public Emitter(IModifier[] modifiers)
{
_modifiers = modifiers;
for (var x = 0; x < Program.ParticleCount; x++)
{
Particles.GetFloatValues("TimeAlive")[x] = 0;
Particles.GetFloatValues("RotationInRadians")[x] = 1;
Particles.GetVector2Values("Position")[x] = new Vector2(100, 100);
Particles.GetVector2Values("ReferencePosition")[x] = new Vector2(100, 100);
Particles.GetFloatValues("RotationalVelocityInRadians")[x] = 1f;
Particles.GetFloatValues("CurrentRed")[x] = 255;
Particles.GetFloatValues("CurrentGreen")[x] = 255;
Particles.GetFloatValues("CurrentBlue")[x] = 255;
Particles.GetFloatValues("CurrentAlpha")[x] = 255;
Particles.GetVector2Values("Size")[x] = Vector2.Zero;
Particles.GetVector2Values("InitialSize")[x] = new Vector2(32, 32);
Particles.GetVector2Values("Velocity")[x] = new Vector2(100, 100);
Particles.GetByteValues("TextureSectionIndex")[x] = 0;
Particles.GetByteValues("InitialAlpha")[x] = 255;
Particles.GetByteValues("InitialBlue")[x] = 255;
Particles.GetByteValues("InitialGreen")[x] = 255;
Particles.GetByteValues("InitialRed")[x] = 255;
Particles.GetFloatValues("Altitude")[x] = 0;
Particles.GetFloatValues("AltitudeVelocity")[x] = 0;
Particles.GetIntValues("AltitudeBounceCount")[x] = 0;
}
}
public void Modify(float timeSinceLastFrame, ParticleCollection particles)
{
var velocity = particles.GetVector2Values("Velocity");
var position = particles.GetVector2Values("Position");
var referencePosition = particles.GetVector2Values("ReferencePosition");
var altitude = particles.GetFloatValues("Altitude");
for (var x = 0; x < Program.ParticleCount; x++)
{
referencePosition[x] += velocity[x] * timeSinceLastFrame;
position[x].X = referencePosition[x].X;
position[x].Y = referencePosition[x].Y + altitude[x];
}
}
public void Modify(float timeSinceLastFrame, ParticleCollection particles)
{
var initialSize = particles.GetVector2Values("InitialSize");
var size = particles.GetVector2Values("Size");
for (var x = 0; x < Program.ParticleCount; x++)
{
var width = (((initialSize[x].X - Emitter.EndValue) / Emitter.MaxParticleLifeTime) *
timeSinceLastFrame);
var height = (((initialSize[x].Y - Emitter.EndValue) / Emitter.MaxParticleLifeTime) *
timeSinceLastFrame);
size[x].X -= width;
size[x].Y -= height;
}
}
public void Modify(float timeSinceLastFrame, ParticleCollection particles)
{
var velocity = particles.GetVector2Values("Velocity");
for (var x = 0; x < Program.ParticleCount; x++)
{
velocity[x] -= Emitter.Drag * velocity[x] * timeSinceLastFrame;
}
}
public void Modify(float timeSinceLastFrame, ParticleCollection particles)
{
var size = particles.GetVector2Values("Size");
for (var x = 0; x < Program.ParticleCount; x++)
{
size[x] += timeSinceLastFrame * new Vector2(Emitter.SizeChange, Emitter.SizeChange);
}
}
public void Modify(float timeSinceLastFrame, ParticleCollection particles)
{
var velocity = particles.GetVector2Values("Velocity");
var rotationInRadians = particles.GetFloatValues("RotationInRadians");
for (var x = 0; x < Program.ParticleCount; x++)
{
if (velocity[x] != Vector2.Zero)
{
rotationInRadians[x] =
(float)Math.Atan2(velocity[x].Y, velocity[x].X);
}
}
}