private int checkHitAxisAlignedBoundingBox(Vector3 eye, Vector3 ray, SmBoundingBox boundingBox, Vector3 position)
{
Vector3 dirFrac = new Vector3(1.0f / ray.X, 1.0f / ray.Y, 1.0f / ray.Z);
Vector3 lowerBound = boundingBox.minimum + position;
Vector3 upperBound = boundingBox.maximum + position;
float t1 = (lowerBound.X - eye.X) * dirFrac.X;
float t2 = (upperBound.X - eye.X) * dirFrac.X;
float t3 = (lowerBound.Y - eye.Y) * dirFrac.Y;
float t4 = (upperBound.Y - eye.Y) * dirFrac.Y;
float t5 = (lowerBound.Z - eye.Z) * dirFrac.Z;
float t6 = (upperBound.Z - eye.Z) * dirFrac.Z;
float tmin = Math.Max(Math.Max(Math.Min(t1, t2), Math.Min(t3, t4)), Math.Min(t5, t6));
float tmax = Math.Min(Math.Min(Math.Max(t1, t2), Math.Max(t3, t4)), Math.Max(t5, t6));
if (tmax < 0)
{
return(0);
}
if (tmin > tmax)
{
return(0);
}
else
{
return(1);
}
}
public SmModel(Model model, ByteOrder byteOrder)
{
// Create a List to hold all shape vertices for BBox calculation
List <Vector3> positionVectors = new List <Vector3>();
foreach (String shapeKey in model.Shapes.Keys)
{
Shape shape = model.Shapes[shapeKey];
// Create a List to hold the raw vertices for this Shape
List <float> rawVertices = new List <float>();
// Create the VertexBufferHelper with this Shape's vertex buffer
VertexBufferHelper helper = new VertexBufferHelper(model.VertexBuffers[shape.VertexBufferIndex], byteOrder);
// Get the positions in Vector4Fs
VertexBufferHelperAttrib positionAttrib = helper["_p0"];
Syroot.Maths.Vector4F[] vec4Positions = positionAttrib.Data;
foreach (Syroot.Maths.Vector4F position in vec4Positions)
{
// Switch based on format
switch (positionAttrib.Format)
{
case GX2AttribFormat.Format_32_32_32_32_Single:
case GX2AttribFormat.Format_32_32_32_Single:
rawVertices.Add(position.X);
rawVertices.Add(position.Y);
rawVertices.Add(position.Z);
if (positionAttrib.Format == GX2AttribFormat.Format_32_32_32_32_Single)
{
rawVertices.Add(position.W);
}
break;
case GX2AttribFormat.Format_16_16_16_16_Single:
rawVertices.Add(position.X);
rawVertices.Add(position.Y);
rawVertices.Add(position.Z);
rawVertices.Add(position.W);
break;
default:
throw new Exception("Unhandled attribute format " + positionAttrib.Format + ", go nag OatmealDome");
}
}
// Convert the list into an array
float[] verticesArray = rawVertices.ToArray();
// Create Vector3s for BBox calculation
for (int i = 0; i < verticesArray.Length; i += 3)
{
if (model.Name != "PipePackunDenStepA")
{
positionVectors.Add(new Vector3(verticesArray[i], verticesArray[i + 1], verticesArray[i + 2]));
}
else
{
positionVectors.Add(new Vector3(verticesArray[i], verticesArray[i], verticesArray[i]));
}
}
// Generate the VBO for this Shape
int vboId;
GL.GenBuffers(1, out vboId);
GL.BindBuffer(BufferTarget.ArrayBuffer, vboId);
GL.BufferData(BufferTarget.ArrayBuffer, sizeof(float) * verticesArray.Length, verticesArray, BufferUsageHint.StaticDraw);
// Use LoD 0 as the mesh
meshes.Add(new SmMesh(shape.Meshes[0], vboId));
}
// Create the bounding box for this model
boundingBox = new SmBoundingBox(positionVectors);
}
