HKeyframeChannelCurve
Fields
| HPoint | m_tangent1 |
| HPoint | m_tangent2 |
| float | m_factor1 |
| float | m_factor2 |
| HPoint * | control_polygon |
| float | ItemType |
| float | c |
| float | b |
| float | m_curvelength |
Functions
Detailed Description
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class
HKeyframeChannelCurve: public HKeyframeChannel The HKeyframeChannelCurve class is used for spline based interpolation of positional values.
Subclassed by HKeyframeChannelFollowPath
Public Functions
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inline
HKeyframeChannelCurve(float x = 0, float y = 0, float z = 0) Constructs a HKeyframeChannelCurve Object.
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inline virtual
~HKeyframeChannelCurve()
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inline virtual HKeyframe *
Clone() This method makes an exact copy of the current HKeyframeChannelCurve and returns a pointer to the newly created HKeyframeChannelCurve object.
Returns: A pointer to the newly created HKeyframeChannelCurve object.
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void
CalculateCurveFactor(HBhvTimeline *timeline, int keyframe) This method is a helper function for CalculateHermiteTangents(). Call this method to precalculate curve factors before calling CalculateHermiteTangents().
Parameters: - timeline – Timeline array necessary to calculate correct curve factors
- keyframe – Current Keyframe
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void
CalculateHermiteTangents(HPoint p0, HPoint p2, HPoint p3, float a = 0.5f) Use this method to precalculate tangents for the hermite spline. This method can be usef as a helper function for interpolation.
Parameters: - p0 – The first point for tangent calculation.
- p2 – The third point for tangent calculation.
- p3 – The fourth Point for tangent calculation.
- a – Constant for hermite spline
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HPoint
InterpolateHermiteSpline(float fraction, HPoint p1, HPoint p2) This method uses the given frame and control points to interpolate a Hermite spline.
Parameters: - fraction – Distance between the first and second control point.
- p1 – The first control point.
- p2 – The second control point.
Returns: The interpolated result.
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void
CalculateCurveLength(HPoint p2) This method calculates the length of this curve between this keyframe and a given point.
Parameters: p2 – The point to calculate the length with.
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void
DrawTangents(HPoint p2) This method creates a visualization of the tangents calculated for this curve by drawing them into the scene.
Parameters: p2 – The second point to calculate tangents from.
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virtual void
Interpolate(HKeyframeChannel const *posarray[], int keyframe, float fraction, int length, HPoint &res) Calculates the interpolation between this keyframe and the next keyframe.
Parameters: - posarray – The array of HKeyframeChannel objects.
- keyframe – They current keyframe number.
- fraction – The fraction from this keyframe to next.
- length – The number of entries in the keyframe array.
- res – Returns the interpolation result.
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virtual void
Serialize(HUtilityXMLTag *xmlgen) Writes XML data to a buffer.
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inline
