/// <summary>
/// Returns wether a models's bounding spheres (of meshes) collides with a terrain
/// </summary>
/// <param name="c1"></param>
/// <param name="t"></param>
/// <returns></returns>
private static bool CollisionSphereTerrain(ModelGeo c1, Terrain t)
{
BoundingSphere c1BoundingSphere;
//for (int i = 0; i < c1.mModel.Meshes.Count; i++)
for (int i = 0; i < c1.BoundingSpheres.Count; i++)
{
//c1BoundingSphere = c1.mModel.Meshes[i].BoundingSphere;
//c1BoundingSphere.Center = Vector3.Transform(c1BoundingSphere.Center, c1.mModel.Bones[i].Transform * c1.mMatWorld);
//c1BoundingSphere.Radius *= c1.mMaxScale;
c1BoundingSphere = c1.GetBoundingSphere(i);
if (c1BoundingSphere.Center.Y - t.GetHeight(c1BoundingSphere.Center) <= c1BoundingSphere.Radius)
{
n2 = t.GetNormal(c1BoundingSphere.Center);
n1 = -n2;
CollisionData.NewEvent(i, -1, n1, n2);
//return true;
}
}
//Console.WriteLine(c2.mModel.Meshes[0].MeshParts[0]. );
//return false;
return CollisionData.Event;
}
/// <summary>
/// Returns wether a models's meshes collides with a terrain
/// </summary>
/// <param name="m1"></param>
/// <param name="t"></param>
/// <returns></returns>
private static bool CollisionMeshTerrain(ModelGeo m1, Terrain t)
{
int meshIndex = -1;
int polyIndex = -1;
int meshPartIndex = -1;
for (int i = 0; i < m1.mModel.Meshes.Count; i++)
{
ModelMesh mesh = m1.mModel.Meshes[i];
for (int j = 0; j < mesh.MeshParts.Count; j++)
{
ModelMeshPart part = mesh.MeshParts[j];
for (int x = 0; x < part.PrimitiveCount; x++)
{
Matrix mat = m1.mMatBones[mesh.ParentBone.Index] * m1.mMatWorld;
Vector3 a = Vector3.Transform(m1.GetVertex(i, j, x * 3 + 0), mat);
Vector3 b = Vector3.Transform(m1.GetVertex(i, j, x * 3 + 1), mat);
Vector3 c = Vector3.Transform(m1.GetVertex(i, j, x * 3 + 2), mat);
if (a.Y < t.GetHeight(a) || b.Y < t.GetHeight(b) || c.Y < t.GetHeight(c))
{
meshIndex = i;
meshPartIndex = j;
polyIndex = x;
n1 = Vector3.Cross((a - b), (c - b));
n2 = t.GetNormal(a);
CollisionData.NewEvent(i, -1, n1, n2);
//return true;
}
}
}
}
//Console.WriteLine(fClosestPoly);
//return meshIndex != -1 && polyIndex != -1 && meshPartIndex != -1;
return CollisionData.Event;
}
