Point4d Structure |
Represents the four coordinates of a point in four-dimensional space.
The W (fourth) dimension is often considered the weight of the point as seen in 3D space.
Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll)
SyntaxThe Point4d type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | Point4d(Point3d) |
Initializes a new instance of the Point4d class from the coordinates of a point.
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| Point4d(Point4d) |
Initializes a new point by copying coordinates from another point.
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| Point4d(Double, Double, Double, Double) |
Initializes a new instance of the Point4d class based on coordinates.
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Properties| Name | Description | |
|---|---|---|
 | IsValid |
Returns an indication regarding the validity of this point.
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 | Unset |
Gets the value of a point with all coordinates set as RhinoMath.UnsetValue.
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| W |
Gets or sets the W (fourth) coordinate -or weight- of this point.
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| X |
Gets or sets the X (first) coordinate of this point.
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| Y |
Gets or sets the Y (second) coordinate of this point.
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| Z |
Gets or sets the Z (third) coordinate of this point.
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Methods| Name | Description | |
|---|---|---|
| Add |
Sums two Point4d together.
(Provided for languages that do not support operator overloading. You can use the + operator otherwise) |
| EpsilonEquals |
Check that all values in other are within epsilon of the values in this
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| Equals(Object) |
Determines whether the specified System.Object is Point4d and has same coordinates as the present point.
(Overrides ValueTypeEquals(Object).) |
| Equals(Point4d) |
Determines whether the specified point has same value as the present point.
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| GetHashCode |
Computes the hash code for the present point.
(Overrides ValueTypeGetHashCode.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| Multiply |
Multiplies a point by a number.
(Provided for languages that do not support operator overloading. You can use the * operator otherwise) |
| Subtract |
Subtracts the second point from the first point.
(Provided for languages that do not support operator overloading. You can use the - operator otherwise) |
| ToString | Returns the fully qualified type name of this instance. (Overrides ValueTypeToString.) |
| ToString(String, IFormatProvider) | Formats the value of the current instance using the specified format. |
| Transform |
Transforms the present point in place. The transformation matrix acts on the left of the point. i.e.,
result = transformation*point |
Operators| Name | Description | |
|---|---|---|
 | Addition |
Sums two Point4d together.
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| Equality |
Determines whether two Point4d have equal values.
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| Inequality |
Determines whether two Point4d have different values.
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| Multiply(Point4d, Point4d) |
Multiplies two Point4d together, returning the dot (internal) product of the two.
This is not the cross product.
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| Multiply(Point4d, Double) |
Multiplies a point by a number.
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| Subtraction |
Subtracts the second point from the first point.
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See Also