// 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) { MyTransparentGeometry.StartParticleProfilingBlock("Distance calculation"); // This time is scaled according to planned lifespan of the particle // Distance for sorting Vector3 campos = MyCamera.Position; Vector3.DistanceSquared(ref campos, ref m_actualPosition, out billboard.DistanceSquared); MyTransparentGeometry.EndParticleProfilingBlock(); // If distance to camera is really small don't draw it. if (billboard.DistanceSquared <= 1) { return(false); } MyTransparentGeometry.StartParticleProfilingBlock("Quad calculation"); MyTransparentGeometry.StartParticleProfilingBlock("actualRadius"); float actualRadius = 1; Radius.GetInterpolatedValue <float>(m_normalizedTime, out actualRadius); MyTransparentGeometry.EndParticleProfilingBlock(); billboard.ContainedBillboards.Clear(); billboard.Near = m_generation.GetEffect().Near; billboard.Lowres = m_generation.GetEffect().LowRes || MyRenderConstants.RenderQualityProfile.LowResParticles; float alpha = 1; if (Type == MyParticleTypeEnum.Point) { MyTransparentGeometry.StartParticleProfilingBlock("GetBillboardQuadRotated"); MyUtils.GetBillboardQuadRotated(billboard, ref m_actualPosition, actualRadius, m_actualAngle); MyTransparentGeometry.EndParticleProfilingBlock(); } else if (Type == MyParticleTypeEnum.Line) { if (MyMwcUtils.IsZero(Velocity.LengthSquared())) { Velocity = MyMwcUtils.GetRandomVector3Normalized(); } MyQuad quad = new MyQuad(); MyPolyLine polyLine = new MyPolyLine(); polyLine.LineDirectionNormalized = MyMwcUtils.Normalize(Velocity); if (m_actualAngle > 0) { polyLine.LineDirectionNormalized = Vector3.TransformNormal(polyLine.LineDirectionNormalized, Matrix.CreateRotationY(MathHelper.ToRadians(m_actualAngle))); } polyLine.Point0 = m_actualPosition; polyLine.Point1.X = m_actualPosition.X + polyLine.LineDirectionNormalized.X * actualRadius; polyLine.Point1.Y = m_actualPosition.Y + polyLine.LineDirectionNormalized.Y * actualRadius; polyLine.Point1.Z = m_actualPosition.Z + polyLine.LineDirectionNormalized.Z * actualRadius; if (m_actualAngle > 0) { //centerize polyLine.Point0.X = polyLine.Point0.X - polyLine.LineDirectionNormalized.X * actualRadius * 0.5f; polyLine.Point0.Y = polyLine.Point0.Y - polyLine.LineDirectionNormalized.Y * actualRadius * 0.5f; polyLine.Point0.Z = polyLine.Point0.Z - polyLine.LineDirectionNormalized.Z * actualRadius * 0.5f; polyLine.Point1.X = polyLine.Point1.X - polyLine.LineDirectionNormalized.X * actualRadius * 0.5f; polyLine.Point1.Y = polyLine.Point1.Y - polyLine.LineDirectionNormalized.Y * actualRadius * 0.5f; polyLine.Point1.Z = polyLine.Point1.Z - polyLine.LineDirectionNormalized.Z * actualRadius * 0.5f; } polyLine.Thickness = Thickness; MyUtils.GetPolyLineQuad(out quad, ref polyLine); if (this.m_generation.AlphaAnisotropic) { float angle = 1 - Math.Abs(Vector3.Dot(MyMwcUtils.Normalize(MyCamera.ForwardVector), polyLine.LineDirectionNormalized)); float alphaCone = (float)Math.Pow(angle, 0.5f); alpha = alphaCone; } billboard.Position0 = quad.Point0; billboard.Position1 = quad.Point1; billboard.Position2 = quad.Point2; billboard.Position3 = quad.Point3; } else if (Type == MyParticleTypeEnum.Trail) { if (Quad.Point0 == Quad.Point2) //not moving particle { return(false); } if (Quad.Point1 == Quad.Point3) //not moving particle was previous one { return(false); } if (Quad.Point0 == Quad.Point3) //not moving particle was previous one { return(false); } billboard.Position0 = Quad.Point0; billboard.Position1 = Quad.Point1; billboard.Position2 = Quad.Point2; billboard.Position3 = Quad.Point3; //if (this.m_generation.AlphaAnisotropic) /* { //Trails are anisotropic by default (nobody wants them to see ugly) * Vector3 lineDir = Vector3.Normalize(Quad.Point1 - Quad.Point0); * float angle = 1 - Math.Abs(Vector3.Dot(MyMwcUtils.Normalize(MyCamera.ForwardVector), lineDir)); * float alphaCone = (float)Math.Pow(angle, 0.3f); * alpha = alphaCone; * }*/ } else { throw new NotSupportedException(Type + " is not supported particle type"); } MyTransparentGeometry.EndParticleProfilingBlock(); MyTransparentGeometry.StartParticleProfilingBlock("Material calculation"); Vector4 color; Color.GetInterpolatedValue <Vector4>(m_normalizedTime, out color); int material1 = (int)MyTransparentMaterialEnum.Test; int material2 = (int)MyTransparentMaterialEnum.Test; float textureBlendRatio = 0; if ((Flags & ParticleFlags.BlendTextures) != 0) { float prevTime, nextTime, difference; Material.GetPreviousValue(m_normalizedTime, out material1, out prevTime); Material.GetNextValue(m_normalizedTime, out material2, out nextTime, out difference); if (prevTime != nextTime) { textureBlendRatio = (m_normalizedTime - prevTime) * difference; } } else { Material.GetInterpolatedValue <int>(m_normalizedTime, out material1); } MyTransparentGeometry.EndParticleProfilingBlock(); //This gets 0.44ms for 2000 particles MyTransparentGeometry.StartParticleProfilingBlock("billboard.Start"); billboard.MaterialEnum = (MyTransparentMaterialEnum)material1; billboard.BlendMaterial = (MyTransparentMaterialEnum)material2; billboard.BlendTextureRatio = textureBlendRatio; billboard.EnableColorize = false; billboard.Color = color * alpha * m_generation.GetEffect().UserColorMultiplier; MyTransparentGeometry.EndParticleProfilingBlock(); return(true); }