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Clean up GLUtils
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Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>
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@lamont-granquist
lamont-granquist committed Oct 30, 2023
1 parent 4bff466 commit 4bcd32b
Showing 1 changed file with 51 additions and 54 deletions.
105 changes: 51 additions & 54 deletions MechJeb2/GLUtils.cs
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Expand Up @@ -6,16 +6,10 @@ namespace MuMech
{
public static class GLUtils
{
private static Material _material;
private static Material _materialInternal;

private static Material material
{
get
{
if (_material == null) _material = new Material(Shader.Find("Legacy Shaders/Particles/Additive"));
return _material;
}
}
private static Material _material =>
_materialInternal ?? (_materialInternal = new Material(Shader.Find("Legacy Shaders/Particles/Additive")));

public static void DrawMapViewGroundMarker(CelestialBody body, double latitude, double longitude, Color c, double rotation = 0,
double radius = 0) =>
Expand Down Expand Up @@ -67,10 +61,10 @@ private static Material material
, c, map);
}

public static void GLTriangle(Vector3d worldVertices1, Vector3d worldVertices2, Vector3d worldVertices3, Color c, bool map)
private static void GLTriangle(Vector3d worldVertices1, Vector3d worldVertices2, Vector3d worldVertices3, Color c, bool map)
{
GL.PushMatrix();
material.SetPass(0);
_material.SetPass(0);
GL.LoadOrtho();
GL.Begin(GL.TRIANGLES);
GL.Color(c);
Expand All @@ -81,7 +75,7 @@ public static void GLTriangle(Vector3d worldVertices1, Vector3d worldVertices2,
GL.PopMatrix();
}

public static void GLVertex(Vector3d worldPosition, bool map = false)
private static void GLVertex(Vector3d worldPosition, bool map = false)
{
Vector3 screenPoint =
map
Expand All @@ -90,7 +84,7 @@ public static void GLVertex(Vector3d worldPosition, bool map = false)
GL.Vertex3(screenPoint.x, screenPoint.y, 0);
}

public static void GLPixelLine(Vector3d worldPosition1, Vector3d worldPosition2, bool map)
private static void GLPixelLine(Vector3d worldPosition1, Vector3d worldPosition2, bool map)
{
Vector3 screenPoint1, screenPoint2;
if (map)
Expand All @@ -113,25 +107,25 @@ public static void GLPixelLine(Vector3d worldPosition1, Vector3d worldPosition2,

//Tests if byBody occludes worldPosition, from the perspective of the planetarium camera
// https://cesiumjs.org/2013/04/25/Horizon-culling/
public static bool IsOccluded(Vector3d worldPosition, CelestialBody byBody, Vector3d camPos)
private static bool IsOccluded(Vector3d worldPosition, CelestialBody byBody, Vector3d camPos)
{
Vector3d VC = (byBody.position - camPos) / (byBody.Radius - 100);
Vector3d VT = (worldPosition - camPos) / (byBody.Radius - 100);
Vector3d vc = (byBody.position - camPos) / (byBody.Radius - 100);
Vector3d vt = (worldPosition - camPos) / (byBody.Radius - 100);

double VT_VC = Vector3d.Dot(VT, VC);
double vtVc = Vector3d.Dot(vt, vc);

// In front of the horizon plane
if (VT_VC < VC.sqrMagnitude - 1) return false;
if (vtVc < vc.sqrMagnitude - 1) return false;

return VT_VC * VT_VC / VT.sqrMagnitude > VC.sqrMagnitude - 1;
return vtVc * vtVc / vt.sqrMagnitude > vc.sqrMagnitude - 1;
}

//If dashed = false, draws 0-1-2-3-4-5...
//If dashed = true, draws 0-1 2-3 4-5...
public static void DrawPath(CelestialBody mainBody, List<Vector3d> points, Color c, bool map, bool dashed = false)
{
GL.PushMatrix();
material.SetPass(0);
_material.SetPass(0);
GL.LoadPixelMatrix();
GL.Begin(GL.LINES);
GL.Color(c);
Expand All @@ -157,59 +151,62 @@ public static void DrawBoundingBox(CelestialBody mainBody, Vessel vessel, MechJe
{
//Vector3d origin = vessel.GetWorldPos3D() - vessel.GetTransform().rotation * box.center ;
//Vector3d origin = vessel.GetTransform().TransformPoint(box.center);
Vector3d origin = vessel.transform.TransformPoint(box.center);
Transform transform;
Vector3d origin = (transform = vessel.transform).TransformPoint(box.center);

Quaternion rotation = transform.rotation;

Vector3d A1 = origin + vessel.transform.rotation * new Vector3d(+box.size.x, +box.size.y, +box.size.z);
Vector3d A2 = origin + vessel.transform.rotation * new Vector3d(+box.size.x, -box.size.y, +box.size.z);
Vector3d A3 = origin + vessel.transform.rotation * new Vector3d(-box.size.x, -box.size.y, +box.size.z);
Vector3d A4 = origin + vessel.transform.rotation * new Vector3d(-box.size.x, +box.size.y, +box.size.z);
Vector3d a1 = origin + rotation * new Vector3d(+box.size.x, +box.size.y, +box.size.z);
Vector3d a2 = origin + rotation * new Vector3d(+box.size.x, -box.size.y, +box.size.z);
Vector3d a3 = origin + rotation * new Vector3d(-box.size.x, -box.size.y, +box.size.z);
Vector3d a4 = origin + rotation * new Vector3d(-box.size.x, +box.size.y, +box.size.z);

Vector3d B1 = origin + vessel.transform.rotation * new Vector3d(+box.size.x, +box.size.y, -box.size.z);
Vector3d B2 = origin + vessel.transform.rotation * new Vector3d(+box.size.x, -box.size.y, -box.size.z);
Vector3d B3 = origin + vessel.transform.rotation * new Vector3d(-box.size.x, -box.size.y, -box.size.z);
Vector3d B4 = origin + vessel.transform.rotation * new Vector3d(-box.size.x, +box.size.y, -box.size.z);
Vector3d b1 = origin + rotation * new Vector3d(+box.size.x, +box.size.y, -box.size.z);
Vector3d b2 = origin + rotation * new Vector3d(+box.size.x, -box.size.y, -box.size.z);
Vector3d b3 = origin + rotation * new Vector3d(-box.size.x, -box.size.y, -box.size.z);
Vector3d b4 = origin + rotation * new Vector3d(-box.size.x, +box.size.y, -box.size.z);

GL.PushMatrix();
material.SetPass(0);
_material.SetPass(0);
GL.LoadOrtho();
GL.Begin(GL.LINES);
GL.Color(c);

GLVertex(A1);
GLVertex(A2);
GLVertex(a1);
GLVertex(a2);

GLVertex(A2);
GLVertex(A3);
GLVertex(a2);
GLVertex(a3);

GLVertex(A3);
GLVertex(A4);
GLVertex(a3);
GLVertex(a4);

GLVertex(A4);
GLVertex(A1);
GLVertex(a4);
GLVertex(a1);

GLVertex(B1);
GLVertex(B2);
GLVertex(b1);
GLVertex(b2);

GLVertex(B2);
GLVertex(B3);
GLVertex(b2);
GLVertex(b3);

GLVertex(B3);
GLVertex(B4);
GLVertex(b3);
GLVertex(b4);

GLVertex(B4);
GLVertex(B1);
GLVertex(b4);
GLVertex(b1);

GLVertex(A1);
GLVertex(B1);
GLVertex(a1);
GLVertex(b1);

GLVertex(A2);
GLVertex(B2);
GLVertex(a2);
GLVertex(b2);

GLVertex(A3);
GLVertex(B3);
GLVertex(a3);
GLVertex(b3);

GLVertex(A4);
GLVertex(B4);
GLVertex(a4);
GLVertex(b4);

GL.End();
GL.PopMatrix();
Expand Down

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