public static bool Intersects(Ray ray, Vector3 vertex1, Vector3 vertex2, Vector3 vertex3, out float distance, out float barycentricU, out float barycentricV)
{
unsafe
{
fixed(float *pinnedDist = &distance)
{
fixed(float *pinnedU = &barycentricU)
{
fixed(float *pinnedV = &barycentricV)
{
if (IDllImportApi.D3DXIntersectTri(&vertex1,
&vertex2, &vertex3,
&ray.Position, &ray.Direction,
pinnedU, pinnedV, pinnedDist) != 0)
{
return(true);
}
else
{
return(false);
}
}
}
}
}
}
public static void RotationMatrix(ref Matrix matrix, out Quaternion result)
{
//float scale = matrix.M11 + matrix.M22 + matrix.M33;
//if( scale > 0.0f )
//{
// float sqrt = (float)( Math.Sqrt( (double)(scale + 1.0f) ) );
// result.W = sqrt * 0.5f;
// sqrt = 0.5f / sqrt;
// result.X = (matrix.M23 - matrix.M32) * sqrt;
// result.Y = (matrix.M31 - matrix.M13) * sqrt;
// result.Z = (matrix.M12 - matrix.M21) * sqrt;
// return;
//}
//if( (matrix.M11 >= matrix.M22) && (matrix.M11 >= matrix.M33) )
//{
// float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M11 - matrix.M22 - matrix.M33) ) );
// float half = 0.5f / sqrt;
// result.X = 0.5f * sqrt;
// result.Y = (matrix.M12 + matrix.M21) * half;
// result.Z = (matrix.M13 + matrix.M31) * half;
// result.W = (matrix.M23 - matrix.M32) * half;
// return;
//}
//if( matrix.M22 > matrix.M33 )
//{
// float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M22 - matrix.M11 - matrix.M33) ) );
// float half = 0.5f / sqrt;
// result.X = (matrix.M21 + matrix.M12) * half;
// result.Y = 0.5f * sqrt;
// result.Z = (matrix.M32 + matrix.M23) * half;
// result.W = (matrix.M31 - matrix.M13) * half;
// return;
//}
//float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M33 - matrix.M11 - matrix.M22) ) );
//float half = 0.5f / sqrt;
//result.X = (matrix.M31 + matrix.M13) * half;
//result.Y = (matrix.M32 + matrix.M23) * half;
//result.Z = 0.5f * sqrt;
//result.W = (matrix.M12 - matrix.M21) * half;
unsafe
{
fixed(Quaternion *pin_result = &result)
{
fixed(Matrix *pin_matrix = &matrix)
{
IDllImportApi.D3DXQuaternionRotationMatrix(pin_result, pin_matrix);
}
}
}
}
public static Quaternion Exponential(Quaternion quat)
{
Quaternion result = new Quaternion();
unsafe
{
IDllImportApi.D3DXQuaternionExp((Quaternion *)&result, (Quaternion *)&quat);
}
return(result);
}
public static Plane operator *(Plane plane, float scale)
{
Plane result;
unsafe
{
IDllImportApi.D3DXPlaneScale((Plane *)(&result), (Plane *)(&plane), scale);
}
return(result);
}
public static Quaternion Logarithm(Quaternion quat)
{
Quaternion result;
unsafe
{
IDllImportApi.D3DXQuaternionLn((Quaternion *)&result, (Quaternion *)&quat);
}
return(result);
}
public static Plane Multiply(Plane plane, float scale)
{
Plane result = new Plane();
unsafe
{
IDllImportApi.D3DXPlaneScale((Plane *)&result, (Plane *)&plane, scale);
}
return(result);
}
public static Quaternion Barycentric(Quaternion q1, Quaternion q2, Quaternion q3, float f, float g)
{
Quaternion result = new Quaternion();
unsafe
{
IDllImportApi.D3DXQuaternionBaryCentric((Quaternion *)&result, (Quaternion *)&q1,
(Quaternion *)&q2, (Quaternion *)&q3, f, g);
}
return(result);
}
public static Quaternion Squad(Quaternion q1, Quaternion a, Quaternion b, Quaternion c, float t)
{
Quaternion result;
unsafe
{
IDllImportApi.D3DXQuaternionSquad((Quaternion *)&result, (Quaternion *)&q1, (Quaternion *)&a,
(Quaternion *)&b, (Quaternion *)&c, t);
}
return(result);
}
public static void Exponential(ref Quaternion quat, out Quaternion result)
{
unsafe
{
fixed(Quaternion *pinQuat = &quat)
{
fixed(Quaternion *pinResult = &result)
{
IDllImportApi.D3DXQuaternionExp(pinResult, pinQuat);
}
}
}
}
public float GetAngleWithAxis(Vector3 axis)
{
unsafe
{
fixed(Quaternion *pinThis = &this)
{
float angle;
IDllImportApi.D3DXQuaternionToAxisAngle(pinThis, (Vector3 *)&axis, &angle);
return(angle);
}
}
}
public static void Logarithm(ref Quaternion quat, out Quaternion result)
{
unsafe
{
fixed(Quaternion *pinQuat = &quat)
{
fixed(Quaternion *pinResult = &result)
{
IDllImportApi.D3DXQuaternionLn((Quaternion *)pinResult, (Quaternion *)pinQuat);
}
}
}
}
public static void Multiply(ref Plane plane, float scale, out Plane result)
{
unsafe
{
fixed(Plane *pResult = &result)
{
fixed(Plane *pPlane = &plane)
{
IDllImportApi.D3DXPlaneScale(pResult, pPlane, scale);
}
}
}
}
public static BoundingSphere FromPoints(Vector3[] points)
{
BoundingSphere sphere = new BoundingSphere();
unsafe
{
fixed(Vector3 *pinnedPoints = &points[0])
{
int hr = IDllImportApi.D3DXComputeBoundingSphere(pinnedPoints, (UInt32)points.Length, sizeof(float) * 3, &sphere.Center, &sphere.Radius);
if (hr != 0)
{
return(new BoundingSphere());
}
}
}
return(sphere);
}
public static void Barycentric(ref Quaternion q1, ref Quaternion q2, ref Quaternion q3, float f, float g, out Quaternion result)
{
unsafe
{
fixed(Quaternion *pinResult = &result)
{
fixed(Quaternion *pin1 = &q1)
{
fixed(Quaternion *pin2 = &q2)
{
fixed(Quaternion *pin3 = &q3)
{
IDllImportApi.D3DXQuaternionBaryCentric(pinResult, pin1, pin2, pin3, f, g);
}
}
}
}
}
}
public static Quaternion[] SquadSetup(Quaternion source1, Quaternion source2, Quaternion source3, Quaternion source4)
{
Quaternion result1 = new Quaternion();
Quaternion result2 = new Quaternion();
Quaternion result3 = new Quaternion();
Quaternion[] results = new Quaternion[3];
unsafe
{
IDllImportApi.D3DXQuaternionSquadSetup((Quaternion *)&result1, (Quaternion *)&result2, (Quaternion *)&result3,
(Quaternion *)&source1, (Quaternion *)&source2, (Quaternion *)&source3, (Quaternion *)&source4);
}
results[0] = result1;
results[1] = result2;
results[2] = result3;
return(results);
}
public static void Squad(ref Quaternion q1, ref Quaternion a, ref Quaternion b, ref Quaternion c, float t, out Quaternion result)
{
unsafe
{
fixed(Quaternion *pin1 = &q1)
{
fixed(Quaternion *pinA = &a)
{
fixed(Quaternion *pinB = &b)
{
fixed(Quaternion *pinC = &c)
{
fixed(Quaternion *pinResult = &result)
{
IDllImportApi.D3DXQuaternionSquad(pinResult, pin1, pinA, pinB, pinC, t);
}
}
}
}
}
}
}
public static bool Intersects(ref Plane plane, ref Vector3 start, ref Vector3 end, out Vector3 intersectPoint)
{
unsafe
{
fixed(Plane *pPlane = &plane)
{
fixed(Vector3 *pStart = &start)
{
fixed(Vector3 *pEnd = &end)
{
fixed(Vector3 *pIntersectPoint = &intersectPoint)
{
if (0 == (int)IDllImportApi.D3DXPlaneIntersectLine(pIntersectPoint, pPlane, pStart, pEnd))
{
return(false);
}
return(true);
}
}
}
}
}
}
public unsafe static void Transform(Vector3 *vectorsIn, int inputStride, Matrix *transformation, Vector4 *vectorsOut, int outputStride, int count)
{
IDllImportApi.D3DXVec3TransformArray((vectorsOut), (UInt32)outputStride,
(vectorsIn), (UInt32)inputStride,
(transformation), (UInt32)count);
}
public unsafe static void TransformCoordinate(Vector3 *coordsIn, int inputStride, Matrix *transformation, Vector3 *coordsOut, int outputStride, int count)
{
IDllImportApi.D3DXVec3TransformCoordArray(coordsOut, (UInt32)outputStride,
coordsIn, (UInt32)inputStride,
transformation, (UInt32)count);
}
public static Quaternion RotationMatrix(Matrix matrix)
{
Quaternion result;
//float scale = matrix.M11 + matrix.M22 + matrix.M33;
//if( scale > 0.0f )
//{
// float sqrt = (float)( Math.Sqrt( (double)(scale + 1.0f) ) );
// result.W = sqrt * 0.5f;
// sqrt = 0.5f / sqrt;
// result.X = (matrix.M23 - matrix.M32) * sqrt;
// result.Y = (matrix.M31 - matrix.M13) * sqrt;
// result.Z = (matrix.M12 - matrix.M21) * sqrt;
// return result;
//}
//if( (matrix.M11 >= matrix.M22) && (matrix.M11 >= matrix.M33) )
//{
// float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M11 - matrix.M22 - matrix.M33) ) );
// float half = 0.5f / sqrt;
// result.X = 0.5f * sqrt;
// result.Y = (matrix.M12 + matrix.M21) * half;
// result.Z = (matrix.M13 + matrix.M31) * half;
// result.W = (matrix.M23 - matrix.M32) * half;
// return result;
//}
//if( matrix.M22 > matrix.M33 )
//{
// float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M22 - matrix.M11 - matrix.M33) ) );
// float half = 0.5f / sqrt;
// result.X = (matrix.M21 + matrix.M12) * half;
// result.Y = 0.5f * sqrt;
// result.Z = (matrix.M32 + matrix.M23) * half;
// result.W = (matrix.M31 - matrix.M13) * half;
// return result;
//}
//float sqrt = (float)( Math.Sqrt( (double)(1.0f + matrix.M33 - matrix.M11 - matrix.M22) ) );
//float half = 0.5f / sqrt;
//result.X = (matrix.M31 + matrix.M13) * half;
//result.Y = (matrix.M32 + matrix.M23) * half;
//result.Z = 0.5f * sqrt;
//result.W = (matrix.M12 - matrix.M21) * half;
//Quaternion result2;
unsafe
{
IDllImportApi.D3DXQuaternionRotationMatrix((Quaternion *)&result, (Matrix *)&matrix);
}
return(result);
}
public unsafe static void TransformNormal(Vector3 *normalsIn, int inputStride, Matrix *transformation, Vector3 *normalsOut, int outputStride, int count)
{
IDllImportApi.D3DXVec3TransformNormalArray(normalsOut, (UInt32)outputStride,
normalsIn, (UInt32)inputStride,
transformation, (UInt32)count);
}