dPATHSEG_END | GetClose () const |
| is this segment the closing a part since the last move | |
| void | SetClose (a2dPATHSEG_END close) |
| set this segment is closing a part since the last move | |
Public Attributes | |
| double | m_x2 |
| control point | |
| double | m_y2 |
| control point | |
| Public Attributes inherited from a2dVpathSegment | |
| double | m_x1 |
| x endpoint of line | |
| double | m_y1 |
| y endpoint of line | |
| bool | m_bin: 1 |
| Marker for walking over the segments. | |
| a2dPATHSEG | m_type: 5 |
| easy way to test type of segment | |
| a2dPATHSEG_END | m_close: 3 |
| is the path closing here or not | |
Detailed Description
Quadratic Bezier curve.
Create a curved segment based on qaudratic Bezier spline let P0 be end point of previous segment let P1 be inbetween point of this segment (m_x2, m_y2) let P2 be end point of this segment (m_x1, m_y1)
Then the formula describing points on the curve are:
For ( 0 <= t <= 1 ) Point(t) = (1-t)^2*P0 + 2*t*(1-t)*P1 + t^2*P2
Constructor & Destructor Documentation
| a2dVpathQBCurveSegment::a2dVpathQBCurveSegment | ( | double | x1, |
| double | y1, | ||
| double | x2, | ||
| double | y2, | ||
| a2dPATHSEG | type = a2dPATHSEG_QBCURVETO, |
||
| a2dPATHSEG_END | close = a2dPATHSEG_END_OPEN |
||
| ) |
constructor
- Parameters
-
x1 endpoint of curve y1 endpoint of curve x2 first control point coming from previous segment in path y2 first control point coming from previous segment in path type draw or move towards point close if true close this path with the last move command/segment
Definition at line 3566 of file polyver.cpp.
| a2dVpathQBCurveSegment::a2dVpathQBCurveSegment | ( | a2dVpathSegmentPtr | prev, |
| double | x1, | ||
| double | y1, | ||
| a2dPATHSEG | type = a2dPATHSEG_QBCURVETO, |
||
| a2dPATHSEG_END | close = a2dPATHSEG_END_OPEN |
||
| ) |
constructor
- Parameters
-
prev previous segment x1 endpoint of curve y1 endpoint of curve type draw or move towards point close if true close this path with the last move command/segment
Definition at line 3578 of file polyver.cpp.
The documentation for this class was generated from the following files: