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Core: use span<T> to cut down on array copys

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This commit is contained in:
hondacrx
2018-12-24 01:02:49 -05:00
parent 581d0fd1ff
commit 40564a73ce
6 changed files with 32 additions and 24 deletions
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Source/Game/Movement/Spline.cs
+17 -13
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@@ -64,12 +64,14 @@ namespace Game.Movement
}
void EvaluateCatmullRom(int index, float t, out Vector3 result)
{
C_Evaluate(points.Skip(index - 1).ToArray(), t, s_catmullRomCoeffs, out result);
Span<Vector3> span = points;
C_Evaluate(span.Slice(index - 1), t, s_catmullRomCoeffs, out result);
}
void EvaluateBezier3(int index, float t, out Vector3 result)
{
index *= (int)3u;
C_Evaluate(points.Skip(index).ToArray(), t, s_Bezier3Coeffs, out result);
Span<Vector3> span = points;
C_Evaluate(span.Slice(index), t, s_Bezier3Coeffs, out result);
}
#endregion
@@ -85,7 +87,7 @@ namespace Game.Movement
Init_Spline(controls, count, m);
}
public void Init_Spline(Vector3[] controls, int count, EvaluationMode m)
public void Init_Spline(Span<Vector3> controls, int count, EvaluationMode m)
{
m_mode = m;
_cyclic = false;
@@ -120,7 +122,7 @@ namespace Game.Movement
index_lo = 0;
index_hi = cyclic ? count : (count - 1);
}
void InitCatmullRom(Vector3[] controls, int count, bool cyclic, int cyclic_point)
void InitCatmullRom(Span<Vector3> controls, int count, bool cyclic, int cyclic_point)
{
int real_size = count + (cyclic ? (1 + 2) : (1 + 1));
@@ -129,7 +131,7 @@ namespace Game.Movement
int lo_index = 1;
int high_index = lo_index + count - 1;
Array.Copy(controls, 0, points, lo_index, count);
Array.Copy(controls.ToArray(), 0, points, lo_index, count);
// first and last two indexes are space for special 'virtual points'
// these points are required for proper C_Evaluate and C_Evaluate_Derivative methtod work
@@ -152,13 +154,13 @@ namespace Game.Movement
index_lo = lo_index;
index_hi = high_index + (cyclic ? 1 : 0);
}
void InitBezier3(Vector3[] controls, int count, bool cyclic, int cyclic_point)
void InitBezier3(Span<Vector3> controls, int count, bool cyclic, int cyclic_point)
{
int c = (int)(count / 3u * 3u);
int t = (int)(c / 3u);
Array.Resize(ref points, c);
Array.Copy(controls, points, c);
Array.Copy(controls.ToArray(), points, c);
index_lo = 0;
index_hi = t - 1;
@@ -190,12 +192,14 @@ namespace Game.Movement
}
void EvaluateDerivativeCatmullRom(int index, float t, out Vector3 result)
{
C_Evaluate_Derivative(points.Skip(index - 1).ToArray(), t, s_catmullRomCoeffs, out result);
Span<Vector3> span = points;
C_Evaluate_Derivative(span.Slice(index - 1), t, s_catmullRomCoeffs, out result);
}
void EvaluateDerivativeBezier3(int index, float t, out Vector3 result)
{
index *= (int)3u;
C_Evaluate_Derivative(points.Skip(index).ToArray(), t, s_Bezier3Coeffs, out result);
Span<Vector3> span = points;
C_Evaluate_Derivative(span.Slice(index), t, s_Bezier3Coeffs, out result);
}
#endregion
@@ -221,7 +225,7 @@ namespace Game.Movement
float SegLengthCatmullRom(int index)
{
Vector3 nextPos;
var p = points.Skip(index - 1).ToArray();
Span<Vector3> p = points.AsSpan(index - 1);
Vector3 curPos = nextPos = p[1];
int i = 1;
@@ -240,7 +244,7 @@ namespace Game.Movement
index *= (int)3u;
Vector3 nextPos;
var p = points.Skip(index).ToArray();
Span<Vector3> p = points.AsSpan(index);
C_Evaluate(p, 0.0f, s_Bezier3Coeffs, out nextPos);
Vector3 curPos = nextPos;
@@ -297,7 +301,7 @@ namespace Game.Movement
private static readonly Matrix4 s_Bezier3Coeffs = new Matrix4(-1.0f, 3.0f, -3.0f, 1.0f, 3.0f, -6.0f, 3.0f, 0.0f, -3.0f, 3.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f);
void C_Evaluate(Vector3[] vertice, float t, Matrix4 matr, out Vector3 result)
void C_Evaluate(Span<Vector3> vertice, float t, Matrix4 matr, out Vector3 result)
{
Vector4 tvec = new Vector4(t * t * t, t * t, t, 1.0f);
Vector4 weights = (tvec * matr);
@@ -305,7 +309,7 @@ namespace Game.Movement
result = vertice[0] * weights[0] + vertice[1] * weights[1]
+ vertice[2] * weights[2] + vertice[3] * weights[3];
}
void C_Evaluate_Derivative(Vector3[] vertice, float t, Matrix4 matr, out Vector3 result)
void C_Evaluate_Derivative(Span<Vector3> vertice, float t, Matrix4 matr, out Vector3 result)
{
Vector4 tvec = new Vector4(3.0f * t * t, 2.0f * t, 1.0f, 0.0f);
Vector4 weights = (tvec * matr);