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Reduce per-triangle per-frame computation significantly

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This commit is contained in:
Thomas Müller 2017-05-29 18:30:49 +02:00
parent d3f2d480a8
commit db444a61cb
1 changed files with 11 additions and 11 deletions
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22
osu.Game/Graphics/Backgrounds/Triangles.cs
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@ -109,27 +109,27 @@ namespace osu.Game.Graphics.Backgrounds
Invalidate(Invalidation.DrawNode, shallPropagate: false);
addTriangles(false);
if (CreateNewTriangles)
addTriangles(false);
float adjustedAlpha = HideAlphaDiscrepancies ?
// Cubically scale alpha to make it drop off more sharply.
(float)Math.Pow(DrawInfo.Colour.AverageColour.Linear.A, 3) :
1;
float movedDistance = ((float)Time.Elapsed / 950) * Velocity * (50 / DrawHeight) / triangleScale;
for (int i = 0; i < parts.Count; i++)
{
TriangleParticle newParticle = parts[i];
float adjustedAlpha = HideAlphaDiscrepancies ?
// Cubically scale alpha to make it drop off more sharply.
(float)Math.Pow(DrawInfo.Colour.AverageColour.Linear.A, 3) :
1;
newParticle.Position += new Vector2(0, -(parts[i].Scale * (50 / DrawHeight)) / triangleScale * Velocity) * ((float)Time.Elapsed / 950);
// Scale moved distance by the size of the triangle. Smaller triangles should move more slowly.
newParticle.Position.Y += -parts[i].Scale * movedDistance;
newParticle.Colour.A = adjustedAlpha;
parts[i] = newParticle;
if (!CreateNewTriangles)
continue;
float bottomPos = parts[i].Position.Y + triangle_size * parts[i].Scale * 0.866f / DrawHeight;
if (bottomPos < 0)
parts.RemoveAt(i);
}