public void Touch(Ray ray)
{
foreach(Component comp in components)
{
BoundingBox curBox = new BoundingBox(comp.Box);
curBox.Center = Vector3.Transform(curBox.Center, this.Transform);
curBox.Scale(this.scale);
Vector3? intersection = ray.GetIntersectionPoint(curBox);
if(intersection != null)
{
React();
return;
}
}
}
public Field(int dimX, int dimZ, string meshName, string materialName)
{
this.DimX = dimX;
this.DimZ = dimZ;
buffer1 = new float[DimX * DimZ];
buffer2 = new float[DimX * DimZ];
Mesh mesh = MeshLoader.GetMesh(meshName);
BoundingBox box = new BoundingBox(mesh);
for(int i = 0; i < dimX; i++)
for(int j = 0; j < dimZ; j++)
{
Component comp = new Component(meshName, new BoundingBox(box));
extents = box.HalfSize * 2.0f;
comp.Position = new Vector3(i * extents.X, 0.0f, j * extents.Z);
AddComponent(comp);
}
AddMaterial(MaterialLoader.GetMaterial(materialName));
}
public BoundingBox(BoundingBox box)
{
this.min = box.Min;
this.max = box.Max;
}
public float? GetIntersectionParam(BoundingBox box)
{
//first test if start in box
if (Origin.X >= box.Min.X
&& Origin.X <= box.Max.X
&& Origin.Y >= box.Min.Y
&& Origin.Y <= box.Max.Y
&& Origin.Z >= box.Min.Z
&& Origin.Z <= box.Max.Z)
return 0.0f;// here we concidere cube is full and origine is in cube so intersect at origine
//Second we check each face
Vector3 maxT = new Vector3(-1.0f, -1.0f, -1.0f);
//Vector3 minT = new Vector3(-1.0f);
//calcul intersection with each faces
if (Origin.X < box.Min.X && Direction.X != 0.0f)
maxT.X = (box.Min.X - Origin.X) / Direction.X;
else if (Origin.X > box.Max.X && Direction.X != 0.0f)
maxT.X = (box.Max.X - Origin.X) / Direction.X;
if (Origin.Y < box.Min.Y && Direction.Y != 0.0f)
maxT.Y = (box.Min.Y - Origin.Y) / Direction.Y;
else if (Origin.Y > box.Max.Y && Direction.Y != 0.0f)
maxT.Y = (box.Max.Y - Origin.Y) / Direction.Y;
if (Origin.Z < box.Min.Z && Direction.Z != 0.0f)
maxT.Z = (box.Min.Z - Origin.Z) / Direction.Z;
else if (Origin.Z > box.Max.Z && Direction.Z != 0.0f)
maxT.Z = (box.Max.Z - Origin.Z) / Direction.Z;
//get the maximum maxT
if (maxT.X > maxT.Y && maxT.X > maxT.Z)
{
if (maxT.X < 0.0f)
return null;// ray go on opposite of face
//coordonate of hit point of face of cube
float coord = Origin.Z + maxT.X * Direction.Z;
// if hit point coord ( intersect face with ray) is out of other plane coord it miss
if (coord < box.Min.Z || coord > box.Max.Z)
return null;
coord = Origin.Y + maxT.X * Direction.Y;
if (coord < box.Min.Y || coord > box.Max.Y)
return null;
return maxT.X;
}
if (maxT.Y > maxT.X && maxT.Y > maxT.Z)
{
if (maxT.Y < 0.0f)
return null;// ray go on opposite of face
//coordonate of hit point of face of cube
float coord = Origin.Z + maxT.Y * Direction.Z;
// if hit point coord ( intersect face with ray) is out of other plane coord it miss
if (coord < box.Min.Z || coord > box.Max.Z)
return null;
coord = Origin.X + maxT.Y * Direction.X;
if (coord < box.Min.X || coord > box.Max.X)
return null;
return maxT.Y;
}
else //Z
{
if (maxT.Z < 0.0f)
return null;// ray go on opposite of face
//coordonate of hit point of face of cube
float coord = Origin.X + maxT.Z * Direction.X;
// if hit point coord ( intersect face with ray) is out of other plane coord it miss
if (coord < box.Min.X || coord > box.Max.X)
return null;
coord = Origin.Y + maxT.Z * Direction.Y;
if (coord < box.Min.Y || coord > box.Max.Y)
return null;
return maxT.Z;
}
}
public Vector3? GetIntersectionPoint(BoundingBox box)
{
float? t = GetIntersectionParam(box);
if(t!=null)
return Origin + Direction * (float)t;
else
return null;
}
public Component(Mesh mesh, BoundingBox box)
{
Mesh = mesh;
Box = box;
}
public Component( Mesh mesh )
{
Mesh = mesh;
Box = new BoundingBox(mesh);
}
public Component(string meshName, BoundingBox box)
{
Mesh = MeshLoader.GetMesh(meshName);
Box = box;
}
public Component(string meshName)
{
Mesh = MeshLoader.GetMesh(meshName);
Box = new BoundingBox(Mesh);
}
