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using System;
using UnityEngine;
namespace Rigging.Debugging
{
public class GLScope : IDisposable
{
bool bScopeBefore;
public GLScope(bool enabled)
{
bScopeBefore = GLHandle.bScopeEnabled;
GLHandle.EnterScope(enabled);
}
public void Dispose()
{
GLHandle.EndScope(bScopeBefore);
}
}
[DefaultExecutionOrder(-100)]
public class GLHandle : MonoBehaviour
{
private static GLHandle instance;
private static event System.Action onGL;
private static event System.Action onGLFixedUpdate;
private static Material lineMaterial;
public static bool bScopeEnabled;
static GLHandle()
{
bScopeEnabled = true;
}
static void CreateLineMaterial()
{
if (!lineMaterial)
{
// Unity has a built-in shader that is useful for drawing
// simple colored things.
Shader shader = Shader.Find("Hidden/Internal-Colored");
lineMaterial = new Material(shader);
lineMaterial.hideFlags = HideFlags.HideAndDontSave;
// Turn on alpha blending
lineMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
lineMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
// Turn backface culling off
lineMaterial.SetInt("_Cull", (int)UnityEngine.Rendering.CullMode.Off);
// Turn off depth writes
lineMaterial.SetInt("_ZWrite", 0);
lineMaterial.SetInt("_ZTest", 0);
}
}
private void FixedUpdate()
{
onGLFixedUpdate = null;
}
public void OnRenderObject()
{
CreateLineMaterial();
// Apply the line material
lineMaterial.SetPass(0);
onGL?.Invoke();
onGL = null;
onGLFixedUpdate?.Invoke();
}
static void Check()
{
if(instance == null)
{
GameObject gl = new GameObject();
gl.name = "GLHandle";
instance = gl.AddComponent<GLHandle>();
}
}
public static void EnterScope(bool enabled = true)
{
bScopeEnabled = enabled;
}
public static void EndScope(bool enabled = true)
{
bScopeEnabled = true;
}
public static void DrawSphere(Vector3 pos, float radius, int verticalSegments = 1, int radialSegments = 2)
{
Check();
if (!bScopeEnabled) return;
if(Time.inFixedTimeStep)
{
onGLFixedUpdate += () =>
{
Draw.Sphere(pos, radius, verticalSegments, radialSegments);
};
}
else
{
onGL += () =>
{
Draw.Sphere(pos, radius, verticalSegments, radialSegments);
};
}
}
public static void DrawLine(Vector3 p1, Vector3 p2)
{
Check();
if (!bScopeEnabled) return;
if (Time.inFixedTimeStep)
{
onGLFixedUpdate += () =>
{
Draw.Line3D(p1, p2);
};
}
else
{
onGL += () =>
{
Draw.Line3D(p1, p2);
};
}
}
}
}
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