void generate_grid_lines(LineSet lines, Vector3f axis1, Vector3f axis2, int nExtentCount1, int nExtentCount2, float stepSize)
{
Vector2f minPos = stepSize * new Vector2f(-nExtentCount1, -nExtentCount2);
Vector2f maxPos = stepSize * new Vector2f(nExtentCount1, nExtentCount2);
int n1 = 2 * nExtentCount1, n2 = 2 * nExtentCount2;
int start1 = (IncludeEnds) ? 0 : 1, end1 = (IncludeEnds) ? n1 : n1 - 1;
for (int i1 = start1; i1 <= end1; i1++)
{
float t = (float)i1 / (float)n1;
float tx = MathUtil.Lerp(minPos.x, maxPos.x, t);
Vector3f p0 = tx * axis1 + minPos.y * axis2;
Vector3f p1 = tx * axis1 + maxPos.y * axis2;
lines.Segments.Add(new Segment3d(p0, p1));
}
int start2 = (IncludeEnds) ? 0 : 1, end2 = (IncludeEnds) ? n2 : n2 - 1;
for (int i2 = start2; i2 <= end2; i2++)
{
float t = (float)i2 / (float)n2;
float ty = MathUtil.Lerp(minPos.y, maxPos.y, t);
Vector3f p0 = minPos.x * axis1 + ty * axis2;
Vector3f p1 = maxPos.x * axis1 + ty * axis2;
lines.Segments.Add(new Segment3d(p0, p1));
}
}
void enable_circle_indicator(bool enable)
{
if (enable == false && circle_indicator == null)
{
return;
}
if (enable && circle_indicator == null)
{
LineSet lines = new LineSet();
lines.UseFixedNormal = true;
lines.FixedNormal = Vector3f.AxisY;
DCurve3 curve = new DCurve3(Polygon2d.MakeCircle(gizmoInitialRadius, 64), 0, 2);
lines.Curves.Add(curve);
lines.Width = 1.0f;
lines.WidthType = LineWidthType.Pixel;
lines.Segments.Add(
new Segment3d(Vector3d.Zero, gizmoInitialRadius * diagonals[nRotationAxis]));
lines.Color = Colorf.DimGrey;
circle_indicator = new fLineSetGameObject(new GameObject(), lines, "circle");
circle_indicator.SetLayer(FPlatform.WidgetOverlayLayer, true);
circle_indicator.SetLocalRotation(Quaternionf.FromTo(Vector3f.AxisY, Frame3f.Identity.GetAxis(nRotationAxis)));
RootGameObject.AddChild(circle_indicator, false);
}
circle_indicator.SetVisible(enable);
}
void draw_lines(LineSet lines, Vector3f cameraPos)
{
GL.Begin(GL.LINES);
GL.Color(lines.Color);
int NS = lines.Segments.Count;
for (int k = 0; k < NS; ++k)
{
Segment3d seg = lines.Segments[k];
GL.Vertex((Vector3)seg.P0);
GL.Vertex((Vector3)seg.P1);
}
GL.End();
int NC = lines.Curves.Count;
for (int k = 0; k < NC; ++k)
{
DCurve3 c = lines.Curves[k];
GL.Begin(GL.LINE_STRIP);
GL.Color(lines.Color);
int NV = c.VertexCount;
for (int i = 0; i < NV; ++i)
{
GL.Vertex((Vector3)c[i]);
}
if (c.Closed)
{
GL.Vertex((Vector3)c[0]);
}
GL.End();
}
}
public fLineSetGameObject(GameObject baseGO, LineSet lines, string name = "line")
: base(baseGO, FGOFlags.EnablePreRender)
{
SetName(name);
this.lines = lines;
LineRenderingManager.AddLineSet(this);
}
void draw_quads(LineSet lines, Vector3f cameraPos)
{
GL.Begin(GL.QUADS);
GL.Color(lines.Color);
int NS = lines.Segments.Count;
for (int k = 0; k < NS; ++k)
{
Segment3d seg = lines.Segments[k];
Vector3f start = (Vector3f)seg.P0, end = (Vector3f)seg.P1;
if (lines.UseFixedNormal)
{
draw_quad_fixednormal(ref start, ref end, ref lines.FixedNormal, lines.Width);
}
else
{
draw_quad_viewalign(ref start, ref end, ref cameraPos, lines.Width);
}
}
int NC = lines.Curves.Count;
for (int k = 0; k < NC; ++k)
{
DCurve3 c = lines.Curves[k];
int NV = c.VertexCount;
Vector3f prev = (Vector3f)c[0];
for (int i = 1; i < NV; ++i)
{
Vector3f cur = (Vector3f)c[i];
if (lines.UseFixedNormal)
{
draw_quad_fixednormal(ref prev, ref cur, ref lines.FixedNormal, lines.Width);
}
else
{
draw_quad_viewalign(ref prev, ref cur, ref cameraPos, lines.Width);
}
prev = cur;
}
if (c.Closed)
{
Vector3f cur = (Vector3f)c[0];
if (lines.UseFixedNormal)
{
draw_quad_fixednormal(ref prev, ref cur, ref lines.FixedNormal, lines.Width);
}
else
{
draw_quad_viewalign(ref prev, ref cur, ref cameraPos, lines.Width);
}
}
}
GL.End();
}
void draw_lines(bool depth_test)
{
foreach (var go_set in Sets)
{
fGameObject go = go_set.Key;
if (go.IsDestroyed)
{
continue;
}
LineSet lines = go_set.Value;
if (go.IsVisible() == false)
{
continue;
}
if (lines.DepthTest != depth_test)
{
continue;
}
GL.PushMatrix();
try {
Transform transform = ((GameObject)go).transform;
GL.MultMatrix(transform.localToWorldMatrix);
Vector3f localCam = transform.InverseTransformPoint(CurrentCameraPos);
if (lines.WidthType == LineWidthType.Pixel)
{
if (lines.Width == 1)
{
draw_lines(lines, localCam);
}
else
{
draw_quads(lines, localCam);
}
}
else
{
draw_quads(lines, localCam);
}
} catch {
throw;
} finally {
GL.PopMatrix();
}
}
}
void enable_snap_indicator(bool enable)
{
if (enable == false && snap_indicator == null)
{
return;
}
if (enable && snap_indicator == null)
{
LineSet lines = new LineSet();
lines.UseFixedNormal = true;
lines.FixedNormal = Vector3f.AxisY;
int n = 360 / (int)SnapIncrementDeg;
int n45 = 45 / (int)SnapIncrementDeg;
int n90 = 90 / (int)SnapIncrementDeg;
double r = gizmoInitialRadius;
double r2 = gizmoInitialRadius * 1.05;
double r45 = gizmoInitialRadius * 1.10;
double r90 = gizmoInitialRadius * 1.175;
for (int k = 0; k < n; ++k)
{
float angle = ((float)k / (float)n) * MathUtil.TwoPIf;
double x = Math.Cos(angle), y = Math.Sin(angle);
Vector3d v = new Vector3d(x, 0, y); v.Normalize();
double far_r = ((k + n45) % n90) == 0 ? r90 :
(((k + n45) % n45) == 0 ? r45 : r2);
lines.Segments.Add(new Segment3d(r * v, far_r * v));
}
lines.Width = 1.0f;
lines.WidthType = LineWidthType.Pixel;
lines.Color = Colorf.DimGrey;
snap_indicator = new fLineSetGameObject(new GameObject(), lines, "indicator");
snap_indicator.SetLayer(FPlatform.WidgetOverlayLayer, true);
RootGameObject.AddChild(snap_indicator, false);
}
snap_indicator.SetVisible(enable);
}
public void AddLineSet(fGameObject source, LineSet set)
{
Util.gDevAssert(Sets.ContainsKey(source) == false);
Sets[source] = set;
}