98 lines
2.8 KiB
C#
98 lines
2.8 KiB
C#
// -----------------------------------------------------------------------------
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// file="GeometryOperation"
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// Project: StgSharp
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// Copyright (c) Nitload.
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// SPDX-License-Identifier: MIT
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// -----------------------------------------------------------------------------
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using StgSharp.Mathematics.Graphics;
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using StgSharp.Timing;
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using System;
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using System.Runtime.InteropServices;
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namespace StgSharp.Geometries
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{
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[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
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public delegate Vec3 GeometryMotionDelegate(
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TimeSpanProvider timeSource,
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out float rotation
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);
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public class GeometryMotion
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{
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private bool isIncrementMode;
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private bool sourceIsStatic;
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private GeometryMotionDelegate movement;
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private IntPtr handle;
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private TimeSpanProvider time;
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public unsafe GeometryMotion(
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bool isIncreament,
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TimeSpanProvider timeSource,
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GeometryMotionDelegate motionDelegate
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)
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{
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isIncrementMode = isIncreament;
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time = timeSource;
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if (motionDelegate == null)
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{
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handle = (IntPtr)(delegate*<TimeSpanProvider, out float, Vec3>)&defaultMotion;
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movement = defaultMotion;
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} else if (motionDelegate.Method.IsStatic)
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{
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sourceIsStatic = true;
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handle = Marshal.GetFunctionPointerForDelegate(motionDelegate);
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movement = motionDelegate;
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} else
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{
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movement = motionDelegate;
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}
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// sourceIsStatic = false;
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}
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public bool IsIncrement => isIncrementMode;
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public static GeometryMotion DefaultMotion => new GeometryMotion(true, null, null);
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public unsafe void RunMotion(
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ref Vec3 coord,
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ref float rotation
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)
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{
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float rot;
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Vec3 vec;
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if (sourceIsStatic)
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{
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vec = ((delegate* unmanaged[Cdecl]<TimeSpanProvider, out float, Vec3>)handle)(
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time, out rot);
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} else
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{
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vec = movement(time, out rot);
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}
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if (isIncrementMode)
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{
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coord += vec;
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rotation += rot;
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} else
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{
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coord = vec;
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rotation = rot;
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}
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}
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private static Vec3 defaultMotion(
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TimeSpanProvider provider,
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out float rotation
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)
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{
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rotation = 0;
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return Vec3.Zero;
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}
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}//------------------------------- End of Class -------------------------------
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}
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