public void SetMinMax(FixVec3 min, FixVec3 max)
{
_min = min;
_max = max;
UpdateFromMinMax();
}
public void Expand(FixVec3 amount)
{
_size += amount;
_extents = _size / 2;
_min = _center - _extents;
_max = _center + _extents;
}
public FixBounds(FixVec3 center, FixVec3 size)
{
_center = center;
_extents = size / 2;
_min = _center - _extents;
_max = _center + _extents;
_size = size;
}
public FixVec3 Cross(FixVec3 rhs)
{
return(new FixVec3(
Y * rhs.Z - Z * rhs.Y,
Z * rhs.X - X * rhs.Z,
X * rhs.Y - Y * rhs.X
));
}
public static FixTrans3 MakeScale(FixVec3 scale)
{
return(new FixTrans3(
scale.X, 0, 0, 0,
0, scale.Y, 0, 0,
0, 0, scale.Z, 0
));
}
public static FixTrans3 MakeTranslation(FixVec3 delta)
{
return(new FixTrans3(
1, 0, 0, delta.X,
0, 1, 0, delta.Y,
0, 0, 1, delta.Z
));
}
// todo: move to quaternions
public FixTrans3(FixVec3 position, FixVec3 scale, FixVec3 rotation)
{
this = MakeRotationX(rotation.X)
.RotateY(rotation.Y)
.RotateZ(rotation.Z)
.Scale(scale)
.Translate(position);
}
public FixTrans3 Scale(FixVec3 scale)
{
return(new FixTrans3(
M11 * scale.X, M12 * scale.X, M13 * scale.X, M14 * scale.X,
M21 * scale.Y, M22 * scale.Y, M23 * scale.Y, M24 * scale.Y,
M31 * scale.Z, M32 * scale.Z, M33 * scale.Z, M34 * scale.Z
));
}
public FixTrans3 Translate(FixVec3 delta)
{
return(new FixTrans3(
M11, M12, M13, M14 + delta.X,
M21, M22, M23, M24 + delta.Y,
M31, M32, M33, M34 + delta.Z
));
}
public FixVec3 ClosestPoint(FixVec3 point)
{
// Clamp point to bounds
Fix x = FixMath.Min(FixMath.Max(_min.X, point.X), _max.X);
Fix y = FixMath.Min(FixMath.Max(_min.Y, point.Y), _max.Y);
Fix z = FixMath.Min(FixMath.Max(_min.Z, point.Z), _max.Z);
// Return clamped point
return(new FixVec3(x, y, z));
}
/// <summary>
/// Constructs a quaternion from a vector3.
/// https://en.wikipedia.org/wiki/Conversion_between_quaternions_and_Euler_angles
/// </summary>
/// <param name="vector">The vector3 being converted.</param>
public FixQuaternion(FixVec3 vector)
{
w = FixMath.Cos(vector.z / 2) * FixMath.Cos(vector.y / 2) * FixMath.Cos(vector.x / 2)
+ FixMath.Sin(vector.z / 2) * FixMath.Sin(vector.y / 2) * FixMath.Sin(vector.x / 2);
x = FixMath.Cos(vector.z / 2) * FixMath.Cos(vector.y / 2) * FixMath.Sin(vector.x / 2)
- FixMath.Sin(vector.z / 2) * FixMath.Sin(vector.y / 2) * FixMath.Cos(vector.x / 2);
y = FixMath.Sin(vector.z / 2) * FixMath.Cos(vector.y / 2) * FixMath.Sin(vector.x / 2)
+ FixMath.Cos(vector.z / 2) * FixMath.Sin(vector.y / 2) * FixMath.Cos(vector.x / 2);
z = FixMath.Sin(vector.z / 2) * FixMath.Cos(vector.y / 2) * FixMath.Cos(vector.x / 2)
- FixMath.Cos(vector.z / 2) * FixMath.Sin(vector.y / 2) * FixMath.Sin(vector.x / 2);
}
public void DecomposeTRSPosition(float tX, float tY, float tZ, float sX, float sY, float sZ, float rX, float rY, float rZ)
{
FixVec3 pos = new FixVec3((Fix)tX, (Fix)tY, (Fix)tZ);
FixVec3 rotation = new FixVec3((Fix)rX, (Fix)rY, (Fix)rZ);
FixVec3 scale = new FixVec3((Fix)sX, (Fix)sY, (Fix)sZ);
FixTrans3 ft = new FixTrans3(pos, rotation, scale);
Assert.AreEqual(ft.Position().X.raw, pos.X.raw);
Assert.AreEqual(ft.Position().Y.raw, pos.Y.raw);
Assert.AreEqual(ft.Position().Z.raw, pos.Z.raw);
}
public void DecomposeTRSEulerAngle(float tX, float tY, float tZ, float sX, float sY, float sZ, float rX, float rY, float rZ)
{
FixVec3 pos = new FixVec3((Fix)tX, (Fix)tY, (Fix)tZ);
FixVec3 rotation = new FixVec3((Fix)rX, (Fix)rY, (Fix)rZ);
FixVec3 scale = new FixVec3((Fix)sX, (Fix)sY, (Fix)sZ);
FixTrans3 ft = new FixTrans3(pos, rotation, scale);
Assert.AreEqual(ft.EulerAngle().x.raw, rotation.x.raw);
Assert.AreEqual(ft.EulerAngle().y.raw, rotation.y.raw);
Assert.AreEqual(ft.EulerAngle().z.raw, rotation.z.raw);
}
public bool Contains(FixVec3 point)
{
if ((point.X < xMin) ||
(point.X > xMax) ||
(point.Y < yMin) ||
(point.Y > yMax))
{
return(false);
}
return(true);
}
public void EulerForwardBack(int x, int y, int z)
{
FixQuaternion quat = new FixQuaternion(new FixVec3(x, y, z));
FixVec3 fv = FixQuaternion.ToEuler(quat);
FixQuaternion final = new FixQuaternion(fv);
Assert.AreEqual(final.x.raw, quat.x.raw);
Assert.AreEqual(final.y.raw, quat.y.raw);
Assert.AreEqual(final.z.raw, quat.z.raw);
Assert.AreEqual(final.w.raw, quat.w.raw);
}
public bool Contains(FixVec3 point)
{
if ((point.X < _min.X) ||
(point.X > _max.X) ||
(point.Y < _min.Y) ||
(point.Y > _max.Y) ||
(point.Z < _min.Z) ||
(point.Z > _max.Z))
{
return(false);
}
return(true);
}
/// <summary>
/// we have to use a bit of trickery in this one. The rays must be cast from a small distance inside of our
/// collider (skinWidth) to avoid zero distance rays which will get the wrong normal. Because of this small offset
/// we have to increase the ray distance skinWidth then remember to remove skinWidth from deltaMovement before
/// actually moving the player
/// </summary>
void moveHorizontally(ref FixVec3 deltaMovement)
{
var isGoingRight = deltaMovement.x > 0;
var rayDistance = FixMath.Abs(deltaMovement.x) + _skinWidth;
var rayDirection = isGoingRight ? FixVec2.right : -FixVec2.right;
var initialRayOrigin = isGoingRight ? _raycastOrigins.bottomRight : _raycastOrigins.bottomLeft;
for (var i = 0; i < totalHorizontalRays; i++)
{
var ray = new FixVec2(initialRayOrigin.x, initialRayOrigin.y + i * _verticalDistanceBetweenRays);
// if we are grounded we will include oneWayPlatforms only on the first ray (the bottom one). this will allow us to
// walk up sloped oneWayPlatforms.
}
}
/// <summary>
/// handles adjusting deltaMovement if we are going up a slope.
/// </summary>
/// <returns><c>true</c>, if horizontal slope was handled, <c>false</c> otherwise.</returns>
/// <param name="deltaMovement">Delta movement.</param>
/// <param name="angle">Angle.</param>
bool handleHorizontalSlope(ref FixVec3 deltaMovement, Fix angle)
{
// disregard 90 degree angles (walls)
if (FixMath.Round(angle) == 90)
{
return(false);
}
if (angle < slopeLimit)
{
}
else // too steep. get out of here
{
deltaMovement.x = Fix.zero;
}
return(true);
}
public void Encapsulate(FixBounds other)
{
Fix x;
Fix y;
Fix z;
// Expand min
x = FixMath.Min(_min.X, other._min.X);
y = FixMath.Min(_min.Y, other._min.Y);
z = FixMath.Min(_min.Z, other._min.Z);
_min = new FixVec3(x, y, z);
// Expand max
x = FixMath.Max(_max.X, other._max.X);
y = FixMath.Max(_max.Y, other._max.Y);
z = FixMath.Max(_max.Z, other._max.Z);
_max = new FixVec3(x, y, z);
// Update other values
UpdateFromMinMax();
}
void moveVertically(ref FixVec3 deltaMovement)
{
var isGoingUp = deltaMovement.y > 0;
var rayDistance = FixMath.Abs(deltaMovement.y) + _skinWidth;
var rayDirection = isGoingUp ? FixVec2.up : -FixVec2.up;
var initialRayOrigin = isGoingUp ? _raycastOrigins.topLeft : _raycastOrigins.bottomLeft;
// apply our horizontal deltaMovement here so that we do our raycast from the actual position we would be in if we had moved
initialRayOrigin.x += deltaMovement.x;
// if we are moving up, we should ignore the layers in oneWayPlatformMask
var mask = platformMask;
if ((isGoingUp && !collisionState.wasGroundedLastFrame) || ignoreOneWayPlatformsThisFrame)
{
mask &= ~oneWayPlatformMask;
}
for (var i = 0; i < totalVerticalRays; i++)
{
var ray = new FixVec2(initialRayOrigin.x + i * _horizontalDistanceBetweenRays, initialRayOrigin.y);
}
}
public Fix SqrDistance(FixVec3 point)
{
FixVec3 clampedPoint = ClosestPoint(point);
return((point - clampedPoint).GetSqrMagnitude());
}
public static FixTrans3 MakeRotation(FixVec3 degrees)
{
return(MakeRotationX(degrees.X)
.RotateY(degrees.Y)
.RotateZ(degrees.Z));
}
public FixVec3 Apply(FixVec3 vec)
{
return(this * vec);
}
public FixTrans3 Rotate(FixVec3 degrees)
{
return(MakeRotation(degrees));
}
/// <summary>
/// checks the center point under the BoxCollider2D for a slope. If it finds one then the deltaMovement is adjusted so that
/// the player stays grounded and the slopeSpeedModifier is taken into account to speed up movement.
/// </summary>
/// <param name="deltaMovement">Delta movement.</param>
private void handleVerticalSlope(ref FixVec3 deltaMovement)
{
}
public Fix Dot(FixVec3 rhs)
{
return(X * rhs.X + Y * rhs.Y + Z * rhs.Z);
}
public FixRay(FixVec3 origin, FixVec3 direction)
{
_origin = origin;
_direction = direction.Normalize();
}
private void UpdateFromMinMax()
{
_size = _max - _min;
_extents = _size / 2;
_center = _min + extents;
}
/// <summary>
/// attempts to move the character to position + deltaMovement. Any colliders in the way will cause the movement to
/// stop when run into.
/// </summary>
/// <param name="deltaMovement">Delta movement.</param>
public void move(FixVec3 deltaMovement)
{
// save off our current grounded state which we will use for wasGroundedLastFrame and becameGroundedThisFrame
collisionState.wasGroundedLastFrame = collisionState.below;
// clear our state
collisionState.reset();
_raycastHitsThisFrame.Clear();
_isGoingUpSlope = false;
primeRaycastOrigins();
// first, we check for a slope below us before moving
// only check slopes if we are going down and grounded
if (deltaMovement.y < Fix.zero && collisionState.wasGroundedLastFrame)
{
handleVerticalSlope(ref deltaMovement);
}
// now we check movement in the horizontal dir
if (deltaMovement.x != Fix.zero)
{
moveHorizontally(ref deltaMovement);
}
// next, check movement in the vertical dir
if (deltaMovement.y != Fix.zero)
{
moveVertically(ref deltaMovement);
}
// move then update our state
deltaMovement.z = 0;
tfTransform.Position += deltaMovement;
// only calculate velocity if we have a non-zero deltaTime
if (Time.deltaTime > 0f)
{
velocity = deltaMovement / (Fix)Time.deltaTime;
}
// set our becameGrounded state based on the previous and current collision state
if (!collisionState.wasGroundedLastFrame && collisionState.below)
{
collisionState.becameGroundedThisFrame = true;
}
// if we are going up a slope we artificially set a y velocity so we need to zero it out here
if (_isGoingUpSlope)
{
velocity.y = 0;
}
// send off the collision events if we have a listener
if (onControllerCollidedEvent != null)
{
for (var i = 0; i < _raycastHitsThisFrame.Count; i++)
{
onControllerCollidedEvent(_raycastHitsThisFrame[i]);
}
}
ignoreOneWayPlatformsThisFrame = false;
}
// TODO - ED: Test
// Source: https://github.com/erich666/GraphicsGems/blob/master/gems/RayBox.c
public bool IntersectRay(FixRay ray, out Fix distance)
{
int whichPlane;
bool inside = true;
Quadrant[] quadrant = new Quadrant[3];
Fix[] maxT = new Fix[3];
Fix[] candidatePlane = new Fix[3];
Fix[] coord = new Fix[3];
FixVec3 intersection;
Fix[] minB = { _min.X, _min.Y, _min.Z };
Fix[] maxB = { _max.X, _max.Y, _max.Z };
Fix[] rayOrigin = { ray.origin.X, ray.origin.Y, ray.origin.Z };
Fix[] rayDirection = { ray.direction.X, ray.direction.Y, ray.direction.Z };
// Find candidate planes; this loop can be avoided if
// rays cast all from the eye(assume perpsective view).
for (int i = 0; i < 3; i++)
{
if (rayOrigin[i] < minB[i])
{
quadrant[i] = Quadrant.LEFT;
candidatePlane[i] = minB[i];
inside = false;
}
else if (rayOrigin[i] > maxB[i])
{
quadrant[i] = Quadrant.RIGHT;
candidatePlane[i] = maxB[i];
inside = false;
}
else
{
quadrant[i] = Quadrant.MIDDLE;
}
}
// Ray origin inside bounding box.
if (inside)
{
distance = Fix.Zero;
return(true);
}
// Calculate T distances to candidate planes.
for (int i = 0; i < 3; i++)
{
if (quadrant[i] != Quadrant.MIDDLE && rayDirection[i] != Fix.Zero)
{
maxT[i] = (candidatePlane[i] - rayOrigin[i]) / rayDirection[i];
}
else
{
maxT[i] = -Fix.One;
}
}
// Get largest of the maxT's for final choice of intersection.
whichPlane = 0;
for (int i = 1; i < 3; i++)
{
if (maxT[whichPlane] < maxT[i])
{
whichPlane = i;
}
}
// Check final candidate actually inside box.
if (maxT[whichPlane] < Fix.Zero)
{
distance = Fix.Zero;
return(false);
}
for (int i = 0; i < 3; i++)
{
if (whichPlane != i)
{
coord[i] = rayOrigin[i] + maxT[whichPlane] * rayDirection[i];
if (coord[i] < minB[i] || coord[i] > maxB[i])
{
distance = Fix.Zero;
return(false);
}
}
else
{
coord[i] = candidatePlane[i];
}
}
intersection = new FixVec3(coord[0], coord[1], coord[2]);
distance = (intersection - ray.origin).GetMagnitude();
return(true);
}