// Update position, check collisions, etc. and draw if particle still lives.
// Return false if particle dies/timeouts in this tick.
public bool Draw(MyBillboard billboard)
{
// Check for timeout
int elapsedMiliseconds = MyMinerGame.TotalGamePlayTimeInMilliseconds - m_timeStarted;
if (elapsedMiliseconds >= m_lifespanInMiliseconds)
{
return(false);
}
// This time is scaled according to planned lifespan of the particle
float normalizedTimeElapsed = (float)elapsedMiliseconds / (float)m_lifespanInMiliseconds;
MyQuad quad = new MyQuad();
Vector3 actualPosition;
if (m_type == MyParticleType.LINE_PARTICLE)
{
actualPosition = m_startPosition;
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT)
{
Matrix worldMatrix = m_physObject.WorldMatrix;
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref worldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT_COCKPIT_GLASS)
{
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref ((MySmallShip)m_physObject).PlayerHeadForCockpitInteriorWorldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.POINT_PARTICLE)
{
actualPosition = m_startPosition + m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.POINT_PARTICLE_RELATIVE_TO_PHYS_OBJECT)
{
Matrix worldMatrix = m_physObject.WorldMatrix;
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref worldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else
{
throw new MyMwcExceptionApplicationShouldNotGetHere();
}
// Distance for sorting
Vector3 campos = MyCamera.Position;
Vector3.DistanceSquared(ref campos, ref actualPosition, out billboard.DistanceSquared);
// If distance to camera is really small don't draw it.
if (billboard.DistanceSquared <= MyMwcMathConstants.EPSILON)
{
return(true);
}
if ((m_type == MyParticleType.LINE_PARTICLE) ||
(m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT) ||
(m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT_COCKPIT_GLASS))
{
float actualLength = MathHelper.Lerp(m_lineSpecific_startLength, m_lineSpecific_endLength, normalizedTimeElapsed);
MyPolyLine polyLine;
polyLine.LineDirectionNormalized = m_lineSpecific_directionNormalized;
polyLine.Point0 = actualPosition;
polyLine.Point1 = actualPosition + polyLine.LineDirectionNormalized * actualLength;
polyLine.Thickness = m_lineSpecific_thickness;
// Billboard vertexes
MyUtils.GetPolyLineQuad(out quad, ref polyLine);
}
else if ((m_type == MyParticleType.POINT_PARTICLE) || (m_type == MyParticleType.POINT_PARTICLE_RELATIVE_TO_PHYS_OBJECT))
{
// Billboard vertexes
float actualRadius = MathHelper.Lerp(m_pointSpecific_startRadius, m_pointSpecific_endRadius, normalizedTimeElapsed);
float angle = m_pointSpecific_startAngle + normalizedTimeElapsed * m_pointSpecific_rotationSpeed;
MyUtils.GetBillboardQuadRotated(billboard, ref actualPosition, actualRadius, angle);
}
else
{
throw new MyMwcExceptionApplicationShouldNotGetHere();
}
// Color and alpha depend on time
Vector4 color;
color.X = MathHelper.Lerp(m_startColor.X, m_endColor.X, normalizedTimeElapsed);
color.Y = MathHelper.Lerp(m_startColor.Y, m_endColor.Y, normalizedTimeElapsed);
color.Z = MathHelper.Lerp(m_startColor.Z, m_endColor.Z, normalizedTimeElapsed);
color.W = MathHelper.Lerp(m_startColor.W, m_endColor.W, normalizedTimeElapsed);
//billboard.Color.W *= 1.0f - normalizedTimeElapsed;
//billboard.Color.W *= 1 - (float)Math.Pow(normalizedTimeElapsed, 2);
//billboard.Color.W *= normalizedTimeElapsed * (1 - normalizedTimeElapsed) * (1 - normalizedTimeElapsed) * 6.7f;
billboard.Start(ref quad, m_materialEnum, ref color, ref m_startPosition);
// Yes, draw this particle
return(true);
}
// Update position, check collisions, etc. and draw if particle still lives.
// Return false if particle dies/timeouts in this tick.
public bool Draw(MyBillboard billboard)
{
// Check for timeout
int elapsedMiliseconds = MyMinerGame.TotalGamePlayTimeInMilliseconds - m_timeStarted;
if (elapsedMiliseconds >= m_lifespanInMiliseconds) return false;
// This time is scaled according to planned lifespan of the particle
float normalizedTimeElapsed = (float)elapsedMiliseconds / (float)m_lifespanInMiliseconds;
MyQuad quad = new MyQuad();
Vector3 actualPosition;
if (m_type == MyParticleType.LINE_PARTICLE)
{
actualPosition = m_startPosition;
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT)
{
Matrix worldMatrix = m_physObject.WorldMatrix;
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref worldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT_COCKPIT_GLASS)
{
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref ((MySmallShip)m_physObject).PlayerHeadForCockpitInteriorWorldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.POINT_PARTICLE)
{
actualPosition = m_startPosition + m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else if (m_type == MyParticleType.POINT_PARTICLE_RELATIVE_TO_PHYS_OBJECT)
{
Matrix worldMatrix = m_physObject.WorldMatrix;
actualPosition = MyUtils.GetTransform(ref m_startPosition, ref worldMatrix);
actualPosition += m_velocity * ((float)elapsedMiliseconds / 1000.0f);
}
else
{
throw new MyMwcExceptionApplicationShouldNotGetHere();
}
// Distance for sorting
Vector3 campos = MyCamera.Position;
Vector3.DistanceSquared(ref campos, ref actualPosition, out billboard.DistanceSquared);
// If distance to camera is really small don't draw it.
if (billboard.DistanceSquared <= MyMwcMathConstants.EPSILON)
{
return true;
}
if ((m_type == MyParticleType.LINE_PARTICLE) ||
(m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT) ||
(m_type == MyParticleType.LINE_PARTICLE_RELATIVE_TO_PHYS_OBJECT_COCKPIT_GLASS))
{
float actualLength = MathHelper.Lerp(m_lineSpecific_startLength, m_lineSpecific_endLength, normalizedTimeElapsed);
MyPolyLine polyLine;
polyLine.LineDirectionNormalized = m_lineSpecific_directionNormalized;
polyLine.Point0 = actualPosition;
polyLine.Point1 = actualPosition + polyLine.LineDirectionNormalized * actualLength;
polyLine.Thickness = m_lineSpecific_thickness;
// Billboard vertexes
MyUtils.GetPolyLineQuad(out quad, ref polyLine);
}
else if ((m_type == MyParticleType.POINT_PARTICLE) || (m_type == MyParticleType.POINT_PARTICLE_RELATIVE_TO_PHYS_OBJECT))
{
// Billboard vertexes
float actualRadius = MathHelper.Lerp(m_pointSpecific_startRadius, m_pointSpecific_endRadius, normalizedTimeElapsed);
float angle = m_pointSpecific_startAngle + normalizedTimeElapsed * m_pointSpecific_rotationSpeed;
MyUtils.GetBillboardQuadRotated(billboard, ref actualPosition, actualRadius, angle);
}
else
{
throw new MyMwcExceptionApplicationShouldNotGetHere();
}
// Color and alpha depend on time
Vector4 color;
color.X = MathHelper.Lerp(m_startColor.X, m_endColor.X, normalizedTimeElapsed);
color.Y = MathHelper.Lerp(m_startColor.Y, m_endColor.Y, normalizedTimeElapsed);
color.Z = MathHelper.Lerp(m_startColor.Z, m_endColor.Z, normalizedTimeElapsed);
color.W = MathHelper.Lerp(m_startColor.W, m_endColor.W, normalizedTimeElapsed);
//billboard.Color.W *= 1.0f - normalizedTimeElapsed;
//billboard.Color.W *= 1 - (float)Math.Pow(normalizedTimeElapsed, 2);
//billboard.Color.W *= normalizedTimeElapsed * (1 - normalizedTimeElapsed) * (1 - normalizedTimeElapsed) * 6.7f;
billboard.Start(ref quad, m_materialEnum, ref color, ref m_startPosition);
// Yes, draw this particle
return true;
}