public static void DrawQuadBezier(CCPoint origin, CCPoint control, CCPoint destination, int segments, CCColor4B color)
{
var vertices = new VertexPositionColor[segments + 1];
float factor = CCDirector.SharedDirector.ContentScaleFactor;
float t = 0.0f;
for (int i = 0; i < segments; i++)
{
float x = CCSplineMath.QuadBezier(origin.X, control.X, destination.X, t);
float y = CCSplineMath.QuadBezier(origin.Y, control.Y, destination.Y, t);
vertices[i] = new VertexPositionColor();
vertices[i].Position = new Vector3(x * factor, y * factor, 0);
vertices[i].Color = new Color(color.R, color.G, color.B, color.A);
t += 1.0f / segments;
}
vertices[segments] = new VertexPositionColor
{
Position = new Vector3(destination.X * factor, destination.Y * factor, 0),
Color = new Color(color.R, color.G, color.B, color.A),
};
BasicEffect basicEffect = CCDrawManager.PrimitiveEffect;
basicEffect.Projection = CCDrawManager.ProjectionMatrix;
basicEffect.View = CCDrawManager.ViewMatrix;
basicEffect.World = CCDrawManager.WorldMatrix;
foreach (EffectPass pass in basicEffect.CurrentTechnique.Passes)
{
pass.Apply();
basicEffect.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, vertices, 0, segments);
}
}
public override void Update(float time)
{
if (m_pTarget != null)
{
float xa = 0;
float xb = m_sConfig.ControlPoint1.X;
float xc = m_sConfig.ControlPoint2.X;
float xd = m_sConfig.EndPosition.X;
float ya = 0;
float yb = m_sConfig.ControlPoint1.Y;
float yc = m_sConfig.ControlPoint2.Y;
float yd = m_sConfig.EndPosition.Y;
float x = CCSplineMath.CubicBezier(xa, xb, xc, xd, time);
float y = CCSplineMath.CubicBezier(ya, yb, yc, yd, time);
CCPoint currentPos = m_pTarget.Position;
CCPoint diff = currentPos - m_previousPosition;
m_startPosition = m_startPosition + diff;
CCPoint newPos = m_startPosition + new CCPoint(x, y);
m_pTarget.Position = newPos;
m_previousPosition = newPos;
}
}
/// <summary>
/// draws a cubic bezier path
/// @since v0.8
/// </summary>
public static void DrawCubicBezier(CCPoint origin, CCPoint control1, CCPoint control2, CCPoint destination, int segments, CCColor4B color)
{
var vertices = new VertexPositionColor[segments + 1];
float t = 0;
for (int i = 0; i < segments; ++i)
{
float x = CCSplineMath.CubicBezier(origin.X, control1.X, control2.X, destination.X, t);
float y = CCSplineMath.CubicBezier(origin.Y, control1.Y, control2.Y, destination.Y, t);
vertices[i] = new VertexPositionColor();
vertices[i].Position = new Vector3(x, y, 0);
vertices[i].Color = new Color(color.R, color.G, color.B, color.A);
t += 1.0f / segments;
}
vertices[segments] = new VertexPositionColor
{
Color = new Color(color.R, color.G, color.B, color.A),
Position = new Vector3(destination.X, destination.Y, 0)
};
BasicEffect basicEffect = CCDrawManager.PrimitiveEffect;
basicEffect.Projection = CCDrawManager.ProjectionMatrix;
basicEffect.View = CCDrawManager.ViewMatrix;
basicEffect.World = CCDrawManager.WorldMatrix;
foreach (EffectPass pass in basicEffect.CurrentTechnique.Passes)
{
pass.Apply();
basicEffect.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, vertices, 0, segments);
}
}
public override void Update(float time)
{
int p;
float lt;
// border
if (time == 1)
{
p = m_pPoints.Count - 1;
lt = 1;
}
else
{
p = (int)(time / m_fDeltaT);
lt = (time - m_fDeltaT * p) / m_fDeltaT;
}
// Interpolate
var c = m_pPoints.Count - 1;
CCPoint pp0 = m_pPoints[Math.Min(c, Math.Max(p - 1, 0))];
CCPoint pp1 = m_pPoints[Math.Min(c, Math.Max(p + 0, 0))];
CCPoint pp2 = m_pPoints[Math.Min(c, Math.Max(p + 1, 0))];
CCPoint pp3 = m_pPoints[Math.Min(c, Math.Max(p + 2, 0))];
CCPoint newPos = CCSplineMath.CCCardinalSplineAt(pp0, pp1, pp2, pp3, m_fTension, lt);
UpdatePosition(newPos);
}
public static void DrawCardinalSpline(List <CCPoint> config, float tension, int segments)
{
var vertices = new VertexPositionColor[segments + 1];
int p;
float lt;
float deltaT = 1.0f / config.Count;
for (int i = 0; i < segments + 1; i++)
{
float dt = (float)i / segments;
// border
if (dt == 1)
{
p = config.Count - 1;
lt = 1;
}
else
{
p = (int)(dt / deltaT);
lt = (dt - deltaT * p) / deltaT;
}
// Interpolate
// Interpolate
int c = config.Count - 1;
CCPoint pp0 = config[Math.Min(c, Math.Max(p - 1, 0))];
CCPoint pp1 = config[Math.Min(c, Math.Max(p + 0, 0))];
CCPoint pp2 = config[Math.Min(c, Math.Max(p + 1, 0))];
CCPoint pp3 = config[Math.Min(c, Math.Max(p + 2, 0))];
CCPoint newPos = CCSplineMath.CCCardinalSplineAt(pp0, pp1, pp2, pp3, tension, lt);
vertices[i].Position.X = newPos.X;
vertices[i].Position.Y = newPos.Y;
vertices[i].Color = Color.White;
}
BasicEffect basicEffect = CCDrawManager.PrimitiveEffect;
basicEffect.Projection = CCDrawManager.ProjectionMatrix;
basicEffect.View = CCDrawManager.ViewMatrix;
basicEffect.World = CCDrawManager.WorldMatrix;
foreach (EffectPass pass in basicEffect.CurrentTechnique.Passes)
{
pass.Apply();
basicEffect.GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, vertices, 0, segments);
}
}
public override void Update(float time)
{
int p;
float lt;
// eg.
// p..p..p..p..p..p..p
// 1..2..3..4..5..6..7
// want p to be 1, 2, 3, 4, 5, 6
if (time == 1)
{
p = m_pPoints.Count - 1;
lt = 1;
}
else
{
p = (int)(time / m_fDeltaT);
lt = (time - m_fDeltaT * p) / m_fDeltaT;
}
// Interpolate
var c = m_pPoints.Count - 1;
CCPoint pp0 = m_pPoints[Math.Min(c, Math.Max(p - 1, 0))];
CCPoint pp1 = m_pPoints[Math.Min(c, Math.Max(p + 0, 0))];
CCPoint pp2 = m_pPoints[Math.Min(c, Math.Max(p + 1, 0))];
CCPoint pp3 = m_pPoints[Math.Min(c, Math.Max(p + 2, 0))];
CCPoint newPos = CCSplineMath.CCCardinalSplineAt(pp0, pp1, pp2, pp3, m_fTension, lt);
// Support for stacked actions
CCNode node = m_pTarget;
CCPoint diff = node.Position - m_previousPosition;
if (diff.X != 0 || diff.Y != 0)
{
m_accumulatedDiff = m_accumulatedDiff + diff;
newPos = newPos + m_accumulatedDiff;
}
UpdatePosition(newPos);
}