/// <summary>
/// Computes the complete intersection of the given ray with the object.
/// </summary>
/// <param name="p0">Ray origin.</param>
/// <param name="p1">Ray direction vector.</param>
/// <returns>Sorted list of intersection records.</returns>
public override LinkedList <Intersection> Intersect(Vector3d p0, Vector3d p1)
{
// !!!{{ TODO: add your accelerated intersection code here
if (mesh == null || mesh.Triangles < 1)
{
return(null);
}
List <Intersection> result = null;
Intersection i;
for (int id = 0; id < mesh.Triangles; id++)
{
Vector3 a, b, c;
mesh.GetTriangleVertices(id, out a, out b, out c);
Vector2d uv;
double t = Geometry.RayTriangleIntersection(ref p0, ref p1, ref a, ref b, ref c, out uv);
if (Double.IsInfinity(t))
{
continue;
}
if (result == null)
{
result = new List <Intersection>();
}
// Compile the 1st Intersection instance:
i = new Intersection(this);
i.T = t;
i.Enter =
i.Front = true;
i.CoordLocal = p0 + i.T * p1;
// Tmp data object
TmpData tmp = new TmpData();
tmp.face = id;
tmp.uv = uv;
Vector3 ba = b - a; // temporary value for flat shading
Vector3 ca = c - a;
Vector3.Cross(ref ba, ref ca, out tmp.normal);
i.SolidData = tmp;
result.Add(i);
if (!ShellMode)
{
continue;
}
// Compile the 2nd Intersection instance:
i = new Intersection(this);
i.T = t + 1.0e-4;
i.Enter =
i.Front = false;
i.CoordLocal = p0 + i.T * p1;
// Tmp data object
TmpData tmp2 = new TmpData();
tmp2.face = id;
tmp2.uv = uv;
tmp2.normal = -tmp.normal;
i.SolidData = tmp2;
result.Add(i);
}
if (result == null)
{
return(null);
}
// Finalizing the result: sort the result list
result.Sort();
return(new LinkedList <Intersection>(result));
// !!!}}
}
private void RenderScene(SceneBrep scene)
{
if (scene != null && scene.Triangles > 0)
{
if (scene.HasNormals() && scene.Normals > 0)
{
GL.Begin(PrimitiveType.Triangles);
for (int i = 0; i < scene.Triangles; ++i)
{
int v1, v2, v3;
scene.GetTriangleVertices(i, out v1, out v2, out v3);
GL.Normal3(scene.GetNormal(v1));
GL.Vertex3(scene.GetVertex(v1));
GL.Normal3(scene.GetNormal(v2));
GL.Vertex3(scene.GetVertex(v2));
GL.Normal3(scene.GetNormal(v3));
GL.Vertex3(scene.GetVertex(v3));
}
GL.End();
}
else
{
GL.End();
GL.Begin(PrimitiveType.Triangles);
for (int i = 0; i < scene.Triangles; ++i)
{
Vector3 v1, v2, v3;
scene.GetTriangleVertices(i, out v1, out v2, out v3);
GL.Vertex3(v1);
GL.Vertex3(v2);
GL.Vertex3(v3);
}
GL.End();
}
}
else // color cube (JB)
{
GL.Begin(PrimitiveType.Quads);
GL.Color3(0.0f, 1.0f, 0.0f); // Set The Color To Green
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Top)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Bottom Left Of The Quad (Top)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Bottom Right Of The Quad (Top)
GL.Color3(1.0f, 0.5f, 0.0f); // Set The Color To Orange
GL.Vertex3(1.0f, -1.0f, 1.0f); // Top Right Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Top Left Of The Quad (Bottom)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Bottom)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Bottom)
GL.Color3(1.0f, 0.0f, 0.0f); // Set The Color To Red
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Front)
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Front)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Front)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Front)
GL.Color3(1.0f, 1.0f, 0.0f); // Set The Color To Yellow
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Back)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Back)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Back)
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Back)
GL.Color3(0.0f, 0.0f, 1.0f); // Set The Color To Blue
GL.Vertex3(-1.0f, 1.0f, 1.0f); // Top Right Of The Quad (Left)
GL.Vertex3(-1.0f, 1.0f, -1.0f); // Top Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, -1.0f); // Bottom Left Of The Quad (Left)
GL.Vertex3(-1.0f, -1.0f, 1.0f); // Bottom Right Of The Quad (Left)
GL.Color3(1.0f, 0.0f, 1.0f); // Set The Color To Violet
GL.Vertex3(1.0f, 1.0f, -1.0f); // Top Right Of The Quad (Right)
GL.Vertex3(1.0f, 1.0f, 1.0f); // Top Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, 1.0f); // Bottom Left Of The Quad (Right)
GL.Vertex3(1.0f, -1.0f, -1.0f); // Bottom Right Of The Quad (Right)
GL.End();
}
}
