public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var radiusSq = Radius * Radius; while (iterator.HasNext) { var particle = iterator.Next(); var localPos = particle->Position - particle->TriggerPos; var distSq = localPos.LengthSquared(); var normal = localPos.ToAxis().ToVector2(); if (Inside) { if (distSq < radiusSq) continue; SetReflected(distSq, particle, normal); } else { if (distSq > radiusSq) continue; SetReflected(distSq, particle, -normal); } } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var velocityThreshold2 = VelocityThreshold * VelocityThreshold; while (iterator.HasNext) { var particle = iterator.Next(); var velocity2 = particle->Velocity.X * particle->Velocity.X + particle->Velocity.Y * particle->Velocity.Y; var deltaColor = VelocityColor - StationaryColor; if (velocity2 >= velocityThreshold2) { VelocityColor.CopyTo(out particle->Color); } else { var t = (float)Math.Sqrt(velocity2) / VelocityThreshold; particle->Color = new HslColor( deltaColor.H * t + StationaryColor.H, deltaColor.S * t + StationaryColor.S, deltaColor.L * t + StationaryColor.L); } } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { while (iterator.HasNext) { var particle = iterator.Next(); var left = particle->TriggerPos.X + Width * -0.5f; var right = particle->TriggerPos.X + Width * 0.5f; var top = particle->TriggerPos.Y + Height * -0.5f; var bottom = particle->TriggerPos.Y + Height * 0.5f; var xPos = particle->Position.X; var yPos = particle->Position.Y; if ((int)particle->Position.X < left) { xPos = particle->Position.X + Width; } else if ((int)particle->Position.X > right) { xPos = particle->Position.X - Width; } if ((int)particle->Position.Y < top) { yPos = particle->Position.Y + Height; } else if ((int)particle->Position.Y > bottom) { yPos = particle->Position.Y - Height; } particle->Position = new Vector2(xPos, yPos); } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { while (iterator.HasNext) { var particle = iterator.Next(); particle->Opacity = 1.0f - particle->Age; } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var delta = FinalScale - InitialScale; while (iterator.HasNext) { var particle = iterator.Next(); particle->Scale = delta * particle->Age + InitialScale; } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var rotationRateDelta = RotationRate * elapsedSeconds; while (iterator.HasNext) { var particle = iterator.Next(); particle->Rotation += rotationRateDelta; } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { while (iterator.HasNext) { var particle = iterator.Next(); var drag = -DragCoefficient * Density * particle->Mass * elapsedSeconds; particle->Velocity = new Vector2( particle->Velocity.X + particle->Velocity.X * drag, particle->Velocity.Y + particle->Velocity.Y * drag); } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var vector = Direction * (Strength * elapsedSeconds); while (iterator.HasNext) { var particle = iterator.Next(); particle->Velocity = new Vector2( particle->Velocity.X + vector.X * particle->Mass, particle->Velocity.Y + vector.Y * particle->Mass); } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var delta = FinalHue - InitialHue; while (iterator.HasNext) { var particle = iterator.Next(); particle->Color = new HslColor( delta * particle->Age + InitialHue, particle->Color.S, particle->Color.L); } }
public void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { while (iterator.HasNext) { var particle = iterator.Next(); var diff = Position + particle->TriggerPos - particle->Position; var distance2 = diff.LengthSquared(); var speedGain = _gravConst * Mass / distance2 * elapsedSeconds; // normalize distances and multiply by speedGain particle->Velocity += diff.ToAxis() * speedGain; } }
public unsafe void Update(float elapsedseconds, ParticleBuffer.ParticleIterator iterator) { var delta = new HslColor(FinalColor.H - InitialColor.H, FinalColor.S - InitialColor.S, FinalColor.L - InitialColor.L); while (iterator.HasNext) { var particle = iterator.Next(); particle->Color = new HslColor( InitialColor.H + delta.H * particle->Age, InitialColor.S + delta.S * particle->Age, InitialColor.L + delta.L * particle->Age); } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { while (iterator.HasNext) { var particle = iterator.Next(); var left = particle->TriggerPos.X + Width * -0.5f; var right = particle->TriggerPos.X + Width * 0.5f; var top = particle->TriggerPos.Y + Height * -0.5f; var bottom = particle->TriggerPos.Y + Height * 0.5f; var xPos = particle->Position.X; var xVel = particle->Velocity.X; var yPos = particle->Position.Y; var yVel = particle->Velocity.Y; if ((int)particle->Position.X < left) { xPos = left + (left - xPos); xVel = -xVel * RestitutionCoefficient; } else if (particle->Position.X > right) { xPos = right - (xPos - right); xVel = -xVel * RestitutionCoefficient; } if (particle->Position.Y < top) { yPos = top + (top - yPos); yVel = -yVel * RestitutionCoefficient; } else if ((int)particle->Position.Y > bottom) { yPos = bottom - (yPos - bottom); yVel = -yVel * RestitutionCoefficient; } particle->Position = new Vector2(xPos, yPos); particle->Velocity = new Vector2(xVel, yVel); } }
public unsafe void Update(float elapsedSeconds, ParticleBuffer.ParticleIterator iterator) { var velocityThreshold2 = VelocityThreshold * VelocityThreshold; while (iterator.HasNext) { var particle = iterator.Next(); var velocity2 = particle->Velocity.LengthSquared(); float h; if (velocity2 >= velocityThreshold2) { h = VelocityHue; } else { var t = (float)Math.Sqrt(velocity2) / VelocityThreshold; h = MathHelper.Lerp(StationaryHue, VelocityHue, t); } particle->Color = new HslColor(h, particle->Color.S, particle->Color.L); } }